From 7507d69a484ac7a344f581f52984856cd11afc8b Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Mon, 11 May 2020 22:06:54 +0100
Subject: [PATCH 01/41] First draft experience blocks

---
 inc/features/blocks/experience/block.json     |  17 +
 .../experience/components/AudiencePicker.js   | 131 +++++
 .../blocks/experience/components/URLInput.js  | 539 ++++++++++++++++++
 inc/features/blocks/experience/edit.css       |  46 ++
 inc/features/blocks/experience/edit.js        | 216 +++++++
 inc/features/blocks/experience/index.js       |  18 +
 inc/features/blocks/experience/register.php   |  81 +++
 inc/features/blocks/experience/save.js        |  11 +
 inc/features/blocks/namespace.php             |  39 ++
 inc/features/blocks/variant/block.json        |  22 +
 inc/features/blocks/variant/edit.js           |  49 ++
 inc/features/blocks/variant/index.js          |  18 +
 inc/features/blocks/variant/register.php      |  63 ++
 inc/features/blocks/variant/save.js           |  11 +
 inc/namespace.php                             |  11 +
 package-lock.json                             | 145 ++---
 package.json                                  |   2 +
 src/experiments.js                            |  58 ++
 webpack.config.js                             |   2 +
 19 files changed, 1415 insertions(+), 64 deletions(-)
 create mode 100644 inc/features/blocks/experience/block.json
 create mode 100644 inc/features/blocks/experience/components/AudiencePicker.js
 create mode 100644 inc/features/blocks/experience/components/URLInput.js
 create mode 100644 inc/features/blocks/experience/edit.css
 create mode 100644 inc/features/blocks/experience/edit.js
 create mode 100644 inc/features/blocks/experience/index.js
 create mode 100644 inc/features/blocks/experience/register.php
 create mode 100644 inc/features/blocks/experience/save.js
 create mode 100644 inc/features/blocks/namespace.php
 create mode 100644 inc/features/blocks/variant/block.json
 create mode 100644 inc/features/blocks/variant/edit.js
 create mode 100644 inc/features/blocks/variant/index.js
 create mode 100644 inc/features/blocks/variant/register.php
 create mode 100644 inc/features/blocks/variant/save.js

diff --git a/inc/features/blocks/experience/block.json b/inc/features/blocks/experience/block.json
new file mode 100644
index 0000000..1e54cb4
--- /dev/null
+++ b/inc/features/blocks/experience/block.json
@@ -0,0 +1,17 @@
+{
+    "name": "altis/experience-block",
+    "settings": {
+        "category": "layout",
+        "icon": "lightbulb",
+        "supports": {
+            "alignWide": true,
+            "html": false,
+            "align": true
+        },
+        "attributes": {
+            "clientId": {
+                "type": "string"
+            }
+        }
+    }
+}
diff --git a/inc/features/blocks/experience/components/AudiencePicker.js b/inc/features/blocks/experience/components/AudiencePicker.js
new file mode 100644
index 0000000..bbd9a22
--- /dev/null
+++ b/inc/features/blocks/experience/components/AudiencePicker.js
@@ -0,0 +1,131 @@
+import React, { useState, useEffect } from 'react';
+import URLInput from './URLInput';
+
+const { apiFetch } = wp;
+const { Button } = wp.components;
+const { decodeEntities } = wp.htmlEntities;
+const { __ } = wp.i18n;
+const { addQueryArgs } = wp.url;
+
+/**
+ * Fetches link suggestions from the API. This function is an exact copy of a function found at:
+ *
+ * wordpress/editor/src/components/provider/index.js
+ *
+ * @param {Object} search
+ * @param {number} perPage
+ * @return {Promise<Object[]>} List of suggestions
+ */
+const fetchSuggestions = async ( search, { perPage = 20 } = {} ) => {
+	const posts = await apiFetch( {
+		path: addQueryArgs( '/wp/v2/audiences', {
+			search,
+			per_page: perPage,
+			status: 'publish',
+		} ),
+	} );
+
+	return posts.map( post => ( {
+		id: post.id,
+		title: decodeEntities( post.title.rendered ) || __( '(no title)' ),
+		url: '',
+	} ) );
+};
+
+/**
+ * Fetch a single audience by ID.
+ *
+ * @param {number} id An audience post ID.
+ * @param {Function} callback An optional callback that receives the audience object.
+ * @return {Promise<Object>} Audience post object.
+ */
+const fetchAudience = async ( id, callback ) => {
+	const post = await apiFetch( {
+		path: `/wp/v2/audiences/${ id }`
+	} );
+
+	const audience = {
+		id: post.id,
+		title: decodeEntities( post.title.rendered ) || __( '(no title)' ),
+		audience: post.audience,
+		status: post.status,
+	};
+
+	// Allow for easy use with useEffect.
+	callback && callback( audience );
+
+	return audience;
+}
+
+const AudiencePicker = props => {
+	const [ value, setValue ] = useState( '' );
+	const [ selectedAudience, setAudience ] = useState( null );
+
+	// If we have an ID and no value trigger a fetch of the audience object so
+	// that external components can access the audience post data.
+	useEffect( () => {
+		if ( ! props.audience || value !== '' ) {
+			return;
+		}
+
+		fetchAudience( props.audience, audience => {
+			setAudience( audience );
+			props.onSelect( audience );
+		} );
+	}, [ props.audience ] );
+
+	return (
+		<URLInput
+			className="audience-picker-control"
+			label={ props.label || '' }
+			autoFocus={ props.autoFocus || false }
+			placeholder={ props.placeholder || __( 'Search audiences', 'altis-experiments' ) }
+			isFullWidth={ true }
+			hasBorder={ true }
+			__experimentalFetchLinkSuggestions={ fetchSuggestions }
+			fetchLinkSuggestions={ fetchSuggestions }
+			value={ value }
+			onChange={ ( text, audience ) => {
+				// Only update the input value when we don't receive a post object.
+				if ( ! audience ) {
+					setValue( text );
+				}
+
+				// Trigger select event if we receive a post object.
+				if ( audience ) {
+					setAudience( audience );
+					if ( props.onSelect ) {
+						props.onSelect( audience );
+					}
+				}
+			} }
+		>
+			{ selectedAudience && (
+				<p className="audience-picker-control__value">
+					<strong>{ __( 'Current:' ) }</strong>
+					{ ' ' }
+					<span>{ selectedAudience.title }</span>
+				</p>
+			) }
+			{ props.audience && (
+				<Button
+					isLink
+					isDestructive
+					onClick={ () => {
+						setValue( '' );
+						setAudience( null );
+
+						// Allow clearing the value.
+						if ( props.onClearSelection ) {
+							props.onClearSelection();
+						}
+					} }
+				>
+					{ __( 'Clear selection' ) }
+				</Button>
+			) }
+		</URLInput>
+	);
+}
+
+export default AudiencePicker;
diff --git a/inc/features/blocks/experience/components/URLInput.js b/inc/features/blocks/experience/components/URLInput.js
new file mode 100644
index 0000000..80d82f8
--- /dev/null
+++ b/inc/features/blocks/experience/components/URLInput.js
@@ -0,0 +1,539 @@
+import React from 'react';
+
+/**
+ * External dependencies
+ */
+const { throttle, isFunction } = window._;
+import classnames from 'classnames';
+import scrollIntoView from 'dom-scroll-into-view';
+
+/**
+ * WordPress dependencies
+ */
+const { __, sprintf, _n } = wp.i18n;
+const { Component, createRef } = wp.element;
+const { UP, DOWN, ENTER, TAB } = wp.keycodes;
+const {
+	BaseControl,
+	Button,
+	Spinner,
+	withSpokenMessages,
+	Popover,
+} = wp.components;
+const { withInstanceId, withSafeTimeout, compose } = wp.compose;
+const { withSelect } = wp.data;
+const { isURL } = wp.url;
+
+// Since URLInput is rendered in the context of other inputs, but should be
+// considered a separate modal node, prevent keyboard events from propagating
+// as being considered from the input.
+const stopEventPropagation = ( event ) => event.stopPropagation();
+
+class URLInput extends Component {
+	constructor( props ) {
+		super( props );
+
+		this.onChange = this.onChange.bind( this );
+		this.onFocus = this.onFocus.bind( this );
+		this.onKeyDown = this.onKeyDown.bind( this );
+		this.selectLink = this.selectLink.bind( this );
+		this.handleOnClick = this.handleOnClick.bind( this );
+		this.bindSuggestionNode = this.bindSuggestionNode.bind( this );
+		this.autocompleteRef = props.autocompleteRef || createRef();
+		this.inputRef = createRef();
+		this.updateSuggestions = throttle(
+			this.updateSuggestions.bind( this ),
+			200
+		);
+
+		this.suggestionNodes = [];
+
+		this.isUpdatingSuggestions = false;
+
+		this.state = {
+			suggestions: [],
+			showSuggestions: false,
+			selectedSuggestion: null,
+		};
+	}
+
+	componentDidUpdate( prevProps ) {
+		const { showSuggestions, selectedSuggestion } = this.state;
+		const { value } = this.props;
+
+		// only have to worry about scrolling selected suggestion into view
+		// when already expanded
+		if (
+			showSuggestions &&
+			selectedSuggestion !== null &&
+			! this.scrollingIntoView
+		) {
+			this.scrollingIntoView = true;
+
+			scrollIntoView(
+				this.suggestionNodes[ selectedSuggestion ],
+				this.autocompleteRef.current,
+				{
+					onlyScrollIfNeeded: true,
+				}
+			);
+
+			this.props.setTimeout( () => {
+				this.scrollingIntoView = false;
+			}, 100 );
+		}
+
+		// Only attempt an update on suggestions if the input value has actually changed.
+		if (
+			prevProps.value !== value &&
+			this.shouldShowInitialSuggestions()
+		) {
+			this.updateSuggestions();
+		}
+	}
+
+	componentDidMount() {
+		if ( this.shouldShowInitialSuggestions() ) {
+			this.updateSuggestions();
+		}
+	}
+
+	componentWillUnmount() {
+		delete this.suggestionsRequest;
+	}
+
+	bindSuggestionNode( index ) {
+		return ( ref ) => {
+			this.suggestionNodes[ index ] = ref;
+		};
+	}
+
+	shouldShowInitialSuggestions() {
+		const { suggestions } = this.state;
+		const {
+			__experimentalShowInitialSuggestions = false,
+			value,
+		} = this.props;
+		return (
+			! this.isUpdatingSuggestions &&
+			__experimentalShowInitialSuggestions &&
+			! ( value && value.length ) &&
+			! ( suggestions && suggestions.length )
+		);
+	}
+
+	updateSuggestions( value = '' ) {
+		const {
+			__experimentalFetchLinkSuggestions: fetchLinkSuggestions,
+			__experimentalHandleURLSuggestions: handleURLSuggestions,
+		} = this.props;
+
+		if ( ! fetchLinkSuggestions ) {
+			return;
+		}
+
+		const isInitialSuggestions = ! ( value && value.length );
+
+		// Allow a suggestions request if:
+		// - there are at least 2 characters in the search input (except manual searches where
+		//   search input length is not required to trigger a fetch)
+		// - this is a direct entry (eg: a URL)
+		if (
+			! isInitialSuggestions &&
+			( value.length < 2 || ( ! handleURLSuggestions && isURL( value ) ) )
+		) {
+			this.setState( {
+				showSuggestions: false,
+				selectedSuggestion: null,
+				loading: false,
+			} );
+
+			return;
+		}
+
+		this.isUpdatingSuggestions = true;
+
+		this.setState( {
+			showSuggestions: true,
+			selectedSuggestion: null,
+			loading: true,
+		} );
+
+		const request = fetchLinkSuggestions( value, {
+			isInitialSuggestions,
+		} );
+
+		request
+			.then( ( suggestions ) => {
+				// A fetch Promise doesn't have an abort option. It's mimicked by
+				// comparing the request reference in on the instance, which is
+				// reset or deleted on subsequent requests or unmounting.
+				if ( this.suggestionsRequest !== request ) {
+					return;
+				}
+
+				this.setState( {
+					suggestions,
+					loading: false,
+				} );
+
+				if ( !! suggestions.length ) {
+					this.props.debouncedSpeak(
+						sprintf(
+							/* translators: %s: number of results. */
+							_n(
+								'%d result found, use up and down arrow keys to navigate.',
+								'%d results found, use up and down arrow keys to navigate.',
+								suggestions.length
+							),
+							suggestions.length
+						),
+						'assertive'
+					);
+				} else {
+					this.props.debouncedSpeak(
+						__( 'No results.' ),
+						'assertive'
+					);
+				}
+				this.isUpdatingSuggestions = false;
+			} )
+			.catch( () => {
+				if ( this.suggestionsRequest === request ) {
+					this.setState( {
+						loading: false,
+					} );
+					this.isUpdatingSuggestions = false;
+				}
+			} );
+
+		// Note that this assignment is handled *before* the async search request
+		// as a Promise always resolves on the next tick of the event loop.
+		this.suggestionsRequest = request;
+	}
+
+	onChange( event ) {
+		const inputValue = event.target.value;
+
+		this.props.onChange( inputValue );
+		if ( ! this.props.disableSuggestions ) {
+			this.updateSuggestions( inputValue.trim() );
+		}
+	}
+
+	onFocus() {
+		const { suggestions } = this.state;
+		const { disableSuggestions, value } = this.props;
+
+		// When opening the link editor, if there's a value present, we want to load the suggestions pane with the results for this input search value
+		// Don't re-run the suggestions on focus if there are already suggestions present (prevents searching again when tabbing between the input and buttons)
+		if (
+			value &&
+			! disableSuggestions &&
+			! this.isUpdatingSuggestions &&
+			! ( suggestions && suggestions.length )
+		) {
+			// Ensure the suggestions are updated with the current input value
+			this.updateSuggestions( value.trim() );
+		}
+	}
+
+	onKeyDown( event ) {
+		const {
+			showSuggestions,
+			selectedSuggestion,
+			suggestions,
+			loading,
+		} = this.state;
+
+		// If the suggestions are not shown or loading, we shouldn't handle the arrow keys
+		// We shouldn't preventDefault to allow block arrow keys navigation
+		if ( ! showSuggestions || ! suggestions.length || loading ) {
+			// In the Windows version of Firefox the up and down arrows don't move the caret
+			// within an input field like they do for Mac Firefox/Chrome/Safari. This causes
+			// a form of focus trapping that is disruptive to the user experience. This disruption
+			// only happens if the caret is not in the first or last position in the text input.
+			// See: https://github.com/WordPress/gutenberg/issues/5693#issuecomment-436684747
+			switch ( event.keyCode ) {
+				// When UP is pressed, if the caret is at the start of the text, move it to the 0
+				// position.
+				case UP: {
+					if ( 0 !== event.target.selectionStart ) {
+						event.stopPropagation();
+						event.preventDefault();
+
+						// Set the input caret to position 0
+						event.target.setSelectionRange( 0, 0 );
+					}
+					break;
+				}
+				// When DOWN is pressed, if the caret is not at the end of the text, move it to the
+				// last position.
+				case DOWN: {
+					if (
+						this.props.value.length !== event.target.selectionStart
+					) {
+						event.stopPropagation();
+						event.preventDefault();
+
+						// Set the input caret to the last position
+						event.target.setSelectionRange(
+							this.props.value.length,
+							this.props.value.length
+						);
+					}
+					break;
+				}
+			}
+
+			return;
+		}
+
+		const suggestion = this.state.suggestions[
+			this.state.selectedSuggestion
+		];
+
+		switch ( event.keyCode ) {
+			case UP: {
+				event.stopPropagation();
+				event.preventDefault();
+				const previousIndex = ! selectedSuggestion
+					? suggestions.length - 1
+					: selectedSuggestion - 1;
+				this.setState( {
+					selectedSuggestion: previousIndex,
+				} );
+				break;
+			}
+			case DOWN: {
+				event.stopPropagation();
+				event.preventDefault();
+				const nextIndex =
+					selectedSuggestion === null ||
+					selectedSuggestion === suggestions.length - 1
+						? 0
+						: selectedSuggestion + 1;
+				this.setState( {
+					selectedSuggestion: nextIndex,
+				} );
+				break;
+			}
+			case TAB: {
+				if ( this.state.selectedSuggestion !== null ) {
+					this.selectLink( suggestion );
+					// Announce a link has been selected when tabbing away from the input field.
+					this.props.speak( __( 'Link selected.' ) );
+				}
+				break;
+			}
+			case ENTER: {
+				if ( this.state.selectedSuggestion !== null ) {
+					event.stopPropagation();
+					this.selectLink( suggestion );
+				}
+				break;
+			}
+		}
+	}
+
+	selectLink( suggestion ) {
+		this.props.onChange( suggestion.url, suggestion );
+		this.setState( {
+			selectedSuggestion: null,
+			showSuggestions: false,
+		} );
+	}
+
+	handleOnClick( suggestion ) {
+		this.selectLink( suggestion );
+		// Move focus to the input field when a link suggestion is clicked.
+		this.inputRef.current.focus();
+	}
+
+	static getDerivedStateFromProps(
+		{
+			value,
+			disableSuggestions,
+			__experimentalShowInitialSuggestions = false,
+		},
+		{ showSuggestions }
+	) {
+		let shouldShowSuggestions = showSuggestions;
+
+		const hasValue = value && value.length;
+
+		if ( ! __experimentalShowInitialSuggestions && ! hasValue ) {
+			shouldShowSuggestions = false;
+		}
+
+		if ( disableSuggestions === true ) {
+			shouldShowSuggestions = false;
+		}
+
+		return {
+			showSuggestions: shouldShowSuggestions,
+		};
+	}
+
+	render() {
+		const {
+			children,
+			label,
+			instanceId,
+			className,
+			isFullWidth,
+			hasBorder,
+			__experimentalRenderSuggestions: renderSuggestions,
+			placeholder = __( 'Paste URL or type to search' ),
+			value = '',
+			autoFocus = true,
+			__experimentalShowInitialSuggestions = false,
+		} = this.props;
+
+		const {
+			showSuggestions,
+			suggestions,
+			selectedSuggestion,
+			loading,
+		} = this.state;
+
+		const id = `url-input-control-${ instanceId }`;
+
+		const suggestionsListboxId = `block-editor-url-input-suggestions-${ instanceId }`;
+		const suggestionOptionIdPrefix = `block-editor-url-input-suggestion-${ instanceId }`;
+
+		const suggestionsListProps = {
+			id: suggestionsListboxId,
+			ref: this.autocompleteRef,
+			role: 'listbox',
+		};
+
+		const buildSuggestionItemProps = ( suggestion, index ) => {
+			return {
+				role: 'option',
+				tabIndex: '-1',
+				id: `${ suggestionOptionIdPrefix }-${ index }`,
+				ref: this.bindSuggestionNode( index ),
+				'aria-selected': index === selectedSuggestion,
+			};
+		};
+
+		/* eslint-disable jsx-a11y/no-autofocus */
+		return (
+			<BaseControl
+				label={ label }
+				id={ id }
+				className={ classnames( 'block-editor-url-input', className, {
+					'is-full-width': isFullWidth,
+					'has-border': hasBorder,
+				} ) }
+			>
+				<input
+					className="block-editor-url-input__input"
+					autoFocus={ autoFocus }
+					type="text"
+					aria-label={ __( 'URL' ) }
+					required
+					value={ value }
+					onChange={ this.onChange }
+					onFocus={ this.onFocus }
+					onInput={ stopEventPropagation }
+					placeholder={ placeholder }
+					onKeyDown={ this.onKeyDown }
+					role="combobox"
+					aria-expanded={ showSuggestions }
+					aria-autocomplete="list"
+					aria-owns={ suggestionsListboxId }
+					aria-activedescendant={
+						selectedSuggestion !== null
+							? `${ suggestionOptionIdPrefix }-${ selectedSuggestion }`
+							: undefined
+					}
+					ref={ this.inputRef }
+				/>
+
+				{ loading && <Spinner /> }
+
+				{ isFunction( renderSuggestions ) &&
+					showSuggestions &&
+					!! suggestions.length &&
+					renderSuggestions( {
+						suggestions,
+						selectedSuggestion,
+						suggestionsListProps,
+						buildSuggestionItemProps,
+						isLoading: loading,
+						handleSuggestionClick: this.handleOnClick,
+						isInitialSuggestions:
+							__experimentalShowInitialSuggestions &&
+							! ( value && value.length ),
+					} ) }
+
+				{ ! isFunction( renderSuggestions ) &&
+					showSuggestions &&
+					!! suggestions.length && (
+						<Popover
+							position="bottom"
+							noArrow
+							focusOnMount={ false }
+						>
+							<div
+								{ ...suggestionsListProps }
+								className={ classnames(
+									'block-editor-url-input__suggestions',
+									`${ className }__suggestions`
+								) }
+							>
+								{ suggestions.map( ( suggestion, index ) => (
+									<Button
+										{ ...buildSuggestionItemProps(
+											suggestion,
+											index
+										) }
+										key={ suggestion.id }
+										className={ classnames(
+											'block-editor-url-input__suggestion',
+											{
+												'is-selected':
+													index ===
+													selectedSuggestion,
+											}
+										) }
+										onClick={ () =>
+											this.handleOnClick( suggestion )
+										}
+									>
+										{ suggestion.title }
+									</Button>
+								) ) }
+							</div>
+						</Popover>
+					) }
+
+				{ children }
+			</BaseControl>
+		);
+		/* eslint-enable jsx-a11y/no-autofocus */
+	}
+}
+
+/**
+ * @see https://github.com/WordPress/gutenberg/blob/master/packages/block-editor/src/components/url-input/README.md
+ */
+export default compose(
+	withSafeTimeout,
+	withSpokenMessages,
+	withInstanceId,
+	withSelect( ( select, props ) => {
+		// If a link suggestions handler is already provided then
+		// bail
+		if ( isFunction( props.__experimentalFetchLinkSuggestions ) ) {
+			return;
+		}
+		const { getSettings } = select( 'core/block-editor' );
+		return {
+			__experimentalFetchLinkSuggestions: getSettings()
+				.__experimentalFetchLinkSuggestions,
+		};
+	} )
+)( URLInput );
diff --git a/inc/features/blocks/experience/edit.css b/inc/features/blocks/experience/edit.css
new file mode 100644
index 0000000..ed4054d
--- /dev/null
+++ b/inc/features/blocks/experience/edit.css
@@ -0,0 +1,46 @@
+/**
+ * Experience block editor CSS.
+ */
+
+.altis-experience-block-header {
+	text-transform: uppercase;
+	font-variant: small-caps;
+	font-size: 16px;
+	font-weight: bold;
+	background: repeating-linear-gradient(
+		45deg,
+		rgba(0, 0, 0, .05),
+		rgba(0, 0, 0, .05) 10px,
+		rgba(0, 0, 0, 0) 10px,
+		rgba(0, 0, 0, 0) 20px
+	);
+	padding: 14px;
+	margin: 0 -14px -28px;
+	position: relative;
+	top: -14px;
+}
+
+.altis-variant-toolbar .components-button.is-link {
+	padding-right: 10px;
+	padding-left: 10px;
+}
+
+.altis-variant-toolbar--active .components-button.is-link {
+	font-weight: 700;
+	color: inherit;
+	text-decoration: none;
+	padding-left: 2px;
+}
+
+.audience-picker-control .audience-picker-control__value {
+	margin-top: 6px;
+	margin-bottom: 4px;
+}
+
+.wp-block[data-type="altis/experience-block-variant"] {
+	max-width: none;
+}
+
+.wp-block[data-type="altis/experience-block-variant"] .wp-block {
+	max-width: none;
+}
diff --git a/inc/features/blocks/experience/edit.js b/inc/features/blocks/experience/edit.js
new file mode 100644
index 0000000..6e385e3
--- /dev/null
+++ b/inc/features/blocks/experience/edit.js
@@ -0,0 +1,216 @@
+import React, { Fragment, useState } from 'react';
+import AudiencePicker from './components/AudiencePicker';
+
+const {
+	// AlignmentToolbar,
+	BlockControls,
+	InnerBlocks,
+	InspectorControls,
+} = wp.blockEditor;
+const { createBlock } = wp.blocks;
+const {
+	Button,
+	PanelBody,
+	Toolbar,
+} = wp.components;
+const { compose } = wp.compose;
+const { withSelect, withDispatch } = wp.data;
+const { __ } = wp.i18n;
+
+/**
+ * Only variants can be direct descendents so that we can generate
+ * usable markup.
+ */
+const ALLOWED_BLOCKS = [ 'altis/experience-block-variant' ];
+
+/**
+ * Start with a default template of one variant.
+ */
+const TEMPLATE = [
+	[ 'altis/experience-block-variant' ],
+];
+
+// Audience picker input.
+
+const Edit = ( {
+	addVariant,
+	attributes,
+	className,
+	clientId,
+	removeVariant,
+	setAttributes,
+	setVariantAttributes,
+	variants,
+} ) => {
+
+	// Track currently selected variant.
+	const [ activeVariant, setVariant ] = useState( variants[ 0 ].clientId );
+
+	// Track the active variant index to show in the title.
+	const activeVariantIndex = variants.findIndex( variant => variant.clientId === activeVariant );
+
+	// Set clientId attribute if not set.
+	if ( ! attributes.clientId ) {
+		setAttributes( { clientId } );
+		variants.forEach( variant => {
+			setVariantAttributes( variant.clientId, {
+				parentId: clientId,
+			} );
+		} );
+	}
+
+	return (
+		<Fragment>
+			<BlockControls>
+				{ variants.map( ( variant, index ) => {
+					const controls = activeVariant !== variant.clientId
+						? []
+						: [
+							{
+								icon: 'trash',
+								title: __( 'Remove this variant', 'altis-experiments' ),
+								isActive: false,
+								onClick: () => {
+									if ( !window.confirm( __( 'Are you sure you want to remove this variant?', 'altis-experiments' ) ) ) {
+										return;
+									}
+									setVariant( variants[ 0 ].clientId );
+									removeVariant( variant.clientId );
+								},
+							}
+						];
+
+					return (
+						<Toolbar
+							key={ `variant-toolbar-${ variant.clientId }` }
+							className={ `altis-variant-toolbar altis-variant-toolbar--${ activeVariant === variant.clientId ? 'active' : 'inactive' }` }
+							controls={ controls }
+						>
+							<Button
+								isLink
+								onClick={ () => setVariant( variant.clientId ) }
+							>
+								{ `${ __( 'Variant' ) } ${ index + 1 }` }
+							</Button>
+						</Toolbar>
+					);
+				} ) }
+				<Toolbar
+					controls={ [
+						{
+							icon: 'plus',
+							title: __( 'Add a variant', 'altis-experiments' ),
+							isActive: false,
+							onClick: () => {
+								const variantClientId = addVariant();
+								setVariant( variantClientId );
+							},
+						}
+					] }
+				/>
+			</BlockControls>
+			<InspectorControls>
+				{ variants.map( ( variant, index ) => {
+					return (
+						<PanelBody
+							key={ `variant-settings-${ variant.clientId }` }
+							title={ `${ __( 'Variant', 'altis-experiments' ) } ${ index + 1 }` }
+						>
+							<AudiencePicker
+								label={ __( 'Audience' ) }
+								audience={ variant.attributes.audience }
+								onSelect={ audience => {
+									setVariantAttributes( variant.clientId, { audience: audience.id } );
+								} }
+								onClearSelection={ () => {
+									setVariantAttributes( variant.clientId, { audience: null } );
+								} }
+							/>
+						</PanelBody>
+					);
+				} ) }
+			</InspectorControls>
+			<style dangerouslySetInnerHTML={ {
+				__html: `
+					[data-block="${ clientId }"] [data-type="altis/experience-block-variant"] {
+						display: none;
+					}
+					[data-block="${ clientId }"] #block-${ activeVariant } {
+						display: block;
+					}
+				`
+			} } />
+			<div className={ className }>
+				<div className="altis-experience-block-header">
+					{ __( 'Experience Block', 'altis-experiments' ) }
+					{ ' ・ ' }
+					{ __( 'Variant', 'altis-experiments' ) }
+					{ ' ' }
+					{ activeVariantIndex + 1 }
+				</div>
+				<InnerBlocks
+					allowedBlocks={ ALLOWED_BLOCKS }
+					renderAppender={ false }
+					template={ TEMPLATE }
+				/>
+			</div>
+		</Fragment>
+	);
+};
+
+export default compose(
+	withSelect( ( select, ownProps ) => {
+		const { clientId } = ownProps;
+		const { getBlocks } = select( 'core/block-editor' );
+
+		const innerBlocks = getBlocks( clientId );
+
+		return {
+			variants: innerBlocks,
+		};
+	} ),
+	withDispatch( ( dispatch, ownProps, registry ) => {
+		return {
+			addVariant() {
+				const { clientId, attributes } = ownProps;
+				const { replaceInnerBlocks } = dispatch( 'core/block-editor' );
+				const { getBlocks } = registry.select( 'core/block-editor' );
+
+				let innerBlocks = getBlocks( clientId );
+
+				const newVariant = createBlock( 'altis/experience-block-variant', {
+					parentId: attributes.clientId,
+					audience: null,
+				} );
+
+				innerBlocks = [
+					...innerBlocks,
+					newVariant,
+				];
+
+				// Update the inner blocks.
+				replaceInnerBlocks( clientId, innerBlocks );
+
+				// Return new client ID to enable selection.
+				return newVariant.clientId;
+			},
+			removeVariant( variantClientId ) {
+				const { clientId } = ownProps;
+				const { replaceInnerBlocks } = dispatch( 'core/block-editor' );
+				const { getBlocks } = registry.select( 'core/block-editor' );
+
+				let innerBlocks = getBlocks( clientId );
+
+				// Remove inner block by clientId.
+				innerBlocks = innerBlocks.filter( block => block.clientId !== variantClientId );
+
+				// Update the inner blocks.
+				replaceInnerBlocks( clientId, innerBlocks );
+			},
+			setVariantAttributes( variantClientId, attributes ) {
+				const { updateBlockAttributes } = dispatch( 'core/block-editor' );
+				updateBlockAttributes( variantClientId, attributes );
+			}
+		};
+	} )
+)( Edit );
diff --git a/inc/features/blocks/experience/index.js b/inc/features/blocks/experience/index.js
new file mode 100644
index 0000000..4420ef5
--- /dev/null
+++ b/inc/features/blocks/experience/index.js
@@ -0,0 +1,18 @@
+import edit from './edit';
+import save from './save';
+
+import blockData from './block.json';
+
+const { registerBlockType } = wp.blocks;
+const { __ } = wp.i18n;
+
+const settings = {
+	title: __( 'Experience Block', 'altis-experiments' ),
+	description: __( 'Personalised content blocks', 'altis-experiments' ),
+	edit,
+	save,
+	...blockData.settings,
+};
+
+// Register block.
+registerBlockType( blockData.name, settings );
diff --git a/inc/features/blocks/experience/register.php b/inc/features/blocks/experience/register.php
new file mode 100644
index 0000000..bca763c
--- /dev/null
+++ b/inc/features/blocks/experience/register.php
@@ -0,0 +1,81 @@
+<?php
+/**
+ * Experience Block Server Side.
+ *
+ * @phpcs:ignoreFile HM.Files.FunctionFileName.WrongFile
+ */
+
+namespace Altis\Experiments\Features\Blocks\Experience;
+
+use const Altis\Experiments\ROOT_DIR;
+use function Altis\Experiments\Features\Blocks\get_block_settings;
+
+const BLOCK = 'experience';
+
+function setup() {
+	$block_data = get_block_settings( BLOCK );
+
+	// Queue up JS files.
+	add_action( 'enqueue_block_editor_assets', __NAMESPACE__ . '\\enqueue_assets' );
+
+	// Register the block.
+	register_block_type( $block_data['name'], [
+		'attributes' => $block_data['settings']['attributes'],
+		'render_callback' => __NAMESPACE__ . '\\render_block',
+	] );
+}
+
+function enqueue_assets() {
+	wp_enqueue_script(
+		'altis-experiments-features-blocks-experience',
+		plugins_url( 'build/features/blocks/experience.js', ROOT_DIR . '/plugin.php' ),
+		[
+			'wp-plugins',
+			'wp-blocks',
+			'wp-i18n',
+			'wp-editor',
+			'wp-components',
+			'wp-core-data',
+			'wp-edit-post',
+		]
+	);
+
+	// Queue up editor CSS.
+	wp_enqueue_style(
+		'altis-experiments-features-blocks-experience',
+		plugins_url( 'inc/features/blocks/experience/edit.css', ROOT_DIR . '/plugin.php' )
+	);
+}
+
+/**
+ * Render callback for the experience block.
+ *
+ * Because this block only saves <InnerBlocks.Content> on the JS side,
+ * the content string represents only the wrapped inner block markup.
+ *
+ * @param array  $attributes   The block's attributes object.
+ * @param string $innerContent The block's saved content.
+ * @return string The final rendered block markup, as an HTML string.
+ */
+function render_block( array $attributes, ?string $inner_content = '' ) : string {
+	$client_id = $attributes['clientId'] ?? false;
+	$class_name = $attributes['className'] ?? '';
+	$align = $attributes['align'] ?? 'none';
+
+	// Add alignment class.
+	if ( ! empty( $align ) ) {
+		$class_name .= sprintf( 'align%s', $align );
+	}
+
+	if ( ! $client_id ) {
+		trigger_error( 'Experience block has no client ID set.', E_USER_WARNING );
+		return '';
+	}
+
+	return sprintf(
+		'%s<experience-block class="%s" client-id="%s" />',
+		$inner_content,
+		$class_name,
+		$client_id
+	);
+}
diff --git a/inc/features/blocks/experience/save.js b/inc/features/blocks/experience/save.js
new file mode 100644
index 0000000..093745d
--- /dev/null
+++ b/inc/features/blocks/experience/save.js
@@ -0,0 +1,11 @@
+import React from 'react';
+
+const { InnerBlocks } = wp.blockEditor;
+
+const Save = () => {
+	return (
+		<InnerBlocks.Content />
+	);
+}
+
+export default Save;
diff --git a/inc/features/blocks/namespace.php b/inc/features/blocks/namespace.php
new file mode 100644
index 0000000..4b430ca
--- /dev/null
+++ b/inc/features/blocks/namespace.php
@@ -0,0 +1,39 @@
+<?php
+/**
+ * Experience Block functions.
+ */
+
+namespace Altis\Experiments\Features\Blocks;
+
+function setup() {
+	require_once __DIR__ . '/experience/register.php';
+	require_once __DIR__ . '/variant/register.php';
+
+	// Register blocks.
+	Experience\setup();
+	Variant\setup();
+}
+
+function get_block_settings( string $name ) : ?array {
+	$json_path = __DIR__ . '/' . $name . '/block.json';
+
+	// Check name is valid.
+	if ( ! file_exists( $json_path ) ) {
+		trigger_error( 'Error reading %/block.json: file does not exist.', E_USER_WARNING );
+		return null;
+	}
+
+	// phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents
+	$json = file_get_contents( $json_path );
+
+	// Decode the settings.
+	$settings = json_decode( $json, ARRAY_A );
+
+	// Check JSON is valid.
+	if ( json_last_error() ) {
+		trigger_error( sprintf( 'Error decoding %/block.json: %s', $name, json_last_error_msg() ), E_USER_WARNING );
+		return null;
+	}
+
+	return $settings;
+}
diff --git a/inc/features/blocks/variant/block.json b/inc/features/blocks/variant/block.json
new file mode 100644
index 0000000..ed37c18
--- /dev/null
+++ b/inc/features/blocks/variant/block.json
@@ -0,0 +1,22 @@
+{
+    "name": "altis/experience-block-variant",
+    "settings": {
+        "category": "layout",
+        "icon": "lightbulb",
+        "parent": [ "altis/experience-block" ],
+        "supports": {
+            "reusable": false,
+            "html": false,
+            "lightBlockWrapper": true,
+            "inserter": false
+        },
+        "attributes": {
+            "parentId": {
+                "type": "string"
+            },
+            "audience": {
+                "type": "number"
+            }
+        }
+    }
+}
diff --git a/inc/features/blocks/variant/edit.js b/inc/features/blocks/variant/edit.js
new file mode 100644
index 0000000..8665342
--- /dev/null
+++ b/inc/features/blocks/variant/edit.js
@@ -0,0 +1,49 @@
+import React from 'react';
+
+const { InnerBlocks } = wp.blockEditor;
+const { compose } = wp.compose;
+const { withSelect, withDispatch } = wp.data;
+
+const Edit = ( {
+	hasChildBlocks,
+	isSelected,
+	selectParent,
+} ) => {
+	// Autofocus experience block variant parent on select.
+	if ( isSelected ) {
+		selectParent();
+	}
+
+	return (
+		<InnerBlocks
+			renderAppender={
+				hasChildBlocks
+					? undefined
+					: () => <InnerBlocks.ButtonBlockAppender />
+			}
+		/>
+	);
+};
+
+export default compose(
+	withSelect( ( select, ownProps ) => {
+		const { clientId } = ownProps;
+		const { getBlockOrder } = select( 'core/block-editor' )
+
+		return {
+			hasChildBlocks: () => getBlockOrder( clientId ).length > 0,
+		}
+	} ),
+	withDispatch( ( dispatch, ownProps, registry ) => {
+		const { clientId } = ownProps;
+		const { getBlockRootClientId } = registry.select( 'core/block-editor' );
+		const { selectBlock } = dispatch( 'core/block-editor' );
+
+		// Get parent block client ID.
+		const rootClientId = getBlockRootClientId( clientId );
+
+		return {
+			selectParent: () => selectBlock( rootClientId ),
+		};
+	} )
+)( Edit );
diff --git a/inc/features/blocks/variant/index.js b/inc/features/blocks/variant/index.js
new file mode 100644
index 0000000..8109e06
--- /dev/null
+++ b/inc/features/blocks/variant/index.js
@@ -0,0 +1,18 @@
+import edit from './edit';
+import save from './save';
+
+import blockData from './block.json';
+
+const { registerBlockType } = wp.blocks;
+const { __ } = wp.i18n;
+
+const settings = {
+	title: __( 'Experience Block Variant', 'altis-experiments' ),
+	description: __( 'Personalised content block items', 'altis-experiments' ),
+	edit,
+	save,
+	...blockData.settings,
+};
+
+// Register block.
+registerBlockType( blockData.name, settings );
diff --git a/inc/features/blocks/variant/register.php b/inc/features/blocks/variant/register.php
new file mode 100644
index 0000000..3892868
--- /dev/null
+++ b/inc/features/blocks/variant/register.php
@@ -0,0 +1,63 @@
+<?php
+/**
+ * Experience Block Server Side.
+ *
+ * @phpcs:ignoreFile HM.Files.FunctionFileName.WrongFile
+ */
+
+namespace Altis\Experiments\Features\Blocks\Variant;
+
+use const Altis\Experiments\ROOT_DIR;
+use function Altis\Experiments\Features\Blocks\get_block_settings;
+
+const BLOCK = 'variant';
+
+function setup() {
+	$block_data = get_block_settings( BLOCK );
+
+	// Queue up JS files.
+	add_action( 'enqueue_block_editor_assets', __NAMESPACE__ . '\\enqueue_assets' );
+
+	// Register the block.
+	register_block_type( $block_data['name'], [
+		'attributes' => $block_data['settings']['attributes'],
+		'render_callback' => __NAMESPACE__ . '\\render_block',
+	] );
+}
+
+function enqueue_assets() {
+	wp_enqueue_script(
+		'altis-experiments-features-blocks-variant',
+		plugins_url( 'build/features/blocks/variant.js', ROOT_DIR . '/plugin.php' ),
+		[
+			'altis-experiments-features-blocks-experience',
+		]
+	);
+}
+
+/**
+ * Render callback for the experience block.
+ *
+ * Because this block only saves <InnerBlocks.Content> on the JS side,
+ * the content string represents only the wrapped inner block markup.
+ *
+ * @param array  $attributes   The block's attributes object.
+ * @param string $innerContent The block's saved content.
+ * @return string The final rendered block markup, as an HTML string.
+ */
+function render_block( array $attributes, ?string $inner_content = '' ) : string {
+	$parent_id = $attributes['parentId'] ?? false;
+	$audience = $attributes['audience'] ?? 0;
+
+	if ( ! $parent_id ) {
+		trigger_error( 'Experience block variant has no parent ID set.', E_USER_WARNING );
+		return '';
+	}
+
+	return sprintf(
+		'<template data-audience="%d" data-parent-id="%s">%s</template>',
+		$audience,
+		$parent_id,
+		$inner_content
+	);
+}
diff --git a/inc/features/blocks/variant/save.js b/inc/features/blocks/variant/save.js
new file mode 100644
index 0000000..093745d
--- /dev/null
+++ b/inc/features/blocks/variant/save.js
@@ -0,0 +1,11 @@
+import React from 'react';
+
+const { InnerBlocks } = wp.blockEditor;
+
+const Save = () => {
+	return (
+		<InnerBlocks.Content />
+	);
+}
+
+export default Save;
diff --git a/inc/namespace.php b/inc/namespace.php
index 9a0bebc..142886a 100644
--- a/inc/namespace.php
+++ b/inc/namespace.php
@@ -46,6 +46,17 @@ function setup() {
 		require_once ROOT_DIR . '/inc/features/titles/namespace.php';
 		Features\Titles\setup();
 	}
+
+	/**
+	 * Enable Experience Blocks.
+	 *
+	 * @param bool $enabled Whether to enable this feature or not.
+	 */
+	$blocks_feature = apply_filters( 'altis.experiments.features.blocks', true );
+	if ( $blocks_feature ) {
+		require_once ROOT_DIR . '/inc/features/blocks/namespace.php';
+		Features\Blocks\setup();
+	}
 }
 
 /**
diff --git a/package-lock.json b/package-lock.json
index 557f98e..e76661e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "altis-experiments",
-  "version": "2.0.0",
+  "version": "2.0.4",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -1063,9 +1063,9 @@
       }
     },
     "acorn": {
-      "version": "6.2.1",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.2.1.tgz",
-      "integrity": "sha512-JD0xT5FCRDNyjDda3Lrg/IxFscp9q4tiYtxE1/nOzlKCk7hIRuYjhq1kCNkbPjMRMZuFq20HNQn1I9k8Oj0E+Q=="
+      "version": "6.4.1",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.1.tgz",
+      "integrity": "sha512-ZVA9k326Nwrj3Cj9jlh3wGFutC2ZornPNARZwsNYqQYgN0EsV2d53w5RN/co65Ohn4sUAUtb1rSUAOD6XN9idA=="
     },
     "acorn-jsx": {
       "version": "5.0.1",
@@ -1542,15 +1542,16 @@
       "integrity": "sha512-zauLjrfCG+xvoyaqLoV8bLVXXNGC4JqlxFCutSDWA6fJrTo2ZuvLYTqZ7aHBLZSMOopbzwv8f+wZcVzfVTI2Dg=="
     },
     "cacache": {
-      "version": "11.3.3",
-      "resolved": "https://registry.npmjs.org/cacache/-/cacache-11.3.3.tgz",
-      "integrity": "sha512-p8WcneCytvzPxhDvYp31PD039vi77I12W+/KfR9S8AZbaiARFBCpsPJS+9uhWfeBfeAtW7o/4vt3MUqLkbY6nA==",
+      "version": "12.0.4",
+      "resolved": "https://registry.npmjs.org/cacache/-/cacache-12.0.4.tgz",
+      "integrity": "sha512-a0tMB40oefvuInr4Cwb3GerbL9xTj1D5yg0T5xrjGCGyfvbxseIXX7BAO/u/hIXdafzOI5JC3wDwHyf24buOAQ==",
       "requires": {
         "bluebird": "^3.5.5",
         "chownr": "^1.1.1",
         "figgy-pudding": "^3.5.1",
         "glob": "^7.1.4",
         "graceful-fs": "^4.1.15",
+        "infer-owner": "^1.0.3",
         "lru-cache": "^5.1.1",
         "mississippi": "^3.0.0",
         "mkdirp": "^0.5.1",
@@ -1640,9 +1641,9 @@
       }
     },
     "chownr": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npmjs.org/chownr/-/chownr-1.1.2.tgz",
-      "integrity": "sha512-GkfeAQh+QNy3wquu9oIZr6SS5x7wGdSgNQvD10X3r+AZr1Oys22HW8kAmDMvNg2+Dm0TeGaEuO8gFwdBXxwO8A=="
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/chownr/-/chownr-1.1.4.tgz",
+      "integrity": "sha512-jJ0bqzaylmJtVnNgzTeSOs8DPavpbYgEr/b0YL8/2GO3xJEhInFmhKMUnEJQjZumK7KXGFhUy89PrsJWlakBVg=="
     },
     "chrome-trace-event": {
       "version": "1.0.2",
@@ -1682,6 +1683,11 @@
         }
       }
     },
+    "classnames": {
+      "version": "2.2.6",
+      "resolved": "https://registry.npmjs.org/classnames/-/classnames-2.2.6.tgz",
+      "integrity": "sha512-JR/iSQOSt+LQIWwrwEzJ9uk0xfN3mTVYMwt1Ir5mUcSN6pU+V4zQFFaJsclJbPuAUQH+yfWef6tm7l1quW3C8Q=="
+    },
     "cli-cursor": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/cli-cursor/-/cli-cursor-2.1.0.tgz",
@@ -1946,9 +1952,9 @@
       }
     },
     "cyclist": {
-      "version": "0.2.2",
-      "resolved": "https://registry.npmjs.org/cyclist/-/cyclist-0.2.2.tgz",
-      "integrity": "sha1-GzN5LhHpFKL9bW7WRHRkRE5fpkA="
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/cyclist/-/cyclist-1.0.1.tgz",
+      "integrity": "sha1-WW6WmP0MgOEgOMK4LW6xs1tiJNk="
     },
     "date-now": {
       "version": "0.1.4",
@@ -2072,6 +2078,11 @@
         "esutils": "^2.0.2"
       }
     },
+    "dom-scroll-into-view": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/dom-scroll-into-view/-/dom-scroll-into-view-2.0.1.tgz",
+      "integrity": "sha512-bvVTQe1lfaUr1oFzZX80ce9KLDlZ3iU+XGNE/bz9HnGdklTieqsbmsLHe+rT2XWqopvL0PckkYqN7ksmm5pe3w=="
+    },
     "domain-browser": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/domain-browser/-/domain-browser-1.2.0.tgz",
@@ -2556,9 +2567,9 @@
       "dev": true
     },
     "figgy-pudding": {
-      "version": "3.5.1",
-      "resolved": "https://registry.npmjs.org/figgy-pudding/-/figgy-pudding-3.5.1.tgz",
-      "integrity": "sha512-vNKxJHTEKNThjfrdJwHc7brvM6eVevuO5nTj6ez8ZQ1qbXTvGthucRF7S4vf2cr71QVnT70V34v0S1DyQsti0w=="
+      "version": "3.5.2",
+      "resolved": "https://registry.npmjs.org/figgy-pudding/-/figgy-pudding-3.5.2.tgz",
+      "integrity": "sha512-0btnI/H8f2pavGMN8w40mlSKOfTK2SVJmBfBeVIj3kNw0swwgzyRq0d5TJVOwodFmtvpPeWPN/MCcfuWF0Ezbw=="
     },
     "figures": {
       "version": "2.0.0",
@@ -3486,6 +3497,11 @@
       "resolved": "https://registry.npmjs.org/imurmurhash/-/imurmurhash-0.1.4.tgz",
       "integrity": "sha1-khi5srkoojixPcT7a21XbyMUU+o="
     },
+    "infer-owner": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/infer-owner/-/infer-owner-1.0.4.tgz",
+      "integrity": "sha512-IClj+Xz94+d7irH5qRyfJonOdfTzuDaifE6ZPWfx0N0+/ATZCbuTPq2prFl526urkQd90WyUKIh1DfBQ2hMz9A=="
+    },
     "inflight": {
       "version": "1.0.6",
       "resolved": "https://registry.npmjs.org/inflight/-/inflight-1.0.6.tgz",
@@ -3760,9 +3776,9 @@
       }
     },
     "kind-of": {
-      "version": "6.0.2",
-      "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-6.0.2.tgz",
-      "integrity": "sha512-s5kLOcnH0XqDO+FvuaLX8DDjZ18CGFk7VygH40QoKPUQhW4e2rvM0rwUq0t8IQDOwYSeLK01U90OjzBTme2QqA=="
+      "version": "6.0.3",
+      "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-6.0.3.tgz",
+      "integrity": "sha512-dcS1ul+9tmeD95T+x28/ehLgd9mENa3LsvDTtzm3vyBEO7RPptvAD+t44WVXaUjTBRcrpFeFlC8WCruUR456hw=="
     },
     "lcid": {
       "version": "2.0.0",
@@ -4008,9 +4024,9 @@
       }
     },
     "minimist": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
-      "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ="
+      "version": "1.2.5",
+      "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
+      "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw=="
     },
     "mississippi": {
       "version": "3.0.0",
@@ -4049,18 +4065,11 @@
       }
     },
     "mkdirp": {
-      "version": "0.5.1",
-      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
-      "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
+      "version": "0.5.5",
+      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.5.tgz",
+      "integrity": "sha512-NKmAlESf6jMGym1++R0Ra7wvhV+wFW63FaSOFPwRahvea0gMUcGUhVeAg/0BC0wiv9ih5NYPB1Wn1UEI1/L+xQ==",
       "requires": {
-        "minimist": "0.0.8"
-      },
-      "dependencies": {
-        "minimist": {
-          "version": "0.0.8",
-          "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz",
-          "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0="
-        }
+        "minimist": "^1.2.5"
       }
     },
     "move-concurrently": {
@@ -4372,11 +4381,11 @@
       "integrity": "sha512-0DTvPVU3ed8+HNXOu5Bs+o//Mbdj9VNQMUOe9oKCwh8l0GNwpTDMKCWbRjgtD291AWnkAgkqA/LOnQS8AmS1tw=="
     },
     "parallel-transform": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/parallel-transform/-/parallel-transform-1.1.0.tgz",
-      "integrity": "sha1-1BDwZbBdojCB/NEPKIVMKb2jOwY=",
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/parallel-transform/-/parallel-transform-1.2.0.tgz",
+      "integrity": "sha512-P2vSmIu38uIlvdcU7fDkyrxj33gTUy/ABO5ZUbGowxNCopBq/OoD42bP4UmMrJoPyk4Uqf0mu3mtWBhHCZD8yg==",
       "requires": {
-        "cyclist": "~0.2.2",
+        "cyclist": "^1.0.1",
         "inherits": "^2.0.3",
         "readable-stream": "^2.1.5"
       }
@@ -4962,9 +4971,9 @@
       }
     },
     "serialize-javascript": {
-      "version": "1.7.0",
-      "resolved": "https://registry.npmjs.org/serialize-javascript/-/serialize-javascript-1.7.0.tgz",
-      "integrity": "sha512-ke8UG8ulpFOxO8f8gRYabHQe/ZntKlcig2Mp+8+URDP1D8vJZ0KUt7LYo07q25Z/+JVSgpr/cui9PIp5H6/+nA=="
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/serialize-javascript/-/serialize-javascript-2.1.2.tgz",
+      "integrity": "sha512-rs9OggEUF0V4jUSecXazOYsLfu7OGK2qIn3c7IPBiffz32XniEp/TX9Xmc9LQfK2nQ2QKHvZ2oygKUGU0lG4jQ=="
     },
     "serve-static": {
       "version": "1.14.1",
@@ -5189,9 +5198,9 @@
       }
     },
     "source-map-support": {
-      "version": "0.5.12",
-      "resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.12.tgz",
-      "integrity": "sha512-4h2Pbvyy15EE02G+JOZpUCmqWJuqrs+sEkzewTm++BPi7Hvn/HwcqLAcNxYAyI0x13CpPPn+kMjl+hplXMHITQ==",
+      "version": "0.5.19",
+      "resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.19.tgz",
+      "integrity": "sha512-Wonm7zOCIJzBGQdB+thsPar0kYuCIzYvxZwlBa87yi/Mdjv7Tip2cyVbLj5o0cFPN4EVkuTwb3GDDyUx2DGnGw==",
       "requires": {
         "buffer-from": "^1.0.0",
         "source-map": "^0.6.0"
@@ -5286,9 +5295,9 @@
       }
     },
     "stream-shift": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/stream-shift/-/stream-shift-1.0.0.tgz",
-      "integrity": "sha1-1cdSgl5TZ+eG944Y5EXqIjoVWVI="
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/stream-shift/-/stream-shift-1.0.1.tgz",
+      "integrity": "sha512-AiisoFqQ0vbGcZgQPY1cdP2I76glaVA/RauYR4G4thNFgkTqr90yXTo4LYX60Jl+sIlPNHHdGSwo01AvbKUSVQ=="
     },
     "string-width": {
       "version": "2.1.1",
@@ -5414,9 +5423,9 @@
       "integrity": "sha512-4WK/bYZmj8xLr+HUCODHGF1ZFzsYffasLUgEiMBY4fgtltdO6B4WJtlSbPaDTLpYTcGVwM2qLnFTICEcNxs3kA=="
     },
     "terser": {
-      "version": "4.1.2",
-      "resolved": "https://registry.npmjs.org/terser/-/terser-4.1.2.tgz",
-      "integrity": "sha512-jvNoEQSPXJdssFwqPSgWjsOrb+ELoE+ILpHPKXC83tIxOlh2U75F1KuB2luLD/3a6/7K3Vw5pDn+hvu0C4AzSw==",
+      "version": "4.6.13",
+      "resolved": "https://registry.npmjs.org/terser/-/terser-4.6.13.tgz",
+      "integrity": "sha512-wMvqukYgVpQlymbnNbabVZbtM6PN63AzqexpwJL8tbh/mRT9LE5o+ruVduAGL7D6Fpjl+Q+06U5I9Ul82odAhw==",
       "requires": {
         "commander": "^2.20.0",
         "source-map": "~0.6.1",
@@ -5431,19 +5440,18 @@
       }
     },
     "terser-webpack-plugin": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/terser-webpack-plugin/-/terser-webpack-plugin-1.3.0.tgz",
-      "integrity": "sha512-W2YWmxPjjkUcOWa4pBEv4OP4er1aeQJlSo2UhtCFQCuRXEHjOFscO8VyWHj9JLlA0RzQb8Y2/Ta78XZvT54uGg==",
+      "version": "1.4.3",
+      "resolved": "https://registry.npmjs.org/terser-webpack-plugin/-/terser-webpack-plugin-1.4.3.tgz",
+      "integrity": "sha512-QMxecFz/gHQwteWwSo5nTc6UaICqN1bMedC5sMtUc7y3Ha3Q8y6ZO0iCR8pq4RJC8Hjf0FEPEHZqcMB/+DFCrA==",
       "requires": {
-        "cacache": "^11.3.2",
-        "find-cache-dir": "^2.0.0",
+        "cacache": "^12.0.2",
+        "find-cache-dir": "^2.1.0",
         "is-wsl": "^1.1.0",
-        "loader-utils": "^1.2.3",
         "schema-utils": "^1.0.0",
-        "serialize-javascript": "^1.7.0",
+        "serialize-javascript": "^2.1.2",
         "source-map": "^0.6.1",
-        "terser": "^4.0.0",
-        "webpack-sources": "^1.3.0",
+        "terser": "^4.1.2",
+        "webpack-sources": "^1.4.0",
         "worker-farm": "^1.7.0"
       },
       "dependencies": {
@@ -5451,6 +5459,15 @@
           "version": "0.6.1",
           "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
           "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g=="
+        },
+        "webpack-sources": {
+          "version": "1.4.3",
+          "resolved": "https://registry.npmjs.org/webpack-sources/-/webpack-sources-1.4.3.tgz",
+          "integrity": "sha512-lgTS3Xhv1lCOKo7SA5TjKXMjpSM4sBjNV5+q2bqesbSPs5FjGmU6jjtBSkX9b4qW87vDIsCIlUPOEhbZrMdjeQ==",
+          "requires": {
+            "source-list-map": "^2.0.0",
+            "source-map": "~0.6.1"
+          }
         }
       }
     },
@@ -5956,9 +5973,9 @@
       "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w=="
     },
     "yallist": {
-      "version": "3.0.3",
-      "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.0.3.tgz",
-      "integrity": "sha512-S+Zk8DEWE6oKpV+vI3qWkaK+jSbIK86pCwe2IF/xwIpQ8jEuxpw9NyaGjmp9+BoJv5FV2piqCDcoCtStppiq2A=="
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz",
+      "integrity": "sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g=="
     },
     "yargs": {
       "version": "13.2.4",
@@ -5991,9 +6008,9 @@
       }
     },
     "yargs-parser": {
-      "version": "13.1.1",
-      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-13.1.1.tgz",
-      "integrity": "sha512-oVAVsHz6uFrg3XQheFII8ESO2ssAf9luWuAd6Wexsu4F3OtIW0o8IribPXYrD4WC24LWtPrJlGy87y5udK+dxQ==",
+      "version": "13.1.2",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-13.1.2.tgz",
+      "integrity": "sha512-3lbsNRf/j+A4QuSZfDRA7HRSfWrzO0YjqTJd5kjAq37Zep1CEgaYmrH9Q3GwPiB9cHyd1Y1UwggGhJGoxipbzg==",
       "requires": {
         "camelcase": "^5.0.0",
         "decamelize": "^1.2.0"
diff --git a/package.json b/package.json
index 01c317a..3b7a825 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,9 @@
     "@babel/runtime": "^7.4.5",
     "@wordpress/babel-preset-default": "^4.3.0",
     "babel-loader": "^8.0.6",
+    "classnames": "^2.2.6",
     "deepmerge": "^4.0.0",
+    "dom-scroll-into-view": "^2.0.1",
     "styled-components": "^4.3.2",
     "webpack": "^4.35.0",
     "webpack-bundle-analyzer": "^3.3.2",
diff --git a/src/experiments.js b/src/experiments.js
index 1da6f67..deb78ab 100644
--- a/src/experiments.js
+++ b/src/experiments.js
@@ -226,8 +226,66 @@ Test.registerGoal( 'click', ( element, record ) => {
 	} );
 }, [ 'a' ] );
 
+class ExperienceBlock extends HTMLElement {
+
+	exprience = null;
+
+	get clientId() {
+		return this.getAttribute( 'client-id' );
+	}
+
+	constructor() {
+		super();
+	}
+
+	connectedCallback() {
+		// Set default styles.
+		this.attachShadow( { mode: 'open' } );
+		this.shadowRoot.innerHTML = `
+			<style>
+				:host {
+					display: block;
+				}
+			</style>
+			<slot></slot>
+		`;
+
+		// Update the component content.
+		this.setContent();
+
+		// Attach a listener to update the content when audiences are changed.
+		window.Altis.Analytics.on( 'updateAudiences', this.setContent );
+	}
+
+	setContent() {
+		const audiences = window.Altis.Analytics.getAudiences();
+
+		// Get associated templates.
+		const templates = document.querySelectorAll( `template[data-parent-id="${ this.clientId }"]` );
+
+		// Find a matching template.
+		for ( const index in templates ) {
+			const template = templates[ index ];
+			if ( audiences.indexOf( Number( template.dataset.audience ) ) >= 0 ) {
+				const experience = template.content.cloneNode( true );
+				if ( this.experience ) {
+					this.replaceChild( experience, this.experience );
+				} else {
+					this.appendChild( experience );
+				}
+
+				// Keep a reference ot the node for easier replacement later.
+				this.experience = experience;
+				break;
+			}
+		}
+	}
+
+}
+
 // Define custom elements.
 window.customElements.define( 'ab-test', ABTest );
+window.customElements.define( 'experience-block', ExperienceBlock );
 
 // Expose ABTest methods.
 window.Altis.Analytics.Experiments = Object.assign( {}, window.Altis.Analytics.Experiments || {}, {
diff --git a/webpack.config.js b/webpack.config.js
index c225edd..f1540a2 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -8,6 +8,8 @@ const sharedConfig = {
 	mode: mode,
 	entry: {
 		'features/titles': path.resolve( __dirname, 'src/features/titles/index.js' ),
+		'features/blocks/experience': path.resolve( __dirname, 'inc/features/blocks/experience/index.js' ),
+		'features/blocks/variant': path.resolve( __dirname, 'inc/features/blocks/variant/index.js' ),
 		experiments: path.resolve( __dirname, 'src/experiments.js' ),
 	},
 	output: {

From ad4bf72b675ffa2968507b5950b46faa80f09dbe Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Tue, 12 May 2020 09:58:54 +0100
Subject: [PATCH 02/41] add eslint and fix code style issues

---
 .eslintrc                                     |   12 +
 .../experience/components/AudiencePicker.js   |    6 +-
 .../blocks/experience/components/URLInput.js  |  102 +-
 inc/features/blocks/experience/edit.js        |   12 +-
 inc/features/blocks/experience/save.js        |    2 +-
 inc/features/blocks/variant/edit.js           |    6 +-
 inc/features/blocks/variant/save.js           |    2 +-
 package-lock.json                             | 4425 ++++++++++-------
 package.json                                  |   44 +-
 src/experiments.js                            |    8 -
 src/features/titles/components/duration.js    |    4 +-
 .../titles/components/field-date-range.js     |    3 +-
 .../titles/components/field-title-text.js     |    5 +-
 .../components/field-traffic-percentage.js    |    3 +-
 src/features/titles/components/index.js       |    1 -
 src/features/titles/components/panel-row.js   |    1 -
 src/features/titles/components/plugin-icon.js |    1 -
 src/features/titles/data/with-test-data.js    |    5 +-
 src/features/titles/index.js                  |    1 -
 src/features/titles/plugin.js                 |    1 -
 src/features/titles/results.js                |    5 +-
 src/features/titles/settings.js               |    1 -
 src/features/titles/utils/index.js            |    2 -
 23 files changed, 2869 insertions(+), 1783 deletions(-)
 create mode 100644 .eslintrc

diff --git a/.eslintrc b/.eslintrc
new file mode 100644
index 0000000..8f9206d
--- /dev/null
+++ b/.eslintrc
@@ -0,0 +1,12 @@
+{
+	"extends": "humanmade",
+	"globals": {
+		"Altis": "readonly",
+		"wp": "readonly",
+		"moment": "readonly"
+	},
+	"rules": {
+		"no-multi-str": "off",
+		"no-console": "off"
+	}
+}
diff --git a/inc/features/blocks/experience/components/AudiencePicker.js b/inc/features/blocks/experience/components/AudiencePicker.js
index bbd9a22..a506288 100644
--- a/inc/features/blocks/experience/components/AudiencePicker.js
+++ b/inc/features/blocks/experience/components/AudiencePicker.js
@@ -41,7 +41,7 @@ const fetchSuggestions = async ( search, { perPage = 20 } = {} ) => {
  */
 const fetchAudience = async ( id, callback ) => {
 	const post = await apiFetch( {
-		path: `/wp/v2/audiences/${ id }`
+		path: `/wp/v2/audiences/${ id }`,
 	} );
 
 	const audience = {
@@ -55,7 +55,7 @@ const fetchAudience = async ( id, callback ) => {
 	callback && callback( audience );
 
 	return audience;
-}
+};
 
 const AudiencePicker = props => {
 	const [ value, setValue ] = useState( '' );
@@ -126,6 +126,6 @@ const AudiencePicker = props => {
 			) }
 		</URLInput>
 	);
-}
+};
 
 export default AudiencePicker;
diff --git a/inc/features/blocks/experience/components/URLInput.js b/inc/features/blocks/experience/components/URLInput.js
index 80d82f8..fe47dae 100644
--- a/inc/features/blocks/experience/components/URLInput.js
+++ b/inc/features/blocks/experience/components/URLInput.js
@@ -1,11 +1,11 @@
 import React from 'react';
+import classnames from 'classnames';
+import scrollIntoView from 'dom-scroll-into-view';
 
 /**
  * External dependencies
  */
 const { throttle, isFunction } = window._;
-import classnames from 'classnames';
-import scrollIntoView from 'dom-scroll-into-view';
 
 /**
  * WordPress dependencies
@@ -27,7 +27,7 @@ const { isURL } = wp.url;
 // Since URLInput is rendered in the context of other inputs, but should be
 // considered a separate modal node, prevent keyboard events from propagating
 // as being considered from the input.
-const stopEventPropagation = ( event ) => event.stopPropagation();
+const stopEventPropagation = event => event.stopPropagation();
 
 class URLInput extends Component {
 	constructor( props ) {
@@ -43,7 +43,7 @@ class URLInput extends Component {
 		this.inputRef = createRef();
 		this.updateSuggestions = throttle(
 			this.updateSuggestions.bind( this ),
-			200
+			200,
 		);
 
 		this.suggestionNodes = [];
@@ -75,7 +75,7 @@ class URLInput extends Component {
 				this.autocompleteRef.current,
 				{
 					onlyScrollIfNeeded: true,
-				}
+				},
 			);
 
 			this.props.setTimeout( () => {
@@ -103,7 +103,7 @@ class URLInput extends Component {
 	}
 
 	bindSuggestionNode( index ) {
-		return ( ref ) => {
+		return ref => {
 			this.suggestionNodes[ index ] = ref;
 		};
 	}
@@ -164,7 +164,7 @@ class URLInput extends Component {
 		} );
 
 		request
-			.then( ( suggestions ) => {
+			.then( suggestions => {
 				// A fetch Promise doesn't have an abort option. It's mimicked by
 				// comparing the request reference in on the instance, which is
 				// reset or deleted on subsequent requests or unmounting.
@@ -177,23 +177,23 @@ class URLInput extends Component {
 					loading: false,
 				} );
 
-				if ( !! suggestions.length ) {
+				if ( suggestions.length ) {
 					this.props.debouncedSpeak(
 						sprintf(
 							/* translators: %s: number of results. */
 							_n(
 								'%d result found, use up and down arrow keys to navigate.',
 								'%d results found, use up and down arrow keys to navigate.',
-								suggestions.length
+								suggestions.length,
 							),
-							suggestions.length
+							suggestions.length,
 						),
-						'assertive'
+						'assertive',
 					);
 				} else {
 					this.props.debouncedSpeak(
 						__( 'No results.' ),
-						'assertive'
+						'assertive',
 					);
 				}
 				this.isUpdatingSuggestions = false;
@@ -258,7 +258,7 @@ class URLInput extends Component {
 				// When UP is pressed, if the caret is at the start of the text, move it to the 0
 				// position.
 				case UP: {
-					if ( 0 !== event.target.selectionStart ) {
+					if ( event.target.selectionStart !== 0 ) {
 						event.stopPropagation();
 						event.preventDefault();
 
@@ -279,11 +279,12 @@ class URLInput extends Component {
 						// Set the input caret to the last position
 						event.target.setSelectionRange(
 							this.props.value.length,
-							this.props.value.length
+							this.props.value.length,
 						);
 					}
 					break;
 				}
+				// no default
 			}
 
 			return;
@@ -333,6 +334,7 @@ class URLInput extends Component {
 				}
 				break;
 			}
+			// no default
 		}
 	}
 
@@ -356,7 +358,7 @@ class URLInput extends Component {
 			disableSuggestions,
 			__experimentalShowInitialSuggestions = false,
 		},
-		{ showSuggestions }
+		{ showSuggestions },
 	) {
 		let shouldShowSuggestions = showSuggestions;
 
@@ -441,6 +443,7 @@ class URLInput extends Component {
 					placeholder={ placeholder }
 					onKeyDown={ this.onKeyDown }
 					role="combobox"
+					aria-controls={ suggestionsListboxId }
 					aria-expanded={ showSuggestions }
 					aria-autocomplete="list"
 					aria-owns={ suggestionsListboxId }
@@ -472,43 +475,42 @@ class URLInput extends Component {
 				{ ! isFunction( renderSuggestions ) &&
 					showSuggestions &&
 					!! suggestions.length && (
-						<Popover
-							position="bottom"
-							noArrow
-							focusOnMount={ false }
+					<Popover
+						position="bottom"
+						noArrow
+						focusOnMount={ false }
+					>
+						<div
+							{ ...suggestionsListProps }
+							className={ classnames(
+								'block-editor-url-input__suggestions',
+								`${ className }__suggestions`,
+							) }
 						>
-							<div
-								{ ...suggestionsListProps }
-								className={ classnames(
-									'block-editor-url-input__suggestions',
-									`${ className }__suggestions`
-								) }
-							>
-								{ suggestions.map( ( suggestion, index ) => (
-									<Button
-										{ ...buildSuggestionItemProps(
-											suggestion,
-											index
-										) }
-										key={ suggestion.id }
-										className={ classnames(
-											'block-editor-url-input__suggestion',
-											{
-												'is-selected':
+							{ suggestions.map( ( suggestion, index ) => (
+								<Button
+									{ ...buildSuggestionItemProps(
+										suggestion,
+										index,
+									) }
+									key={ suggestion.id }
+									className={ classnames(
+										'block-editor-url-input__suggestion',
+										{
+											'is-selected':
 													index ===
 													selectedSuggestion,
-											}
-										) }
-										onClick={ () =>
-											this.handleOnClick( suggestion )
-										}
-									>
-										{ suggestion.title }
-									</Button>
-								) ) }
-							</div>
-						</Popover>
-					) }
+										},
+									) }
+									onClick={ () =>
+										this.handleOnClick( suggestion ) }
+								>
+									{ suggestion.title }
+								</Button>
+							) ) }
+						</div>
+					</Popover>
+				) }
 
 				{ children }
 			</BaseControl>
@@ -535,5 +537,5 @@ export default compose(
 			__experimentalFetchLinkSuggestions: getSettings()
 				.__experimentalFetchLinkSuggestions,
 		};
-	} )
+	} ),
 )( URLInput );
diff --git a/inc/features/blocks/experience/edit.js b/inc/features/blocks/experience/edit.js
index 6e385e3..ecd6f1d 100644
--- a/inc/features/blocks/experience/edit.js
+++ b/inc/features/blocks/experience/edit.js
@@ -71,13 +71,13 @@ const Edit = ( {
 								title: __( 'Remove this variant', 'altis-experiments' ),
 								isActive: false,
 								onClick: () => {
-									if ( !window.confirm( __( 'Are you sure you want to remove this variant?', 'altis-experiments' ) ) ) {
+									if ( ! window.confirm( __( 'Are you sure you want to remove this variant?', 'altis-experiments' ) ) ) {
 										return;
 									}
 									setVariant( variants[ 0 ].clientId );
 									removeVariant( variant.clientId );
 								},
-							}
+							},
 						];
 
 					return (
@@ -105,7 +105,7 @@ const Edit = ( {
 								const variantClientId = addVariant();
 								setVariant( variantClientId );
 							},
-						}
+						},
 					] }
 				/>
 			</BlockControls>
@@ -138,7 +138,7 @@ const Edit = ( {
 					[data-block="${ clientId }"] #block-${ activeVariant } {
 						display: block;
 					}
-				`
+				`,
 			} } />
 			<div className={ className }>
 				<div className="altis-experience-block-header">
@@ -210,7 +210,7 @@ export default compose(
 			setVariantAttributes( variantClientId, attributes ) {
 				const { updateBlockAttributes } = dispatch( 'core/block-editor' );
 				updateBlockAttributes( variantClientId, attributes );
-			}
+			},
 		};
-	} )
+	} ),
 )( Edit );
diff --git a/inc/features/blocks/experience/save.js b/inc/features/blocks/experience/save.js
index 093745d..015a746 100644
--- a/inc/features/blocks/experience/save.js
+++ b/inc/features/blocks/experience/save.js
@@ -6,6 +6,6 @@ const Save = () => {
 	return (
 		<InnerBlocks.Content />
 	);
-}
+};
 
 export default Save;
diff --git a/inc/features/blocks/variant/edit.js b/inc/features/blocks/variant/edit.js
index 8665342..bf8f325 100644
--- a/inc/features/blocks/variant/edit.js
+++ b/inc/features/blocks/variant/edit.js
@@ -28,11 +28,11 @@ const Edit = ( {
 export default compose(
 	withSelect( ( select, ownProps ) => {
 		const { clientId } = ownProps;
-		const { getBlockOrder } = select( 'core/block-editor' )
+		const { getBlockOrder } = select( 'core/block-editor' );
 
 		return {
 			hasChildBlocks: () => getBlockOrder( clientId ).length > 0,
-		}
+		};
 	} ),
 	withDispatch( ( dispatch, ownProps, registry ) => {
 		const { clientId } = ownProps;
@@ -45,5 +45,5 @@ export default compose(
 		return {
 			selectParent: () => selectBlock( rootClientId ),
 		};
-	} )
+	} ),
 )( Edit );
diff --git a/inc/features/blocks/variant/save.js b/inc/features/blocks/variant/save.js
index 093745d..015a746 100644
--- a/inc/features/blocks/variant/save.js
+++ b/inc/features/blocks/variant/save.js
@@ -6,6 +6,6 @@ const Save = () => {
 	return (
 		<InnerBlocks.Content />
 	);
-}
+};
 
 export default Save;
diff --git a/package-lock.json b/package-lock.json
index e76661e..6999d4a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5,272 +5,340 @@
   "requires": true,
   "dependencies": {
     "@babel/cli": {
-      "version": "7.5.5",
-      "resolved": "https://registry.npmjs.org/@babel/cli/-/cli-7.5.5.tgz",
-      "integrity": "sha512-UHI+7pHv/tk9g6WXQKYz+kmXTI77YtuY3vqC59KIqcoWEjsJJSG6rAxKaLsgj3LDyadsPrCB929gVOKM6Hui0w==",
+      "version": "7.8.4",
+      "resolved": "https://registry.npmjs.org/@babel/cli/-/cli-7.8.4.tgz",
+      "integrity": "sha512-XXLgAm6LBbaNxaGhMAznXXaxtCWfuv6PIDJ9Alsy9JYTOh+j2jJz+L/162kkfU1j/pTSxK1xGmlwI4pdIMkoag==",
       "requires": {
-        "chokidar": "^2.0.4",
-        "commander": "^2.8.1",
+        "chokidar": "^2.1.8",
+        "commander": "^4.0.1",
         "convert-source-map": "^1.1.0",
         "fs-readdir-recursive": "^1.1.0",
         "glob": "^7.0.0",
         "lodash": "^4.17.13",
-        "mkdirp": "^0.5.1",
-        "output-file-sync": "^2.0.0",
+        "make-dir": "^2.1.0",
         "slash": "^2.0.0",
         "source-map": "^0.5.0"
+      },
+      "dependencies": {
+        "commander": {
+          "version": "4.1.1",
+          "resolved": "https://registry.npmjs.org/commander/-/commander-4.1.1.tgz",
+          "integrity": "sha512-NOKm8xhkzAjzFx8B2v5OAHT+u5pRQc2UCa2Vq9jYL/31o2wi9mxBA7LIFs3sV5VSC49z6pEhfbMULvShKj26WA=="
+        }
       }
     },
     "@babel/code-frame": {
       "version": "7.5.5",
       "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.5.5.tgz",
       "integrity": "sha512-27d4lZoomVyo51VegxI20xZPuSHusqbQag/ztrBC7wegWoQ1nLREPVSKSW8byhTlzTKyNE4ifaTA6lCp7JjpFw==",
+      "dev": true,
       "requires": {
         "@babel/highlight": "^7.0.0"
       }
     },
+    "@babel/compat-data": {
+      "version": "7.9.6",
+      "resolved": "https://registry.npmjs.org/@babel/compat-data/-/compat-data-7.9.6.tgz",
+      "integrity": "sha512-5QPTrNen2bm7RBc7dsOmcA5hbrS4O2Vhmk5XOL4zWW/zD/hV0iinpefDlkm+tBBy8kDtFaaeEvmAqt+nURAV2g==",
+      "requires": {
+        "browserslist": "^4.11.1",
+        "invariant": "^2.2.4",
+        "semver": "^5.5.0"
+      }
+    },
     "@babel/core": {
-      "version": "7.5.5",
-      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.5.5.tgz",
-      "integrity": "sha512-i4qoSr2KTtce0DmkuuQBV4AuQgGPUcPXMr9L5MyYAtk06z068lQ10a4O009fe5OB/DfNV+h+qqT7ddNV8UnRjg==",
-      "requires": {
-        "@babel/code-frame": "^7.5.5",
-        "@babel/generator": "^7.5.5",
-        "@babel/helpers": "^7.5.5",
-        "@babel/parser": "^7.5.5",
-        "@babel/template": "^7.4.4",
-        "@babel/traverse": "^7.5.5",
-        "@babel/types": "^7.5.5",
-        "convert-source-map": "^1.1.0",
+      "version": "7.9.6",
+      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.9.6.tgz",
+      "integrity": "sha512-nD3deLvbsApbHAHttzIssYqgb883yU/d9roe4RZymBCDaZryMJDbptVpEpeQuRh4BJ+SYI8le9YGxKvFEvl1Wg==",
+      "requires": {
+        "@babel/code-frame": "^7.8.3",
+        "@babel/generator": "^7.9.6",
+        "@babel/helper-module-transforms": "^7.9.0",
+        "@babel/helpers": "^7.9.6",
+        "@babel/parser": "^7.9.6",
+        "@babel/template": "^7.8.6",
+        "@babel/traverse": "^7.9.6",
+        "@babel/types": "^7.9.6",
+        "convert-source-map": "^1.7.0",
         "debug": "^4.1.0",
-        "json5": "^2.1.0",
+        "gensync": "^1.0.0-beta.1",
+        "json5": "^2.1.2",
         "lodash": "^4.17.13",
         "resolve": "^1.3.2",
         "semver": "^5.4.1",
         "source-map": "^0.5.0"
+      },
+      "dependencies": {
+        "@babel/code-frame": {
+          "version": "7.8.3",
+          "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.8.3.tgz",
+          "integrity": "sha512-a9gxpmdXtZEInkCSHUJDLHZVBgb1QS0jhss4cPP93EW7s+uC5bikET2twEF3KV+7rDblJcmNvTR7VJejqd2C2g==",
+          "requires": {
+            "@babel/highlight": "^7.8.3"
+          }
+        },
+        "@babel/highlight": {
+          "version": "7.9.0",
+          "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.9.0.tgz",
+          "integrity": "sha512-lJZPilxX7Op3Nv/2cvFdnlepPXDxi29wxteT57Q965oc5R9v86ztx0jfxVrTcBk8C2kcPkkDa2Z4T3ZsPPVWsQ==",
+          "requires": {
+            "@babel/helper-validator-identifier": "^7.9.0",
+            "chalk": "^2.0.0",
+            "js-tokens": "^4.0.0"
+          }
+        }
       }
     },
     "@babel/generator": {
-      "version": "7.5.5",
-      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.5.5.tgz",
-      "integrity": "sha512-ETI/4vyTSxTzGnU2c49XHv2zhExkv9JHLTwDAFz85kmcwuShvYG2H08FwgIguQf4JC75CBnXAUM5PqeF4fj0nQ==",
+      "version": "7.9.6",
+      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.9.6.tgz",
+      "integrity": "sha512-+htwWKJbH2bL72HRluF8zumBxzuX0ZZUFl3JLNyoUjM/Ho8wnVpPXM6aUz8cfKDqQ/h7zHqKt4xzJteUosckqQ==",
       "requires": {
-        "@babel/types": "^7.5.5",
+        "@babel/types": "^7.9.6",
         "jsesc": "^2.5.1",
         "lodash": "^4.17.13",
-        "source-map": "^0.5.0",
-        "trim-right": "^1.0.1"
+        "source-map": "^0.5.0"
       }
     },
     "@babel/helper-annotate-as-pure": {
-      "version": "7.0.0",
-      "resolved": "https://registry.npmjs.org/@babel/helper-annotate-as-pure/-/helper-annotate-as-pure-7.0.0.tgz",
-      "integrity": "sha512-3UYcJUj9kvSLbLbUIfQTqzcy5VX7GRZ/CCDrnOaZorFFM01aXp1+GJwuFGV4NDDoAS+mOUyHcO6UD/RfqOks3Q==",
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-annotate-as-pure/-/helper-annotate-as-pure-7.8.3.tgz",
+      "integrity": "sha512-6o+mJrZBxOoEX77Ezv9zwW7WV8DdluouRKNY/IR5u/YTMuKHgugHOzYWlYvYLpLA9nPsQCAAASpCIbjI9Mv+Uw==",
       "requires": {
-        "@babel/types": "^7.0.0"
+        "@babel/types": "^7.8.3"
       }
     },
     "@babel/helper-builder-binary-assignment-operator-visitor": {
-      "version": "7.1.0",
-      "resolved": "https://registry.npmjs.org/@babel/helper-builder-binary-assignment-operator-visitor/-/helper-builder-binary-assignment-operator-visitor-7.1.0.tgz",
-      "integrity": "sha512-qNSR4jrmJ8M1VMM9tibvyRAHXQs2PmaksQF7c1CGJNipfe3D8p+wgNwgso/P2A2r2mdgBWAXljNWR0QRZAMW8w==",
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-builder-binary-assignment-operator-visitor/-/helper-builder-binary-assignment-operator-visitor-7.8.3.tgz",
+      "integrity": "sha512-5eFOm2SyFPK4Rh3XMMRDjN7lBH0orh3ss0g3rTYZnBQ+r6YPj7lgDyCvPphynHvUrobJmeMignBr6Acw9mAPlw==",
       "requires": {
-        "@babel/helper-explode-assignable-expression": "^7.1.0",
-        "@babel/types": "^7.0.0"
+        "@babel/helper-explode-assignable-expression": "^7.8.3",
+        "@babel/types": "^7.8.3"
       }
     },
     "@babel/helper-builder-react-jsx": {
-      "version": "7.3.0",
-      "resolved": "https://registry.npmjs.org/@babel/helper-builder-react-jsx/-/helper-builder-react-jsx-7.3.0.tgz",
-      "integrity": "sha512-MjA9KgwCuPEkQd9ncSXvSyJ5y+j2sICHyrI0M3L+6fnS4wMSNDc1ARXsbTfbb2cXHn17VisSnU/sHFTCxVxSMw==",
+      "version": "7.9.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-builder-react-jsx/-/helper-builder-react-jsx-7.9.0.tgz",
+      "integrity": "sha512-weiIo4gaoGgnhff54GQ3P5wsUQmnSwpkvU0r6ZHq6TzoSzKy4JxHEgnxNytaKbov2a9z/CVNyzliuCOUPEX3Jw==",
       "requires": {
-        "@babel/types": "^7.3.0",
-        "esutils": "^2.0.0"
+        "@babel/helper-annotate-as-pure": "^7.8.3",
+        "@babel/types": "^7.9.0"
       }
     },
-    "@babel/helper-call-delegate": {
-      "version": "7.4.4",
-      "resolved": "https://registry.npmjs.org/@babel/helper-call-delegate/-/helper-call-delegate-7.4.4.tgz",
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+    "@babel/helper-builder-react-jsx-experimental": {
+      "version": "7.9.5",
+      "resolved": "https://registry.npmjs.org/@babel/helper-builder-react-jsx-experimental/-/helper-builder-react-jsx-experimental-7.9.5.tgz",
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       "requires": {
-        "@babel/helper-hoist-variables": "^7.4.4",
-        "@babel/traverse": "^7.4.4",
-        "@babel/types": "^7.4.4"
+        "@babel/helper-annotate-as-pure": "^7.8.3",
+        "@babel/helper-module-imports": "^7.8.3",
+        "@babel/types": "^7.9.5"
+      }
+    },
+    "@babel/helper-compilation-targets": {
+      "version": "7.9.6",
+      "resolved": "https://registry.npmjs.org/@babel/helper-compilation-targets/-/helper-compilation-targets-7.9.6.tgz",
+      "integrity": "sha512-x2Nvu0igO0ejXzx09B/1fGBxY9NXQlBW2kZsSxCJft+KHN8t9XWzIvFxtPHnBOAXpVsdxZKZFbRUC8TsNKajMw==",
+      "requires": {
+        "@babel/compat-data": "^7.9.6",
+        "browserslist": "^4.11.1",
+        "invariant": "^2.2.4",
+        "levenary": "^1.1.1",
+        "semver": "^5.5.0"
       }
     },
     "@babel/helper-create-class-features-plugin": {
-      "version": "7.5.5",
-      "resolved": "https://registry.npmjs.org/@babel/helper-create-class-features-plugin/-/helper-create-class-features-plugin-7.5.5.tgz",
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+      "resolved": "https://registry.npmjs.org/@babel/helper-create-class-features-plugin/-/helper-create-class-features-plugin-7.9.6.tgz",
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+      "dev": true,
       "requires": {
-        "@babel/helper-function-name": "^7.1.0",
-        "@babel/helper-member-expression-to-functions": "^7.5.5",
-        "@babel/helper-optimise-call-expression": "^7.0.0",
-        "@babel/helper-plugin-utils": "^7.0.0",
-        "@babel/helper-replace-supers": "^7.5.5",
-        "@babel/helper-split-export-declaration": "^7.4.4"
+        "@babel/helper-function-name": "^7.9.5",
+        "@babel/helper-member-expression-to-functions": "^7.8.3",
+        "@babel/helper-optimise-call-expression": "^7.8.3",
+        "@babel/helper-plugin-utils": "^7.8.3",
+        "@babel/helper-replace-supers": "^7.9.6",
+        "@babel/helper-split-export-declaration": "^7.8.3"
+      }
+    },
+    "@babel/helper-create-regexp-features-plugin": {
+      "version": "7.8.8",
+      "resolved": "https://registry.npmjs.org/@babel/helper-create-regexp-features-plugin/-/helper-create-regexp-features-plugin-7.8.8.tgz",
+      "integrity": "sha512-LYVPdwkrQEiX9+1R29Ld/wTrmQu1SSKYnuOk3g0CkcZMA1p0gsNxJFj/3gBdaJ7Cg0Fnek5z0DsMULePP7Lrqg==",
+      "requires": {
+        "@babel/helper-annotate-as-pure": "^7.8.3",
+        "@babel/helper-regex": "^7.8.3",
+        "regexpu-core": "^4.7.0"
       }
     },
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+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.3.tgz",
+      "integrity": "sha512-Hz/mrNwitNRh/HUAtM/VT/5VH+ygD6DV7mYKZAtHOrbs8U7lvPS6xf7EJKMF0uW1KJCl0H701g3ZGus+muE5vQ==",
       "dev": true
     },
     "worker-farm": {
@@ -5928,6 +6954,11 @@
         "strip-ansi": "^5.0.0"
       },
       "dependencies": {
+        "is-fullwidth-code-point": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
+          "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8="
+        },
         "string-width": {
           "version": "3.1.0",
           "resolved": "https://registry.npmjs.org/string-width/-/string-width-3.1.0.tgz",
@@ -5962,6 +6993,15 @@
         "async-limiter": "~1.0.0"
       }
     },
+    "xregexp": {
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/xregexp/-/xregexp-4.3.0.tgz",
+      "integrity": "sha512-7jXDIFXh5yJ/orPn4SXjuVrWWoi4Cr8jfV1eHv9CixKSbU+jY4mxfrBwAuDvupPNKpMUY+FeIqsVw/JLT9+B8g==",
+      "dev": true,
+      "requires": {
+        "@babel/runtime-corejs3": "^7.8.3"
+      }
+    },
     "xtend": {
       "version": "4.0.2",
       "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
@@ -5995,6 +7035,49 @@
         "yargs-parser": "^13.1.0"
       },
       "dependencies": {
+        "find-up": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/find-up/-/find-up-3.0.0.tgz",
+          "integrity": "sha512-1yD6RmLI1XBfxugvORwlck6f75tYL+iR0jqwsOrOxMZyGYqUuDhJ0l4AXdO1iX/FTs9cBAMEk1gWSEx1kSbylg==",
+          "requires": {
+            "locate-path": "^3.0.0"
+          }
+        },
+        "is-fullwidth-code-point": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
+          "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8="
+        },
+        "locate-path": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-3.0.0.tgz",
+          "integrity": "sha512-7AO748wWnIhNqAuaty2ZWHkQHRSNfPVIsPIfwEOWO22AmaoVrWavlOcMR5nzTLNYvp36X220/maaRsrec1G65A==",
+          "requires": {
+            "p-locate": "^3.0.0",
+            "path-exists": "^3.0.0"
+          }
+        },
+        "p-limit": {
+          "version": "2.3.0",
+          "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-2.3.0.tgz",
+          "integrity": "sha512-//88mFWSJx8lxCzwdAABTJL2MyWB12+eIY7MDL2SqLmAkeKU9qxRvWuSyTjm3FUmpBEMuFfckAIqEaVGUDxb6w==",
+          "requires": {
+            "p-try": "^2.0.0"
+          }
+        },
+        "p-locate": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/p-locate/-/p-locate-3.0.0.tgz",
+          "integrity": "sha512-x+12w/To+4GFfgJhBEpiDcLozRJGegY+Ei7/z0tSLkMmxGZNybVMSfWj9aJn8Z5Fc7dBUNJOOVgPv2H7IwulSQ==",
+          "requires": {
+            "p-limit": "^2.0.0"
+          }
+        },
+        "p-try": {
+          "version": "2.2.0",
+          "resolved": "https://registry.npmjs.org/p-try/-/p-try-2.2.0.tgz",
+          "integrity": "sha512-R4nPAVTAU0B9D35/Gk3uJf/7XYbQcyohSKdvAxIRSNghFl4e71hVoGnBNQz9cWaXxO2I10KTC+3jMdvvoKw6dQ=="
+        },
         "string-width": {
           "version": "3.1.0",
           "resolved": "https://registry.npmjs.org/string-width/-/string-width-3.1.0.tgz",
diff --git a/package.json b/package.json
index 3b7a825..b542201 100644
--- a/package.json
+++ b/package.json
@@ -7,30 +7,40 @@
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
     "build": "webpack --config webpack.config.js",
-    "start": "NODE_ENV=development webpack --watch --config webpack.config.js"
+    "start": "NODE_ENV=development webpack --watch --config webpack.config.js",
+    "lint": "eslint src && eslint inc",
+    "lint:fix": "eslint src --fix && eslint inc --fix"
   },
   "author": "Robert O'Rourke <rob@humanmade.com>",
   "license": "GPL-3.0",
   "dependencies": {
-    "@babel/cli": "^7.4.4",
-    "@babel/core": "^7.4.5",
-    "@babel/plugin-proposal-class-properties": "^7.5.5",
-    "@babel/plugin-transform-runtime": "^7.4.4",
-    "@babel/polyfill": "^7.4.4",
-    "@babel/preset-env": "^7.4.5",
-    "@babel/preset-react": "^7.0.0",
-    "@babel/runtime": "^7.4.5",
-    "@wordpress/babel-preset-default": "^4.3.0",
-    "babel-loader": "^8.0.6",
+    "@babel/cli": "^7.8.4",
+    "@babel/core": "^7.9.6",
+    "@babel/plugin-transform-runtime": "^7.9.6",
+    "@babel/polyfill": "^7.8.7",
+    "@babel/preset-env": "^7.9.6",
+    "@babel/preset-react": "^7.9.4",
+    "@babel/runtime": "^7.9.6",
+    "@wordpress/babel-preset-default": "^4.12.1",
+    "babel-loader": "^8.1.0",
     "classnames": "^2.2.6",
-    "deepmerge": "^4.0.0",
+    "deepmerge": "^4.2.2",
     "dom-scroll-into-view": "^2.0.1",
-    "styled-components": "^4.3.2",
-    "webpack": "^4.35.0",
-    "webpack-bundle-analyzer": "^3.3.2",
-    "webpack-cli": "^3.3.5"
+    "styled-components": "^4.4.1",
+    "webpack": "^4.43.0",
+    "webpack-bundle-analyzer": "^3.7.0",
+    "webpack-cli": "^3.3.11"
   },
   "devDependencies": {
-    "eslint": "^6.0.1"
+    "@babel/plugin-proposal-class-properties": "^7.8.3",
+    "babel-eslint": "^10.1.0",
+    "eslint": "^6.8.0",
+    "eslint-config-humanmade": "^0.8.0",
+    "eslint-config-prettier": "^6.10.0",
+    "eslint-config-react-app": "^3.0.8",
+    "eslint-plugin-flowtype": "^3.13.0",
+    "eslint-plugin-import": "^2.20.1",
+    "eslint-plugin-jsx-a11y": "^6.2.3",
+    "eslint-plugin-react": "^7.19.0"
   }
 }
diff --git a/src/experiments.js b/src/experiments.js
index deb78ab..2815de4 100644
--- a/src/experiments.js
+++ b/src/experiments.js
@@ -33,10 +33,6 @@ class Test extends HTMLElement {
 		return this.getAttribute( 'goal' );
 	}
 
-	constructor() {
-		super();
-	}
-
 	connectedCallback() {
 		// Extract test set by URL parameters.
 		const regex = new RegExp( `(utm_campaign|set_test)=test_${ this.testIdWithPost }:(\\d+)`, 'i' );
@@ -234,10 +230,6 @@ class ExperienceBlock extends HTMLElement {
 		return this.getAttribute( 'client-id' );
 	}
 
-	constructor() {
-		super();
-	}
-
 	connectedCallback() {
 		// Set default styles.
 		this.attachShadow( { mode: 'open' } );
diff --git a/src/features/titles/components/duration.js b/src/features/titles/components/duration.js
index 598a1fc..822dc36 100644
--- a/src/features/titles/components/duration.js
+++ b/src/features/titles/components/duration.js
@@ -16,7 +16,7 @@ const Duration = props => {
 
 		return function cleanup() {
 			clearInterval( timer );
-		}
+		};
 	} );
 
 	if ( duration <= 0 ) {
@@ -25,7 +25,7 @@ const Duration = props => {
 
 	return (
 		<span>{ getDurationString( duration ) }</span>
-	)
+	);
 };
 
 export default Duration;
diff --git a/src/features/titles/components/field-date-range.js b/src/features/titles/components/field-date-range.js
index 9ffb804..382a4c9 100644
--- a/src/features/titles/components/field-date-range.js
+++ b/src/features/titles/components/field-date-range.js
@@ -1,4 +1,3 @@
-/* global wp */
 import React from 'react';
 import { Notice } from '.';
 
@@ -29,7 +28,7 @@ const DateRange = props => {
 					currentTime={ startDate.toISOString() }
 					onChange={ time => {
 						const newDate = new Date( time );
-						onChangeStart( newDate < endDate ? newDate.getTime() : endTime - ( 24 * 60 * 60 * 1000 ) )
+						onChangeStart( newDate < endDate ? newDate.getTime() : endTime - ( 24 * 60 * 60 * 1000 ) );
 					} }
 				/>
 			</div>
diff --git a/src/features/titles/components/field-title-text.js b/src/features/titles/components/field-title-text.js
index b3d0ee7..6247ac0 100644
--- a/src/features/titles/components/field-title-text.js
+++ b/src/features/titles/components/field-title-text.js
@@ -1,4 +1,3 @@
-/* global wp */
 import React, { Fragment } from 'react';
 import styled from 'styled-components';
 import { getLetter } from '../utils';
@@ -59,7 +58,7 @@ const removeTitle = ( titles, index ) => {
 	const newTitles = [ ...titles ];
 	newTitles.splice( index, 1 );
 	return newTitles;
-}
+};
 
 const TitleTextField = props => {
 	const {
@@ -132,7 +131,7 @@ const TitleTextField = props => {
 							) }
 						</Info>
 					</Variant>
-				)
+				);
 			} ) }
 			{ isEditable && allTitles.length < 26 && (
 				<TextareaControl
diff --git a/src/features/titles/components/field-traffic-percentage.js b/src/features/titles/components/field-traffic-percentage.js
index 8fe999e..baa4eed 100644
--- a/src/features/titles/components/field-traffic-percentage.js
+++ b/src/features/titles/components/field-traffic-percentage.js
@@ -1,4 +1,3 @@
-/* global wp */
 import React, { Fragment } from 'react';
 import styled from 'styled-components';
 
@@ -8,7 +7,7 @@ const { __ } = wp.i18n;
 const StyledRangeControl = styled( RangeControl )`
 	.components-base-control__field { justify-content: flex-start; }
 	.components-range-control__slider { flex: 1 1 50%; }
-`
+`;
 
 const TrafficPercentage = props => {
 	const { value, onChange } = props;
diff --git a/src/features/titles/components/index.js b/src/features/titles/components/index.js
index 9bcfa1c..a87618c 100644
--- a/src/features/titles/components/index.js
+++ b/src/features/titles/components/index.js
@@ -1,4 +1,3 @@
-/* global wp */
 import React from 'react';
 import styled from 'styled-components';
 export { default as Duration } from './duration';
diff --git a/src/features/titles/components/panel-row.js b/src/features/titles/components/panel-row.js
index bb27663..1b840e0 100644
--- a/src/features/titles/components/panel-row.js
+++ b/src/features/titles/components/panel-row.js
@@ -1,4 +1,3 @@
-/* global wp */
 import React from 'react';
 import styled from 'styled-components';
 
diff --git a/src/features/titles/components/plugin-icon.js b/src/features/titles/components/plugin-icon.js
index 0d99363..0890d5a 100644
--- a/src/features/titles/components/plugin-icon.js
+++ b/src/features/titles/components/plugin-icon.js
@@ -1,4 +1,3 @@
-/* global wp */
 import React from 'react';
 import withTestData from '../data/with-test-data';
 import styled from 'styled-components';
diff --git a/src/features/titles/data/with-test-data.js b/src/features/titles/data/with-test-data.js
index ede87e9..4b685c6 100644
--- a/src/features/titles/data/with-test-data.js
+++ b/src/features/titles/data/with-test-data.js
@@ -1,4 +1,3 @@
-/* global wp */
 import deepmerge from 'deepmerge';
 import { DEFAULT_TEST } from './shapes';
 
@@ -32,7 +31,7 @@ const dispatchHandler = ( dispatch, props ) => {
 		}
 
 		setState( { isSaving: false } );
-	}
+	};
 
 	const updateTest = async ( test = {}, titles = false, save = false ) => {
 		const data = {
@@ -103,7 +102,7 @@ const withTestData = compose(
 			titles: select( 'core/editor' ).getEditedPostAttribute( 'ab_test_titles' ) || [],
 		};
 	} ),
-	withDispatch( dispatchHandler )
+	withDispatch( dispatchHandler ),
 );
 
 export default withTestData;
diff --git a/src/features/titles/index.js b/src/features/titles/index.js
index b83410f..21d33f5 100644
--- a/src/features/titles/index.js
+++ b/src/features/titles/index.js
@@ -1,4 +1,3 @@
-/* global wp */
 import Plugin from './plugin';
 import { PluginIcon } from './components';
 
diff --git a/src/features/titles/plugin.js b/src/features/titles/plugin.js
index 9a3de35..44aa627 100644
--- a/src/features/titles/plugin.js
+++ b/src/features/titles/plugin.js
@@ -1,4 +1,3 @@
-/* global wp */
 import React, { Fragment } from 'react';
 import { Panel } from './components';
 import { DEFAULT_TEST } from './data/shapes';
diff --git a/src/features/titles/results.js b/src/features/titles/results.js
index 4a750f5..bbb0b0d 100644
--- a/src/features/titles/results.js
+++ b/src/features/titles/results.js
@@ -1,4 +1,3 @@
-/* global wp */
 import React, { Fragment } from 'react';
 import withTestData from './data/with-test-data';
 import {
@@ -84,7 +83,7 @@ export const Results = props => {
 								</Fragment>
 							) }
 						</Variant>
-					)
+					);
 				} ) }
 			</PanelRow>
 			<PanelRow>
@@ -114,7 +113,7 @@ export const ResultsWithData = compose(
 				} );
 			},
 		};
-	} )
+	} ),
 )( Results );
 
 export default ResultsWithData;
diff --git a/src/features/titles/settings.js b/src/features/titles/settings.js
index 0f286d5..d7d32a0 100644
--- a/src/features/titles/settings.js
+++ b/src/features/titles/settings.js
@@ -1,4 +1,3 @@
-/* global wp */
 import React, { Fragment } from 'react';
 import {
 	Button,
diff --git a/src/features/titles/utils/index.js b/src/features/titles/utils/index.js
index 6b6d38d..72072fc 100644
--- a/src/features/titles/utils/index.js
+++ b/src/features/titles/utils/index.js
@@ -1,5 +1,3 @@
-/* global moment */
-
 export const getLetter = index => ( 'abcdefghijklmnopqrstuvwxyz'.toUpperCase() )[ Math.max( 0, Math.min( index, 26 ) ) ];
 
 export const getDateString = date => moment( date ).format( 'MMMM D, YYYY — HH:mm' );

From bc203045c66ec4163238ce57275c72804b173d3d Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Tue, 12 May 2020 11:49:12 +0100
Subject: [PATCH 03/41] record an event when an XB is viewed

---
 src/experiments.js | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/experiments.js b/src/experiments.js
index 2815de4..e94d8ae 100644
--- a/src/experiments.js
+++ b/src/experiments.js
@@ -266,6 +266,14 @@ class ExperienceBlock extends HTMLElement {
 					this.appendChild( experience );
 				}
 
+				// Log an event for tracking views and audience.
+				window.Altis.Analytics.record( 'experienceView', {
+					attributes: {
+						clientId: this.clientId,
+						audience: template.dataset.audience,
+					},
+				} );
+
 				// Keep a reference ot the node for easier replacement later.
 				this.experience = experience;
 				break;

From beea777ac9f86ede239893ef7ee545087482e0b8 Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Tue, 12 May 2020 16:06:38 +0100
Subject: [PATCH 04/41] Fix nodelist iterator

---
 src/experiments.js | 19 ++++++-------------
 1 file changed, 6 insertions(+), 13 deletions(-)

diff --git a/src/experiments.js b/src/experiments.js
index e94d8ae..558609d 100644
--- a/src/experiments.js
+++ b/src/experiments.js
@@ -224,8 +224,6 @@ Test.registerGoal( 'click', ( element, record ) => {
 
 class ExperienceBlock extends HTMLElement {
 
-	exprience = null;
-
 	get clientId() {
 		return this.getAttribute( 'client-id' );
 	}
@@ -256,26 +254,21 @@ class ExperienceBlock extends HTMLElement {
 		const templates = document.querySelectorAll( `template[data-parent-id="${ this.clientId }"]` );
 
 		// Find a matching template.
-		for ( const index in templates ) {
+		for ( let index = 0; index < templates.length; index++ ) {
 			const template = templates[ index ];
-			if ( audiences.indexOf( Number( template.dataset.audience ) ) >= 0 ) {
+			const audience = Number( template.dataset.audience );
+			if ( audiences.indexOf( audience ) >= 0 ) {
 				const experience = template.content.cloneNode( true );
-				if ( this.experience ) {
-					this.replaceChild( experience, this.experience );
-				} else {
-					this.appendChild( experience );
-				}
+				this.innerHTML = '';
+				this.appendChild( experience );
 
 				// Log an event for tracking views and audience.
 				window.Altis.Analytics.record( 'experienceView', {
 					attributes: {
 						clientId: this.clientId,
-						audience: template.dataset.audience,
+						audience: audience,
 					},
 				} );
-
-				// Keep a reference ot the node for easier replacement later.
-				this.experience = experience;
 				break;
 			}
 		}

From 07dc288ac0e91dd17cc5ab8370f2c4866df0a999 Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Tue, 12 May 2020 16:07:16 +0100
Subject: [PATCH 05/41] Web components cannot be self closing

---
 inc/features/blocks/experience/register.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/inc/features/blocks/experience/register.php b/inc/features/blocks/experience/register.php
index bca763c..c9ad7d9 100644
--- a/inc/features/blocks/experience/register.php
+++ b/inc/features/blocks/experience/register.php
@@ -73,7 +73,7 @@ function render_block( array $attributes, ?string $inner_content = '' ) : string
 	}
 
 	return sprintf(
-		'%s<experience-block class="%s" client-id="%s" />',
+		'%s<experience-block class="%s" client-id="%s"></experience-block>',
 		$inner_content,
 		$class_name,
 		$client_id

From 7dc8b51ae3da04ec4da2ebcfffceb9e2d48dd551 Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Tue, 12 May 2020 16:07:53 +0100
Subject: [PATCH 06/41] Fix positioning of the audience picker component

---
 .../blocks/experience/components/URLInput.js  | 62 +++++++++++--------
 inc/features/blocks/experience/edit.css       |  4 ++
 2 files changed, 39 insertions(+), 27 deletions(-)

diff --git a/inc/features/blocks/experience/components/URLInput.js b/inc/features/blocks/experience/components/URLInput.js
index fe47dae..a95ed43 100644
--- a/inc/features/blocks/experience/components/URLInput.js
+++ b/inc/features/blocks/experience/components/URLInput.js
@@ -430,32 +430,34 @@ class URLInput extends Component {
 					'has-border': hasBorder,
 				} ) }
 			>
-				<input
-					className="block-editor-url-input__input"
-					autoFocus={ autoFocus }
-					type="text"
-					aria-label={ __( 'URL' ) }
-					required
-					value={ value }
-					onChange={ this.onChange }
-					onFocus={ this.onFocus }
-					onInput={ stopEventPropagation }
-					placeholder={ placeholder }
-					onKeyDown={ this.onKeyDown }
-					role="combobox"
-					aria-controls={ suggestionsListboxId }
-					aria-expanded={ showSuggestions }
-					aria-autocomplete="list"
-					aria-owns={ suggestionsListboxId }
-					aria-activedescendant={
-						selectedSuggestion !== null
-							? `${ suggestionOptionIdPrefix }-${ selectedSuggestion }`
-							: undefined
-					}
-					ref={ this.inputRef }
-				/>
-
-				{ loading && <Spinner /> }
+				<div style={{ position: 'relative' }}>
+					<input
+						className="block-editor-url-input__input"
+						autoFocus={ autoFocus }
+						type="text"
+						aria-label={ __( 'URL' ) }
+						required
+						value={ value }
+						onChange={ this.onChange }
+						onFocus={ this.onFocus }
+						onInput={ stopEventPropagation }
+						placeholder={ placeholder }
+						onKeyDown={ this.onKeyDown }
+						role="combobox"
+						aria-controls={ suggestionsListboxId }
+						aria-expanded={ showSuggestions }
+						aria-autocomplete="list"
+						aria-owns={ suggestionsListboxId }
+						aria-activedescendant={
+							selectedSuggestion !== null
+								? `${ suggestionOptionIdPrefix }-${ selectedSuggestion }`
+								: undefined
+						}
+						ref={ this.inputRef }
+					/>
+
+					{ loading && <Spinner /> }
+				</div>
 
 				{ isFunction( renderSuggestions ) &&
 					showSuggestions &&
@@ -476,9 +478,11 @@ class URLInput extends Component {
 					showSuggestions &&
 					!! suggestions.length && (
 					<Popover
-						position="bottom"
+						className="block-editor-url-input__popover"
+						position="bottom left"
 						noArrow
 						focusOnMount={ false }
+						anchorRect={ this.inputRef.current.getBoundingClientRect() }
 					>
 						<div
 							{ ...suggestionsListProps }
@@ -486,6 +490,10 @@ class URLInput extends Component {
 								'block-editor-url-input__suggestions',
 								`${ className }__suggestions`,
 							) }
+							style={ {
+								width: this.inputRef.current.offsetWidth,
+								marginRight: '-100px',
+							} }
 						>
 							{ suggestions.map( ( suggestion, index ) => (
 								<Button
diff --git a/inc/features/blocks/experience/edit.css b/inc/features/blocks/experience/edit.css
index ed4054d..4b5417c 100644
--- a/inc/features/blocks/experience/edit.css
+++ b/inc/features/blocks/experience/edit.css
@@ -44,3 +44,7 @@
 .wp-block[data-type="altis/experience-block-variant"] .wp-block {
 	max-width: none;
 }
+
+.block-editor-url-input__popover {
+	margin-left: 100px;
+}

From de274dce4bc83cbe36fd7ceca7fe00523131e45b Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Wed, 13 May 2020 10:48:57 +0100
Subject: [PATCH 07/41] Test load experiments.js async

---
 inc/namespace.php | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/inc/namespace.php b/inc/namespace.php
index 142886a..2a0f651 100644
--- a/inc/namespace.php
+++ b/inc/namespace.php
@@ -63,13 +63,19 @@ function setup() {
  * Queue up the tracker script and required configuration.
  */
 function enqueue_scripts() {
+	global $wp_scripts;
+
 	wp_enqueue_script(
 		'altis-experiments',
 		plugins_url( 'build/experiments.js', ROOT_DIR . '/plugin.php' ),
 		[
 			'altis-analytics',
-		]
+		],
+		'2020-05-12-01'
 	);
+
+	// Load async.
+	$wp_scripts->add_data( 'altis-experiments', 'async', true );
 }
 
 /**

From 214d51659823653547c871464ea865d96d4c0994 Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Thu, 14 May 2020 21:52:19 +0100
Subject: [PATCH 08/41] remove URLInput in favour of UI from main analytics
 plugin

---
 .../experience/components/AudiencePicker.js   | 131 -----
 .../blocks/experience/components/URLInput.js  | 549 ------------------
 inc/features/blocks/experience/edit.js        |   4 +-
 inc/features/blocks/experience/register.php   |   3 +
 inc/features/blocks/namespace.php             |   2 +
 inc/features/blocks/variant/register.php      |   5 +-
 6 files changed, 9 insertions(+), 685 deletions(-)
 delete mode 100644 inc/features/blocks/experience/components/AudiencePicker.js
 delete mode 100644 inc/features/blocks/experience/components/URLInput.js

diff --git a/inc/features/blocks/experience/components/AudiencePicker.js b/inc/features/blocks/experience/components/AudiencePicker.js
deleted file mode 100644
index a506288..0000000
--- a/inc/features/blocks/experience/components/AudiencePicker.js
+++ /dev/null
@@ -1,131 +0,0 @@
-import React, { useState, useEffect } from 'react';
-import URLInput from './URLInput';
-
-const { apiFetch } = wp;
-const { Button } = wp.components;
-const { decodeEntities } = wp.htmlEntities;
-const { __ } = wp.i18n;
-const { addQueryArgs } = wp.url;
-
-/**
- * Fetches link suggestions from the API. This function is an exact copy of a function found at:
- *
- * wordpress/editor/src/components/provider/index.js
- *
- * @param {Object} search
- * @param {number} perPage
- * @return {Promise<Object[]>} List of suggestions
- */
-const fetchSuggestions = async ( search, { perPage = 20 } = {} ) => {
-	const posts = await apiFetch( {
-		path: addQueryArgs( '/wp/v2/audiences', {
-			search,
-			per_page: perPage,
-			status: 'publish',
-		} ),
-	} );
-
-	return posts.map( post => ( {
-		id: post.id,
-		title: decodeEntities( post.title.rendered ) || __( '(no title)' ),
-		url: '',
-	} ) );
-};
-
-/**
- * Fetch a single audience by ID.
- *
- * @param {number} id An audience post ID.
- * @param {Function} callback An optional callback that receives the audience object.
- * @return {Promise<Object>} Audience post object.
- */
-const fetchAudience = async ( id, callback ) => {
-	const post = await apiFetch( {
-		path: `/wp/v2/audiences/${ id }`,
-	} );
-
-	const audience = {
-		id: post.id,
-		title: decodeEntities( post.title.rendered ) || __( '(no title)' ),
-		audience: post.audience,
-		status: post.status,
-	};
-
-	// Allow for easy use with useEffect.
-	callback && callback( audience );
-
-	return audience;
-};
-
-const AudiencePicker = props => {
-	const [ value, setValue ] = useState( '' );
-	const [ selectedAudience, setAudience ] = useState( null );
-
-	// If we have an ID and no value trigger a fetch of the audience object so
-	// that external components can access the audience post data.
-	useEffect( () => {
-		if ( ! props.audience || value !== '' ) {
-			return;
-		}
-
-		fetchAudience( props.audience, audience => {
-			setAudience( audience );
-			props.onSelect( audience );
-		} );
-	}, [ props.audience ] );
-
-	return (
-		<URLInput
-			className="audience-picker-control"
-			label={ props.label || '' }
-			autoFocus={ props.autoFocus || false }
-			placeholder={ props.placeholder || __( 'Search audiences', 'altis-experiments' ) }
-			isFullWidth={ true }
-			hasBorder={ true }
-			__experimentalFetchLinkSuggestions={ fetchSuggestions }
-			fetchLinkSuggestions={ fetchSuggestions }
-			value={ value }
-			onChange={ ( text, audience ) => {
-				// Only update the input value when we don't receive a post object.
-				if ( ! audience ) {
-					setValue( text );
-				}
-
-				// Trigger select event if we receive a post object.
-				if ( audience ) {
-					setAudience( audience );
-					if ( props.onSelect ) {
-						props.onSelect( audience );
-					}
-				}
-			} }
-		>
-			{ selectedAudience && (
-				<p className="audience-picker-control__value">
-					<strong>{ __( 'Current:' ) }</strong>
-					{ ' ' }
-					<span>{ selectedAudience.title }</span>
-				</p>
-			) }
-			{ props.audience && (
-				<Button
-					isLink
-					isDestructive
-					onClick={ () => {
-						setValue( '' );
-						setAudience( null );
-
-						// Allow clearing the value.
-						if ( props.onClearSelection ) {
-							props.onClearSelection();
-						}
-					} }
-				>
-					{ __( 'Clear selection' ) }
-				</Button>
-			) }
-		</URLInput>
-	);
-};
-
-export default AudiencePicker;
diff --git a/inc/features/blocks/experience/components/URLInput.js b/inc/features/blocks/experience/components/URLInput.js
deleted file mode 100644
index a95ed43..0000000
--- a/inc/features/blocks/experience/components/URLInput.js
+++ /dev/null
@@ -1,549 +0,0 @@
-import React from 'react';
-import classnames from 'classnames';
-import scrollIntoView from 'dom-scroll-into-view';
-
-/**
- * External dependencies
- */
-const { throttle, isFunction } = window._;
-
-/**
- * WordPress dependencies
- */
-const { __, sprintf, _n } = wp.i18n;
-const { Component, createRef } = wp.element;
-const { UP, DOWN, ENTER, TAB } = wp.keycodes;
-const {
-	BaseControl,
-	Button,
-	Spinner,
-	withSpokenMessages,
-	Popover,
-} = wp.components;
-const { withInstanceId, withSafeTimeout, compose } = wp.compose;
-const { withSelect } = wp.data;
-const { isURL } = wp.url;
-
-// Since URLInput is rendered in the context of other inputs, but should be
-// considered a separate modal node, prevent keyboard events from propagating
-// as being considered from the input.
-const stopEventPropagation = event => event.stopPropagation();
-
-class URLInput extends Component {
-	constructor( props ) {
-		super( props );
-
-		this.onChange = this.onChange.bind( this );
-		this.onFocus = this.onFocus.bind( this );
-		this.onKeyDown = this.onKeyDown.bind( this );
-		this.selectLink = this.selectLink.bind( this );
-		this.handleOnClick = this.handleOnClick.bind( this );
-		this.bindSuggestionNode = this.bindSuggestionNode.bind( this );
-		this.autocompleteRef = props.autocompleteRef || createRef();
-		this.inputRef = createRef();
-		this.updateSuggestions = throttle(
-			this.updateSuggestions.bind( this ),
-			200,
-		);
-
-		this.suggestionNodes = [];
-
-		this.isUpdatingSuggestions = false;
-
-		this.state = {
-			suggestions: [],
-			showSuggestions: false,
-			selectedSuggestion: null,
-		};
-	}
-
-	componentDidUpdate( prevProps ) {
-		const { showSuggestions, selectedSuggestion } = this.state;
-		const { value } = this.props;
-
-		// only have to worry about scrolling selected suggestion into view
-		// when already expanded
-		if (
-			showSuggestions &&
-			selectedSuggestion !== null &&
-			! this.scrollingIntoView
-		) {
-			this.scrollingIntoView = true;
-
-			scrollIntoView(
-				this.suggestionNodes[ selectedSuggestion ],
-				this.autocompleteRef.current,
-				{
-					onlyScrollIfNeeded: true,
-				},
-			);
-
-			this.props.setTimeout( () => {
-				this.scrollingIntoView = false;
-			}, 100 );
-		}
-
-		// Only attempt an update on suggestions if the input value has actually changed.
-		if (
-			prevProps.value !== value &&
-			this.shouldShowInitialSuggestions()
-		) {
-			this.updateSuggestions();
-		}
-	}
-
-	componentDidMount() {
-		if ( this.shouldShowInitialSuggestions() ) {
-			this.updateSuggestions();
-		}
-	}
-
-	componentWillUnmount() {
-		delete this.suggestionsRequest;
-	}
-
-	bindSuggestionNode( index ) {
-		return ref => {
-			this.suggestionNodes[ index ] = ref;
-		};
-	}
-
-	shouldShowInitialSuggestions() {
-		const { suggestions } = this.state;
-		const {
-			__experimentalShowInitialSuggestions = false,
-			value,
-		} = this.props;
-		return (
-			! this.isUpdatingSuggestions &&
-			__experimentalShowInitialSuggestions &&
-			! ( value && value.length ) &&
-			! ( suggestions && suggestions.length )
-		);
-	}
-
-	updateSuggestions( value = '' ) {
-		const {
-			__experimentalFetchLinkSuggestions: fetchLinkSuggestions,
-			__experimentalHandleURLSuggestions: handleURLSuggestions,
-		} = this.props;
-
-		if ( ! fetchLinkSuggestions ) {
-			return;
-		}
-
-		const isInitialSuggestions = ! ( value && value.length );
-
-		// Allow a suggestions request if:
-		// - there are at least 2 characters in the search input (except manual searches where
-		//   search input length is not required to trigger a fetch)
-		// - this is a direct entry (eg: a URL)
-		if (
-			! isInitialSuggestions &&
-			( value.length < 2 || ( ! handleURLSuggestions && isURL( value ) ) )
-		) {
-			this.setState( {
-				showSuggestions: false,
-				selectedSuggestion: null,
-				loading: false,
-			} );
-
-			return;
-		}
-
-		this.isUpdatingSuggestions = true;
-
-		this.setState( {
-			showSuggestions: true,
-			selectedSuggestion: null,
-			loading: true,
-		} );
-
-		const request = fetchLinkSuggestions( value, {
-			isInitialSuggestions,
-		} );
-
-		request
-			.then( suggestions => {
-				// A fetch Promise doesn't have an abort option. It's mimicked by
-				// comparing the request reference in on the instance, which is
-				// reset or deleted on subsequent requests or unmounting.
-				if ( this.suggestionsRequest !== request ) {
-					return;
-				}
-
-				this.setState( {
-					suggestions,
-					loading: false,
-				} );
-
-				if ( suggestions.length ) {
-					this.props.debouncedSpeak(
-						sprintf(
-							/* translators: %s: number of results. */
-							_n(
-								'%d result found, use up and down arrow keys to navigate.',
-								'%d results found, use up and down arrow keys to navigate.',
-								suggestions.length,
-							),
-							suggestions.length,
-						),
-						'assertive',
-					);
-				} else {
-					this.props.debouncedSpeak(
-						__( 'No results.' ),
-						'assertive',
-					);
-				}
-				this.isUpdatingSuggestions = false;
-			} )
-			.catch( () => {
-				if ( this.suggestionsRequest === request ) {
-					this.setState( {
-						loading: false,
-					} );
-					this.isUpdatingSuggestions = false;
-				}
-			} );
-
-		// Note that this assignment is handled *before* the async search request
-		// as a Promise always resolves on the next tick of the event loop.
-		this.suggestionsRequest = request;
-	}
-
-	onChange( event ) {
-		const inputValue = event.target.value;
-
-		this.props.onChange( inputValue );
-		if ( ! this.props.disableSuggestions ) {
-			this.updateSuggestions( inputValue.trim() );
-		}
-	}
-
-	onFocus() {
-		const { suggestions } = this.state;
-		const { disableSuggestions, value } = this.props;
-
-		// When opening the link editor, if there's a value present, we want to load the suggestions pane with the results for this input search value
-		// Don't re-run the suggestions on focus if there are already suggestions present (prevents searching again when tabbing between the input and buttons)
-		if (
-			value &&
-			! disableSuggestions &&
-			! this.isUpdatingSuggestions &&
-			! ( suggestions && suggestions.length )
-		) {
-			// Ensure the suggestions are updated with the current input value
-			this.updateSuggestions( value.trim() );
-		}
-	}
-
-	onKeyDown( event ) {
-		const {
-			showSuggestions,
-			selectedSuggestion,
-			suggestions,
-			loading,
-		} = this.state;
-
-		// If the suggestions are not shown or loading, we shouldn't handle the arrow keys
-		// We shouldn't preventDefault to allow block arrow keys navigation
-		if ( ! showSuggestions || ! suggestions.length || loading ) {
-			// In the Windows version of Firefox the up and down arrows don't move the caret
-			// within an input field like they do for Mac Firefox/Chrome/Safari. This causes
-			// a form of focus trapping that is disruptive to the user experience. This disruption
-			// only happens if the caret is not in the first or last position in the text input.
-			// See: https://github.com/WordPress/gutenberg/issues/5693#issuecomment-436684747
-			switch ( event.keyCode ) {
-				// When UP is pressed, if the caret is at the start of the text, move it to the 0
-				// position.
-				case UP: {
-					if ( event.target.selectionStart !== 0 ) {
-						event.stopPropagation();
-						event.preventDefault();
-
-						// Set the input caret to position 0
-						event.target.setSelectionRange( 0, 0 );
-					}
-					break;
-				}
-				// When DOWN is pressed, if the caret is not at the end of the text, move it to the
-				// last position.
-				case DOWN: {
-					if (
-						this.props.value.length !== event.target.selectionStart
-					) {
-						event.stopPropagation();
-						event.preventDefault();
-
-						// Set the input caret to the last position
-						event.target.setSelectionRange(
-							this.props.value.length,
-							this.props.value.length,
-						);
-					}
-					break;
-				}
-				// no default
-			}
-
-			return;
-		}
-
-		const suggestion = this.state.suggestions[
-			this.state.selectedSuggestion
-		];
-
-		switch ( event.keyCode ) {
-			case UP: {
-				event.stopPropagation();
-				event.preventDefault();
-				const previousIndex = ! selectedSuggestion
-					? suggestions.length - 1
-					: selectedSuggestion - 1;
-				this.setState( {
-					selectedSuggestion: previousIndex,
-				} );
-				break;
-			}
-			case DOWN: {
-				event.stopPropagation();
-				event.preventDefault();
-				const nextIndex =
-					selectedSuggestion === null ||
-					selectedSuggestion === suggestions.length - 1
-						? 0
-						: selectedSuggestion + 1;
-				this.setState( {
-					selectedSuggestion: nextIndex,
-				} );
-				break;
-			}
-			case TAB: {
-				if ( this.state.selectedSuggestion !== null ) {
-					this.selectLink( suggestion );
-					// Announce a link has been selected when tabbing away from the input field.
-					this.props.speak( __( 'Link selected.' ) );
-				}
-				break;
-			}
-			case ENTER: {
-				if ( this.state.selectedSuggestion !== null ) {
-					event.stopPropagation();
-					this.selectLink( suggestion );
-				}
-				break;
-			}
-			// no default
-		}
-	}
-
-	selectLink( suggestion ) {
-		this.props.onChange( suggestion.url, suggestion );
-		this.setState( {
-			selectedSuggestion: null,
-			showSuggestions: false,
-		} );
-	}
-
-	handleOnClick( suggestion ) {
-		this.selectLink( suggestion );
-		// Move focus to the input field when a link suggestion is clicked.
-		this.inputRef.current.focus();
-	}
-
-	static getDerivedStateFromProps(
-		{
-			value,
-			disableSuggestions,
-			__experimentalShowInitialSuggestions = false,
-		},
-		{ showSuggestions },
-	) {
-		let shouldShowSuggestions = showSuggestions;
-
-		const hasValue = value && value.length;
-
-		if ( ! __experimentalShowInitialSuggestions && ! hasValue ) {
-			shouldShowSuggestions = false;
-		}
-
-		if ( disableSuggestions === true ) {
-			shouldShowSuggestions = false;
-		}
-
-		return {
-			showSuggestions: shouldShowSuggestions,
-		};
-	}
-
-	render() {
-		const {
-			children,
-			label,
-			instanceId,
-			className,
-			isFullWidth,
-			hasBorder,
-			__experimentalRenderSuggestions: renderSuggestions,
-			placeholder = __( 'Paste URL or type to search' ),
-			value = '',
-			autoFocus = true,
-			__experimentalShowInitialSuggestions = false,
-		} = this.props;
-
-		const {
-			showSuggestions,
-			suggestions,
-			selectedSuggestion,
-			loading,
-		} = this.state;
-
-		const id = `url-input-control-${ instanceId }`;
-
-		const suggestionsListboxId = `block-editor-url-input-suggestions-${ instanceId }`;
-		const suggestionOptionIdPrefix = `block-editor-url-input-suggestion-${ instanceId }`;
-
-		const suggestionsListProps = {
-			id: suggestionsListboxId,
-			ref: this.autocompleteRef,
-			role: 'listbox',
-		};
-
-		const buildSuggestionItemProps = ( suggestion, index ) => {
-			return {
-				role: 'option',
-				tabIndex: '-1',
-				id: `${ suggestionOptionIdPrefix }-${ index }`,
-				ref: this.bindSuggestionNode( index ),
-				'aria-selected': index === selectedSuggestion,
-			};
-		};
-
-		/* eslint-disable jsx-a11y/no-autofocus */
-		return (
-			<BaseControl
-				label={ label }
-				id={ id }
-				className={ classnames( 'block-editor-url-input', className, {
-					'is-full-width': isFullWidth,
-					'has-border': hasBorder,
-				} ) }
-			>
-				<div style={{ position: 'relative' }}>
-					<input
-						className="block-editor-url-input__input"
-						autoFocus={ autoFocus }
-						type="text"
-						aria-label={ __( 'URL' ) }
-						required
-						value={ value }
-						onChange={ this.onChange }
-						onFocus={ this.onFocus }
-						onInput={ stopEventPropagation }
-						placeholder={ placeholder }
-						onKeyDown={ this.onKeyDown }
-						role="combobox"
-						aria-controls={ suggestionsListboxId }
-						aria-expanded={ showSuggestions }
-						aria-autocomplete="list"
-						aria-owns={ suggestionsListboxId }
-						aria-activedescendant={
-							selectedSuggestion !== null
-								? `${ suggestionOptionIdPrefix }-${ selectedSuggestion }`
-								: undefined
-						}
-						ref={ this.inputRef }
-					/>
-
-					{ loading && <Spinner /> }
-				</div>
-
-				{ isFunction( renderSuggestions ) &&
-					showSuggestions &&
-					!! suggestions.length &&
-					renderSuggestions( {
-						suggestions,
-						selectedSuggestion,
-						suggestionsListProps,
-						buildSuggestionItemProps,
-						isLoading: loading,
-						handleSuggestionClick: this.handleOnClick,
-						isInitialSuggestions:
-							__experimentalShowInitialSuggestions &&
-							! ( value && value.length ),
-					} ) }
-
-				{ ! isFunction( renderSuggestions ) &&
-					showSuggestions &&
-					!! suggestions.length && (
-					<Popover
-						className="block-editor-url-input__popover"
-						position="bottom left"
-						noArrow
-						focusOnMount={ false }
-						anchorRect={ this.inputRef.current.getBoundingClientRect() }
-					>
-						<div
-							{ ...suggestionsListProps }
-							className={ classnames(
-								'block-editor-url-input__suggestions',
-								`${ className }__suggestions`,
-							) }
-							style={ {
-								width: this.inputRef.current.offsetWidth,
-								marginRight: '-100px',
-							} }
-						>
-							{ suggestions.map( ( suggestion, index ) => (
-								<Button
-									{ ...buildSuggestionItemProps(
-										suggestion,
-										index,
-									) }
-									key={ suggestion.id }
-									className={ classnames(
-										'block-editor-url-input__suggestion',
-										{
-											'is-selected':
-													index ===
-													selectedSuggestion,
-										},
-									) }
-									onClick={ () =>
-										this.handleOnClick( suggestion ) }
-								>
-									{ suggestion.title }
-								</Button>
-							) ) }
-						</div>
-					</Popover>
-				) }
-
-				{ children }
-			</BaseControl>
-		);
-		/* eslint-enable jsx-a11y/no-autofocus */
-	}
-}
-
-/**
- * @see https://github.com/WordPress/gutenberg/blob/master/packages/block-editor/src/components/url-input/README.md
- */
-export default compose(
-	withSafeTimeout,
-	withSpokenMessages,
-	withInstanceId,
-	withSelect( ( select, props ) => {
-		// If a link suggestions handler is already provided then
-		// bail
-		if ( isFunction( props.__experimentalFetchLinkSuggestions ) ) {
-			return;
-		}
-		const { getSettings } = select( 'core/block-editor' );
-		return {
-			__experimentalFetchLinkSuggestions: getSettings()
-				.__experimentalFetchLinkSuggestions,
-		};
-	} ),
-)( URLInput );
diff --git a/inc/features/blocks/experience/edit.js b/inc/features/blocks/experience/edit.js
index ecd6f1d..8a17e2a 100644
--- a/inc/features/blocks/experience/edit.js
+++ b/inc/features/blocks/experience/edit.js
@@ -1,8 +1,8 @@
 import React, { Fragment, useState } from 'react';
-import AudiencePicker from './components/AudiencePicker';
+
+const { AudiencePicker } = Altis.Analytics.components;
 
 const {
-	// AlignmentToolbar,
 	BlockControls,
 	InnerBlocks,
 	InspectorControls,
diff --git a/inc/features/blocks/experience/register.php b/inc/features/blocks/experience/register.php
index c9ad7d9..909f0d2 100644
--- a/inc/features/blocks/experience/register.php
+++ b/inc/features/blocks/experience/register.php
@@ -37,6 +37,9 @@ function enqueue_assets() {
 			'wp-components',
 			'wp-core-data',
 			'wp-edit-post',
+			'altis-experiments-features-blocks-variant',
+			// Exports the audience UI modal component.
+			'altis-analytics-audience-ui',
 		]
 	);
 
diff --git a/inc/features/blocks/namespace.php b/inc/features/blocks/namespace.php
index 4b430ca..383a697 100644
--- a/inc/features/blocks/namespace.php
+++ b/inc/features/blocks/namespace.php
@@ -12,6 +12,8 @@ function setup() {
 	// Register blocks.
 	Experience\setup();
 	Variant\setup();
+
+	// Enqueue the audience UI JS in the editor.
 }
 
 function get_block_settings( string $name ) : ?array {
diff --git a/inc/features/blocks/variant/register.php b/inc/features/blocks/variant/register.php
index 3892868..35754b1 100644
--- a/inc/features/blocks/variant/register.php
+++ b/inc/features/blocks/variant/register.php
@@ -29,9 +29,8 @@ function enqueue_assets() {
 	wp_enqueue_script(
 		'altis-experiments-features-blocks-variant',
 		plugins_url( 'build/features/blocks/variant.js', ROOT_DIR . '/plugin.php' ),
-		[
-			'altis-experiments-features-blocks-experience',
-		]
+		[],
+		'2020-05-14-01'
 	);
 }
 

From 8965c197cd9519b395029ce7111954bfb6753e00 Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Sat, 16 May 2020 16:57:10 +0100
Subject: [PATCH 09/41] Adding UI polish plus copy function

---
 inc/features/blocks/experience/edit.css |  61 +++++++++---
 inc/features/blocks/experience/edit.js  | 122 +++++++++++++++---------
 2 files changed, 123 insertions(+), 60 deletions(-)

diff --git a/inc/features/blocks/experience/edit.css b/inc/features/blocks/experience/edit.css
index 4b5417c..b606498 100644
--- a/inc/features/blocks/experience/edit.css
+++ b/inc/features/blocks/experience/edit.css
@@ -4,11 +4,10 @@
 
 .altis-experience-block-header {
 	text-transform: uppercase;
-	font-variant: small-caps;
+	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
 	font-size: 16px;
-	font-weight: bold;
 	background: repeating-linear-gradient(
-		45deg,
+		315deg,
 		rgba(0, 0, 0, .05),
 		rgba(0, 0, 0, .05) 10px,
 		rgba(0, 0, 0, 0) 10px,
@@ -18,18 +17,54 @@
 	margin: 0 -14px -28px;
 	position: relative;
 	top: -14px;
+	display: flex;
+}
+
+.altis-experience-block-header__title {
+	flex: 1;
+	font-weight: bold;
+}
+
+.altis-experience-block-header__toolbar {
+	flex: 0;
+	border: 0;
+	padding: 0;
+	margin: 0;
+	display: flex;
+}
+
+.altis-experience-block-header__toolbar .components-icon-button {
+	padding: 3px 5px;
+	margin-left: 3px;
+}
+
+.altis-variants-toolbar {
+	max-width: 460px;
+	overflow-x: auto;
 }
 
-.altis-variant-toolbar .components-button.is-link {
-	padding-right: 10px;
-	padding-left: 10px;
+.altis-variants-toolbar .altis-variant-button {
+	width: auto;
+	margin: 3px;
+	height: 30px;
+	line-height: 13px;
+	flex: 0 0 5.2em;
 }
 
-.altis-variant-toolbar--active .components-button.is-link {
-	font-weight: 700;
-	color: inherit;
-	text-decoration: none;
-	padding-left: 2px;
+.altis-variants-toolbar .altis-variant-button.is-active,
+.altis-variants-toolbar .altis-variant-button.is-pressed,
+.altis-variants-toolbar .altis-variant-button.is-active:hover,
+.altis-variants-toolbar .altis-variant-button.is-pressed:hover,
+.altis-variants-toolbar .altis-variant-button.is-active:focus,
+.altis-variants-toolbar .altis-variant-button.is-pressed:focus {
+	outline: none;
+	color: #fff;
+	box-shadow: none;
+	background: #555d66;
+}
+
+.altis-variants-toolbar .altis-add-variant-button svg {
+	padding: 6px 5px 4px 5px;
 }
 
 .audience-picker-control .audience-picker-control__value {
@@ -44,7 +79,3 @@
 .wp-block[data-type="altis/experience-block-variant"] .wp-block {
 	max-width: none;
 }
-
-.block-editor-url-input__popover {
-	margin-left: 100px;
-}
diff --git a/inc/features/blocks/experience/edit.js b/inc/features/blocks/experience/edit.js
index 8a17e2a..37b5797 100644
--- a/inc/features/blocks/experience/edit.js
+++ b/inc/features/blocks/experience/edit.js
@@ -7,15 +7,16 @@ const {
 	InnerBlocks,
 	InspectorControls,
 } = wp.blockEditor;
-const { createBlock } = wp.blocks;
+const { createBlock, cloneBlock } = wp.blocks;
 const {
 	Button,
+	IconButton,
 	PanelBody,
 	Toolbar,
 } = wp.components;
 const { compose } = wp.compose;
 const { withSelect, withDispatch } = wp.data;
-const { __ } = wp.i18n;
+const { sprintf, __ } = wp.i18n;
 
 /**
  * Only variants can be direct descendents so that we can generate
@@ -37,6 +38,8 @@ const Edit = ( {
 	attributes,
 	className,
 	clientId,
+	copyVariant,
+	isSelected,
 	removeVariant,
 	setAttributes,
 	setVariantAttributes,
@@ -62,52 +65,31 @@ const Edit = ( {
 	return (
 		<Fragment>
 			<BlockControls>
-				{ variants.map( ( variant, index ) => {
-					const controls = activeVariant !== variant.clientId
-						? []
-						: [
-							{
-								icon: 'trash',
-								title: __( 'Remove this variant', 'altis-experiments' ),
-								isActive: false,
-								onClick: () => {
-									if ( ! window.confirm( __( 'Are you sure you want to remove this variant?', 'altis-experiments' ) ) ) {
-										return;
-									}
-									setVariant( variants[ 0 ].clientId );
-									removeVariant( variant.clientId );
-								},
-							},
-						];
-
-					return (
-						<Toolbar
-							key={ `variant-toolbar-${ variant.clientId }` }
-							className={ `altis-variant-toolbar altis-variant-toolbar--${ activeVariant === variant.clientId ? 'active' : 'inactive' }` }
-							controls={ controls }
-						>
-							<Button
-								isLink
-								onClick={ () => setVariant( variant.clientId ) }
-							>
-								{ `${ __( 'Variant' ) } ${ index + 1 }` }
-							</Button>
-						</Toolbar>
-					);
-				} ) }
 				<Toolbar
+					className="altis-variants-toolbar"
 					controls={ [
 						{
 							icon: 'plus',
 							title: __( 'Add a variant', 'altis-experiments' ),
-							isActive: false,
+							className: 'altis-add-variant-button',
 							onClick: () => {
-								const variantClientId = addVariant();
-								setVariant( variantClientId );
+								const newClientId = addVariant();
+								setVariant( newClientId );
 							},
 						},
 					] }
-				/>
+				>
+					{ variants.map( ( variant, index ) => (
+						<Button
+							key={ `variant-select-${ variant.clientId }` }
+							className={ `altis-variant-button components-icon-button has-text ${ activeVariant === variant.clientId && 'is-active' }` }
+							title={ __( 'Select variant', 'altis-experiments' ) }
+							onClick={ () => setVariant( variant.clientId ) }
+						>
+							{ sprintf( __( 'Variant %d', 'altis-experiments' ), index + 1 ) }
+						</Button>
+					) ) }
+				</Toolbar>
 			</BlockControls>
 			<InspectorControls>
 				{ variants.map( ( variant, index ) => {
@@ -141,12 +123,39 @@ const Edit = ( {
 				`,
 			} } />
 			<div className={ className }>
-				<div className="altis-experience-block-header">
-					{ __( 'Experience Block', 'altis-experiments' ) }
-					{ ' ・ ' }
-					{ __( 'Variant', 'altis-experiments' ) }
-					{ ' ' }
-					{ activeVariantIndex + 1 }
+				<div className="wp-core-ui altis-experience-block-header">
+					<span className="altis-experience-block-header__title">
+						{ __( 'Experience Block', 'altis-experiments' ) }
+						{ ' ・ ' }
+						{ sprintf( __( 'Variant %d', 'altis-experiments' ), activeVariantIndex + 1 ) }
+					</span>
+					{ isSelected && (
+						<div className="altis-experience-block-header__toolbar">
+							<IconButton
+								icon='migrate'
+								title={ __( 'Copy variant', 'altis-experiments' ) }
+								disabled={ variants.length < 1 }
+								onClick={ () => {
+									const newClientId = copyVariant( activeVariant );
+									setVariant( newClientId );
+								} }
+							>
+								{ __( 'Copy', 'altis-experiments' ) }
+							</IconButton>
+							<IconButton
+								icon='trash'
+								title={ __( 'Remove variant', 'altis-experiments' ) }
+								disabled={ variants.length < 2 }
+								onClick={ () => {
+									if ( !window.confirm( __( 'Are you sure you want to remove this variant?', 'altis-experiments' ) ) ) {
+										return;
+									}
+									setVariant( variants[ Math.max( 0, activeVariantIndex - 1 ) ].clientId );
+									removeVariant( activeVariant );
+								} }
+							/>
+						</div>
+					) }
 				</div>
 				<InnerBlocks
 					allowedBlocks={ ALLOWED_BLOCKS }
@@ -194,6 +203,29 @@ export default compose(
 				// Return new client ID to enable selection.
 				return newVariant.clientId;
 			},
+			copyVariant( variantClientId ) {
+				const { replaceInnerBlocks } = dispatch( 'core/block-editor' );
+				const {
+					getBlock,
+					getBlocks,
+					getBlockRootClientId,
+				} = registry.select( 'core/block-editor' );
+
+				const fromVariant = getBlock( variantClientId );
+				const newVariant = cloneBlock( fromVariant );
+
+				const experienceBlockClientId = getBlockRootClientId( variantClientId );
+				const variantBlocks = getBlocks( experienceBlockClientId );
+
+				const innerBlocks = [
+					...variantBlocks,
+					newVariant,
+				];
+
+				replaceInnerBlocks( experienceBlockClientId, innerBlocks );
+
+				return newVariant.clientId;
+			},
 			removeVariant( variantClientId ) {
 				const { clientId } = ownProps;
 				const { replaceInnerBlocks } = dispatch( 'core/block-editor' );

From 2ea9fb5002dcc7942d0128fb5fa56d53491a513a Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Sat, 16 May 2020 17:01:14 +0100
Subject: [PATCH 10/41] fix white space error

---
 inc/features/blocks/experience/edit.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/inc/features/blocks/experience/edit.js b/inc/features/blocks/experience/edit.js
index 37b5797..fc61e7e 100644
--- a/inc/features/blocks/experience/edit.js
+++ b/inc/features/blocks/experience/edit.js
@@ -147,7 +147,7 @@ const Edit = ( {
 								title={ __( 'Remove variant', 'altis-experiments' ) }
 								disabled={ variants.length < 2 }
 								onClick={ () => {
-									if ( !window.confirm( __( 'Are you sure you want to remove this variant?', 'altis-experiments' ) ) ) {
+									if ( ! window.confirm( __( 'Are you sure you want to remove this variant?', 'altis-experiments' ) ) ) {
 										return;
 									}
 									setVariant( variants[ Math.max( 0, activeVariantIndex - 1 ) ].clientId );

From 6110a33dc20e669c3491d6acead45a72acf8a392 Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Mon, 18 May 2020 10:56:10 +0100
Subject: [PATCH 11/41] switch to using webpack manifest plugin

---
 inc/features/blocks/experience/register.php |  12 +-
 inc/features/blocks/variant/register.php    |   8 +-
 inc/features/titles/namespace.php           |   7 +-
 inc/namespace.php                           |   6 +-
 inc/utils/namespace.php                     |  40 +++
 package-lock.json                           | 263 ++++++++++++++++++--
 package.json                                |   6 +-
 plugin.php                                  |   1 +
 webpack.config.js                           |  34 ++-
 9 files changed, 336 insertions(+), 41 deletions(-)
 create mode 100644 inc/utils/namespace.php

diff --git a/inc/features/blocks/experience/register.php b/inc/features/blocks/experience/register.php
index 909f0d2..f602601 100644
--- a/inc/features/blocks/experience/register.php
+++ b/inc/features/blocks/experience/register.php
@@ -3,12 +3,15 @@
  * Experience Block Server Side.
  *
  * @phpcs:ignoreFile HM.Files.FunctionFileName.WrongFile
+ *
+ * @package altis-experiments
  */
 
 namespace Altis\Experiments\Features\Blocks\Experience;
 
 use const Altis\Experiments\ROOT_DIR;
 use function Altis\Experiments\Features\Blocks\get_block_settings;
+use function Altis\Experiments\Utils\get_asset_url;
 
 const BLOCK = 'experience';
 
@@ -28,7 +31,7 @@ function setup() {
 function enqueue_assets() {
 	wp_enqueue_script(
 		'altis-experiments-features-blocks-experience',
-		plugins_url( 'build/features/blocks/experience.js', ROOT_DIR . '/plugin.php' ),
+		get_asset_url( 'features/blocks/experience.js' ),
 		[
 			'wp-plugins',
 			'wp-blocks',
@@ -40,13 +43,16 @@ function enqueue_assets() {
 			'altis-experiments-features-blocks-variant',
 			// Exports the audience UI modal component.
 			'altis-analytics-audience-ui',
-		]
+		],
+		null
 	);
 
 	// Queue up editor CSS.
 	wp_enqueue_style(
 		'altis-experiments-features-blocks-experience',
-		plugins_url( 'inc/features/blocks/experience/edit.css', ROOT_DIR . '/plugin.php' )
+		plugins_url( 'inc/features/blocks/experience/edit.css', ROOT_DIR . '/plugin.php' ),
+		[],
+		'2020-05-18-01'
 	);
 }
 
diff --git a/inc/features/blocks/variant/register.php b/inc/features/blocks/variant/register.php
index 35754b1..ab48115 100644
--- a/inc/features/blocks/variant/register.php
+++ b/inc/features/blocks/variant/register.php
@@ -3,12 +3,14 @@
  * Experience Block Server Side.
  *
  * @phpcs:ignoreFile HM.Files.FunctionFileName.WrongFile
+ *
+ * @package altis-experiments
  */
 
 namespace Altis\Experiments\Features\Blocks\Variant;
 
-use const Altis\Experiments\ROOT_DIR;
 use function Altis\Experiments\Features\Blocks\get_block_settings;
+use function Altis\Experiments\Utils\get_asset_url;
 
 const BLOCK = 'variant';
 
@@ -28,9 +30,9 @@ function setup() {
 function enqueue_assets() {
 	wp_enqueue_script(
 		'altis-experiments-features-blocks-variant',
-		plugins_url( 'build/features/blocks/variant.js', ROOT_DIR . '/plugin.php' ),
+		get_asset_url( 'features/blocks/variant.js' ),
 		[],
-		'2020-05-14-01'
+		null
 	);
 }
 
diff --git a/inc/features/titles/namespace.php b/inc/features/titles/namespace.php
index aef6f8a..5187619 100644
--- a/inc/features/titles/namespace.php
+++ b/inc/features/titles/namespace.php
@@ -7,9 +7,9 @@
 
 namespace Altis\Experiments\Features\Titles;
 
-use const Altis\Experiments\ROOT_DIR;
 use function Altis\Experiments\output_ab_test_html_for_post;
 use function Altis\Experiments\register_post_ab_test;
+use function Altis\Experiments\Utils\get_asset_url;
 
 /**
  * Bootstrap Title AB Tests Feature.
@@ -41,7 +41,7 @@ function admin_scripts( string $hook ) {
 
 	wp_enqueue_script(
 		'altis-experiments-features-titles',
-		plugins_url( 'build/features/titles.js', ROOT_DIR . '/plugin.php' ),
+		get_asset_url( 'features/titles.js' ),
 		[
 			'wp-plugins',
 			'wp-blocks',
@@ -51,7 +51,8 @@ function admin_scripts( string $hook ) {
 			'wp-core-data',
 			'wp-edit-post',
 			'moment',
-		]
+		],
+		null
 	);
 }
 
diff --git a/inc/namespace.php b/inc/namespace.php
index 2a0f651..6ee0418 100644
--- a/inc/namespace.php
+++ b/inc/namespace.php
@@ -3,7 +3,6 @@
  * AB Tests.
  *
  * @package altis-experiments
- *
  */
 
 namespace Altis\Experiments;
@@ -11,6 +10,7 @@
 use function Altis\Analytics\Utils\merge_aggregates;
 use function Altis\Analytics\Utils\milliseconds;
 use function Altis\Analytics\Utils\query;
+use function Altis\Experiments\Utils\get_asset_url;
 use MathPHP\Probability\Distribution\Discrete;
 use WP_Post;
 use WP_Query;
@@ -67,11 +67,11 @@ function enqueue_scripts() {
 
 	wp_enqueue_script(
 		'altis-experiments',
-		plugins_url( 'build/experiments.js', ROOT_DIR . '/plugin.php' ),
+		get_asset_url( 'experiments.js' ),
 		[
 			'altis-analytics',
 		],
-		'2020-05-12-01'
+		null
 	);
 
 	// Load async.
diff --git a/inc/utils/namespace.php b/inc/utils/namespace.php
new file mode 100644
index 0000000..f12cd3c
--- /dev/null
+++ b/inc/utils/namespace.php
@@ -0,0 +1,40 @@
+<?php
+/**
+ * Helper functions for the experiments plugin.
+ *
+ * @package altis-experiments
+ */
+
+namespace Altis\Experiments\Utils;
+
+use const Altis\Experiments\ROOT_DIR;
+
+/**
+ * Return asset file name based on generated manifest.json file.
+ *
+ * @param string $filename
+ * @return string|false
+ */
+function get_asset_url( string $filename ) {
+	$manifest_file = ROOT_DIR . '/build/manifest.json';
+
+	if ( ! file_exists( $manifest_file ) ) {
+		return false;
+	}
+
+	// phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents
+	$manifest = file_get_contents( $manifest_file );
+	$manifest = json_decode( $manifest, true );
+
+	if ( ! $manifest || ! isset( $manifest[ $filename ] ) ) {
+		return false;
+	}
+
+	$path = $manifest[ $filename ];
+
+	if ( strpos( $path, 'http' ) !== false ) {
+		return $path;
+	}
+
+	return plugins_url( $manifest[ $filename ], ROOT_DIR . '/build/assets' );
+}
diff --git a/package-lock.json b/package-lock.json
index 6999d4a..77c0127 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1077,12 +1077,104 @@
       "resolved": "https://registry.npmjs.org/@emotion/unitless/-/unitless-0.7.5.tgz",
       "integrity": "sha512-OWORNpfjMsSSUBVrRBVGECkhWcULOAJz9ZW8uK9qgxD+87M7jHRcvh/A96XXNhXTLmKcoYSQtBEX7lHMO7YRwg=="
     },
+    "@types/anymatch": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/@types/anymatch/-/anymatch-1.3.1.tgz",
+      "integrity": "sha512-/+CRPXpBDpo2RK9C68N3b2cOvO0Cf5B9aPijHsoDQTHivnGSObdOF2BRQOYjojWTDy6nQvMjmqRXIxH55VjxxA=="
+    },
     "@types/color-name": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/@types/color-name/-/color-name-1.1.1.tgz",
       "integrity": "sha512-rr+OQyAjxze7GgWrSaJwydHStIhHq2lvY3BOC2Mj7KnzI7XK0Uw1TOOdI9lDoajEbSWLiYgoo4f1R51erQfhPQ==",
       "dev": true
     },
+    "@types/events": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/@types/events/-/events-3.0.0.tgz",
+      "integrity": "sha512-EaObqwIvayI5a8dCzhFrjKzVwKLxjoG9T6Ppd5CEo07LRKfQ8Yokw54r5+Wq7FaBQ+yXRvQAYPrHwya1/UFt9g=="
+    },
+    "@types/glob": {
+      "version": "7.1.1",
+      "resolved": "https://registry.npmjs.org/@types/glob/-/glob-7.1.1.tgz",
+      "integrity": "sha512-1Bh06cbWJUHMC97acuD6UMG29nMt0Aqz1vF3guLfG+kHHJhy3AyohZFFxYk2f7Q1SQIrNwvncxAE0N/9s70F2w==",
+      "requires": {
+        "@types/events": "*",
+        "@types/minimatch": "*",
+        "@types/node": "*"
+      }
+    },
+    "@types/minimatch": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/@types/minimatch/-/minimatch-3.0.3.tgz",
+      "integrity": "sha512-tHq6qdbT9U1IRSGf14CL0pUlULksvY9OZ+5eEgl1N7t+OA3tGvNpxJCzuKQlsNgCVwbAs670L1vcVQi8j9HjnA=="
+    },
+    "@types/node": {
+      "version": "14.0.1",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-14.0.1.tgz",
+      "integrity": "sha512-FAYBGwC+W6F9+huFIDtn43cpy7+SzG+atzRiTfdp3inUKL2hXnd4rG8hylJLIh4+hqrQy1P17kvJByE/z825hA=="
+    },
+    "@types/source-list-map": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/@types/source-list-map/-/source-list-map-0.1.2.tgz",
+      "integrity": "sha512-K5K+yml8LTo9bWJI/rECfIPrGgxdpeNbj+d53lwN4QjW1MCwlkhUms+gtdzigTeUyBr09+u8BwOIY3MXvHdcsA=="
+    },
+    "@types/tapable": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/@types/tapable/-/tapable-1.0.5.tgz",
+      "integrity": "sha512-/gG2M/Imw7cQFp8PGvz/SwocNrmKFjFsm5Pb8HdbHkZ1K8pmuPzOX4VeVoiEecFCVf4CsN1r3/BRvx+6sNqwtQ=="
+    },
+    "@types/uglify-js": {
+      "version": "3.9.1",
+      "resolved": "https://registry.npmjs.org/@types/uglify-js/-/uglify-js-3.9.1.tgz",
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+    "webpack-manifest-plugin": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/webpack-manifest-plugin/-/webpack-manifest-plugin-2.2.0.tgz",
+      "integrity": "sha512-9S6YyKKKh/Oz/eryM1RyLVDVmy3NSPV0JXMRhZ18fJsq+AwGxUY34X54VNwkzYcEmEkDwNxuEOboCZEebJXBAQ==",
+      "requires": {
+        "fs-extra": "^7.0.0",
+        "lodash": ">=3.5 <5",
+        "object.entries": "^1.1.0",
+        "tapable": "^1.0.0"
+      }
+    },
     "webpack-sources": {
       "version": "1.4.3",
       "resolved": "https://registry.npmjs.org/webpack-sources/-/webpack-sources-1.4.3.tgz",
@@ -6917,6 +7132,14 @@
         }
       }
     },
+    "webpack-subresource-integrity": {
+      "version": "1.4.1",
+      "resolved": "https://registry.npmjs.org/webpack-subresource-integrity/-/webpack-subresource-integrity-1.4.1.tgz",
+      "integrity": "sha512-XMLFInbGbB1HV7K4vHWANzc1CN0t/c4bBvnlvGxGwV45yE/S/feAXIm8dJsCkzqWtSKnmaEgTp/meyeThxG4Iw==",
+      "requires": {
+        "webpack-sources": "^1.3.0"
+      }
+    },
     "which": {
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
diff --git a/package.json b/package.json
index b542201..29817e4 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,11 @@
     "styled-components": "^4.4.1",
     "webpack": "^4.43.0",
     "webpack-bundle-analyzer": "^3.7.0",
-    "webpack-cli": "^3.3.11"
+    "webpack-cli": "^3.3.11",
+    "webpack-manifest-plugin": "^2.2.0",
+    "webpack-subresource-integrity": "^1.4.0",
+    "dynamic-public-path-webpack-plugin": "^1.0.4",
+    "clean-webpack-plugin": "^3.0.0"
   },
   "devDependencies": {
     "@babel/plugin-proposal-class-properties": "^7.8.3",
diff --git a/plugin.php b/plugin.php
index aafdd8e..40e5d73 100644
--- a/plugin.php
+++ b/plugin.php
@@ -17,5 +17,6 @@
 }
 
 require_once 'inc/namespace.php';
+require_once 'inc/utils/namespace.php';
 
 add_action( 'plugins_loaded', __NAMESPACE__ . '\\setup', 11 );
diff --git a/webpack.config.js b/webpack.config.js
index f1540a2..a2969ab 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -3,6 +3,10 @@ const mode = process.env.NODE_ENV || 'production';
 const BundleAnalyzerPlugin = require( 'webpack-bundle-analyzer' )
 	.BundleAnalyzerPlugin;
 const EnvironmentPlugin = require( 'webpack' ).EnvironmentPlugin;
+const DynamicPublicPathPlugin = require( 'dynamic-public-path-webpack-plugin' );
+const SriPlugin = require( 'webpack-subresource-integrity' );
+const ManifestPlugin = require( 'webpack-manifest-plugin' );
+const { CleanWebpackPlugin } = require( 'clean-webpack-plugin' );
 
 const sharedConfig = {
 	mode: mode,
@@ -14,11 +18,12 @@ const sharedConfig = {
 	},
 	output: {
 		path: path.resolve( __dirname, 'build' ),
-		filename: '[name].js',
-		chunkFilename: '[name].chunk.js',
-		publicPath: '.',
+		filename: '[name].[hash:8].js',
+		chunkFilename: 'chunk.[id].[chunkhash:8].js',
+		publicPath: '/',
 		libraryTarget: 'this',
-		jsonpFunction: 'AltisABTestsJSONP',
+		jsonpFunction: 'AltisExperimentsJSONP',
+		crossOriginLoading: 'anonymous',
 	},
 	module: {
 		rules: [
@@ -49,11 +54,11 @@ const sharedConfig = {
 		new EnvironmentPlugin( {
 			SC_ATTR: 'altis-experiments',
 		} ),
+		new ManifestPlugin( {
+			writeToFileEmit: true,
+		} ),
+		new CleanWebpackPlugin(),
 	],
-	devtool:
-		mode === 'production'
-			? 'cheap-module-source-map'
-			: 'cheap-module-eval-source-map',
 	externals: {
 		'Altis': 'Altis',
 		'wp': 'wp',
@@ -63,6 +68,19 @@ const sharedConfig = {
 	},
 };
 
+if ( mode === 'production' ) {
+	sharedConfig.plugins.push( new DynamicPublicPathPlugin( {
+		externalGlobal: 'window.Altis.Analytics.Experiments.BuildURL',
+		chunkName: 'experiments',
+	} ) );
+	sharedConfig.plugins.push( new SriPlugin( {
+		hashFuncNames: [ 'sha384' ],
+		enabled: true,
+	} ) );
+} else {
+	sharedConfig.devtool = 'cheap-module-eval-source-map';
+}
+
 if ( process.env.ANALYSE_BUNDLE ) {
 	// Add bundle analyser.
 	sharedConfig.plugins.push( new BundleAnalyzerPlugin() );

From f5e68341af0920b2299ed578af27d92a46172608 Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Mon, 18 May 2020 11:13:39 +0100
Subject: [PATCH 12/41] Fix initial XB insert logic, innerBlocks template wasnt
 working

---
 inc/features/blocks/experience/edit.js | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/inc/features/blocks/experience/edit.js b/inc/features/blocks/experience/edit.js
index fc61e7e..6a0f105 100644
--- a/inc/features/blocks/experience/edit.js
+++ b/inc/features/blocks/experience/edit.js
@@ -47,7 +47,8 @@ const Edit = ( {
 } ) => {
 
 	// Track currently selected variant.
-	const [ activeVariant, setVariant ] = useState( variants[ 0 ].clientId );
+	const defaultVariantClientId = ( variants.length > 0 && variants[ 0 ].clientId ) || null;
+	const [ activeVariant, setVariant ] = useState( defaultVariantClientId );
 
 	// Track the active variant index to show in the title.
 	const activeVariantIndex = variants.findIndex( variant => variant.clientId === activeVariant );
@@ -174,6 +175,16 @@ export default compose(
 
 		const innerBlocks = getBlocks( clientId );
 
+		// Ensure at least one variant is present.
+		// Note TEMPLATE does not seem to have the desired effect every time.
+		if ( innerBlocks.length === 0 ) {
+			const initialVariant = createBlock( 'altis/experience-block-variant', {
+				parentId: clientId,
+				audience: null,
+			} );
+			innerBlocks.push( initialVariant );
+		}
+
 		return {
 			variants: innerBlocks,
 		};

From bb0b6e5a113fc2fad62788a9759e7cb06bd5e0ae Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Mon, 18 May 2020 12:32:28 +0100
Subject: [PATCH 13/41] Support for using audience names or fallback for
 variant

---
 inc/features/blocks/experience/edit.css |  7 +++--
 inc/features/blocks/experience/edit.js  | 30 ++++++++++++++++++--
 src/experiments.js                      | 37 +++++++++++++++++++------
 3 files changed, 59 insertions(+), 15 deletions(-)

diff --git a/inc/features/blocks/experience/edit.css b/inc/features/blocks/experience/edit.css
index b606498..df9950f 100644
--- a/inc/features/blocks/experience/edit.css
+++ b/inc/features/blocks/experience/edit.css
@@ -45,10 +45,9 @@
 
 .altis-variants-toolbar .altis-variant-button {
 	width: auto;
-	margin: 3px;
+	margin: 3px 3px 3px 0;
 	height: 30px;
 	line-height: 13px;
-	flex: 0 0 5.2em;
 }
 
 .altis-variants-toolbar .altis-variant-button.is-active,
@@ -56,7 +55,9 @@
 .altis-variants-toolbar .altis-variant-button.is-active:hover,
 .altis-variants-toolbar .altis-variant-button.is-pressed:hover,
 .altis-variants-toolbar .altis-variant-button.is-active:focus,
-.altis-variants-toolbar .altis-variant-button.is-pressed:focus {
+.altis-variants-toolbar .altis-variant-button.is-pressed:focus,
+.altis-variants-toolbar .altis-variant-button:not(:disabled):not([aria-disabled="true"]):not(.is-default).is-active,
+.altis-variants-toolbar .altis-variant-button:not(:disabled):not([aria-disabled="true"]):not(.is-default).is-pressed {
 	outline: none;
 	color: #fff;
 	box-shadow: none;
diff --git a/inc/features/blocks/experience/edit.js b/inc/features/blocks/experience/edit.js
index 6a0f105..e99992a 100644
--- a/inc/features/blocks/experience/edit.js
+++ b/inc/features/blocks/experience/edit.js
@@ -39,6 +39,7 @@ const Edit = ( {
 	className,
 	clientId,
 	copyVariant,
+	getAudience,
 	isSelected,
 	removeVariant,
 	setAttributes,
@@ -63,6 +64,22 @@ const Edit = ( {
 		} );
 	}
 
+	// Get the current variant name from the audience if available.
+	const getVariantName = ( index ) => {
+		const variant = variants[ index ];
+		if ( ! variant ) {
+			return sprintf( __( 'Variant %d', 'altis-experiments' ), index + 1 );
+		}
+		if ( ! variant.attributes.audience ) {
+			return __( 'Fallback', 'altis-experiments' );
+		}
+		const audience = getAudience( variant.attributes.audience );
+		if ( audience && audience.title && audience.title.rendered ) {
+			return audience.title.rendered;
+		}
+		return sprintf( __( 'Variant %d', 'altis-experiments' ), index + 1 );
+	}
+
 	return (
 		<Fragment>
 			<BlockControls>
@@ -87,7 +104,7 @@ const Edit = ( {
 							title={ __( 'Select variant', 'altis-experiments' ) }
 							onClick={ () => setVariant( variant.clientId ) }
 						>
-							{ sprintf( __( 'Variant %d', 'altis-experiments' ), index + 1 ) }
+							{ getVariantName( index ) }
 						</Button>
 					) ) }
 				</Toolbar>
@@ -97,7 +114,7 @@ const Edit = ( {
 					return (
 						<PanelBody
 							key={ `variant-settings-${ variant.clientId }` }
-							title={ `${ __( 'Variant', 'altis-experiments' ) } ${ index + 1 }` }
+							title={ getVariantName( index ) }
 						>
 							<AudiencePicker
 								label={ __( 'Audience' ) }
@@ -109,6 +126,11 @@ const Edit = ( {
 									setVariantAttributes( variant.clientId, { audience: null } );
 								} }
 							/>
+							{ ! variant.attributes.audience && (
+								<p className="description">
+									{ __( 'If no audience is selected this content will be used as a fallback.', 'altis-analytics' ) }
+								</p>
+							) }
 						</PanelBody>
 					);
 				} ) }
@@ -128,7 +150,7 @@ const Edit = ( {
 					<span className="altis-experience-block-header__title">
 						{ __( 'Experience Block', 'altis-experiments' ) }
 						{ ' ・ ' }
-						{ sprintf( __( 'Variant %d', 'altis-experiments' ), activeVariantIndex + 1 ) }
+						{ getVariantName( activeVariantIndex ) }
 					</span>
 					{ isSelected && (
 						<div className="altis-experience-block-header__toolbar">
@@ -172,6 +194,7 @@ export default compose(
 	withSelect( ( select, ownProps ) => {
 		const { clientId } = ownProps;
 		const { getBlocks } = select( 'core/block-editor' );
+		const { getPost: getAudience } = select( 'audience' );
 
 		const innerBlocks = getBlocks( clientId );
 
@@ -187,6 +210,7 @@ export default compose(
 
 		return {
 			variants: innerBlocks,
+			getAudience,
 		};
 	} ),
 	withDispatch( ( dispatch, ownProps, registry ) => {
diff --git a/src/experiments.js b/src/experiments.js
index 558609d..3873f22 100644
--- a/src/experiments.js
+++ b/src/experiments.js
@@ -253,25 +253,44 @@ class ExperienceBlock extends HTMLElement {
 		// Get associated templates.
 		const templates = document.querySelectorAll( `template[data-parent-id="${ this.clientId }"]` );
 
+		// Take the first fallback template if found.
+		let fallback = null;
+
+		// Track the audience for recording event later.
+		let audience = 0;
+
 		// Find a matching template.
 		for ( let index = 0; index < templates.length; index++ ) {
 			const template = templates[ index ];
-			const audience = Number( template.dataset.audience );
+			audience = Number( template.dataset.audience );
+			if ( audience === 0 && ! fallback ) {
+				fallback = template;
+			}
 			if ( audiences.indexOf( audience ) >= 0 ) {
+				// Unset fallback if we match an audience.
+				fallback = null;
+				// Populate experience block content.
 				const experience = template.content.cloneNode( true );
 				this.innerHTML = '';
 				this.appendChild( experience );
-
-				// Log an event for tracking views and audience.
-				window.Altis.Analytics.record( 'experienceView', {
-					attributes: {
-						clientId: this.clientId,
-						audience: audience,
-					},
-				} );
 				break;
 			}
 		}
+
+		// Set fallback content if one is available.
+		if ( fallback ) {
+			const experience = fallback.content.cloneNode( true );
+			this.innerHTML = '';
+			this.appendChild( experience );
+		}
+
+		// Log an event for tracking views and audience.
+		window.Altis.Analytics.record( 'experienceView', {
+			attributes: {
+				clientId: this.clientId,
+				audience: audience,
+			},
+		} );
 	}
 
 }

From 5589659e4a51e07fd8e7ca64bb40825c16847b90 Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Mon, 18 May 2020 12:49:42 +0100
Subject: [PATCH 14/41] fix linter errors

---
 inc/features/blocks/experience/edit.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/inc/features/blocks/experience/edit.js b/inc/features/blocks/experience/edit.js
index e99992a..5241b17 100644
--- a/inc/features/blocks/experience/edit.js
+++ b/inc/features/blocks/experience/edit.js
@@ -65,7 +65,7 @@ const Edit = ( {
 	}
 
 	// Get the current variant name from the audience if available.
-	const getVariantName = ( index ) => {
+	const getVariantName = index => {
 		const variant = variants[ index ];
 		if ( ! variant ) {
 			return sprintf( __( 'Variant %d', 'altis-experiments' ), index + 1 );
@@ -78,7 +78,7 @@ const Edit = ( {
 			return audience.title.rendered;
 		}
 		return sprintf( __( 'Variant %d', 'altis-experiments' ), index + 1 );
-	}
+	};
 
 	return (
 		<Fragment>

From 19ee037e0716017d64c7348260b9667888ab1fe4 Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Mon, 18 May 2020 13:50:29 +0100
Subject: [PATCH 15/41] Dont uppercase the XB header

---
 inc/features/blocks/experience/edit.css     | 1 -
 inc/features/blocks/experience/register.php | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/inc/features/blocks/experience/edit.css b/inc/features/blocks/experience/edit.css
index df9950f..9b7ffcf 100644
--- a/inc/features/blocks/experience/edit.css
+++ b/inc/features/blocks/experience/edit.css
@@ -3,7 +3,6 @@
  */
 
 .altis-experience-block-header {
-	text-transform: uppercase;
 	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
 	font-size: 16px;
 	background: repeating-linear-gradient(
diff --git a/inc/features/blocks/experience/register.php b/inc/features/blocks/experience/register.php
index f602601..647dc9b 100644
--- a/inc/features/blocks/experience/register.php
+++ b/inc/features/blocks/experience/register.php
@@ -52,7 +52,7 @@ function enqueue_assets() {
 		'altis-experiments-features-blocks-experience',
 		plugins_url( 'inc/features/blocks/experience/edit.css', ROOT_DIR . '/plugin.php' ),
 		[],
-		'2020-05-18-01'
+		'2020-05-18-02'
 	);
 }
 

From 67c2db3876bb9b5cc1edc317cbb7e68c89fdd70c Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Mon, 18 May 2020 15:57:51 +0100
Subject: [PATCH 16/41] Ensure custom elements are only defined when
 analytics.js has loaded

---
 src/experiments.js | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/experiments.js b/src/experiments.js
index 3873f22..18a639d 100644
--- a/src/experiments.js
+++ b/src/experiments.js
@@ -295,11 +295,17 @@ class ExperienceBlock extends HTMLElement {
 
 }
 
-// Define custom elements.
-window.customElements.define( 'ab-test', ABTest );
-window.customElements.define( 'experience-block', ExperienceBlock );
+// Define custom elements when analytics has loaded.
+window.Altis.Analytics.onReady( () => {
+	window.customElements.define( 'ab-test', ABTest );
+	window.customElements.define( 'experience-block', ExperienceBlock );
+} );
 
 // Expose ABTest methods.
 window.Altis.Analytics.Experiments = Object.assign( {}, window.Altis.Analytics.Experiments || {}, {
 	registerGoal: Test.registerGoal,
 } );
+
+// Fire a ready event once userland API has been exported.
+const readyEvent = new CustomEvent( 'altis.experiments.ready' );
+window.dispatchEvent( readyEvent );

From 0fe1fa2ec81a275b35e172b2a742436aabf75c81 Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Mon, 18 May 2020 17:29:55 +0100
Subject: [PATCH 17/41] expose `Test.registerGoal` before defining custom
 elements

---
 src/experiments.js | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/experiments.js b/src/experiments.js
index 18a639d..47fbfe1 100644
--- a/src/experiments.js
+++ b/src/experiments.js
@@ -295,17 +295,17 @@ class ExperienceBlock extends HTMLElement {
 
 }
 
+// Expose ABTest methods.
+window.Altis.Analytics.Experiments = Object.assign( {}, window.Altis.Analytics.Experiments || {}, {
+	registerGoal: Test.registerGoal,
+} );
+
 // Define custom elements when analytics has loaded.
 window.Altis.Analytics.onReady( () => {
 	window.customElements.define( 'ab-test', ABTest );
 	window.customElements.define( 'experience-block', ExperienceBlock );
 } );
 
-// Expose ABTest methods.
-window.Altis.Analytics.Experiments = Object.assign( {}, window.Altis.Analytics.Experiments || {}, {
-	registerGoal: Test.registerGoal,
-} );
-
 // Fire a ready event once userland API has been exported.
 const readyEvent = new CustomEvent( 'altis.experiments.ready' );
 window.dispatchEvent( readyEvent );

From 80b8b23045143b5356ed4ccb6d720f46d4f64284 Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Mon, 18 May 2020 19:14:29 +0100
Subject: [PATCH 18/41] Ensure BuildURL is defined for file chunks

---
 inc/features/blocks/experience/register.php | 12 ++++++++++++
 inc/features/blocks/variant/register.php    | 12 ++++++++++++
 inc/features/titles/namespace.php           | 12 ++++++++++++
 inc/namespace.php                           | 12 ++++++++++++
 4 files changed, 48 insertions(+)

diff --git a/inc/features/blocks/experience/register.php b/inc/features/blocks/experience/register.php
index 647dc9b..dbc0e4b 100644
--- a/inc/features/blocks/experience/register.php
+++ b/inc/features/blocks/experience/register.php
@@ -47,6 +47,18 @@ function enqueue_assets() {
 		null
 	);
 
+	wp_add_inline_script(
+		'altis-experiments-features-blocks-experience',
+		sprintf(
+			'window.Altis = window.Altis || {};' .
+			'window.Altis.Analytics = window.Altis.Analytics || {};' .
+			'window.Altis.Analytics.Experiments = window.Altis.Analytics.Experiments || {};' .
+			'window.Altis.Analytics.Experiments.BuildURL = %s;',
+			wp_json_encode( plugins_url( 'build', dirname( __FILE__, 4 ) ) )
+		),
+		'before'
+	);
+
 	// Queue up editor CSS.
 	wp_enqueue_style(
 		'altis-experiments-features-blocks-experience',
diff --git a/inc/features/blocks/variant/register.php b/inc/features/blocks/variant/register.php
index ab48115..74e42aa 100644
--- a/inc/features/blocks/variant/register.php
+++ b/inc/features/blocks/variant/register.php
@@ -34,6 +34,18 @@ function enqueue_assets() {
 		[],
 		null
 	);
+
+	wp_add_inline_script(
+		'altis-experiments-features-blocks-variant',
+		sprintf(
+			'window.Altis = window.Altis || {};' .
+			'window.Altis.Analytics = window.Altis.Analytics || {};' .
+			'window.Altis.Analytics.Experiments = window.Altis.Analytics.Experiments || {};' .
+			'window.Altis.Analytics.Experiments.BuildURL = %s;',
+			wp_json_encode( plugins_url( 'build', dirname( __FILE__, 4 ) ) )
+		),
+		'before'
+	);
 }
 
 /**
diff --git a/inc/features/titles/namespace.php b/inc/features/titles/namespace.php
index 5187619..04ebf46 100644
--- a/inc/features/titles/namespace.php
+++ b/inc/features/titles/namespace.php
@@ -54,6 +54,18 @@ function admin_scripts( string $hook ) {
 		],
 		null
 	);
+
+	wp_add_inline_script(
+		'altis-experiments-features-titles',
+		sprintf(
+			'window.Altis = window.Altis || {};' .
+			'window.Altis.Analytics = window.Altis.Analytics || {};' .
+			'window.Altis.Analytics.Experiments = window.Altis.Analytics.Experiments || {};' .
+			'window.Altis.Analytics.Experiments.BuildURL = %s;',
+			wp_json_encode( plugins_url( 'build', dirname( __FILE__, 3 ) ) )
+		),
+		'before'
+	);
 }
 
 /**
diff --git a/inc/namespace.php b/inc/namespace.php
index 6ee0418..c2bf0a9 100644
--- a/inc/namespace.php
+++ b/inc/namespace.php
@@ -74,6 +74,18 @@ function enqueue_scripts() {
 		null
 	);
 
+	wp_add_inline_script(
+		'altis-experiments',
+		sprintf(
+			'window.Altis = window.Altis || {};' .
+			'window.Altis.Analytics = window.Altis.Analytics || {};' .
+			'window.Altis.Analytics.Experiments = window.Altis.Analytics.Experiments || {};' .
+			'window.Altis.Analytics.Experiments.BuildURL = %s;',
+			wp_json_encode( plugins_url( 'build', dirname( __FILE__ ) ) )
+		),
+		'before'
+	);
+
 	// Load async.
 	$wp_scripts->add_data( 'altis-experiments', 'async', true );
 }

From 73b2a7fb4b78eeb546361dfa3f7184dc44790cfc Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Wed, 20 May 2020 10:01:52 +0100
Subject: [PATCH 19/41] Add missing docblocks and fix use statements

---
 inc/features/blocks/experience/register.php | 18 ++++++++++++------
 inc/features/blocks/namespace.php           | 14 ++++++++++++--
 inc/features/blocks/variant/register.php    | 14 ++++++++++----
 inc/utils/namespace.php                     | 10 +++++-----
 4 files changed, 39 insertions(+), 17 deletions(-)

diff --git a/inc/features/blocks/experience/register.php b/inc/features/blocks/experience/register.php
index dbc0e4b..80483d1 100644
--- a/inc/features/blocks/experience/register.php
+++ b/inc/features/blocks/experience/register.php
@@ -9,14 +9,17 @@
 
 namespace Altis\Experiments\Features\Blocks\Experience;
 
-use const Altis\Experiments\ROOT_DIR;
-use function Altis\Experiments\Features\Blocks\get_block_settings;
-use function Altis\Experiments\Utils\get_asset_url;
+use Altis\Experiments;
+use Altis\Experiments\Features\Blocks;
+use Altis\Experiments\Utils;
 
 const BLOCK = 'experience';
 
+/**
+ * Registers the block type assets and server side rendering.
+ */
 function setup() {
-	$block_data = get_block_settings( BLOCK );
+	$block_data = Blocks\get_block_settings( BLOCK );
 
 	// Queue up JS files.
 	add_action( 'enqueue_block_editor_assets', __NAMESPACE__ . '\\enqueue_assets' );
@@ -28,10 +31,13 @@ function setup() {
 	] );
 }
 
+/**
+ * Enqueues the block assets.
+ */
 function enqueue_assets() {
 	wp_enqueue_script(
 		'altis-experiments-features-blocks-experience',
-		get_asset_url( 'features/blocks/experience.js' ),
+		Utils\get_asset_url( 'features/blocks/experience.js' ),
 		[
 			'wp-plugins',
 			'wp-blocks',
@@ -62,7 +68,7 @@ function enqueue_assets() {
 	// Queue up editor CSS.
 	wp_enqueue_style(
 		'altis-experiments-features-blocks-experience',
-		plugins_url( 'inc/features/blocks/experience/edit.css', ROOT_DIR . '/plugin.php' ),
+		plugins_url( 'inc/features/blocks/experience/edit.css', Experiments\ROOT_DIR . '/plugin.php' ),
 		[],
 		'2020-05-18-02'
 	);
diff --git a/inc/features/blocks/namespace.php b/inc/features/blocks/namespace.php
index 383a697..c16a99c 100644
--- a/inc/features/blocks/namespace.php
+++ b/inc/features/blocks/namespace.php
@@ -1,10 +1,15 @@
 <?php
 /**
  * Experience Block functions.
+ *
+ * @package altis-experiments
  */
 
 namespace Altis\Experiments\Features\Blocks;
 
+/**
+ * Include and set up Experience Blocks.
+ */
 function setup() {
 	require_once __DIR__ . '/experience/register.php';
 	require_once __DIR__ . '/variant/register.php';
@@ -12,10 +17,15 @@ function setup() {
 	// Register blocks.
 	Experience\setup();
 	Variant\setup();
-
-	// Enqueue the audience UI JS in the editor.
 }
 
+/**
+ * Reads and returns a block.json file to pass shared settings
+ * between JS and PHP to the register blocks functions.
+ *
+ * @param string $name The directory name of the block relative to this file.
+ * @return array|null The JSON data as an associative array or null on error.
+ */
 function get_block_settings( string $name ) : ?array {
 	$json_path = __DIR__ . '/' . $name . '/block.json';
 
diff --git a/inc/features/blocks/variant/register.php b/inc/features/blocks/variant/register.php
index 74e42aa..c5c3f7c 100644
--- a/inc/features/blocks/variant/register.php
+++ b/inc/features/blocks/variant/register.php
@@ -9,13 +9,16 @@
 
 namespace Altis\Experiments\Features\Blocks\Variant;
 
-use function Altis\Experiments\Features\Blocks\get_block_settings;
-use function Altis\Experiments\Utils\get_asset_url;
+use Altis\Experiments\Features\Blocks;
+use Altis\Experiments\Utils;
 
 const BLOCK = 'variant';
 
+/**
+ * Registers the block type assets and server side rendering.
+ */
 function setup() {
-	$block_data = get_block_settings( BLOCK );
+	$block_data = Blocks\get_block_settings( BLOCK );
 
 	// Queue up JS files.
 	add_action( 'enqueue_block_editor_assets', __NAMESPACE__ . '\\enqueue_assets' );
@@ -27,10 +30,13 @@ function setup() {
 	] );
 }
 
+/**
+ * Enqueues the block assets.
+ */
 function enqueue_assets() {
 	wp_enqueue_script(
 		'altis-experiments-features-blocks-variant',
-		get_asset_url( 'features/blocks/variant.js' ),
+		Utils\get_asset_url( 'features/blocks/variant.js' ),
 		[],
 		null
 	);
diff --git a/inc/utils/namespace.php b/inc/utils/namespace.php
index f12cd3c..7f79a31 100644
--- a/inc/utils/namespace.php
+++ b/inc/utils/namespace.php
@@ -7,16 +7,16 @@
 
 namespace Altis\Experiments\Utils;
 
-use const Altis\Experiments\ROOT_DIR;
+use Altis\Experiments;
 
 /**
  * Return asset file name based on generated manifest.json file.
  *
- * @param string $filename
- * @return string|false
+ * @param string $filename The entrpoint filename used in webpack.config.js.
+ * @return string|false The URL of the generated asset file.
  */
 function get_asset_url( string $filename ) {
-	$manifest_file = ROOT_DIR . '/build/manifest.json';
+	$manifest_file = Experiments\ROOT_DIR . '/build/manifest.json';
 
 	if ( ! file_exists( $manifest_file ) ) {
 		return false;
@@ -36,5 +36,5 @@ function get_asset_url( string $filename ) {
 		return $path;
 	}
 
-	return plugins_url( $manifest[ $filename ], ROOT_DIR . '/build/assets' );
+	return plugins_url( $manifest[ $filename ], Experiments\ROOT_DIR . '/build/assets' );
 }

From 5366588ee74695b954da0101811525ebd71032e7 Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Fri, 22 May 2020 10:44:58 +0100
Subject: [PATCH 20/41] rename block to personalized content and add XB block
 category

---
 inc/features/blocks/experience/index.js       | 18 -------------
 inc/features/blocks/namespace.php             | 26 ++++++++++++++++---
 .../block.json                                |  8 +++---
 .../edit.js                                   |  0
 .../index.js                                  |  4 +--
 .../register.php                              | 16 ++++++------
 .../save.js                                   |  0
 .../block.json                                |  6 ++---
 .../{experience => personalization}/edit.css  |  0
 .../{experience => personalization}/edit.js   | 12 ++++-----
 inc/features/blocks/personalization/index.js  | 24 +++++++++++++++++
 .../register.php                              | 20 +++++++-------
 .../{variant => personalization}/save.js      |  0
 src/experiments.js                            |  5 ++--
 webpack.config.js                             |  4 +--
 15 files changed, 84 insertions(+), 59 deletions(-)
 delete mode 100644 inc/features/blocks/experience/index.js
 rename inc/features/blocks/{variant => personalization-variant}/block.json (69%)
 rename inc/features/blocks/{variant => personalization-variant}/edit.js (100%)
 rename inc/features/blocks/{variant => personalization-variant}/index.js (69%)
 rename inc/features/blocks/{variant => personalization-variant}/register.php (78%)
 rename inc/features/blocks/{experience => personalization-variant}/save.js (100%)
 rename inc/features/blocks/{experience => personalization}/block.json (69%)
 rename inc/features/blocks/{experience => personalization}/edit.css (100%)
 rename inc/features/blocks/{experience => personalization}/edit.js (95%)
 create mode 100644 inc/features/blocks/personalization/index.js
 rename inc/features/blocks/{experience => personalization}/register.php (78%)
 rename inc/features/blocks/{variant => personalization}/save.js (100%)

diff --git a/inc/features/blocks/experience/index.js b/inc/features/blocks/experience/index.js
deleted file mode 100644
index 4420ef5..0000000
--- a/inc/features/blocks/experience/index.js
+++ /dev/null
@@ -1,18 +0,0 @@
-import edit from './edit';
-import save from './save';
-
-import blockData from './block.json';
-
-const { registerBlockType } = wp.blocks;
-const { __ } = wp.i18n;
-
-const settings = {
-	title: __( 'Experience Block', 'altis-experiments' ),
-	description: __( 'Personalised content blocks', 'altis-experiments' ),
-	edit,
-	save,
-	...blockData.settings,
-};
-
-// Register block.
-registerBlockType( blockData.name, settings );
diff --git a/inc/features/blocks/namespace.php b/inc/features/blocks/namespace.php
index c16a99c..5ae5239 100644
--- a/inc/features/blocks/namespace.php
+++ b/inc/features/blocks/namespace.php
@@ -11,12 +11,30 @@
  * Include and set up Experience Blocks.
  */
 function setup() {
-	require_once __DIR__ . '/experience/register.php';
-	require_once __DIR__ . '/variant/register.php';
+	require_once __DIR__ . '/personalization/register.php';
+	require_once __DIR__ . '/personalization-variant/register.php';
 
 	// Register blocks.
-	Experience\setup();
-	Variant\setup();
+	Personalization\setup();
+	Personalization_Variant\setup();
+
+	// Register experience block category.
+	add_filter( 'block_categories', __NAMESPACE__ . '\\add_block_category', 9 );
+}
+
+/**
+ * Adds an experience block category to the block editor.
+ *
+ * @param array $categories Array of block editor block type categories.
+ * @return array The modified block categories array.
+ */
+function add_block_category( array $categories ) : array {
+	$categories[] = [
+		'slug' => 'altis-experience-blocks',
+		'title' => __( 'Experience Blocks', 'altis-experiments' ),
+	];
+
+	return $categories;
 }
 
 /**
diff --git a/inc/features/blocks/variant/block.json b/inc/features/blocks/personalization-variant/block.json
similarity index 69%
rename from inc/features/blocks/variant/block.json
rename to inc/features/blocks/personalization-variant/block.json
index ed37c18..82c82f5 100644
--- a/inc/features/blocks/variant/block.json
+++ b/inc/features/blocks/personalization-variant/block.json
@@ -1,9 +1,9 @@
 {
-    "name": "altis/experience-block-variant",
+    "name": "altis/personalization-variant",
     "settings": {
-        "category": "layout",
-        "icon": "lightbulb",
-        "parent": [ "altis/experience-block" ],
+        "category": "altis-experience-blocks",
+        "icon": "groups",
+        "parent": [ "altis/personalization" ],
         "supports": {
             "reusable": false,
             "html": false,
diff --git a/inc/features/blocks/variant/edit.js b/inc/features/blocks/personalization-variant/edit.js
similarity index 100%
rename from inc/features/blocks/variant/edit.js
rename to inc/features/blocks/personalization-variant/edit.js
diff --git a/inc/features/blocks/variant/index.js b/inc/features/blocks/personalization-variant/index.js
similarity index 69%
rename from inc/features/blocks/variant/index.js
rename to inc/features/blocks/personalization-variant/index.js
index 8109e06..238bad2 100644
--- a/inc/features/blocks/variant/index.js
+++ b/inc/features/blocks/personalization-variant/index.js
@@ -7,8 +7,8 @@ const { registerBlockType } = wp.blocks;
 const { __ } = wp.i18n;
 
 const settings = {
-	title: __( 'Experience Block Variant', 'altis-experiments' ),
-	description: __( 'Personalised content block items', 'altis-experiments' ),
+	title: __( 'Personalized Content Variant', 'altis-experiments' ),
+	description: __( 'Personalized content block items', 'altis-experiments' ),
 	edit,
 	save,
 	...blockData.settings,
diff --git a/inc/features/blocks/variant/register.php b/inc/features/blocks/personalization-variant/register.php
similarity index 78%
rename from inc/features/blocks/variant/register.php
rename to inc/features/blocks/personalization-variant/register.php
index c5c3f7c..f95e60a 100644
--- a/inc/features/blocks/variant/register.php
+++ b/inc/features/blocks/personalization-variant/register.php
@@ -1,18 +1,18 @@
 <?php
 /**
- * Experience Block Server Side.
+ * Personalization Variant Block Server Side.
  *
  * @phpcs:ignoreFile HM.Files.FunctionFileName.WrongFile
  *
  * @package altis-experiments
  */
 
-namespace Altis\Experiments\Features\Blocks\Variant;
+namespace Altis\Experiments\Features\Blocks\Personalization_Variant;
 
 use Altis\Experiments\Features\Blocks;
 use Altis\Experiments\Utils;
 
-const BLOCK = 'variant';
+const BLOCK = 'personalization-variant';
 
 /**
  * Registers the block type assets and server side rendering.
@@ -35,14 +35,14 @@ function setup() {
  */
 function enqueue_assets() {
 	wp_enqueue_script(
-		'altis-experiments-features-blocks-variant',
-		Utils\get_asset_url( 'features/blocks/variant.js' ),
+		'altis-experiments-features-blocks-personalization-variant',
+		Utils\get_asset_url( 'features/blocks/personalization-variant.js' ),
 		[],
 		null
 	);
 
 	wp_add_inline_script(
-		'altis-experiments-features-blocks-variant',
+		'altis-experiments-features-blocks-personalization-variant',
 		sprintf(
 			'window.Altis = window.Altis || {};' .
 			'window.Altis.Analytics = window.Altis.Analytics || {};' .
@@ -55,7 +55,7 @@ function enqueue_assets() {
 }
 
 /**
- * Render callback for the experience block.
+ * Render callback for the personalization variant block.
  *
  * Because this block only saves <InnerBlocks.Content> on the JS side,
  * the content string represents only the wrapped inner block markup.
@@ -69,7 +69,7 @@ function render_block( array $attributes, ?string $inner_content = '' ) : string
 	$audience = $attributes['audience'] ?? 0;
 
 	if ( ! $parent_id ) {
-		trigger_error( 'Experience block variant has no parent ID set.', E_USER_WARNING );
+		trigger_error( 'Personalization block variant has no parent ID set.', E_USER_WARNING );
 		return '';
 	}
 
diff --git a/inc/features/blocks/experience/save.js b/inc/features/blocks/personalization-variant/save.js
similarity index 100%
rename from inc/features/blocks/experience/save.js
rename to inc/features/blocks/personalization-variant/save.js
diff --git a/inc/features/blocks/experience/block.json b/inc/features/blocks/personalization/block.json
similarity index 69%
rename from inc/features/blocks/experience/block.json
rename to inc/features/blocks/personalization/block.json
index 1e54cb4..a0fdd58 100644
--- a/inc/features/blocks/experience/block.json
+++ b/inc/features/blocks/personalization/block.json
@@ -1,8 +1,8 @@
 {
-    "name": "altis/experience-block",
+    "name": "altis/personalization",
     "settings": {
-        "category": "layout",
-        "icon": "lightbulb",
+        "category": "altis-experience-blocks",
+        "icon": "groups",
         "supports": {
             "alignWide": true,
             "html": false,
diff --git a/inc/features/blocks/experience/edit.css b/inc/features/blocks/personalization/edit.css
similarity index 100%
rename from inc/features/blocks/experience/edit.css
rename to inc/features/blocks/personalization/edit.css
diff --git a/inc/features/blocks/experience/edit.js b/inc/features/blocks/personalization/edit.js
similarity index 95%
rename from inc/features/blocks/experience/edit.js
rename to inc/features/blocks/personalization/edit.js
index 5241b17..8c9f7b7 100644
--- a/inc/features/blocks/experience/edit.js
+++ b/inc/features/blocks/personalization/edit.js
@@ -22,13 +22,13 @@ const { sprintf, __ } = wp.i18n;
  * Only variants can be direct descendents so that we can generate
  * usable markup.
  */
-const ALLOWED_BLOCKS = [ 'altis/experience-block-variant' ];
+const ALLOWED_BLOCKS = [ 'altis/personalization-variant' ];
 
 /**
  * Start with a default template of one variant.
  */
 const TEMPLATE = [
-	[ 'altis/experience-block-variant' ],
+	[ 'altis/personalization-variant' ],
 ];
 
 // Audience picker input.
@@ -137,7 +137,7 @@ const Edit = ( {
 			</InspectorControls>
 			<style dangerouslySetInnerHTML={ {
 				__html: `
-					[data-block="${ clientId }"] [data-type="altis/experience-block-variant"] {
+					[data-block="${ clientId }"] [data-type="altis/personalization-variant"] {
 						display: none;
 					}
 					[data-block="${ clientId }"] #block-${ activeVariant } {
@@ -148,7 +148,7 @@ const Edit = ( {
 			<div className={ className }>
 				<div className="wp-core-ui altis-experience-block-header">
 					<span className="altis-experience-block-header__title">
-						{ __( 'Experience Block', 'altis-experiments' ) }
+						{ __( 'Personalized Content', 'altis-experiments' ) }
 						{ ' ・ ' }
 						{ getVariantName( activeVariantIndex ) }
 					</span>
@@ -201,7 +201,7 @@ export default compose(
 		// Ensure at least one variant is present.
 		// Note TEMPLATE does not seem to have the desired effect every time.
 		if ( innerBlocks.length === 0 ) {
-			const initialVariant = createBlock( 'altis/experience-block-variant', {
+			const initialVariant = createBlock( 'altis/personalization-variant', {
 				parentId: clientId,
 				audience: null,
 			} );
@@ -222,7 +222,7 @@ export default compose(
 
 				let innerBlocks = getBlocks( clientId );
 
-				const newVariant = createBlock( 'altis/experience-block-variant', {
+				const newVariant = createBlock( 'altis/personalization-variant', {
 					parentId: attributes.clientId,
 					audience: null,
 				} );
diff --git a/inc/features/blocks/personalization/index.js b/inc/features/blocks/personalization/index.js
new file mode 100644
index 0000000..f1531bd
--- /dev/null
+++ b/inc/features/blocks/personalization/index.js
@@ -0,0 +1,24 @@
+import edit from './edit';
+import save from './save';
+
+import blockData from './block.json';
+
+const { registerBlockType } = wp.blocks;
+const { __ } = wp.i18n;
+
+const settings = {
+	title: __( 'Personalized Content', 'altis-experiments' ),
+	description: __( 'Deliver personalized content to different audiences', 'altis-experiments' ),
+	keywords: [
+		__( 'experience', 'altis-experiments' ),
+		__( 'personalize', 'altis-experiments' ),
+		__( 'conditional', 'altis-experiments' ),
+		__( 'audience', 'altis-experiments' ),
+	],
+	edit,
+	save,
+	...blockData.settings,
+};
+
+// Register block.
+registerBlockType( blockData.name, settings );
diff --git a/inc/features/blocks/experience/register.php b/inc/features/blocks/personalization/register.php
similarity index 78%
rename from inc/features/blocks/experience/register.php
rename to inc/features/blocks/personalization/register.php
index 80483d1..1e3de84 100644
--- a/inc/features/blocks/experience/register.php
+++ b/inc/features/blocks/personalization/register.php
@@ -1,19 +1,19 @@
 <?php
 /**
- * Experience Block Server Side.
+ * Personalization Block Server Side.
  *
  * @phpcs:ignoreFile HM.Files.FunctionFileName.WrongFile
  *
  * @package altis-experiments
  */
 
-namespace Altis\Experiments\Features\Blocks\Experience;
+namespace Altis\Experiments\Features\Blocks\Personalization;
 
 use Altis\Experiments;
 use Altis\Experiments\Features\Blocks;
 use Altis\Experiments\Utils;
 
-const BLOCK = 'experience';
+const BLOCK = 'personalization';
 
 /**
  * Registers the block type assets and server side rendering.
@@ -36,8 +36,8 @@ function setup() {
  */
 function enqueue_assets() {
 	wp_enqueue_script(
-		'altis-experiments-features-blocks-experience',
-		Utils\get_asset_url( 'features/blocks/experience.js' ),
+		'altis-experiments-features-blocks-personalization',
+		Utils\get_asset_url( 'features/blocks/personalization.js' ),
 		[
 			'wp-plugins',
 			'wp-blocks',
@@ -46,7 +46,7 @@ function enqueue_assets() {
 			'wp-components',
 			'wp-core-data',
 			'wp-edit-post',
-			'altis-experiments-features-blocks-variant',
+			'altis-experiments-features-blocks-personalization-variant',
 			// Exports the audience UI modal component.
 			'altis-analytics-audience-ui',
 		],
@@ -67,8 +67,8 @@ function enqueue_assets() {
 
 	// Queue up editor CSS.
 	wp_enqueue_style(
-		'altis-experiments-features-blocks-experience',
-		plugins_url( 'inc/features/blocks/experience/edit.css', Experiments\ROOT_DIR . '/plugin.php' ),
+		'altis-experiments-features-blocks-personalization',
+		plugins_url( 'inc/features/blocks/personalization/edit.css', Experiments\ROOT_DIR . '/plugin.php' ),
 		[],
 		'2020-05-18-02'
 	);
@@ -95,12 +95,12 @@ function render_block( array $attributes, ?string $inner_content = '' ) : string
 	}
 
 	if ( ! $client_id ) {
-		trigger_error( 'Experience block has no client ID set.', E_USER_WARNING );
+		trigger_error( 'Personalization block has no client ID set.', E_USER_WARNING );
 		return '';
 	}
 
 	return sprintf(
-		'%s<experience-block class="%s" client-id="%s"></experience-block>',
+		'%s<personalization-block class="%s" client-id="%s"></personalization-block>',
 		$inner_content,
 		$class_name,
 		$client_id
diff --git a/inc/features/blocks/variant/save.js b/inc/features/blocks/personalization/save.js
similarity index 100%
rename from inc/features/blocks/variant/save.js
rename to inc/features/blocks/personalization/save.js
diff --git a/src/experiments.js b/src/experiments.js
index 47fbfe1..33c70a0 100644
--- a/src/experiments.js
+++ b/src/experiments.js
@@ -222,7 +222,7 @@ Test.registerGoal( 'click', ( element, record ) => {
 	} );
 }, [ 'a' ] );
 
-class ExperienceBlock extends HTMLElement {
+class PersonalizationBlock extends HTMLElement {
 
 	get clientId() {
 		return this.getAttribute( 'client-id' );
@@ -287,6 +287,7 @@ class ExperienceBlock extends HTMLElement {
 		// Log an event for tracking views and audience.
 		window.Altis.Analytics.record( 'experienceView', {
 			attributes: {
+				type: 'personalization',
 				clientId: this.clientId,
 				audience: audience,
 			},
@@ -303,7 +304,7 @@ window.Altis.Analytics.Experiments = Object.assign( {}, window.Altis.Analytics.E
 // Define custom elements when analytics has loaded.
 window.Altis.Analytics.onReady( () => {
 	window.customElements.define( 'ab-test', ABTest );
-	window.customElements.define( 'experience-block', ExperienceBlock );
+	window.customElements.define( 'personalization-block', PersonalizationBlock );
 } );
 
 // Fire a ready event once userland API has been exported.
diff --git a/webpack.config.js b/webpack.config.js
index a2969ab..913c0e8 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -12,8 +12,8 @@ const sharedConfig = {
 	mode: mode,
 	entry: {
 		'features/titles': path.resolve( __dirname, 'src/features/titles/index.js' ),
-		'features/blocks/experience': path.resolve( __dirname, 'inc/features/blocks/experience/index.js' ),
-		'features/blocks/variant': path.resolve( __dirname, 'inc/features/blocks/variant/index.js' ),
+		'features/blocks/personalization': path.resolve( __dirname, 'inc/features/blocks/personalization/index.js' ),
+		'features/blocks/personalization-variant': path.resolve( __dirname, 'inc/features/blocks/personalization-variant/index.js' ),
 		experiments: path.resolve( __dirname, 'src/experiments.js' ),
 	},
 	output: {

From d75ce8ff9ea544d6f9380b0c865e79df153a28c5 Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Fri, 22 May 2020 10:58:33 +0100
Subject: [PATCH 21/41] Improve personalised content block header styling for
 dark backgrounds

---
 inc/features/blocks/personalization/edit.css     | 8 ++++----
 inc/features/blocks/personalization/register.php | 2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/inc/features/blocks/personalization/edit.css b/inc/features/blocks/personalization/edit.css
index 9b7ffcf..204374a 100644
--- a/inc/features/blocks/personalization/edit.css
+++ b/inc/features/blocks/personalization/edit.css
@@ -9,8 +9,8 @@
 		315deg,
 		rgba(0, 0, 0, .05),
 		rgba(0, 0, 0, .05) 10px,
-		rgba(0, 0, 0, 0) 10px,
-		rgba(0, 0, 0, 0) 20px
+		rgba(255, 255, 255, .05) 10px,
+		rgba(255, 255, 255, .05) 20px
 	);
 	padding: 14px;
 	margin: 0 -14px -28px;
@@ -72,10 +72,10 @@
 	margin-bottom: 4px;
 }
 
-.wp-block[data-type="altis/experience-block-variant"] {
+.wp-block[data-type="altis/personalization-variant"] {
 	max-width: none;
 }
 
-.wp-block[data-type="altis/experience-block-variant"] .wp-block {
+.wp-block[data-type="altis/personalization-variant"] .wp-block {
 	max-width: none;
 }
diff --git a/inc/features/blocks/personalization/register.php b/inc/features/blocks/personalization/register.php
index 1e3de84..5d59fa3 100644
--- a/inc/features/blocks/personalization/register.php
+++ b/inc/features/blocks/personalization/register.php
@@ -70,7 +70,7 @@ function enqueue_assets() {
 		'altis-experiments-features-blocks-personalization',
 		plugins_url( 'inc/features/blocks/personalization/edit.css', Experiments\ROOT_DIR . '/plugin.php' ),
 		[],
-		'2020-05-18-02'
+		'2020-05-22-01'
 	);
 }
 

From 624fbace0f9de96cf58d6fb783d6c8c0d8fe1919 Mon Sep 17 00:00:00 2001
From: Ryan McCue <me@ryanmccue.info>
Date: Wed, 27 May 2020 14:07:49 +0100
Subject: [PATCH 22/41] Bind setContent to the current instance

---
 src/experiments.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/experiments.js b/src/experiments.js
index 33c70a0..2927b3e 100644
--- a/src/experiments.js
+++ b/src/experiments.js
@@ -247,7 +247,7 @@ class PersonalizationBlock extends HTMLElement {
 		window.Altis.Analytics.on( 'updateAudiences', this.setContent );
 	}
 
-	setContent() {
+	setContent = () => {
 		const audiences = window.Altis.Analytics.getAudiences();
 
 		// Get associated templates.

From bedb416b2a2439f93f8f93fdd1c75c7370eb57e3 Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Thu, 28 May 2020 18:06:56 +0100
Subject: [PATCH 23/41] Use explicit fallback block that cannot be removed

---
 inc/features/blocks/namespace.php             |   4 +-
 .../blocks/personalization-variant/block.json |   3 +
 .../personalization-variant/register.php      |  15 +-
 inc/features/blocks/personalization/edit.css  |   1 +
 inc/features/blocks/personalization/edit.js   | 138 +++++++++++++-----
 .../blocks/personalization/register.php       |  12 +-
 src/experiments.js                            |  48 +++---
 7 files changed, 160 insertions(+), 61 deletions(-)

diff --git a/inc/features/blocks/namespace.php b/inc/features/blocks/namespace.php
index 5ae5239..2b18f7c 100644
--- a/inc/features/blocks/namespace.php
+++ b/inc/features/blocks/namespace.php
@@ -49,7 +49,8 @@ function get_block_settings( string $name ) : ?array {
 
 	// Check name is valid.
 	if ( ! file_exists( $json_path ) ) {
-		trigger_error( 'Error reading %/block.json: file does not exist.', E_USER_WARNING );
+		// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
+		trigger_error( sprintf( 'Error reading %/block.json: file does not exist.', $name ), E_USER_WARNING );
 		return null;
 	}
 
@@ -61,6 +62,7 @@ function get_block_settings( string $name ) : ?array {
 
 	// Check JSON is valid.
 	if ( json_last_error() ) {
+		// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
 		trigger_error( sprintf( 'Error decoding %/block.json: %s', $name, json_last_error_msg() ), E_USER_WARNING );
 		return null;
 	}
diff --git a/inc/features/blocks/personalization-variant/block.json b/inc/features/blocks/personalization-variant/block.json
index 82c82f5..129708e 100644
--- a/inc/features/blocks/personalization-variant/block.json
+++ b/inc/features/blocks/personalization-variant/block.json
@@ -16,6 +16,9 @@
             },
             "audience": {
                 "type": "number"
+            },
+            "fallback": {
+                "type": "boolean"
             }
         }
     }
diff --git a/inc/features/blocks/personalization-variant/register.php b/inc/features/blocks/personalization-variant/register.php
index f95e60a..5400341 100644
--- a/inc/features/blocks/personalization-variant/register.php
+++ b/inc/features/blocks/personalization-variant/register.php
@@ -60,23 +60,32 @@ function enqueue_assets() {
  * Because this block only saves <InnerBlocks.Content> on the JS side,
  * the content string represents only the wrapped inner block markup.
  *
- * @param array  $attributes   The block's attributes object.
+ * @param array $attributes The block's attributes object.
  * @param string $innerContent The block's saved content.
  * @return string The final rendered block markup, as an HTML string.
  */
 function render_block( array $attributes, ?string $inner_content = '' ) : string {
 	$parent_id = $attributes['parentId'] ?? false;
 	$audience = $attributes['audience'] ?? 0;
+	$fallback = $attributes['fallback'] ?? false;
 
 	if ( ! $parent_id ) {
 		trigger_error( 'Personalization block variant has no parent ID set.', E_USER_WARNING );
 		return '';
 	}
 
+	if ( $fallback ) {
+		return sprintf(
+			'<template data-fallback data-parent-id="%s">%s</template>',
+			esc_attr( $parent_id ),
+			$inner_content
+		);
+	}
+
 	return sprintf(
 		'<template data-audience="%d" data-parent-id="%s">%s</template>',
-		$audience,
-		$parent_id,
+		esc_attr( $audience ),
+		esc_attr( $parent_id ),
 		$inner_content
 	);
 }
diff --git a/inc/features/blocks/personalization/edit.css b/inc/features/blocks/personalization/edit.css
index 204374a..fb4459a 100644
--- a/inc/features/blocks/personalization/edit.css
+++ b/inc/features/blocks/personalization/edit.css
@@ -47,6 +47,7 @@
 	margin: 3px 3px 3px 0;
 	height: 30px;
 	line-height: 13px;
+	flex-shrink: 0;
 }
 
 .altis-variants-toolbar .altis-variant-button.is-active,
diff --git a/inc/features/blocks/personalization/edit.js b/inc/features/blocks/personalization/edit.js
index 8c9f7b7..5d0bd1a 100644
--- a/inc/features/blocks/personalization/edit.js
+++ b/inc/features/blocks/personalization/edit.js
@@ -57,27 +57,34 @@ const Edit = ( {
 	// Set clientId attribute if not set.
 	if ( ! attributes.clientId ) {
 		setAttributes( { clientId } );
-		variants.forEach( variant => {
+	}
+
+	// Ensure variant parentId is correct.
+	variants.forEach( variant => {
+		if ( ! variant.attributes.parentId || variant.attributes.parentId !== attributes.clientId ) {
 			setVariantAttributes( variant.clientId, {
-				parentId: clientId,
+				parentId: attributes.clientId,
 			} );
-		} );
-	}
+		}
+	} );
 
 	// Get the current variant name from the audience if available.
 	const getVariantName = index => {
 		const variant = variants[ index ];
 		if ( ! variant ) {
-			return sprintf( __( 'Variant %d', 'altis-experiments' ), index + 1 );
+			return __( 'Unknown variant', 'altis-experiments' );
+		}
+		if ( variant.attributes.fallback ) {
+			return __( 'Fallback', 'altis-experiments' )
 		}
 		if ( ! variant.attributes.audience ) {
-			return __( 'Fallback', 'altis-experiments' );
+			return __( 'Select audience', 'altis-experiments' );
 		}
 		const audience = getAudience( variant.attributes.audience );
 		if ( audience && audience.title && audience.title.rendered ) {
 			return audience.title.rendered;
 		}
-		return sprintf( __( 'Variant %d', 'altis-experiments' ), index + 1 );
+		return __( 'Loading...', 'altis-experiments' );
 	};
 
 	return (
@@ -111,6 +118,19 @@ const Edit = ( {
 			</BlockControls>
 			<InspectorControls>
 				{ variants.map( ( variant, index ) => {
+					if ( variant.attributes.fallback ) {
+						return (
+							<PanelBody
+								key={ `variant-settings-${ variant.clientId }` }
+								title={ __( 'Fallback', 'altis-experiments' ) }
+							>
+								<p className="description">
+									{ __( 'This variant will be shown as a fallback if no audiences are matched. You can leave the content empty if you do not wish to show anything.', 'altis-experiments' ) }
+								</p>
+							</PanelBody>
+						);
+					}
+
 					return (
 						<PanelBody
 							key={ `variant-settings-${ variant.clientId }` }
@@ -128,7 +148,7 @@ const Edit = ( {
 							/>
 							{ ! variant.attributes.audience && (
 								<p className="description">
-									{ __( 'If no audience is selected this content will be used as a fallback.', 'altis-analytics' ) }
+									{ __( 'You must select an audience for this variant.', 'altis-experiments' ) }
 								</p>
 							) }
 						</PanelBody>
@@ -165,18 +185,21 @@ const Edit = ( {
 							>
 								{ __( 'Copy', 'altis-experiments' ) }
 							</IconButton>
-							<IconButton
-								icon='trash'
-								title={ __( 'Remove variant', 'altis-experiments' ) }
-								disabled={ variants.length < 2 }
-								onClick={ () => {
-									if ( ! window.confirm( __( 'Are you sure you want to remove this variant?', 'altis-experiments' ) ) ) {
-										return;
-									}
-									setVariant( variants[ Math.max( 0, activeVariantIndex - 1 ) ].clientId );
-									removeVariant( activeVariant );
-								} }
-							/>
+							{ activeVariant && ! variants[ activeVariantIndex ].attributes.fallback && (
+								<IconButton
+									icon='trash'
+									title={ __( 'Remove variant', 'altis-experiments' ) }
+									disabled={ variants.length < 2 }
+									onClick={ () => {
+										if ( activeVariantIndex === 0 ) {
+											setVariant( variants[ activeVariantIndex + 1 ].clientId );
+										} else {
+											setVariant( variants[ activeVariantIndex - 1 ].clientId );
+										}
+										removeVariant( activeVariant );
+									} }
+								/>
+							) }
 						</div>
 					) }
 				</div>
@@ -190,25 +213,58 @@ const Edit = ( {
 	);
 };
 
+/**
+ * Creates a new fallback variant block within the provided experience block clientId.
+ *
+ * @param {String} parentId The parent experience block client ID.
+ * @return The new fallback variant block.
+ */
+const createFallbackBlock = parentId => {
+	return createBlock( 'altis/personalization-variant', {
+		parentId,
+		audience: null,
+		fallback: true,
+	} );
+};
+
 export default compose(
 	withSelect( ( select, ownProps ) => {
-		const { clientId } = ownProps;
+		const { clientId, attributes } = ownProps;
 		const { getBlocks } = select( 'core/block-editor' );
 		const { getPost: getAudience } = select( 'audience' );
 
+		const parentClientId = attributes.clientId || clientId;
 		const innerBlocks = getBlocks( clientId );
 
-		// Ensure at least one variant is present.
+		// Ensure at least one variant is present as a fallback.
 		// Note TEMPLATE does not seem to have the desired effect every time.
 		if ( innerBlocks.length === 0 ) {
-			const initialVariant = createBlock( 'altis/personalization-variant', {
-				parentId: clientId,
-				audience: null,
+			const fallbackBlock = createFallbackBlock( parentClientId );
+			innerBlocks.push( fallbackBlock );
+		} else {
+			// Add a flag to check if we have a fallback explicitly set.
+			let hasFallback = false;
+			innerBlocks.forEach( block => {
+				if ( block.attributes.fallback ) {
+					hasFallback = block.clientId;
+				}
 			} );
-			innerBlocks.push( initialVariant );
+			if ( ! hasFallback ) {
+				const fallbackBlock = createFallbackBlock( parentClientId );
+				innerBlocks.push( fallbackBlock );
+			}
 		}
 
+		// Pre-fetch selected audiences for variants.
+		const audiences = [];
+		innerBlocks.forEach( block => {
+			if ( block.attributes.audience ) {
+				audiences.push( getAudience( block.attributes.audience ) );
+			}
+		} );
+
 		return {
+			audiences,
 			variants: innerBlocks,
 			getAudience,
 		};
@@ -227,9 +283,10 @@ export default compose(
 					audience: null,
 				} );
 
+				// Prepend the new variant.
 				innerBlocks = [
-					...innerBlocks,
 					newVariant,
+					...innerBlocks,
 				];
 
 				// Update the inner blocks.
@@ -246,26 +303,41 @@ export default compose(
 					getBlockRootClientId,
 				} = registry.select( 'core/block-editor' );
 
+				// Clone the the block but override the audience.
 				const fromVariant = getBlock( variantClientId );
-				const newVariant = cloneBlock( fromVariant );
+				const newVariant = cloneBlock( fromVariant, {
+					audience: null,
+					fallback: false,
+				} );
 
 				const experienceBlockClientId = getBlockRootClientId( variantClientId );
 				const variantBlocks = getBlocks( experienceBlockClientId );
+				const fromVariantIndex = variantBlocks.findIndex( variant => variant.clientId === variantClientId );
 
-				const innerBlocks = [
-					...variantBlocks,
-					newVariant,
-				];
+				let innerBlocks = variantBlocks;
+
+				// If we've copied the fallback then add it just before the fallback variant.
+				// Otherwise add it just after the source block.
+				if ( fromVariant.attributes.fallback ) {
+					innerBlocks.splice( fromVariantIndex, 0, newVariant );
+				} else {
+					innerBlocks.splice( fromVariantIndex + 1, 0, newVariant );
+				}
 
 				replaceInnerBlocks( experienceBlockClientId, innerBlocks );
 
 				return newVariant.clientId;
 			},
 			removeVariant( variantClientId ) {
-				const { clientId } = ownProps;
+				const { clientId, attributes } = ownProps;
 				const { replaceInnerBlocks } = dispatch( 'core/block-editor' );
 				const { getBlocks } = registry.select( 'core/block-editor' );
 
+				// Prevent removal of the fallback variant.
+				if ( attributes.fallback ) {
+					return;
+				}
+
 				let innerBlocks = getBlocks( clientId );
 
 				// Remove inner block by clientId.
diff --git a/inc/features/blocks/personalization/register.php b/inc/features/blocks/personalization/register.php
index 5d59fa3..8a7c406 100644
--- a/inc/features/blocks/personalization/register.php
+++ b/inc/features/blocks/personalization/register.php
@@ -80,11 +80,13 @@ function enqueue_assets() {
  * Because this block only saves <InnerBlocks.Content> on the JS side,
  * the content string represents only the wrapped inner block markup.
  *
- * @param array  $attributes   The block's attributes object.
+ * @param array $attributes The block's attributes object.
  * @param string $innerContent The block's saved content.
  * @return string The final rendered block markup, as an HTML string.
  */
 function render_block( array $attributes, ?string $inner_content = '' ) : string {
+	static $client_ids = [];
+
 	$client_id = $attributes['clientId'] ?? false;
 	$class_name = $attributes['className'] ?? '';
 	$align = $attributes['align'] ?? 'none';
@@ -99,6 +101,14 @@ function render_block( array $attributes, ?string $inner_content = '' ) : string
 		return '';
 	}
 
+	// No need to output templates twice for the same parent client ID.
+	// This can happen if a reusable block appears twice on a page.
+	if ( in_array( $client_id, $client_ids, true ) ) {
+		$inner_content = '';
+	} else {
+		$client_ids[] = $client_id;
+	}
+
 	return sprintf(
 		'%s<personalization-block class="%s" client-id="%s"></personalization-block>',
 		$inner_content,
diff --git a/src/experiments.js b/src/experiments.js
index 2927b3e..440166f 100644
--- a/src/experiments.js
+++ b/src/experiments.js
@@ -248,38 +248,40 @@ class PersonalizationBlock extends HTMLElement {
 	}
 
 	setContent = () => {
-		const audiences = window.Altis.Analytics.getAudiences();
+		const audiences = window.Altis.Analytics.getAudiences() || [];
 
-		// Get associated templates.
-		const templates = document.querySelectorAll( `template[data-parent-id="${ this.clientId }"]` );
+		// Track whether we need to use the fallback.
+		let fallback = true;
 
-		// Take the first fallback template if found.
-		let fallback = null;
-
-		// Track the audience for recording event later.
+		// Track the audience for recording an event later.
 		let audience = 0;
 
 		// Find a matching template.
-		for ( let index = 0; index < templates.length; index++ ) {
-			const template = templates[ index ];
-			audience = Number( template.dataset.audience );
-			if ( audience === 0 && ! fallback ) {
-				fallback = template;
-			}
-			if ( audiences.indexOf( audience ) >= 0 ) {
-				// Unset fallback if we match an audience.
-				fallback = null;
-				// Populate experience block content.
-				const experience = template.content.cloneNode( true );
-				this.innerHTML = '';
-				this.appendChild( experience );
-				break;
+		for ( let index = 0; index < audiences.length; index++ ) {
+			// Find the first matching audience template.
+			const template = document.querySelector( `template[data-audience="${ audiences[ index ] }"][data-parent-id="${ this.clientId }"]` );
+			if ( ! template ) {
+				continue;
 			}
+
+			// We have a matching template, update audience and fallback value.
+			audience = audiences[ index ];
+			fallback = false;
+
+			// Populate experience block content.
+			const experience = template.content.cloneNode( true );
+			this.innerHTML = '';
+			this.appendChild( experience );
+			break;
 		}
 
-		// Set fallback content if one is available.
+		// Set fallback content if needed.
 		if ( fallback ) {
-			const experience = fallback.content.cloneNode( true );
+			const template = document.querySelector( `template[data-fallback][data-parent-id="${ this.clientId }"]` );
+			if ( ! template ) {
+				return;
+			}
+			const experience = template.content.cloneNode( true );
 			this.innerHTML = '';
 			this.appendChild( experience );
 		}

From d5030423e0fd152e94f955bf91e7cd974bc89a94 Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Fri, 29 May 2020 12:53:51 +0100
Subject: [PATCH 24/41] compare `json_last_error()` to `JSON_ERROR_NONE`
 constant

Co-authored-by: Ryan McCue <me@ryanmccue.info>
---
 inc/features/blocks/namespace.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/inc/features/blocks/namespace.php b/inc/features/blocks/namespace.php
index 2b18f7c..941faf2 100644
--- a/inc/features/blocks/namespace.php
+++ b/inc/features/blocks/namespace.php
@@ -61,7 +61,7 @@ function get_block_settings( string $name ) : ?array {
 	$settings = json_decode( $json, ARRAY_A );
 
 	// Check JSON is valid.
-	if ( json_last_error() ) {
+	if ( json_last_error() !== JSON_ERROR_NONE ) {
 		// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
 		trigger_error( sprintf( 'Error decoding %/block.json: %s', $name, json_last_error_msg() ), E_USER_WARNING );
 		return null;

From 371ccf8dcaf16743043fb790c72e1c927c511d20 Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Fri, 29 May 2020 15:35:59 +0100
Subject: [PATCH 25/41] Pre fetch posts and only re-render XB when isLoading
 changes

---
 inc/features/blocks/personalization/edit.js | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/inc/features/blocks/personalization/edit.js b/inc/features/blocks/personalization/edit.js
index 5d0bd1a..632cb35 100644
--- a/inc/features/blocks/personalization/edit.js
+++ b/inc/features/blocks/personalization/edit.js
@@ -59,7 +59,7 @@ const Edit = ( {
 		setAttributes( { clientId } );
 	}
 
-	// Ensure variant parentId is correct.
+	// Ensure variant data is correct parentId is correct.
 	variants.forEach( variant => {
 		if ( ! variant.attributes.parentId || variant.attributes.parentId !== attributes.clientId ) {
 			setVariantAttributes( variant.clientId, {
@@ -231,7 +231,10 @@ export default compose(
 	withSelect( ( select, ownProps ) => {
 		const { clientId, attributes } = ownProps;
 		const { getBlocks } = select( 'core/block-editor' );
-		const { getPost: getAudience } = select( 'audience' );
+		const {
+			getPost: getAudience,
+			getIsLoading,
+		} = select( 'audience' );
 
 		const parentClientId = attributes.clientId || clientId;
 		const innerBlocks = getBlocks( clientId );
@@ -256,17 +259,19 @@ export default compose(
 		}
 
 		// Pre-fetch selected audiences for variants.
-		const audiences = [];
 		innerBlocks.forEach( block => {
 			if ( block.attributes.audience ) {
-				audiences.push( getAudience( block.attributes.audience ) );
+				getAudience( block.attributes.audience );
 			}
 		} );
 
+		// Provide a means of determining if an audience has been deleted or not.
+		const isLoading = getIsLoading();
+
 		return {
-			audiences,
-			variants: innerBlocks,
 			getAudience,
+			isLoading,
+			variants: innerBlocks,
 		};
 	} ),
 	withDispatch( ( dispatch, ownProps, registry ) => {

From a38ed58e186d0c677825874437cd953227b803d7 Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Fri, 29 May 2020 16:52:24 +0100
Subject: [PATCH 26/41] Use component for rendering variant title

---
 inc/features/blocks/personalization/edit.js | 79 +++++++++------------
 1 file changed, 35 insertions(+), 44 deletions(-)

diff --git a/inc/features/blocks/personalization/edit.js b/inc/features/blocks/personalization/edit.js
index 632cb35..812298a 100644
--- a/inc/features/blocks/personalization/edit.js
+++ b/inc/features/blocks/personalization/edit.js
@@ -15,8 +15,8 @@ const {
 	Toolbar,
 } = wp.components;
 const { compose } = wp.compose;
-const { withSelect, withDispatch } = wp.data;
-const { sprintf, __ } = wp.i18n;
+const { withSelect, withDispatch, useSelect } = wp.data;
+const { __ } = wp.i18n;
 
 /**
  * Only variants can be direct descendents so that we can generate
@@ -31,15 +31,41 @@ const TEMPLATE = [
 	[ 'altis/personalization-variant' ],
 ];
 
-// Audience picker input.
+// Component for fetching and displaying the variant title string.
+const VariantTitle = ( { variant } ) => {
+	const audience = useSelect( select => {
+		return select( 'audience' ).getPost( variant.attributes.audience );
+	}, [ variant.attributes.audience ] );
+	const isLoading = useSelect( select => {
+		return select( 'audience' ).getIsLoading();
+	}, [] );
+
+	if ( variant.attributes.fallback ) {
+		return __( 'Fallback', 'altis-experiments' );
+	}
+
+	if ( ! variant.attributes.audience ) {
+		return __( 'Select audience', 'altis-experiments' );
+	}
+
+	if ( audience && audience.title && audience.title.rendered ) {
+		return audience.title.rendered;
+	}
+
+	if ( isLoading ) {
+		return __( 'Loading...', 'altis-experiments' );
+	}
+
+	return '';
+}
 
+// Audience picker input.
 const Edit = ( {
 	addVariant,
 	attributes,
 	className,
 	clientId,
 	copyVariant,
-	getAudience,
 	isSelected,
 	removeVariant,
 	setAttributes,
@@ -68,25 +94,6 @@ const Edit = ( {
 		}
 	} );
 
-	// Get the current variant name from the audience if available.
-	const getVariantName = index => {
-		const variant = variants[ index ];
-		if ( ! variant ) {
-			return __( 'Unknown variant', 'altis-experiments' );
-		}
-		if ( variant.attributes.fallback ) {
-			return __( 'Fallback', 'altis-experiments' )
-		}
-		if ( ! variant.attributes.audience ) {
-			return __( 'Select audience', 'altis-experiments' );
-		}
-		const audience = getAudience( variant.attributes.audience );
-		if ( audience && audience.title && audience.title.rendered ) {
-			return audience.title.rendered;
-		}
-		return __( 'Loading...', 'altis-experiments' );
-	};
-
 	return (
 		<Fragment>
 			<BlockControls>
@@ -104,20 +111,20 @@ const Edit = ( {
 						},
 					] }
 				>
-					{ variants.map( ( variant, index ) => (
+					{ variants.map( variant => (
 						<Button
 							key={ `variant-select-${ variant.clientId }` }
 							className={ `altis-variant-button components-icon-button has-text ${ activeVariant === variant.clientId && 'is-active' }` }
 							title={ __( 'Select variant', 'altis-experiments' ) }
 							onClick={ () => setVariant( variant.clientId ) }
 						>
-							{ getVariantName( index ) }
+							<VariantTitle variant={ variant } />
 						</Button>
 					) ) }
 				</Toolbar>
 			</BlockControls>
 			<InspectorControls>
-				{ variants.map( ( variant, index ) => {
+				{ variants.map( variant => {
 					if ( variant.attributes.fallback ) {
 						return (
 							<PanelBody
@@ -134,7 +141,7 @@ const Edit = ( {
 					return (
 						<PanelBody
 							key={ `variant-settings-${ variant.clientId }` }
-							title={ getVariantName( index ) }
+							title={ <VariantTitle variant={ variant } /> }
 						>
 							<AudiencePicker
 								label={ __( 'Audience' ) }
@@ -170,7 +177,7 @@ const Edit = ( {
 					<span className="altis-experience-block-header__title">
 						{ __( 'Personalized Content', 'altis-experiments' ) }
 						{ ' ・ ' }
-						{ getVariantName( activeVariantIndex ) }
+						<VariantTitle variant={ variants[ activeVariantIndex ] } />
 					</span>
 					{ isSelected && (
 						<div className="altis-experience-block-header__toolbar">
@@ -231,10 +238,6 @@ export default compose(
 	withSelect( ( select, ownProps ) => {
 		const { clientId, attributes } = ownProps;
 		const { getBlocks } = select( 'core/block-editor' );
-		const {
-			getPost: getAudience,
-			getIsLoading,
-		} = select( 'audience' );
 
 		const parentClientId = attributes.clientId || clientId;
 		const innerBlocks = getBlocks( clientId );
@@ -258,19 +261,7 @@ export default compose(
 			}
 		}
 
-		// Pre-fetch selected audiences for variants.
-		innerBlocks.forEach( block => {
-			if ( block.attributes.audience ) {
-				getAudience( block.attributes.audience );
-			}
-		} );
-
-		// Provide a means of determining if an audience has been deleted or not.
-		const isLoading = getIsLoading();
-
 		return {
-			getAudience,
-			isLoading,
 			variants: innerBlocks,
 		};
 	} ),

From 588d44546dd821fd9be8e2fef392b27fb9c1eb5f Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Mon, 1 Jun 2020 17:36:50 +0100
Subject: [PATCH 27/41] Code review improvements

Reorganising code into additional smaller components.

Fix incorrect phpcs ignore directives.
---
 .../blocks/personalization-variant/edit.js    |  26 +-
 .../personalization-variant/register.php      |   5 +-
 inc/features/blocks/personalization/edit.js   | 307 ++++--------------
 .../blocks/personalization/register.php       |  13 +-
 4 files changed, 75 insertions(+), 276 deletions(-)

diff --git a/inc/features/blocks/personalization-variant/edit.js b/inc/features/blocks/personalization-variant/edit.js
index bf8f325..eb8fedc 100644
--- a/inc/features/blocks/personalization-variant/edit.js
+++ b/inc/features/blocks/personalization-variant/edit.js
@@ -1,4 +1,4 @@
-import React from 'react';
+import React, { useEffect } from 'react';
 
 const { InnerBlocks } = wp.blockEditor;
 const { compose } = wp.compose;
@@ -9,20 +9,20 @@ const Edit = ( {
 	isSelected,
 	selectParent,
 } ) => {
-	// Autofocus experience block variant parent on select.
-	if ( isSelected ) {
-		selectParent();
+	// Select the block parent if a variant is directly selected.
+	useEffect( () => {
+		if ( isSelected ) {
+			selectParent();
+		}
+	}, [ isSelected ] );
+
+	const props = {};
+	if ( ! hasChildBlocks ) {
+		// If we don't have any child blocks, show large block appender button.
+		props.renderAppender = () => <InnerBlocks.ButtonBlockAppender />;
 	}
 
-	return (
-		<InnerBlocks
-			renderAppender={
-				hasChildBlocks
-					? undefined
-					: () => <InnerBlocks.ButtonBlockAppender />
-			}
-		/>
-	);
+	return <InnerBlocks { ...props } />;
 };
 
 export default compose(
diff --git a/inc/features/blocks/personalization-variant/register.php b/inc/features/blocks/personalization-variant/register.php
index 5400341..d501a3d 100644
--- a/inc/features/blocks/personalization-variant/register.php
+++ b/inc/features/blocks/personalization-variant/register.php
@@ -2,7 +2,8 @@
 /**
  * Personalization Variant Block Server Side.
  *
- * @phpcs:ignoreFile HM.Files.FunctionFileName.WrongFile
+ * @phpcs:disable HM.Files.NamespaceDirectoryName.NameMismatch
+ * @phpcs:disable HM.Files.FunctionFileName.WrongFile
  *
  * @package altis-experiments
  */
@@ -74,6 +75,8 @@ function render_block( array $attributes, ?string $inner_content = '' ) : string
 		return '';
 	}
 
+	// If this is the fallback variant output the template with different attributes
+	// for easier and more specific targeting by document.querySelector().
 	if ( $fallback ) {
 		return sprintf(
 			'<template data-fallback data-parent-id="%s">%s</template>',
diff --git a/inc/features/blocks/personalization/edit.js b/inc/features/blocks/personalization/edit.js
index 812298a..e194640 100644
--- a/inc/features/blocks/personalization/edit.js
+++ b/inc/features/blocks/personalization/edit.js
@@ -1,21 +1,19 @@
-import React, { Fragment, useState } from 'react';
+import React, { Fragment, useEffect, useState } from 'react';
+import VariantTitle from './components/variant-title';
+import VariantPanel from './components/variant-panel';
+import VariantToolbar from './components/variant-toolbar';
 
-const { AudiencePicker } = Altis.Analytics.components;
+import withData from './data/edit';
 
 const {
 	BlockControls,
 	InnerBlocks,
 	InspectorControls,
 } = wp.blockEditor;
-const { createBlock, cloneBlock } = wp.blocks;
 const {
 	Button,
-	IconButton,
-	PanelBody,
 	Toolbar,
 } = wp.components;
-const { compose } = wp.compose;
-const { withSelect, withDispatch, useSelect } = wp.data;
 const { __ } = wp.i18n;
 
 /**
@@ -31,34 +29,6 @@ const TEMPLATE = [
 	[ 'altis/personalization-variant' ],
 ];
 
-// Component for fetching and displaying the variant title string.
-const VariantTitle = ( { variant } ) => {
-	const audience = useSelect( select => {
-		return select( 'audience' ).getPost( variant.attributes.audience );
-	}, [ variant.attributes.audience ] );
-	const isLoading = useSelect( select => {
-		return select( 'audience' ).getIsLoading();
-	}, [] );
-
-	if ( variant.attributes.fallback ) {
-		return __( 'Fallback', 'altis-experiments' );
-	}
-
-	if ( ! variant.attributes.audience ) {
-		return __( 'Select audience', 'altis-experiments' );
-	}
-
-	if ( audience && audience.title && audience.title.rendered ) {
-		return audience.title.rendered;
-	}
-
-	if ( isLoading ) {
-		return __( 'Loading...', 'altis-experiments' );
-	}
-
-	return '';
-}
-
 // Audience picker input.
 const Edit = ( {
 	addVariant,
@@ -72,7 +42,6 @@ const Edit = ( {
 	setVariantAttributes,
 	variants,
 } ) => {
-
 	// Track currently selected variant.
 	const defaultVariantClientId = ( variants.length > 0 && variants[ 0 ].clientId ) || null;
 	const [ activeVariant, setVariant ] = useState( defaultVariantClientId );
@@ -81,35 +50,52 @@ const Edit = ( {
 	const activeVariantIndex = variants.findIndex( variant => variant.clientId === activeVariant );
 
 	// Set clientId attribute if not set.
-	if ( ! attributes.clientId ) {
-		setAttributes( { clientId } );
-	}
+	useEffect( () => {
+		if ( ! attributes.clientId ) {
+			setAttributes( { clientId } );
+		}
+	}, [] );
+
+	// Ensure variant parentId is correct.
+	useEffect( () => {
+		variants.forEach( variant => {
+			if ( ! variant.attributes.parentId || variant.attributes.parentId !== attributes.clientId ) {
+				setVariantAttributes( variant.clientId, {
+					parentId: attributes.clientId,
+				} );
+			}
+		} );
+	}, [ attributes.clientId ] );
+
+	// Controls that appear before the variant selector buttons.
+	const variantsToolbarControls = [
+		{
+			icon: 'plus',
+			title: __( 'Add a variant', 'altis-experiments' ),
+			className: 'altis-add-variant-button',
+			onClick: () => {
+				const newClientId = addVariant();
+				setVariant( newClientId );
+			},
+		},
+	];
 
-	// Ensure variant data is correct parentId is correct.
-	variants.forEach( variant => {
-		if ( ! variant.attributes.parentId || variant.attributes.parentId !== attributes.clientId ) {
-			setVariantAttributes( variant.clientId, {
-				parentId: attributes.clientId,
-			} );
+	// When a variant is removed select the preceeding one along unless it's the first in the list.
+	const onRemove = () => {
+		if ( activeVariantIndex === 0 ) {
+			setVariant( variants[ activeVariantIndex + 1 ].clientId );
+		} else {
+			setVariant( variants[ activeVariantIndex - 1 ].clientId );
 		}
-	} );
+		removeVariant( activeVariant );
+	};
 
 	return (
 		<Fragment>
 			<BlockControls>
 				<Toolbar
 					className="altis-variants-toolbar"
-					controls={ [
-						{
-							icon: 'plus',
-							title: __( 'Add a variant', 'altis-experiments' ),
-							className: 'altis-add-variant-button',
-							onClick: () => {
-								const newClientId = addVariant();
-								setVariant( newClientId );
-							},
-						},
-					] }
+					controls={ variantsToolbarControls }
 				>
 					{ variants.map( variant => (
 						<Button
@@ -124,43 +110,12 @@ const Edit = ( {
 				</Toolbar>
 			</BlockControls>
 			<InspectorControls>
-				{ variants.map( variant => {
-					if ( variant.attributes.fallback ) {
-						return (
-							<PanelBody
-								key={ `variant-settings-${ variant.clientId }` }
-								title={ __( 'Fallback', 'altis-experiments' ) }
-							>
-								<p className="description">
-									{ __( 'This variant will be shown as a fallback if no audiences are matched. You can leave the content empty if you do not wish to show anything.', 'altis-experiments' ) }
-								</p>
-							</PanelBody>
-						);
-					}
-
-					return (
-						<PanelBody
-							key={ `variant-settings-${ variant.clientId }` }
-							title={ <VariantTitle variant={ variant } /> }
-						>
-							<AudiencePicker
-								label={ __( 'Audience' ) }
-								audience={ variant.attributes.audience }
-								onSelect={ audience => {
-									setVariantAttributes( variant.clientId, { audience: audience.id } );
-								} }
-								onClearSelection={ () => {
-									setVariantAttributes( variant.clientId, { audience: null } );
-								} }
-							/>
-							{ ! variant.attributes.audience && (
-								<p className="description">
-									{ __( 'You must select an audience for this variant.', 'altis-experiments' ) }
-								</p>
-							) }
-						</PanelBody>
-					);
-				} ) }
+				{ variants.map( variant => (
+					<VariantPanel
+						key={ `variant-settings-${ variant.clientId }` }
+						variant={ variant }
+					/>
+				) ) }
 			</InspectorControls>
 			<style dangerouslySetInnerHTML={ {
 				__html: `
@@ -180,34 +135,12 @@ const Edit = ( {
 						<VariantTitle variant={ variants[ activeVariantIndex ] } />
 					</span>
 					{ isSelected && (
-						<div className="altis-experience-block-header__toolbar">
-							<IconButton
-								icon='migrate'
-								title={ __( 'Copy variant', 'altis-experiments' ) }
-								disabled={ variants.length < 1 }
-								onClick={ () => {
-									const newClientId = copyVariant( activeVariant );
-									setVariant( newClientId );
-								} }
-							>
-								{ __( 'Copy', 'altis-experiments' ) }
-							</IconButton>
-							{ activeVariant && ! variants[ activeVariantIndex ].attributes.fallback && (
-								<IconButton
-									icon='trash'
-									title={ __( 'Remove variant', 'altis-experiments' ) }
-									disabled={ variants.length < 2 }
-									onClick={ () => {
-										if ( activeVariantIndex === 0 ) {
-											setVariant( variants[ activeVariantIndex + 1 ].clientId );
-										} else {
-											setVariant( variants[ activeVariantIndex - 1 ].clientId );
-										}
-										removeVariant( activeVariant );
-									} }
-								/>
-							) }
-						</div>
+						<VariantToolbar
+							canRemove={ variants.length > 1 }
+							isFallback={ activeVariant && variants[ activeVariantIndex ].attributes.fallback }
+							onCopy={ () => setVariant( copyVariant( activeVariant ) ) }
+							onRemove={ onRemove }
+						/>
 					) }
 				</div>
 				<InnerBlocks
@@ -220,132 +153,4 @@ const Edit = ( {
 	);
 };
 
-/**
- * Creates a new fallback variant block within the provided experience block clientId.
- *
- * @param {String} parentId The parent experience block client ID.
- * @return The new fallback variant block.
- */
-const createFallbackBlock = parentId => {
-	return createBlock( 'altis/personalization-variant', {
-		parentId,
-		audience: null,
-		fallback: true,
-	} );
-};
-
-export default compose(
-	withSelect( ( select, ownProps ) => {
-		const { clientId, attributes } = ownProps;
-		const { getBlocks } = select( 'core/block-editor' );
-
-		const parentClientId = attributes.clientId || clientId;
-		const innerBlocks = getBlocks( clientId );
-
-		// Ensure at least one variant is present as a fallback.
-		// Note TEMPLATE does not seem to have the desired effect every time.
-		if ( innerBlocks.length === 0 ) {
-			const fallbackBlock = createFallbackBlock( parentClientId );
-			innerBlocks.push( fallbackBlock );
-		} else {
-			// Add a flag to check if we have a fallback explicitly set.
-			let hasFallback = false;
-			innerBlocks.forEach( block => {
-				if ( block.attributes.fallback ) {
-					hasFallback = block.clientId;
-				}
-			} );
-			if ( ! hasFallback ) {
-				const fallbackBlock = createFallbackBlock( parentClientId );
-				innerBlocks.push( fallbackBlock );
-			}
-		}
-
-		return {
-			variants: innerBlocks,
-		};
-	} ),
-	withDispatch( ( dispatch, ownProps, registry ) => {
-		return {
-			addVariant() {
-				const { clientId, attributes } = ownProps;
-				const { replaceInnerBlocks } = dispatch( 'core/block-editor' );
-				const { getBlocks } = registry.select( 'core/block-editor' );
-
-				let innerBlocks = getBlocks( clientId );
-
-				const newVariant = createBlock( 'altis/personalization-variant', {
-					parentId: attributes.clientId,
-					audience: null,
-				} );
-
-				// Prepend the new variant.
-				innerBlocks = [
-					newVariant,
-					...innerBlocks,
-				];
-
-				// Update the inner blocks.
-				replaceInnerBlocks( clientId, innerBlocks );
-
-				// Return new client ID to enable selection.
-				return newVariant.clientId;
-			},
-			copyVariant( variantClientId ) {
-				const { replaceInnerBlocks } = dispatch( 'core/block-editor' );
-				const {
-					getBlock,
-					getBlocks,
-					getBlockRootClientId,
-				} = registry.select( 'core/block-editor' );
-
-				// Clone the the block but override the audience.
-				const fromVariant = getBlock( variantClientId );
-				const newVariant = cloneBlock( fromVariant, {
-					audience: null,
-					fallback: false,
-				} );
-
-				const experienceBlockClientId = getBlockRootClientId( variantClientId );
-				const variantBlocks = getBlocks( experienceBlockClientId );
-				const fromVariantIndex = variantBlocks.findIndex( variant => variant.clientId === variantClientId );
-
-				let innerBlocks = variantBlocks;
-
-				// If we've copied the fallback then add it just before the fallback variant.
-				// Otherwise add it just after the source block.
-				if ( fromVariant.attributes.fallback ) {
-					innerBlocks.splice( fromVariantIndex, 0, newVariant );
-				} else {
-					innerBlocks.splice( fromVariantIndex + 1, 0, newVariant );
-				}
-
-				replaceInnerBlocks( experienceBlockClientId, innerBlocks );
-
-				return newVariant.clientId;
-			},
-			removeVariant( variantClientId ) {
-				const { clientId, attributes } = ownProps;
-				const { replaceInnerBlocks } = dispatch( 'core/block-editor' );
-				const { getBlocks } = registry.select( 'core/block-editor' );
-
-				// Prevent removal of the fallback variant.
-				if ( attributes.fallback ) {
-					return;
-				}
-
-				let innerBlocks = getBlocks( clientId );
-
-				// Remove inner block by clientId.
-				innerBlocks = innerBlocks.filter( block => block.clientId !== variantClientId );
-
-				// Update the inner blocks.
-				replaceInnerBlocks( clientId, innerBlocks );
-			},
-			setVariantAttributes( variantClientId, attributes ) {
-				const { updateBlockAttributes } = dispatch( 'core/block-editor' );
-				updateBlockAttributes( variantClientId, attributes );
-			},
-		};
-	} ),
-)( Edit );
+export default withData( Edit );
diff --git a/inc/features/blocks/personalization/register.php b/inc/features/blocks/personalization/register.php
index 8a7c406..0afc97b 100644
--- a/inc/features/blocks/personalization/register.php
+++ b/inc/features/blocks/personalization/register.php
@@ -2,7 +2,8 @@
 /**
  * Personalization Block Server Side.
  *
- * @phpcs:ignoreFile HM.Files.FunctionFileName.WrongFile
+ * @phpcs:disable HM.Files.NamespaceDirectoryName.NameMismatch
+ * @phpcs:disable HM.Files.FunctionFileName.WrongFile
  *
  * @package altis-experiments
  */
@@ -85,8 +86,6 @@ function enqueue_assets() {
  * @return string The final rendered block markup, as an HTML string.
  */
 function render_block( array $attributes, ?string $inner_content = '' ) : string {
-	static $client_ids = [];
-
 	$client_id = $attributes['clientId'] ?? false;
 	$class_name = $attributes['className'] ?? '';
 	$align = $attributes['align'] ?? 'none';
@@ -101,14 +100,6 @@ function render_block( array $attributes, ?string $inner_content = '' ) : string
 		return '';
 	}
 
-	// No need to output templates twice for the same parent client ID.
-	// This can happen if a reusable block appears twice on a page.
-	if ( in_array( $client_id, $client_ids, true ) ) {
-		$inner_content = '';
-	} else {
-		$client_ids[] = $client_id;
-	}
-
 	return sprintf(
 		'%s<personalization-block class="%s" client-id="%s"></personalization-block>',
 		$inner_content,

From 5e20d29b0556884da8cbef229c46714951532f05 Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Mon, 1 Jun 2020 17:37:34 +0100
Subject: [PATCH 28/41] Commit new component files

---
 .../components/variant-panel.js               |  42 ++++++
 .../components/variant-title.js               |  32 +++++
 .../components/variant-toolbar.js             |  35 +++++
 .../blocks/personalization/data/edit.js       | 132 ++++++++++++++++++
 4 files changed, 241 insertions(+)
 create mode 100644 inc/features/blocks/personalization/components/variant-panel.js
 create mode 100644 inc/features/blocks/personalization/components/variant-title.js
 create mode 100644 inc/features/blocks/personalization/components/variant-toolbar.js
 create mode 100644 inc/features/blocks/personalization/data/edit.js

diff --git a/inc/features/blocks/personalization/components/variant-panel.js b/inc/features/blocks/personalization/components/variant-panel.js
new file mode 100644
index 0000000..f1cc782
--- /dev/null
+++ b/inc/features/blocks/personalization/components/variant-panel.js
@@ -0,0 +1,42 @@
+import React from 'react';
+import VariantTitle from './variant-title';
+
+const { AudiencePicker } = Altis.Analytics.components;
+
+const { PanelBody } = wp.components;
+const { useDispatch } = wp.data;
+const { __ } = wp.i18n;
+
+const VariantPanel = ( {
+	variant,
+} ) => {
+	const { updateBlockAttributes } = useDispatch( 'core/block-editor' );
+
+	if ( variant.attributes.fallback ) {
+		return (
+			<PanelBody title={ __( 'Fallback', 'altis-experiments' ) }>
+				<p className="description">
+					{ __( 'This variant will be shown as a fallback if no audiences are matched. You can leave the content empty if you do not wish to show anything.', 'altis-experiments' ) }
+				</p>
+			</PanelBody>
+		);
+	}
+
+	return (
+		<PanelBody title={ <VariantTitle variant={ variant } /> }>
+			<AudiencePicker
+				label={ __( 'Audience' ) }
+				audience={ variant.attributes.audience }
+				onSelect={ audience => updateBlockAttributes( variant.clientId, { audience: audience.id } ) }
+				onClearSelection={ () => updateBlockAttributes( variant.clientId, { audience: null } ) }
+			/>
+			{ ! variant.attributes.audience && (
+				<p className="description">
+					{ __( 'You must select an audience for this variant.', 'altis-experiments' ) }
+				</p>
+			) }
+		</PanelBody>
+	);
+}
+
+export default VariantPanel;
diff --git a/inc/features/blocks/personalization/components/variant-title.js b/inc/features/blocks/personalization/components/variant-title.js
new file mode 100644
index 0000000..75119dc
--- /dev/null
+++ b/inc/features/blocks/personalization/components/variant-title.js
@@ -0,0 +1,32 @@
+const { useSelect } = wp.data;
+const { __ } = wp.i18n;
+
+// Component for fetching and displaying the variant title string.
+const VariantTitle = ( { variant } ) => {
+	const audience = useSelect( select => {
+		return select( 'audience' ).getPost( variant.attributes.audience );
+	}, [ variant.attributes.audience ] );
+	const isLoading = useSelect( select => {
+		return select( 'audience' ).getIsLoading();
+	}, [] );
+
+	if ( variant.attributes.fallback ) {
+		return __( 'Fallback', 'altis-experiments' );
+	}
+
+	if ( ! variant.attributes.audience ) {
+		return __( 'Select audience', 'altis-experiments' );
+	}
+
+	if ( audience && audience.title && audience.title.rendered ) {
+		return audience.title.rendered;
+	}
+
+	if ( isLoading ) {
+		return __( 'Loading...', 'altis-experiments' );
+	}
+
+	return '';
+};
+
+export default VariantTitle;
diff --git a/inc/features/blocks/personalization/components/variant-toolbar.js b/inc/features/blocks/personalization/components/variant-toolbar.js
new file mode 100644
index 0000000..f2ab79f
--- /dev/null
+++ b/inc/features/blocks/personalization/components/variant-toolbar.js
@@ -0,0 +1,35 @@
+import React from 'react';
+
+const { IconButton } = wp.components;
+const { __ } = wp.i18n;
+
+const VariantToolbar = props => {
+	const {
+		canRemove,
+		isFallback,
+		onCopy,
+		onRemove,
+	} = props;
+
+	return (
+		<div className="altis-experience-block-header__toolbar">
+			<IconButton
+				icon='migrate'
+				title={ __( 'Copy variant', 'altis-experiments' ) }
+				onClick={ onCopy }
+			>
+				{ __( 'Copy', 'altis-experiments' ) }
+			</IconButton>
+			{ ! isFallback && (
+				<IconButton
+					icon='trash'
+					title={ __( 'Remove variant', 'altis-experiments' ) }
+					disabled={ ! canRemove }
+					onClick={ onRemove }
+				/>
+			) }
+		</div>
+	)
+};
+
+export default VariantToolbar;
diff --git a/inc/features/blocks/personalization/data/edit.js b/inc/features/blocks/personalization/data/edit.js
new file mode 100644
index 0000000..1e4ef52
--- /dev/null
+++ b/inc/features/blocks/personalization/data/edit.js
@@ -0,0 +1,132 @@
+const { createBlock, cloneBlock } = wp.blocks;
+const { compose } = wp.compose;
+const { withSelect, withDispatch } = wp.data;
+
+/**
+ * Creates a new fallback variant block within the provided experience block clientId.
+ *
+ * @param {String} parentId The parent experience block client ID.
+ * @return The new fallback variant block.
+ */
+const createFallbackBlock = parentId => {
+	return createBlock( 'altis/personalization-variant', {
+		parentId,
+		audience: null,
+		fallback: true,
+	} );
+};
+
+/**
+ * Returns an upgraded React Component with data store connectors.
+ *
+ * @param {React.Component} Component
+ * @return React.Component
+ */
+const withData = Component => compose(
+	withSelect( ( select, ownProps ) => {
+		const { clientId, attributes } = ownProps;
+		const { getBlocks } = select( 'core/block-editor' );
+
+		const parentClientId = attributes.clientId || clientId;
+		const innerBlocks = getBlocks( clientId );
+
+		// Ensure at least one variant is present as a fallback.
+		// Note TEMPLATE does not seem to have the desired effect every time.
+		if ( innerBlocks.length === 0 ) {
+			const fallbackBlock = createFallbackBlock( parentClientId );
+			innerBlocks.push( fallbackBlock );
+		} else {
+			// Add a flag to check if we have a fallback explicitly set.
+			const hasFallback = innerBlocks.find( block => block.attributes.fallback );
+			if ( ! hasFallback ) {
+				const fallbackBlock = createFallbackBlock( parentClientId );
+				innerBlocks.push( fallbackBlock );
+			}
+		}
+
+		return {
+			variants: innerBlocks,
+		};
+	} ),
+	withDispatch( ( dispatch, ownProps, registry ) => {
+		return {
+			addVariant() {
+				const { clientId, attributes } = ownProps;
+				const { replaceInnerBlocks } = dispatch( 'core/block-editor' );
+				const { getBlocks } = registry.select( 'core/block-editor' );
+
+				const newVariant = createBlock( 'altis/personalization-variant', {
+					parentId: attributes.clientId,
+					audience: null,
+				} );
+
+				// Prepend the new variant.
+				const innerBlocks = [
+					newVariant,
+					...getBlocks( clientId ),
+				];
+
+				// Update the inner blocks.
+				replaceInnerBlocks( clientId, innerBlocks );
+
+				// Return new client ID to enable selection.
+				return newVariant.clientId;
+			},
+			copyVariant( variantClientId ) {
+				const { replaceInnerBlocks } = dispatch( 'core/block-editor' );
+				const {
+					getBlock,
+					getBlocks,
+					getBlockRootClientId,
+				} = registry.select( 'core/block-editor' );
+
+				// Clone the the block but override the audience.
+				const fromVariant = getBlock( variantClientId );
+				const newVariant = cloneBlock( fromVariant, {
+					audience: null,
+					fallback: false,
+				} );
+
+				const experienceBlockClientId = getBlockRootClientId( variantClientId );
+				const variantBlocks = getBlocks( experienceBlockClientId );
+				const fromVariantIndex = variantBlocks.findIndex( variant => variant.clientId === variantClientId );
+
+				// If we've copied the fallback then add it just before the fallback variant.
+				// Otherwise add it just after the source block.
+				const fromIndex = fromVariant.attributes.fallback ? fromVariantIndex : fromVariantIndex + 1;
+
+				const nextBlocks = [
+					...variantBlocks.slice( 0, fromIndex ),
+					newVariant,
+					...variantBlocks.slice( fromIndex ),
+				];
+
+				replaceInnerBlocks( experienceBlockClientId, nextBlocks );
+
+				return newVariant.clientId;
+			},
+			removeVariant( variantClientId ) {
+				const { clientId, attributes } = ownProps;
+				const { replaceInnerBlocks } = dispatch( 'core/block-editor' );
+				const { getBlocks } = registry.select( 'core/block-editor' );
+
+				// Prevent removal of the fallback variant.
+				if ( attributes.fallback ) {
+					return;
+				}
+
+				// Remove inner block by clientId.
+				const innerBlocks = getBlocks( clientId ).filter( block => block.clientId !== variantClientId );
+
+				// Update the inner blocks.
+				replaceInnerBlocks( clientId, innerBlocks );
+			},
+			setVariantAttributes( variantClientId, attributes ) {
+				const { updateBlockAttributes } = dispatch( 'core/block-editor' );
+				updateBlockAttributes( variantClientId, attributes );
+			},
+		};
+	} ),
+)( Component );
+
+export default withData;

From f6db732eb281406fad43989cdf9cfe51e91dbcd2 Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Mon, 1 Jun 2020 17:44:20 +0100
Subject: [PATCH 29/41] Check if audience is set on client side rather than
 fallback var

---
 src/experiments.js | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/src/experiments.js b/src/experiments.js
index 440166f..2571569 100644
--- a/src/experiments.js
+++ b/src/experiments.js
@@ -250,9 +250,6 @@ class PersonalizationBlock extends HTMLElement {
 	setContent = () => {
 		const audiences = window.Altis.Analytics.getAudiences() || [];
 
-		// Track whether we need to use the fallback.
-		let fallback = true;
-
 		// Track the audience for recording an event later.
 		let audience = 0;
 
@@ -266,7 +263,6 @@ class PersonalizationBlock extends HTMLElement {
 
 			// We have a matching template, update audience and fallback value.
 			audience = audiences[ index ];
-			fallback = false;
 
 			// Populate experience block content.
 			const experience = template.content.cloneNode( true );
@@ -276,7 +272,7 @@ class PersonalizationBlock extends HTMLElement {
 		}
 
 		// Set fallback content if needed.
-		if ( fallback ) {
+		if ( ! audience ) {
 			const template = document.querySelector( `template[data-fallback][data-parent-id="${ this.clientId }"]` );
 			if ( ! template ) {
 				return;

From a7f54aeed6b64c6d667cbc4610f83c23f64edf16 Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Mon, 1 Jun 2020 17:46:06 +0100
Subject: [PATCH 30/41] Add missing semi colons

---
 .../blocks/personalization/components/variant-panel.js      | 4 ++--
 .../blocks/personalization/components/variant-toolbar.js    | 6 +++---
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/inc/features/blocks/personalization/components/variant-panel.js b/inc/features/blocks/personalization/components/variant-panel.js
index f1cc782..fa8a9c2 100644
--- a/inc/features/blocks/personalization/components/variant-panel.js
+++ b/inc/features/blocks/personalization/components/variant-panel.js
@@ -30,13 +30,13 @@ const VariantPanel = ( {
 				onSelect={ audience => updateBlockAttributes( variant.clientId, { audience: audience.id } ) }
 				onClearSelection={ () => updateBlockAttributes( variant.clientId, { audience: null } ) }
 			/>
-			{ ! variant.attributes.audience && (
+			{ !variant.attributes.audience && (
 				<p className="description">
 					{ __( 'You must select an audience for this variant.', 'altis-experiments' ) }
 				</p>
 			) }
 		</PanelBody>
 	);
-}
+};
 
 export default VariantPanel;
diff --git a/inc/features/blocks/personalization/components/variant-toolbar.js b/inc/features/blocks/personalization/components/variant-toolbar.js
index f2ab79f..f20862f 100644
--- a/inc/features/blocks/personalization/components/variant-toolbar.js
+++ b/inc/features/blocks/personalization/components/variant-toolbar.js
@@ -20,16 +20,16 @@ const VariantToolbar = props => {
 			>
 				{ __( 'Copy', 'altis-experiments' ) }
 			</IconButton>
-			{ ! isFallback && (
+			{ !isFallback && (
 				<IconButton
 					icon='trash'
 					title={ __( 'Remove variant', 'altis-experiments' ) }
-					disabled={ ! canRemove }
+					disabled={ !canRemove }
 					onClick={ onRemove }
 				/>
 			) }
 		</div>
-	)
+	);
 };
 
 export default VariantToolbar;

From 50b5d2f034f6ac6fcd6b070c4ab3106bd3411304 Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Mon, 1 Jun 2020 17:46:31 +0100
Subject: [PATCH 31/41] Fix operator spacing

---
 .../blocks/personalization/components/variant-toolbar.js        | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/inc/features/blocks/personalization/components/variant-toolbar.js b/inc/features/blocks/personalization/components/variant-toolbar.js
index f20862f..4839775 100644
--- a/inc/features/blocks/personalization/components/variant-toolbar.js
+++ b/inc/features/blocks/personalization/components/variant-toolbar.js
@@ -20,7 +20,7 @@ const VariantToolbar = props => {
 			>
 				{ __( 'Copy', 'altis-experiments' ) }
 			</IconButton>
-			{ !isFallback && (
+			{ ! isFallback && (
 				<IconButton
 					icon='trash'
 					title={ __( 'Remove variant', 'altis-experiments' ) }

From ea1816146f2c12d5d42924dbf64d4fcbf69aa423 Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Mon, 1 Jun 2020 17:57:09 +0100
Subject: [PATCH 32/41] Check for error on audience object in VariantTitle

---
 .../blocks/personalization/components/variant-title.js        | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/inc/features/blocks/personalization/components/variant-title.js b/inc/features/blocks/personalization/components/variant-title.js
index 75119dc..de04517 100644
--- a/inc/features/blocks/personalization/components/variant-title.js
+++ b/inc/features/blocks/personalization/components/variant-title.js
@@ -22,6 +22,10 @@ const VariantTitle = ( { variant } ) => {
 		return audience.title.rendered;
 	}
 
+	if ( audience && audience.error && audience.error.message ) {
+		return audience.error.message;
+	}
+
 	if ( isLoading ) {
 		return __( 'Loading...', 'altis-experiments' );
 	}

From 4d038a3d395568a84516991b333954cd8211986a Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Mon, 1 Jun 2020 17:57:31 +0100
Subject: [PATCH 33/41] Use plugin file constant for `plugins_url()` calls

---
 inc/features/blocks/personalization-variant/register.php | 3 ++-
 inc/features/blocks/personalization/register.php         | 4 ++--
 inc/utils/namespace.php                                  | 2 +-
 plugin.php                                               | 1 +
 4 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/inc/features/blocks/personalization-variant/register.php b/inc/features/blocks/personalization-variant/register.php
index d501a3d..2448efd 100644
--- a/inc/features/blocks/personalization-variant/register.php
+++ b/inc/features/blocks/personalization-variant/register.php
@@ -10,6 +10,7 @@
 
 namespace Altis\Experiments\Features\Blocks\Personalization_Variant;
 
+use Altis\Experiments;
 use Altis\Experiments\Features\Blocks;
 use Altis\Experiments\Utils;
 
@@ -49,7 +50,7 @@ function enqueue_assets() {
 			'window.Altis.Analytics = window.Altis.Analytics || {};' .
 			'window.Altis.Analytics.Experiments = window.Altis.Analytics.Experiments || {};' .
 			'window.Altis.Analytics.Experiments.BuildURL = %s;',
-			wp_json_encode( plugins_url( 'build', dirname( __FILE__, 4 ) ) )
+			wp_json_encode( plugins_url( 'build', Experiments\ROOT_FILE ) )
 		),
 		'before'
 	);
diff --git a/inc/features/blocks/personalization/register.php b/inc/features/blocks/personalization/register.php
index 0afc97b..4438326 100644
--- a/inc/features/blocks/personalization/register.php
+++ b/inc/features/blocks/personalization/register.php
@@ -61,7 +61,7 @@ function enqueue_assets() {
 			'window.Altis.Analytics = window.Altis.Analytics || {};' .
 			'window.Altis.Analytics.Experiments = window.Altis.Analytics.Experiments || {};' .
 			'window.Altis.Analytics.Experiments.BuildURL = %s;',
-			wp_json_encode( plugins_url( 'build', dirname( __FILE__, 4 ) ) )
+			wp_json_encode( plugins_url( 'build', Experiments\ROOT_FILE ) )
 		),
 		'before'
 	);
@@ -69,7 +69,7 @@ function enqueue_assets() {
 	// Queue up editor CSS.
 	wp_enqueue_style(
 		'altis-experiments-features-blocks-personalization',
-		plugins_url( 'inc/features/blocks/personalization/edit.css', Experiments\ROOT_DIR . '/plugin.php' ),
+		plugins_url( 'inc/features/blocks/personalization/edit.css', Experiments\ROOT_FILE ),
 		[],
 		'2020-05-22-01'
 	);
diff --git a/inc/utils/namespace.php b/inc/utils/namespace.php
index 7f79a31..f5e7f7a 100644
--- a/inc/utils/namespace.php
+++ b/inc/utils/namespace.php
@@ -36,5 +36,5 @@ function get_asset_url( string $filename ) {
 		return $path;
 	}
 
-	return plugins_url( $manifest[ $filename ], Experiments\ROOT_DIR . '/build/assets' );
+	return plugins_url( $manifest[ $filename ], $manifest_file );
 }
diff --git a/plugin.php b/plugin.php
index 40e5d73..9aedac8 100644
--- a/plugin.php
+++ b/plugin.php
@@ -10,6 +10,7 @@
 namespace Altis\Experiments;
 
 const ROOT_DIR = __DIR__;
+const ROOT_FILE = __FILE__;
 
 // Check if this is installed as a self contained built version.
 if ( file_exists( ROOT_DIR . '/vendor/autoload.php' ) ) {

From d421491865e589f82ce81f460f6aae74138d0322 Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Mon, 1 Jun 2020 18:44:15 +0100
Subject: [PATCH 34/41] Check audience status for `trash` as well API error

---
 .../personalization/components/variant-title.js      | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/inc/features/blocks/personalization/components/variant-title.js b/inc/features/blocks/personalization/components/variant-title.js
index de04517..45900fb 100644
--- a/inc/features/blocks/personalization/components/variant-title.js
+++ b/inc/features/blocks/personalization/components/variant-title.js
@@ -18,10 +18,20 @@ const VariantTitle = ( { variant } ) => {
 		return __( 'Select audience', 'altis-experiments' );
 	}
 
-	if ( audience && audience.title && audience.title.rendered ) {
+	const status = ( audience && audience.status ) || 'draft';
+	const title = audience && audience.title && audience.title.rendered;
+
+	// Audience is valid and has a title.
+	if ( status !== 'trash' && title ) {
 		return audience.title.rendered;
 	}
 
+	// Audience has been deleted.
+	if ( status === 'trash' ) {
+		return __( '(deleted)', 'altis-experiments' );
+	}
+
+	// Check if audience reponse is a REST API error.
 	if ( audience && audience.error && audience.error.message ) {
 		return audience.error.message;
 	}

From 73b10f5e5b30a4b5b741298ee87743ee35cb946a Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Wed, 3 Jun 2020 12:24:25 +0100
Subject: [PATCH 35/41] Rename callback to be prefixed with `on*`

---
 .../blocks/personalization-variant/edit.js    |  8 +++--
 .../components/variant-panel.js               |  6 ++--
 .../components/variant-title.js               |  1 +
 .../components/variant-toolbar.js             |  2 +-
 .../blocks/personalization/data/edit.js       | 23 +++++++++++---
 inc/features/blocks/personalization/edit.js   | 31 ++++++-------------
 6 files changed, 37 insertions(+), 34 deletions(-)

diff --git a/inc/features/blocks/personalization-variant/edit.js b/inc/features/blocks/personalization-variant/edit.js
index eb8fedc..e309575 100644
--- a/inc/features/blocks/personalization-variant/edit.js
+++ b/inc/features/blocks/personalization-variant/edit.js
@@ -7,12 +7,12 @@ const { withSelect, withDispatch } = wp.data;
 const Edit = ( {
 	hasChildBlocks,
 	isSelected,
-	selectParent,
+	onSelect,
 } ) => {
 	// Select the block parent if a variant is directly selected.
 	useEffect( () => {
 		if ( isSelected ) {
-			selectParent();
+			onSelect();
 		}
 	}, [ isSelected ] );
 
@@ -43,7 +43,9 @@ export default compose(
 		const rootClientId = getBlockRootClientId( clientId );
 
 		return {
-			selectParent: () => selectBlock( rootClientId ),
+			onSelect: () => {
+				selectBlock( rootClientId );
+			},
 		};
 	} ),
 )( Edit );
diff --git a/inc/features/blocks/personalization/components/variant-panel.js b/inc/features/blocks/personalization/components/variant-panel.js
index fa8a9c2..f1b97c1 100644
--- a/inc/features/blocks/personalization/components/variant-panel.js
+++ b/inc/features/blocks/personalization/components/variant-panel.js
@@ -7,9 +7,7 @@ const { PanelBody } = wp.components;
 const { useDispatch } = wp.data;
 const { __ } = wp.i18n;
 
-const VariantPanel = ( {
-	variant,
-} ) => {
+const VariantPanel = ( { variant } ) => {
 	const { updateBlockAttributes } = useDispatch( 'core/block-editor' );
 
 	if ( variant.attributes.fallback ) {
@@ -30,7 +28,7 @@ const VariantPanel = ( {
 				onSelect={ audience => updateBlockAttributes( variant.clientId, { audience: audience.id } ) }
 				onClearSelection={ () => updateBlockAttributes( variant.clientId, { audience: null } ) }
 			/>
-			{ !variant.attributes.audience && (
+			{ ! variant.attributes.audience && (
 				<p className="description">
 					{ __( 'You must select an audience for this variant.', 'altis-experiments' ) }
 				</p>
diff --git a/inc/features/blocks/personalization/components/variant-title.js b/inc/features/blocks/personalization/components/variant-title.js
index 45900fb..7661b39 100644
--- a/inc/features/blocks/personalization/components/variant-title.js
+++ b/inc/features/blocks/personalization/components/variant-title.js
@@ -6,6 +6,7 @@ const VariantTitle = ( { variant } ) => {
 	const audience = useSelect( select => {
 		return select( 'audience' ).getPost( variant.attributes.audience );
 	}, [ variant.attributes.audience ] );
+
 	const isLoading = useSelect( select => {
 		return select( 'audience' ).getIsLoading();
 	}, [] );
diff --git a/inc/features/blocks/personalization/components/variant-toolbar.js b/inc/features/blocks/personalization/components/variant-toolbar.js
index 4839775..69b5a07 100644
--- a/inc/features/blocks/personalization/components/variant-toolbar.js
+++ b/inc/features/blocks/personalization/components/variant-toolbar.js
@@ -24,7 +24,7 @@ const VariantToolbar = props => {
 				<IconButton
 					icon='trash'
 					title={ __( 'Remove variant', 'altis-experiments' ) }
-					disabled={ !canRemove }
+					disabled={ ! canRemove }
 					onClick={ onRemove }
 				/>
 			) }
diff --git a/inc/features/blocks/personalization/data/edit.js b/inc/features/blocks/personalization/data/edit.js
index 1e4ef52..9d949dd 100644
--- a/inc/features/blocks/personalization/data/edit.js
+++ b/inc/features/blocks/personalization/data/edit.js
@@ -50,7 +50,7 @@ const withData = Component => compose(
 	} ),
 	withDispatch( ( dispatch, ownProps, registry ) => {
 		return {
-			addVariant() {
+			onAddVariant() {
 				const { clientId, attributes } = ownProps;
 				const { replaceInnerBlocks } = dispatch( 'core/block-editor' );
 				const { getBlocks } = registry.select( 'core/block-editor' );
@@ -72,7 +72,7 @@ const withData = Component => compose(
 				// Return new client ID to enable selection.
 				return newVariant.clientId;
 			},
-			copyVariant( variantClientId ) {
+			onCopyVariant( variantClientId ) {
 				const { replaceInnerBlocks } = dispatch( 'core/block-editor' );
 				const {
 					getBlock,
@@ -105,7 +105,7 @@ const withData = Component => compose(
 
 				return newVariant.clientId;
 			},
-			removeVariant( variantClientId ) {
+			onRemoveVariant( variantClientId ) {
 				const { clientId, attributes } = ownProps;
 				const { replaceInnerBlocks } = dispatch( 'core/block-editor' );
 				const { getBlocks } = registry.select( 'core/block-editor' );
@@ -121,9 +121,22 @@ const withData = Component => compose(
 				// Update the inner blocks.
 				replaceInnerBlocks( clientId, innerBlocks );
 			},
-			setVariantAttributes( variantClientId, attributes ) {
+			onSetClientId() {
+				const { attributes, setAttributes } = ownProps;
+				if ( ! attributes.clientId ) {
+					setAttributes( { clientId: attributes.clientId } );
+				}
+			},
+			onSetVariantParents() {
+				const { attributes, variants } = ownProps;
 				const { updateBlockAttributes } = dispatch( 'core/block-editor' );
-				updateBlockAttributes( variantClientId, attributes );
+				variants.forEach( variant => {
+					if ( ! variant.attributes.parentId || variant.attributes.parentId !== attributes.clientId ) {
+						updateBlockAttributes( variant.clientId, {
+							parentId: attributes.clientId,
+						} );
+					}
+				} );
 			},
 		};
 	} ),
diff --git a/inc/features/blocks/personalization/edit.js b/inc/features/blocks/personalization/edit.js
index e194640..d27fb49 100644
--- a/inc/features/blocks/personalization/edit.js
+++ b/inc/features/blocks/personalization/edit.js
@@ -31,15 +31,15 @@ const TEMPLATE = [
 
 // Audience picker input.
 const Edit = ( {
-	addVariant,
 	attributes,
 	className,
 	clientId,
-	copyVariant,
 	isSelected,
-	removeVariant,
-	setAttributes,
-	setVariantAttributes,
+	onAddVariant,
+	onCopyVariant,
+	onRemoveVariant,
+	onSetClientId,
+	onSetVariantParents,
 	variants,
 } ) => {
 	// Track currently selected variant.
@@ -51,20 +51,12 @@ const Edit = ( {
 
 	// Set clientId attribute if not set.
 	useEffect( () => {
-		if ( ! attributes.clientId ) {
-			setAttributes( { clientId } );
-		}
+		onSetClientId();
 	}, [] );
 
 	// Ensure variant parentId is correct.
 	useEffect( () => {
-		variants.forEach( variant => {
-			if ( ! variant.attributes.parentId || variant.attributes.parentId !== attributes.clientId ) {
-				setVariantAttributes( variant.clientId, {
-					parentId: attributes.clientId,
-				} );
-			}
-		} );
+		onSetVariantParents();
 	}, [ attributes.clientId ] );
 
 	// Controls that appear before the variant selector buttons.
@@ -73,10 +65,7 @@ const Edit = ( {
 			icon: 'plus',
 			title: __( 'Add a variant', 'altis-experiments' ),
 			className: 'altis-add-variant-button',
-			onClick: () => {
-				const newClientId = addVariant();
-				setVariant( newClientId );
-			},
+			onClick: () => setVariant( onAddVariant() ),
 		},
 	];
 
@@ -87,7 +76,7 @@ const Edit = ( {
 		} else {
 			setVariant( variants[ activeVariantIndex - 1 ].clientId );
 		}
-		removeVariant( activeVariant );
+		onRemoveVariant( activeVariant );
 	};
 
 	return (
@@ -138,7 +127,7 @@ const Edit = ( {
 						<VariantToolbar
 							canRemove={ variants.length > 1 }
 							isFallback={ activeVariant && variants[ activeVariantIndex ].attributes.fallback }
-							onCopy={ () => setVariant( copyVariant( activeVariant ) ) }
+							onCopy={ () => setVariant( onCopyVariant( activeVariant ) ) }
 							onRemove={ onRemove }
 						/>
 					) }

From bc7e45e91d2d83b6a4ced2469a1a045e0dd64e0a Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Wed, 3 Jun 2020 16:26:42 +0100
Subject: [PATCH 36/41] Fix styling for WP 5.4

---
 inc/features/blocks/personalization/edit.css | 20 ++++++++++++------
 inc/features/blocks/personalization/edit.js  | 22 +++++++++++---------
 2 files changed, 26 insertions(+), 16 deletions(-)

diff --git a/inc/features/blocks/personalization/edit.css b/inc/features/blocks/personalization/edit.css
index fb4459a..be54774 100644
--- a/inc/features/blocks/personalization/edit.css
+++ b/inc/features/blocks/personalization/edit.css
@@ -28,26 +28,29 @@
 	flex: 0;
 	border: 0;
 	padding: 0;
-	margin: 0;
+	margin: -4px 0;
 	display: flex;
 }
 
-.altis-experience-block-header__toolbar .components-icon-button {
-	padding: 3px 5px;
+.altis-experience-block-header__toolbar .components-button {
 	margin-left: 3px;
+	color: inherit;
 }
 
 .altis-variants-toolbar {
+	flex-shrink: 1;
+}
+
+.altis-variants-toolbar .altis-variants-toolbar__tabs {
 	max-width: 460px;
 	overflow-x: auto;
+	margin-left: 0;
 }
 
 .altis-variants-toolbar .altis-variant-button {
 	width: auto;
-	margin: 3px 3px 3px 0;
-	height: 30px;
-	line-height: 13px;
 	flex-shrink: 0;
+	padding: 0 11px;
 }
 
 .altis-variants-toolbar .altis-variant-button.is-active,
@@ -56,11 +59,16 @@
 .altis-variants-toolbar .altis-variant-button.is-pressed:hover,
 .altis-variants-toolbar .altis-variant-button.is-active:focus,
 .altis-variants-toolbar .altis-variant-button.is-pressed:focus,
+.altis-variants-toolbar .altis-variant-button:not(:disabled):not([aria-disabled="true"]):not(.is-secondary):not(.is-primary):not(.is-tertiary):not(.is-link).is-active,
+.altis-variants-toolbar .altis-variant-button:not(:disabled):not([aria-disabled="true"]):not(.is-secondary):not(.is-primary):not(.is-tertiary):not(.is-link).is-pressed,
 .altis-variants-toolbar .altis-variant-button:not(:disabled):not([aria-disabled="true"]):not(.is-default).is-active,
 .altis-variants-toolbar .altis-variant-button:not(:disabled):not([aria-disabled="true"]):not(.is-default).is-pressed {
 	outline: none;
 	color: #fff;
 	box-shadow: none;
+	margin: 3px;
+	height: 30px;
+	padding: 0 8px;
 	background: #555d66;
 }
 
diff --git a/inc/features/blocks/personalization/edit.js b/inc/features/blocks/personalization/edit.js
index d27fb49..e9a4b79 100644
--- a/inc/features/blocks/personalization/edit.js
+++ b/inc/features/blocks/personalization/edit.js
@@ -86,16 +86,18 @@ const Edit = ( {
 					className="altis-variants-toolbar"
 					controls={ variantsToolbarControls }
 				>
-					{ variants.map( variant => (
-						<Button
-							key={ `variant-select-${ variant.clientId }` }
-							className={ `altis-variant-button components-icon-button has-text ${ activeVariant === variant.clientId && 'is-active' }` }
-							title={ __( 'Select variant', 'altis-experiments' ) }
-							onClick={ () => setVariant( variant.clientId ) }
-						>
-							<VariantTitle variant={ variant } />
-						</Button>
-					) ) }
+					<div className="altis-variants-toolbar__tabs">
+						{ variants.map( variant => (
+							<Button
+								key={ `variant-select-${ variant.clientId }` }
+								className={ `altis-variant-button components-icon-button has-text ${ activeVariant === variant.clientId && 'is-active' }` }
+								title={ __( 'Select variant', 'altis-experiments' ) }
+								onClick={ () => setVariant( variant.clientId ) }
+							>
+								<VariantTitle variant={ variant } />
+							</Button>
+						) ) }
+					</div>
 				</Toolbar>
 			</BlockControls>
 			<InspectorControls>

From f064ad815c84068735061386ec249eb3e0584953 Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Wed, 3 Jun 2020 16:47:47 +0100
Subject: [PATCH 37/41] Fix flexbox toolbar issues

---
 inc/features/blocks/personalization/data/edit.js | 5 ++++-
 inc/features/blocks/personalization/edit.css     | 6 +++++-
 inc/features/blocks/personalization/register.php | 2 +-
 3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/inc/features/blocks/personalization/data/edit.js b/inc/features/blocks/personalization/data/edit.js
index 9d949dd..ea0d82b 100644
--- a/inc/features/blocks/personalization/data/edit.js
+++ b/inc/features/blocks/personalization/data/edit.js
@@ -52,7 +52,7 @@ const withData = Component => compose(
 		return {
 			onAddVariant() {
 				const { clientId, attributes } = ownProps;
-				const { replaceInnerBlocks } = dispatch( 'core/block-editor' );
+				const { replaceInnerBlocks, selectBlock } = dispatch( 'core/block-editor' );
 				const { getBlocks } = registry.select( 'core/block-editor' );
 
 				const newVariant = createBlock( 'altis/personalization-variant', {
@@ -69,6 +69,9 @@ const withData = Component => compose(
 				// Update the inner blocks.
 				replaceInnerBlocks( clientId, innerBlocks );
 
+				// Focus defaults to the newly added inner block so keep it on the parent.
+				selectBlock( clientId );
+
 				// Return new client ID to enable selection.
 				return newVariant.clientId;
 			},
diff --git a/inc/features/blocks/personalization/edit.css b/inc/features/blocks/personalization/edit.css
index be54774..af74827 100644
--- a/inc/features/blocks/personalization/edit.css
+++ b/inc/features/blocks/personalization/edit.css
@@ -37,12 +37,16 @@
 	color: inherit;
 }
 
+.block-editor-block-contextual-toolbar[data-type="altis/personalization"] .block-editor-block-toolbar__slot {
+	flex-shrink: 0;
+}
+
 .altis-variants-toolbar {
 	flex-shrink: 1;
 }
 
 .altis-variants-toolbar .altis-variants-toolbar__tabs {
-	max-width: 460px;
+	max-width: 400px;
 	overflow-x: auto;
 	margin-left: 0;
 }
diff --git a/inc/features/blocks/personalization/register.php b/inc/features/blocks/personalization/register.php
index 4438326..7e0af60 100644
--- a/inc/features/blocks/personalization/register.php
+++ b/inc/features/blocks/personalization/register.php
@@ -71,7 +71,7 @@ function enqueue_assets() {
 		'altis-experiments-features-blocks-personalization',
 		plugins_url( 'inc/features/blocks/personalization/edit.css', Experiments\ROOT_FILE ),
 		[],
-		'2020-05-22-01'
+		'2020-06-03-01'
 	);
 }
 

From d1514b045830ea53fa7c6fa0b7faf305720169b4 Mon Sep 17 00:00:00 2001
From: Ryan McCue <me@ryanmccue.info>
Date: Fri, 5 Jun 2020 01:47:37 +1000
Subject: [PATCH 38/41] Fix minor coding standards pieces

---
 inc/features/blocks/personalization-variant/edit.js         | 6 +++++-
 .../blocks/personalization/components/variant-toolbar.js    | 6 +++---
 plugin.php                                                  | 4 ++--
 3 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/inc/features/blocks/personalization-variant/edit.js b/inc/features/blocks/personalization-variant/edit.js
index e309575..4162280 100644
--- a/inc/features/blocks/personalization-variant/edit.js
+++ b/inc/features/blocks/personalization-variant/edit.js
@@ -22,7 +22,11 @@ const Edit = ( {
 		props.renderAppender = () => <InnerBlocks.ButtonBlockAppender />;
 	}
 
-	return <InnerBlocks { ...props } />;
+	return (
+		<InnerBlocks
+			{ ...props }
+		/>
+	);
 };
 
 export default compose(
diff --git a/inc/features/blocks/personalization/components/variant-toolbar.js b/inc/features/blocks/personalization/components/variant-toolbar.js
index 69b5a07..57180a7 100644
--- a/inc/features/blocks/personalization/components/variant-toolbar.js
+++ b/inc/features/blocks/personalization/components/variant-toolbar.js
@@ -14,7 +14,7 @@ const VariantToolbar = props => {
 	return (
 		<div className="altis-experience-block-header__toolbar">
 			<IconButton
-				icon='migrate'
+				icon="migrate"
 				title={ __( 'Copy variant', 'altis-experiments' ) }
 				onClick={ onCopy }
 			>
@@ -22,9 +22,9 @@ const VariantToolbar = props => {
 			</IconButton>
 			{ ! isFallback && (
 				<IconButton
-					icon='trash'
-					title={ __( 'Remove variant', 'altis-experiments' ) }
 					disabled={ ! canRemove }
+					icon="trash"
+					title={ __( 'Remove variant', 'altis-experiments' ) }
 					onClick={ onRemove }
 				/>
 			) }
diff --git a/plugin.php b/plugin.php
index 9aedac8..00eaaf7 100644
--- a/plugin.php
+++ b/plugin.php
@@ -17,7 +17,7 @@
 	require_once ROOT_DIR . '/vendor/autoload.php';
 }
 
-require_once 'inc/namespace.php';
-require_once 'inc/utils/namespace.php';
+require_once ROOT_DIR . '/inc/namespace.php';
+require_once ROOT_DIR . '/inc/utils/namespace.php';
 
 add_action( 'plugins_loaded', __NAMESPACE__ . '\\setup', 11 );

From ac81eca5356cecf529be7b1c91364964c1461989 Mon Sep 17 00:00:00 2001
From: Ryan McCue <me@ryanmccue.info>
Date: Fri, 5 Jun 2020 01:57:36 +1000
Subject: [PATCH 39/41] Simplify some tidbits

---
 inc/features/blocks/personalization-variant/edit.js           | 4 +---
 .../blocks/personalization/components/variant-title.js        | 4 +---
 2 files changed, 2 insertions(+), 6 deletions(-)

diff --git a/inc/features/blocks/personalization-variant/edit.js b/inc/features/blocks/personalization-variant/edit.js
index 4162280..afd44fa 100644
--- a/inc/features/blocks/personalization-variant/edit.js
+++ b/inc/features/blocks/personalization-variant/edit.js
@@ -47,9 +47,7 @@ export default compose(
 		const rootClientId = getBlockRootClientId( clientId );
 
 		return {
-			onSelect: () => {
-				selectBlock( rootClientId );
-			},
+			onSelect: () => selectBlock( rootClientId ),
 		};
 	} ),
 )( Edit );
diff --git a/inc/features/blocks/personalization/components/variant-title.js b/inc/features/blocks/personalization/components/variant-title.js
index 7661b39..2be2af3 100644
--- a/inc/features/blocks/personalization/components/variant-title.js
+++ b/inc/features/blocks/personalization/components/variant-title.js
@@ -7,9 +7,7 @@ const VariantTitle = ( { variant } ) => {
 		return select( 'audience' ).getPost( variant.attributes.audience );
 	}, [ variant.attributes.audience ] );
 
-	const isLoading = useSelect( select => {
-		return select( 'audience' ).getIsLoading();
-	}, [] );
+	const isLoading = useSelect( select => select( 'audience' ).getIsLoading(), [] );
 
 	if ( variant.attributes.fallback ) {
 		return __( 'Fallback', 'altis-experiments' );

From ddc9dd0218c6c94eb9c911b84fa16a737b3ee89f Mon Sep 17 00:00:00 2001
From: Ryan McCue <me@ryanmccue.info>
Date: Fri, 5 Jun 2020 01:58:12 +1000
Subject: [PATCH 40/41] Correct a misspellling

---
 inc/utils/namespace.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/inc/utils/namespace.php b/inc/utils/namespace.php
index f5e7f7a..430b522 100644
--- a/inc/utils/namespace.php
+++ b/inc/utils/namespace.php
@@ -12,7 +12,7 @@
 /**
  * Return asset file name based on generated manifest.json file.
  *
- * @param string $filename The entrpoint filename used in webpack.config.js.
+ * @param string $filename The entrypoint filename used in webpack.config.js.
  * @return string|false The URL of the generated asset file.
  */
 function get_asset_url( string $filename ) {

From e59f4fc6773dc18a22d65caea3532b6d20de0a8d Mon Sep 17 00:00:00 2001
From: Robert O'Rourke <robert@o-rourke.org>
Date: Fri, 5 Jun 2020 17:04:13 +0100
Subject: [PATCH 41/41] Use ROOT_FILE for title ab test asset URL

---
 inc/features/titles/namespace.php | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/inc/features/titles/namespace.php b/inc/features/titles/namespace.php
index 04ebf46..3ac42ae 100644
--- a/inc/features/titles/namespace.php
+++ b/inc/features/titles/namespace.php
@@ -7,9 +7,8 @@
 
 namespace Altis\Experiments\Features\Titles;
 
-use function Altis\Experiments\output_ab_test_html_for_post;
-use function Altis\Experiments\register_post_ab_test;
-use function Altis\Experiments\Utils\get_asset_url;
+use Altis\Experiments;
+use Altis\Experiments\Utils;
 
 /**
  * Bootstrap Title AB Tests Feature.
@@ -25,7 +24,7 @@ function setup() {
 /**
  * Load Block Editor sidebar plugin.
  *
- * @param string $hook
+ * @param string $hook Page hook suffix.
  */
 function admin_scripts( string $hook ) {
 	if ( ! in_array( $hook, [ 'post.php', 'post-new.php' ], true ) ) {
@@ -41,7 +40,7 @@ function admin_scripts( string $hook ) {
 
 	wp_enqueue_script(
 		'altis-experiments-features-titles',
-		get_asset_url( 'features/titles.js' ),
+		Utils\get_asset_url( 'features/titles.js' ),
 		[
 			'wp-plugins',
 			'wp-blocks',
@@ -62,7 +61,7 @@ function admin_scripts( string $hook ) {
 			'window.Altis.Analytics = window.Altis.Analytics || {};' .
 			'window.Altis.Analytics.Experiments = window.Altis.Analytics.Experiments || {};' .
 			'window.Altis.Analytics.Experiments.BuildURL = %s;',
-			wp_json_encode( plugins_url( 'build', dirname( __FILE__, 3 ) ) )
+			wp_json_encode( plugins_url( 'build', Experiments\ROOT_FILE ) )
 		),
 		'before'
 	);
@@ -97,7 +96,7 @@ function register_default_post_type_support() {
  * @return string
  */
 function add_title_ab_test_to_title( string $title, int $post_id ) : string {
-	return output_ab_test_html_for_post( 'titles', $post_id, $title );
+	return Experiments\output_ab_test_html_for_post( 'titles', $post_id, $title );
 }
 
 /**
@@ -108,7 +107,7 @@ function init() {
 		add_filter( 'the_title', __NAMESPACE__ . '\\add_title_ab_test_to_title', 10, 2 );
 	}
 
-	register_post_ab_test(
+	Experiments\register_post_ab_test(
 		'titles',
 		[
 			'label' => __( 'Titles', 'altis-experiments' ),