From 47ac2a6774d428b1a022fb0320270c222e5ecda9 Mon Sep 17 00:00:00 2001
From: Adam Berger <adam@simplystated.dev>
Date: Thu, 29 Sep 2022 21:56:19 +0000
Subject: [PATCH] Allow any string value in meta

---
 .changeset/tasty-guests-cry.md                    |  5 +++++
 packages/machine-extractor/examples/meta.ts       |  8 ++++++++
 packages/machine-extractor/src/meta.ts            |  8 +++-----
 packages/machine-extractor/src/toMachineConfig.ts | 12 ++++++++----
 4 files changed, 24 insertions(+), 9 deletions(-)
 create mode 100644 .changeset/tasty-guests-cry.md
 create mode 100644 packages/machine-extractor/examples/meta.ts

diff --git a/.changeset/tasty-guests-cry.md b/.changeset/tasty-guests-cry.md
new file mode 100644
index 00000000..d7388a3b
--- /dev/null
+++ b/.changeset/tasty-guests-cry.md
@@ -0,0 +1,5 @@
+---
+'@xstate/machine-extractor': minor
+---
+
+Capture any string field from meta instead of just description
diff --git a/packages/machine-extractor/examples/meta.ts b/packages/machine-extractor/examples/meta.ts
new file mode 100644
index 00000000..81bb72c8
--- /dev/null
+++ b/packages/machine-extractor/examples/meta.ts
@@ -0,0 +1,8 @@
+import { createMachine } from 'xstate';
+
+export const machine = createMachine({
+  meta: {
+    description: 'description',
+    someOtherField: 'hello there',
+  },
+});
diff --git a/packages/machine-extractor/src/meta.ts b/packages/machine-extractor/src/meta.ts
index 9ae92895..b247d9ae 100644
--- a/packages/machine-extractor/src/meta.ts
+++ b/packages/machine-extractor/src/meta.ts
@@ -1,9 +1,7 @@
 import { StringLiteral, TemplateLiteral } from './scalars';
 import { unionType } from './unionType';
-import { objectTypeWithKnownKeys } from './utils';
+import { objectOf } from './utils';
 
-export const MetaDescription = unionType([StringLiteral, TemplateLiteral]);
+export const MetaValues = unionType([StringLiteral, TemplateLiteral]);
 
-export const StateMeta = objectTypeWithKnownKeys({
-  description: MetaDescription,
-});
+export const StateMeta = objectOf(MetaValues);
diff --git a/packages/machine-extractor/src/toMachineConfig.ts b/packages/machine-extractor/src/toMachineConfig.ts
index 345d7fb6..4567e986 100644
--- a/packages/machine-extractor/src/toMachineConfig.ts
+++ b/packages/machine-extractor/src/toMachineConfig.ts
@@ -101,10 +101,14 @@ const parseStateNode = (
     config.always = getTransitions(astResult.always, opts);
   }
 
-  if (astResult.meta?.description) {
-    config.meta = {
-      description: astResult.meta.description.value,
-    };
+  if (astResult.meta) {
+    config.meta = astResult.meta.properties.reduce(
+      (meta, props) => ({
+        ...meta,
+        [props.key]: props.result.value,
+      }),
+      {},
+    );
   }
 
   if (astResult.onDone) {