Add setting option to delete original image file

- Add helper to check option value
- Register setting to delete original image file
- Update original_image metadata before deleting
- Remove option on plugin uninstall

plugins/webp-uploads/helper.php

@@ -410,6 +410,17 @@ function webp_uploads_is_fallback_enabled(): bool {
 	return (bool) get_option( 'perflab_generate_webp_and_jpeg' );
 }
 
+/**
+ * Checks if the `webp_uploads_delete_original` option is enabled.
+ *
+ * @since 2.2.0
+ *
+ * @return bool True if the option is enabled, false otherwise.
+ */
+function webp_uploads_is_delete_original_enabled(): bool {
+	return (bool) get_option( 'webp_uploads_delete_original' );
+}
+
 /**
  * Retrieves the image URL for a specified MIME type from the attachment metadata.
  *

plugins/webp-uploads/hooks.php

@@ -13,13 +13,13 @@
 
 /**
  * Hook called by `wp_generate_attachment_metadata` to create the `sources` property for every image
- * size, the sources' property would create a new image size with all the mime types specified in
- * `webp_uploads_get_upload_image_mime_transforms`. If the original image is one of the mimes from
- * `webp_uploads_get_upload_image_mime_transforms` the image is just added to the `sources` property and not
- * created again. If the uploaded attachment is not a supported mime by this function, the hook does not alter the
- * metadata of the attachment. In addition to every single size the `sources` property is added at the
- * top level of the image metadata to store the references for all the mime types for the `full` size image of the
- * attachment.
+ * size, and delete the original JPEG/PNG file if the option is enabled. The sources' property would
+ * create a new image size with all the mime types specified in `webp_uploads_get_upload_image_mime_transforms`.
+ * If the original image is one of the mimes from `webp_uploads_get_upload_image_mime_transforms` the image is just
+ * added to the `sources` property and not created again. If the uploaded attachment is not a supported mime by this
+ * function, the hook does not alter the metadata of the attachment. In addition to every single size the `sources`
+ * property is added at the top level of the image metadata to store the references for all the mime types for the
+ * `full` size image of the attachment.
  *
  * @since 1.0.0
  *
@@ -234,6 +234,35 @@ function webp_uploads_create_sources_property( array $metadata, int $attachment_
 		$metadata['sizes'][ $size_name ] = $properties;
 	}
 
+	// Delete the original file if the option is enabled and new formats exist.
+	if ( webp_uploads_is_delete_original_enabled() && ! empty( $metadata['sources'] ) ) {
+		$new_formats_exist = false;
+
+		// Check if the 'sources' property has a file with the expected extensions.
+		foreach ( $metadata['sources'] as $current_mime_type => $source ) {
+			if ( isset( $source['file'] ) ) {
+				$file_extension = pathinfo( $source['file'], PATHINFO_EXTENSION );
+				if ( in_array( $file_extension, array( 'avif', 'webp' ), true ) ) {
+					$new_formats_exist = true;
+					break;
+				}
+			}
+		}
+
+		if ( $new_formats_exist ) {
+			// Update the original_image metadata to point to the new primary image
+			// file since original image will be deleted.
+			$first_source = reset( $metadata['sources'] );
+			if ( ! empty( $first_source['file'] ) ) {
+				$metadata['original_image'] = $first_source['file'];
+				wp_update_attachment_metadata( $attachment_id, $metadata );
+			}
+
+			// Delete the original file.
+			wp_delete_file( $file );
+		}
+	}
+
 	return $metadata;
 }
 add_filter( 'wp_generate_attachment_metadata', 'webp_uploads_create_sources_property', 10, 2 );

plugins/webp-uploads/settings.php

@@ -51,6 +51,17 @@ function webp_uploads_register_media_settings_field(): void {
 			'show_in_rest' => false,
 		)
 	);
+
+	// Add a setting to delete the original image file after conversion.
+	register_setting(
+		'media',
+		'webp_uploads_delete_original',
+		array(
+			'type'         => 'boolean',
+			'default'      => false,
+			'show_in_rest' => false,
+		)
+	);
 }
 add_action( 'init', 'webp_uploads_register_media_settings_field' );
 
@@ -105,6 +116,16 @@ function webp_uploads_add_media_settings_fields(): void {
 		'perflab_modern_image_format_settings',
 		array( 'class' => 'webp-uploads-use-picture-element' )
 	);
+
+	// Add delete original image setting field.
+	add_settings_field(
+		'webp_uploads_delete_original',
+		__( 'Delete Original Image', 'webp-uploads' ),
+		'webp_uploads_delete_original_setting_callback',
+		'media',
+		'perflab_modern_image_format_settings',
+		array( 'class' => 'webp-uploads-delete-original' )
+	);
 }
 add_action( 'admin_init', 'webp_uploads_add_media_settings_fields' );
 
@@ -270,6 +291,23 @@ function webp_uploads_use_picture_element_callback(): void {
 	<?php
 }
 
+/**
+ * Renders the settings field for the 'webp_uploads_delete_original' setting.
+ *
+ * @since 2.2.0
+ */
+function webp_uploads_delete_original_setting_callback(): void {
+	?>
+	<label for="webp_uploads_delete_original">
+		<input name="webp_uploads_delete_original" type="checkbox" id="webp_uploads_delete_original" value="1" <?php checked( '1', get_option( 'webp_uploads_delete_original' ) ); ?> />
+		<?php esc_html_e( 'Delete the original JPEG/PNG file after conversion', 'webp-uploads' ); ?>
+	</label>
+	<p class="description" id="webp_uploads_delete_original_description">
+		<?php esc_html_e( 'If enabled, the original image file will be deleted after conversion to modern formats. This will reduce filesystem storage but may cause incompatibility in certain cases.', 'webp-uploads' ); ?>
+	</p>
+	<?php
+}
+
 /**
  * Adds a settings link to the plugin's action links.
  *

plugins/webp-uploads/uninstall.php

@@ -38,4 +38,5 @@
  */
 function webp_uploads_delete_plugin_option(): void {
 	delete_option( 'perflab_generate_webp_and_jpeg' );
+	delete_option( 'webp_uploads_delete_original' );
 }