Feature: Disable Review notes until minimum content threshold is reached

includes/Experiments/Review_Notes/Review_Notes.php

@@ -124,11 +124,22 @@ public function maybe_set_ai_author( $prepared_comment, \WP_REST_Request $reques
 	 */
 	public function enqueue_assets(): void {
 		Asset_Loader::enqueue_script( 'review_notes', 'experiments/review-notes' );
+
+		/**
+		 * Filters the minimum content length required to enable review notes.
+		 *
+		 * @since x.x.x
+		 *
+		 * @param int $min_content_length The minimum number of characters required. Default 100.
+		 */
+		$min_content_length = (int) apply_filters( 'wpai_review_notes_min_content_length', 100 );
+
 		Asset_Loader::localize_script(
 			'review_notes',
 			'ReviewNotesData',
 			array(
-				'enabled' => $this->is_enabled(),
+				'enabled'          => $this->is_enabled(),
+				'minContentLength' => $min_content_length,
 			)
 		);
 	}

src/experiments/review-notes/components/ReviewNotesPlugin.tsx

@@ -34,9 +34,20 @@ import { useReviewBlock, useReviewNotes } from '../hooks/useReviewNotes';
  * reviewable blocks.
  */
 export default function ReviewNotesPlugin() {
-	const { isReviewing, progress, total, lastRunCount, runReview } =
-		useReviewNotes();
-	const { isReviewing: isReviewingBlock, reviewBlock } = useReviewBlock();
+	const {
+		isReviewing,
+		progress,
+		total,
+		lastRunCount,
+		runReview,
+		isContentTooShort,
+		minContentLength,
+	} = useReviewNotes();
+	const {
+		isReviewing: isReviewingBlock,
+		reviewBlock,
+		isContentTooShort: isBlockReviewDisabled,
+	} = useReviewBlock();
 	const { openGeneralSidebar } = useDispatch( editPostStore );
 	const openNotesPanel = () =>
 		openGeneralSidebar?.( 'edit-post/collab-sidebar' );
@@ -54,10 +65,19 @@ export default function ReviewNotesPlugin() {
 	const buttonLabel = isReviewing
 		? reviewingLabel
 		: __( 'Generate Review Notes', 'ai' );
-	const buttonDescription = __(
-		'This will review the content of this post block-by-block, and create Notes attached to each block with suggestions.',
-		'ai'
-	);
+	const buttonDescription = isContentTooShort
+		? sprintf(
+				/* translators: %d: minimum number of characters required. */
+				__(
+					'Review Notes will be available when the post content has at least %d characters.',
+					'ai'
+				),
+				minContentLength
+		  )
+		: __(
+				'This will review the content of this post block-by-block, and create Notes attached to each block with suggestions.',
+				'ai'
+		  );
 
 	return (
 		<>
@@ -69,7 +89,7 @@ export default function ReviewNotesPlugin() {
 							icon={ commentContent }
 							onClick={ runReview }
 							isBusy={ isReviewing }
-							disabled={ isReviewing }
+							disabled={ isReviewing || isContentTooShort }
 							style={ {
 								justifyContent: 'center',
 								width: '100%',
@@ -136,7 +156,9 @@ export default function ReviewNotesPlugin() {
 							icon={
 								isReviewingBlock ? <Spinner /> : commentContent
 							}
-							disabled={ isReviewingBlock }
+							disabled={
+								isReviewingBlock || isBlockReviewDisabled
+							}
 							onClick={ () => {
 								if ( clientId ) {
 									reviewBlock( clientId );

src/experiments/review-notes/hooks/useReviewNotes.ts

@@ -5,14 +5,15 @@
 /**
  * WordPress dependencies
  */
-import { dispatch, select } from '@wordpress/data';
+import { dispatch, select, useSelect } from '@wordpress/data';
 import { store as blockEditorStore } from '@wordpress/block-editor';
 import { store as coreStore } from '@wordpress/core-data';
 import { store as editPostStore } from '@wordpress/edit-post';
 import { store as editorStore } from '@wordpress/editor';
 import { useState } from '@wordpress/element';
 import { __, _n, sprintf } from '@wordpress/i18n';
 import { store as noticesStore } from '@wordpress/notices';
+import { count } from '@wordpress/wordcount';
 
 /**
  * Internal dependencies
@@ -70,6 +71,32 @@ interface NoteRecord {
 	[ key: string ]: unknown;
 }
 
+/**
+ * Hook for determining whether Review Notes should be available for the
+ * current post content.
+ *
+ * @return Availability state for the Review Notes feature.
+ */
+function useReviewNotesAvailability(): {
+	content: string;
+	minContentLength: number;
+	isContentTooShort: boolean;
+} {
+	const content =
+		useSelect( ( selectStore ) => {
+			return ( selectStore( editorStore ) as any ).getEditedPostContent();
+		}, [] ) ?? '';
+	const minContentLength: number =
+		( window as any ).aiReviewNotesData?.minContentLength ?? 100;
+
+	return {
+		content,
+		minContentLength,
+		isContentTooShort:
+			count( content, 'characters_including_spaces' ) < minContentLength,
+	};
+}
+
 /**
  * Reviews a single block and creates/updates a Note if suggestions are found.
  *
@@ -165,18 +192,26 @@ export function useReviewNotes(): {
 	progress: number;
 	total: number;
 	lastRunCount: number | null;
+	isContentTooShort: boolean;
+	minContentLength: number;
 	runReview: () => Promise< void >;
 } {
 	const [ isReviewing, setIsReviewing ] = useState< boolean >( false );
 	const [ progress, setProgress ] = useState< number >( 0 );
 	const [ total, setTotal ] = useState< number >( 0 );
 	const [ lastRunCount, setLastRunCount ] = useState< number | null >( null );
+	const { content, isContentTooShort, minContentLength } =
+		useReviewNotesAvailability();
 
 	const runReview = async () => {
 		if ( ! ensureProvider( NOTICE_ID ) ) {
 			return;
 		}
 
+		if ( isContentTooShort ) {
+			return;
+		}
+
 		setIsReviewing( true );
 		setProgress( 0 );
 		setTotal( 0 );
@@ -188,9 +223,6 @@ export function useReviewNotes(): {
 			const postId = (
 				select( editorStore ) as any
 			 ).getCurrentPostId() as number;
-			const content = (
-				select( editorStore ) as any
-			 ).getEditedPostContent() as string;
 
 			// Get all blocks and flatten the tree.
 			const allBlocks = (
@@ -279,7 +311,15 @@ export function useReviewNotes(): {
 		}
 	};
 
-	return { isReviewing, progress, total, lastRunCount, runReview };
+	return {
+		isReviewing,
+		progress,
+		total,
+		lastRunCount,
+		isContentTooShort,
+		minContentLength,
+		runReview,
+	};
 }
 
 /**
@@ -289,11 +329,17 @@ export function useReviewNotes(): {
  */
 export function useReviewBlock(): {
 	isReviewing: boolean;
+	isContentTooShort: boolean;
 	reviewBlock: ( clientId: string ) => Promise< void >;
 } {
 	const [ isReviewing, setIsReviewing ] = useState< boolean >( false );
+	const { content, isContentTooShort } = useReviewNotesAvailability();
 
 	const reviewBlock = async ( clientId: string ) => {
+		if ( isContentTooShort ) {
+			return;
+		}
+
 		setIsReviewing( true );
 
 		( dispatch( noticesStore ) as any ).removeNotice(
@@ -312,9 +358,6 @@ export function useReviewBlock(): {
 			const postId = (
 				select( editorStore ) as any
 			 ).getCurrentPostId() as number;
-			const content = (
-				select( editorStore ) as any
-			 ).getEditedPostContent() as string;
 
 			// Fetch fresh note state for this invocation.
 			const [ pendingNotes, approvedNotes ] = await Promise.all( [
@@ -379,7 +422,7 @@ export function useReviewBlock(): {
 		}
 	};
 
-	return { isReviewing, reviewBlock };
+	return { isReviewing, isContentTooShort, reviewBlock };
 }
 
 /**

tests/Integration/Includes/Experiments/Review_Notes/Review_NotesTest.php

@@ -112,6 +112,46 @@ public function test_ai_note_comment_meta_is_registered() {
 		$this->assertTrue( $registered['ai_note']['show_in_rest'], 'ai_note meta should have show_in_rest enabled' );
 	}
 
+	/**
+	 * Tests that enqueue_assets() localizes the default minimum content length.
+	 *
+	 * @since x.x.x
+	 */
+	public function test_enqueue_assets_localizes_default_min_content_length() {
+		$GLOBALS['wp_scripts'] = new \WP_Scripts();
+
+		$this->experiment->enqueue_assets();
+
+		$this->assertTrue( wp_script_is( 'ai_review_notes', 'enqueued' ) );
+		$this->assertStringContainsString(
+			'"minContentLength":"100"',
+			(string) wp_scripts()->get_data( 'ai_review_notes', 'data' )
+		);
+	}
+
+	/**
+	 * Tests that enqueue_assets() localizes the filtered minimum content length.
+	 *
+	 * @since x.x.x
+	 */
+	public function test_enqueue_assets_localizes_filtered_min_content_length() {
+		$filter = static function () {
+			return 250;
+		};
+
+		add_filter( 'wpai_review_notes_min_content_length', $filter );
+		$GLOBALS['wp_scripts'] = new \WP_Scripts();
+
+		$this->experiment->enqueue_assets();
+
+		remove_filter( 'wpai_review_notes_min_content_length', $filter );
+
+		$this->assertStringContainsString(
+			'"minContentLength":"250"',
+			(string) wp_scripts()->get_data( 'ai_review_notes', 'data' )
+		);
+	}
+
 	// -------------------------------------------------------------------------
 	// maybe_set_ai_author()
 	// -------------------------------------------------------------------------