Block Editor: Add support for the pattern directory.

Add an endpoint for fetching block patterns from WordPress.org, and load the block patterns from this new API. Remove the block patterns that have already been moved to WordPress.org/patterns.

Props ryelle, iandunn, youknowriad, timothyblynjacobs.
Fixes #53246.


Built from https://develop.svn.wordpress.org/trunk@51021


git-svn-id: http://core.svn.wordpress.org/trunk@50630 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/block-patterns.php

@@ -19,21 +19,6 @@ function _register_core_block_patterns_and_categories() {
 
 	if ( $should_register_core_patterns ) {
 		$core_block_patterns = array(
-			'media-text-nature',
-			'two-images-gallery',
-			'three-columns-media-text',
-			'quote',
-			'large-header-left',
-			'large-header-text-button',
-			'media-text-art',
-			'text-two-columns-title',
-			'three-columns-text',
-			'text-two-columns-title-offset',
-			'heading',
-			'three-images-gallery',
-			'text-two-columns',
-			'media-text-arquitecture',
-			'two-buttons',
 			'query-standard-posts',
 			'query-medium-posts',
 			'query-small-posts',
@@ -58,3 +43,43 @@ function _register_core_block_patterns_and_categories() {
 	register_block_pattern_category( 'text', array( 'label' => _x( 'Text', 'Block pattern category' ) ) );
 	register_block_pattern_category( 'query', array( 'label' => __( 'Query', 'Block pattern category' ) ) );
 }
+
+/**
+ * Import patterns from wordpress.org/patterns.
+ */
+function _load_remote_block_patterns( $current_screen ) {
+	if ( ! $current_screen->is_block_editor ) {
+		return;
+	}
+
+	$supports_core_patterns = get_theme_support( 'core-block-patterns' );
+
+	/**
+	 * Filter to disable remote block patterns.
+	 *
+	 * @since 5.8.0
+	 *
+	 * @param bool $should_load_remote
+	 */
+	$should_load_remote = apply_filters( 'should_load_remote_block_patterns', true );
+
+	if ( $supports_core_patterns && $should_load_remote ) {
+		$patterns = get_transient( 'wp_remote_block_patterns' );
+		if ( ! $patterns ) {
+			$request         = new WP_REST_Request( 'GET', '/wp/v2/pattern-directory/patterns' );
+			$core_keyword_id = 11; // 11 is the ID for "core".
+			$request->set_param( 'keyword', $core_keyword_id );
+			$response = rest_do_request( $request );
+			if ( $response->is_error() ) {
+				return;
+			}
+			$patterns = $response->get_data();
+			set_transient( 'wp_remote_block_patterns', $patterns, HOUR_IN_SECONDS );
+		}
+
+		foreach ( $patterns as $settings ) {
+			$pattern_name = 'core/' . sanitize_title( $settings['title'] );
+			register_block_pattern( $pattern_name, (array) $settings );
+		}
+	}
+}