--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/rest-api/endpoints/class-wp-rest-blocks-controller.php	Mon Oct 14 18:28:13 2019 +0200
@@ -0,0 +1,92 @@
+<?php
+/**
+ * Reusable blocks REST API: WP_REST_Blocks_Controller class
+ *
+ * @package WordPress
+ * @subpackage REST_API
+ * @since 5.0.0
+ */
+
+/**
+ * Controller which provides a REST endpoint for the editor to read, create,
+ * edit and delete reusable blocks. Blocks are stored as posts with the wp_block
+ * post type.
+ *
+ * @since 5.0.0
+ *
+ * @see WP_REST_Posts_Controller
+ * @see WP_REST_Controller
+ */
+class WP_REST_Blocks_Controller extends WP_REST_Posts_Controller {
+
+	/**
+	 * Checks if a block can be read.
+	 *
+	 * @since 5.0.0
+	 *
+	 * @param object $post Post object that backs the block.
+	 * @return bool Whether the block can be read.
+	 */
+	public function check_read_permission( $post ) {
+		// Ensure that the user is logged in and has the read_blocks capability.
+		$post_type = get_post_type_object( $post->post_type );
+		if ( ! current_user_can( $post_type->cap->read_post, $post->ID ) ) {
+			return false;
+		}
+
+		return parent::check_read_permission( $post );
+	}
+
+	/**
+	 * Filters a response based on the context defined in the schema.
+	 *
+	 * @since 5.0.0
+	 *
+	 * @param array  $data    Response data to fiter.
+	 * @param string $context Context defined in the schema.
+	 * @return array Filtered response.
+	 */
+	public function filter_response_by_context( $data, $context ) {
+		$data = parent::filter_response_by_context( $data, $context );
+
+		/*
+		 * Remove `title.rendered` and `content.rendered` from the response. It
+		 * doesn't make sense for a reusable block to have rendered content on its
+		 * own, since rendering a block requires it to be inside a post or a page.
+		 */
+		unset( $data['title']['rendered'] );
+		unset( $data['content']['rendered'] );
+
+		return $data;
+	}
+
+	/**
+	 * Retrieves the block's schema, conforming to JSON Schema.
+	 *
+	 * @since 5.0.0
+	 *
+	 * @return array Item schema data.
+	 */
+	public function get_item_schema() {
+		$schema = parent::get_item_schema();
+
+		/*
+		 * Allow all contexts to access `title.raw` and `content.raw`. Clients always
+		 * need the raw markup of a reusable block to do anything useful, e.g. parse
+		 * it or display it in an editor.
+		 */
+		$schema['properties']['title']['properties']['raw']['context']   = array( 'view', 'edit' );
+		$schema['properties']['content']['properties']['raw']['context'] = array( 'view', 'edit' );
+
+		/*
+		 * Remove `title.rendered` and `content.rendered` from the schema. It doesn’t
+		 * make sense for a reusable block to have rendered content on its own, since
+		 * rendering a block requires it to be inside a post or a page.
+		 */
+		unset( $schema['properties']['title']['properties']['rendered'] );
+		unset( $schema['properties']['content']['properties']['rendered'] );
+
+		return $schema;
+	}
+
+}