WP_REST_Widgets_Controller::delete_item() WordPress Method

	public function delete_item( $request ) {
		global $wp_widget_factory, $wp_registered_widget_updates;

		/*
		 * retrieve_widgets() contains logic to move "hidden" or "lost" widgets to the
		 * wp_inactive_widgets sidebar based on the contents of the $sidebars_widgets global.
		 *
		 * When batch requests are processed, this global is not properly updated by previous
		 * calls, resulting in widgets incorrectly being moved to the wp_inactive_widgets
		 * sidebar.
		 *
		 * See https://core.trac.wordpress.org/ticket/53657.
		 */
		wp_get_sidebars_widgets();
		$this->retrieve_widgets();

		$widget_id  = $request['id'];
		$sidebar_id = wp_find_widgets_sidebar( $widget_id );

		if ( is_null( $sidebar_id ) ) {
			return new WP_Error(
				'rest_widget_not_found',
				__( 'No widget was found with that id.' ),
				array( 'status' => 404 )
			);
		}

		$request['context'] = 'edit';

		if ( $request['force'] ) {
			$response = $this->prepare_item_for_response( compact( 'widget_id', 'sidebar_id' ), $request );

			$parsed_id = wp_parse_widget_id( $widget_id );
			$id_base   = $parsed_id['id_base'];

			$original_post    = $_POST;
			$original_request = $_REQUEST;

			$_POST    = array(
				'sidebar'         => $sidebar_id,
				"widget-$id_base" => array(),
				'the-widget-id'   => $widget_id,
				'delete_widget'   => '1',
			);
			$_REQUEST = $_POST;

			/** This action is documented in wp-admin/widgets-form.php */
			do_action( 'delete_widget', $widget_id, $sidebar_id, $id_base );

			$callback = $wp_registered_widget_updates[ $id_base ]['callback'];
			$params   = $wp_registered_widget_updates[ $id_base ]['params'];

			if ( is_callable( $callback ) ) {
				ob_start();
				call_user_func_array( $callback, $params );
				ob_end_clean();
			}

			$_POST    = $original_post;
			$_REQUEST = $original_request;

			$widget_object = $wp_widget_factory->get_widget_object( $id_base );

			if ( $widget_object ) {
				/*
				 * WP_Widget sets `updated = true` after an update to prevent more than one widget
				 * from being saved per request. This isn't what we want in the REST API, though,
				 * as we support batch requests.
				 */
				$widget_object->updated = false;
			}

			wp_assign_widget_to_sidebar( $widget_id, '' );

			$response->set_data(
				array(
					'deleted'  => true,
					'previous' => $response->get_data(),
				)
			);
		} else {
			wp_assign_widget_to_sidebar( $widget_id, 'wp_inactive_widgets' );

			$response = $this->prepare_item_for_response(
				array(
					'sidebar_id' => 'wp_inactive_widgets',
					'widget_id'  => $widget_id,
				),
				$request
			);
		}

		/**
		 * Fires after a widget is deleted via the REST API.
		 *
		 * @since 5.8.0
		 *
		 * @param string                    $widget_id  ID of the widget marked for deletion.
		 * @param string                    $sidebar_id ID of the sidebar the widget was deleted from.
		 * @param WP_REST_Response|WP_Error $response   The response data, or WP_Error object on failure.
		 * @param WP_REST_Request           $request    The request sent to the API.
		 */
		do_action( 'rest_delete_widget', $widget_id, $sidebar_id, $response, $request );

		return $response;
	}