Header/Footer: Add API route stubs.

These are still experimental and may change significantly. See #45
WordPress · Jan 4, 2022 · 373b3fe · 373b3fe
1 parent 59e7133
commit 373b3fe
Showing 1 changed file with 52 additions and 5 deletions.
diff --git a/mu-plugins/blocks/global-header-footer/blocks.php b/mu-plugins/blocks/global-header-footer/blocks.php
@@ -1,14 +1,14 @@
 <?php
 
 namespace WordPressdotorg\MU_Plugins\Global_Header_Footer;
-use Rosetta_Sites;
+use Rosetta_Sites, WP_REST_Server;
 
 defined( 'WPINC' ) || die();
 
 add_action( 'init', __NAMESPACE__ . '\register_block_types' );
 add_action( 'enqueue_block_assets', __NAMESPACE__ . '\register_block_types_js' );
 add_filter( 'pre_set_transient_global_styles_wporg-news-2021', __NAMESPACE__ . '\save_dependent_global_styles' );
-
+add_action( 'rest_api_init', __NAMESPACE__ . '\register_routes' );
 
 /**
  * Register block types
@@ -60,6 +60,33 @@ function register_block_types() {
 	);
 }
 
+/**
+ * Register REST API routes, so non-WP applications can integrate it.
+ */
+function register_routes() {
+	register_rest_route(
+		'global-header-footer/v1',
+		'header',
+		array(
+			array(
+				'methods'  => WP_REST_Server::READABLE,
+				'callback' => __NAMESPACE__ . '\render_global_header',
+			),
+		)
+	);
+
+	register_rest_route(
+		'global-header-footer/v1',
+		'footer',
+		array(
+			array(
+				'methods'  => WP_REST_Server::READABLE,
+				'callback' => __NAMESPACE__ . '\render_global_footer',
+			),
+		)
+	);
+}
+
 /**
  * Register block types in JS, for the editor.
  *
@@ -166,13 +193,25 @@ function render_global_header() {
 
 	restore_inner_group_container();
 
-	// Render the classic markup second, so the `wp_head()` call will execute callbacks that blocks added above.
-	if ( ! wp_is_block_theme() ) {
+	$is_rest_request = defined( 'REST_REQUEST' ) && REST_REQUEST;
+
+	/*
+	 * Render the classic markup second, so the `wp_head()` call will execute callbacks that blocks added above.
+	 *
+	 * API requests also need `<head>` etc so they can get the styles.
+	 */
+	if ( ! wp_is_block_theme() || $is_rest_request ) {
 		ob_start();
 		require __DIR__ . '/classic-header.php';
 		$markup = ob_get_clean() . $markup;
 	}
 
+	if ( $is_rest_request ) {
+		header( 'Content-Type: text/html' );
+		echo $markup;
+		die(); // this is an ugly hack. todo get the api to return html
+	}
+
 	return $markup;
 }
 
@@ -438,13 +477,21 @@ function render_global_footer() {
 
 	restore_inner_group_container();
 
+	$is_rest_request = defined( 'REST_REQUEST' ) && REST_REQUEST;
+
 	// Render the classic markup second, so the `wp_footer()` call will execute callbacks that blocks added.
-	if ( ! wp_is_block_theme() ) {
+	if ( ! wp_is_block_theme() || $is_rest_request ) {
 		ob_start();
 		require_once __DIR__ . '/classic-footer.php';
 		$markup .= ob_get_clean();
 	}
 
+	if ( $is_rest_request ) {
+		header( 'Content-Type: text/html' );
+		echo $markup;
+		die(); // this is an ugly hack. todo get the api to return html
+	}
+
 	return $markup;
 }