From b0f4c2c37e68a808c7b16a1ff5267baac621f430 Mon Sep 17 00:00:00 2001
From: gziolo <gziolo@git.wordpress.org>
Date: Mon, 12 Sep 2022 13:14:13 +0000
Subject: [PATCH] Blocks: Add new `render` property in `block.json` for block
 types

New `render` field in `block.json` file that accepts a string value. It allows to pass a path to the PHP file that is going to be used to render the block on the server.  Related PR in Gutenberg: https://github.com/WordPress/gutenberg/pull/42430.

Props spacedmonkey, luisherranz, welcher, noisysocks, matveb, fabiankaegy, aristath, zieladam.
Fixes #53148.


Built from https://develop.svn.wordpress.org/trunk@54132


git-svn-id: http://core.svn.wordpress.org/trunk@53691 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/blocks.php  | 28 ++++++++++++++++++++++++++++
 wp-includes/version.php |  2 +-
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/wp-includes/blocks.php b/wp-includes/blocks.php
index e731f5bd5b..0d21094b0d 100644
--- a/wp-includes/blocks.php
+++ b/wp-includes/blocks.php
@@ -235,6 +235,7 @@ function get_block_metadata_i18n_schema() {
  * @since 5.5.0
  * @since 5.7.0 Added support for `textdomain` field and i18n handling for all translatable fields.
  * @since 5.9.0 Added support for `variations` and `viewScript` fields.
+ * @since 6.1.0 Added support for `render` field.
  *
  * @param string $file_or_folder Path to the JSON file with metadata definition for
  *                               the block or path to the folder where the `block.json` file is located.
@@ -345,6 +346,33 @@ function register_block_type_from_metadata( $file_or_folder, $args = array() ) {
 		);
 	}
 
+	if ( ! empty( $metadata['render'] ) ) {
+		$template_path = wp_normalize_path(
+			realpath(
+				dirname( $metadata['file'] ) . '/' .
+				remove_block_asset_path_prefix( $metadata['render'] )
+			)
+		);
+		if ( file_exists( $template_path ) ) {
+			/**
+			 * Renders the block on the server.
+			 *
+			 * @since 6.1.0
+			 *
+			 * @param array    $attributes Block attributes.
+			 * @param string   $content    Block default content.
+			 * @param WP_Block $block      Block instance.
+			 *
+			 * @return string Returns the block content.
+			 */
+			$settings['render_callback'] = function( $attributes, $content, $block ) use ( $template_path ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
+				ob_start();
+				require $template_path;
+				return ob_get_clean();
+			};
+		}
+	}
+
 	/**
 	 * Filters the settings determined from the block type metadata.
 	 *
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 0a477f71bb..e3d8ab83d4 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.1-alpha-54131';
+$wp_version = '6.1-alpha-54132';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.