From 530deb6a65a411ad1cec80a96ee94d11e4c3eb2f Mon Sep 17 00:00:00 2001
From: Ramon <ramonjd@users.noreply.github.com>
Date: Thu, 10 Aug 2023 16:12:46 +1000
Subject: [PATCH] Patterns: add `delete_posts` to the wp_block (patterns)
 capabilities (#53405)

* Adding `delete_posts` to the wp_block (patterns) capabilities

* - Adding a bit of defensive code just in case `$args['capabilities']` type isn't what we expect.

* - Conditions were in the wrong order. We want to check for the existence of `$args['capabilities']` before typing checking. If the first expression fails we skip the second, otherwise there'll be a PHP error.
---
 lib/compat/wordpress-6.4/blocks.php | 23 +++++++++++++++++++++++
 lib/load.php                        |  3 +++
 2 files changed, 26 insertions(+)
 create mode 100644 lib/compat/wordpress-6.4/blocks.php

diff --git a/lib/compat/wordpress-6.4/blocks.php b/lib/compat/wordpress-6.4/blocks.php
new file mode 100644
index 00000000000000..74fa9253e45d50
--- /dev/null
+++ b/lib/compat/wordpress-6.4/blocks.php
@@ -0,0 +1,23 @@
+<?php
+/**
+ * Temporary compatibility shims for block APIs present in Gutenberg.
+ *
+ * @package gutenberg
+ */
+
+/**
+ * Adds delete_posts capabilities to the wp_block post type.
+ *
+ * @param array $args Register post type args.
+ *
+ * @return array Register post type args.
+ */
+function gutenberg_add_custom_capabilities_to_wp_block( $args ) {
+	if ( is_array( $args ) ) {
+		if ( ! isset( $args['capabilities'] ) || is_array( $args['capabilities'] ) ) {
+			$args['capabilities']['delete_posts'] = 'delete_posts';
+		}
+	}
+	return $args;
+}
+add_filter( 'register_wp_block_post_type_args', 'gutenberg_add_custom_capabilities_to_wp_block', 10, 1 );
diff --git a/lib/load.php b/lib/load.php
index 98b0c1a77dcc0d..a11fba175d421e 100644
--- a/lib/load.php
+++ b/lib/load.php
@@ -118,6 +118,9 @@ function gutenberg_is_experiment_enabled( $name ) {
 require __DIR__ . '/compat/wordpress-6.3/block-editor-settings.php';
 require_once __DIR__ . '/compat/wordpress-6.3/kses.php';
 
+// WordPress 6.4 compat.
+require __DIR__ . '/compat/wordpress-6.4/blocks.php';
+
 // Experimental features.
 require __DIR__ . '/experimental/block-editor-settings-mobile.php';
 require __DIR__ . '/experimental/blocks.php';