From 96c6c273dd8bc2d94a2b080f4eba69211d310561 Mon Sep 17 00:00:00 2001
From: oandregal <oandregal@git.wordpress.org>
Date: Fri, 11 Aug 2023 11:24:11 +0000
Subject: [PATCH] Themes: add wp_get_theme_data_template_parts function.

Adds a new public function, `wp_get_theme_data_template_parts` that returns the `templateParts` defined by the active theme from `theme.json`. It also substitutes the usage of private APIs by this new API.

Props felixarntz.
Fixes #59003

Built from https://develop.svn.wordpress.org/trunk@56385


git-svn-id: http://core.svn.wordpress.org/trunk@55897 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/block-template-utils.php       |  2 +-
 wp-includes/global-styles-and-settings.php | 31 ++++++++++++++++++++++
 wp-includes/version.php                    |  2 +-
 3 files changed, 33 insertions(+), 2 deletions(-)

diff --git a/wp-includes/block-template-utils.php b/wp-includes/block-template-utils.php
index 226b2068da..88bda858f0 100644
--- a/wp-includes/block-template-utils.php
+++ b/wp-includes/block-template-utils.php
@@ -431,7 +431,7 @@ function _add_block_template_info( $template_item ) {
  */
 function _add_block_template_part_area_info( $template_info ) {
 	if ( wp_theme_has_theme_json() ) {
-		$theme_data = WP_Theme_JSON_Resolver::get_theme_data( array(), array( 'with_supports' => false ) )->get_template_parts();
+		$theme_data = wp_get_theme_data_template_parts();
 	}
 
 	if ( isset( $theme_data[ $template_info['slug'] ]['area'] ) ) {
diff --git a/wp-includes/global-styles-and-settings.php b/wp-includes/global-styles-and-settings.php
index 5b95855752..0f1ca5c82b 100644
--- a/wp-includes/global-styles-and-settings.php
+++ b/wp-includes/global-styles-and-settings.php
@@ -425,6 +425,7 @@ function wp_clean_theme_json_cache() {
 	wp_cache_delete( 'wp_get_global_settings_custom', 'theme_json' );
 	wp_cache_delete( 'wp_get_global_settings_theme', 'theme_json' );
 	wp_cache_delete( 'wp_get_global_styles_custom_css', 'theme_json' );
+	wp_cache_delete( 'wp_get_theme_data_template_parts', 'theme_json' );
 	WP_Theme_JSON_Resolver::clean_cached_data();
 }
 
@@ -440,6 +441,36 @@ function wp_get_theme_directory_pattern_slugs() {
 	return WP_Theme_JSON_Resolver::get_theme_data( array(), array( 'with_supports' => false ) )->get_patterns();
 }
 
+/**
+ * Returns the metadata for the template parts defined by the theme.
+ *
+ * @since 6.4.0
+ *
+ * return array Associative array of `$part_name => $part_data` pairs, with `$part_data` having "title" and "area" fields.
+ */
+function wp_get_theme_data_template_parts() {
+	$cache_group    = 'theme_json';
+	$cache_key      = 'wp_get_theme_data_template_parts';
+	$can_use_cached = ! wp_is_development_mode( 'theme' );
+
+	$metadata = false;
+	if ( $can_use_cached ) {
+		$metadata = wp_cache_get( $cache_key, $cache_group );
+		if ( false !== $metadata ) {
+			return $metadata;
+		}
+	}
+
+	if ( false === $metadata ) {
+		$metadata = WP_Theme_JSON_Resolver::get_theme_data( array(), array( 'with_supports' => false ) )->get_template_parts();
+		if ( $can_use_cached ) {
+			wp_cache_set( $cache_key, $metadata, $cache_group );
+		}
+	}
+
+	return $metadata;
+}
+
 /**
  * Determines the CSS selector for the block type and property provided,
  * returning it if available.
diff --git a/wp-includes/version.php b/wp-includes/version.php
index c24f5633ee..2bfff3d33c 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.4-alpha-56384';
+$wp_version = '6.4-alpha-56385';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.