or other layouts.' ),
		)
	);
	register_block_pattern_category(
		'footer',
		array(
			'label'       => _x( 'Footers', 'Block pattern category' ),
			'description' => __( 'A variety of footer designs displaying information and site navigation.' ),
		)
	);
	register_block_pattern_category(
		'header',
		array(
			'label'       => _x( 'Headers', 'Block pattern category' ),
			'description' => __( 'A variety of header designs displaying your site title and navigation.' ),
		)
	);
}

/**
 * Normalize the pattern properties to camelCase.
 *
 * The API's format is snake_case, `register_block_pattern()` expects camelCase.
 *
 * @since 6.2.0
 * @access private
 *
 * @param array $pattern Pattern as returned from the Pattern Directory API.
 * @return array Normalized pattern.
 */
function wp_normalize_remote_block_pattern( $pattern ) {
	if ( isset( $pattern['block_types'] ) ) {
		$pattern['blockTypes'] = $pattern['block_types'];
		unset( $pattern['block_types'] );
	}

	if ( isset( $pattern['viewport_width'] ) ) {
		$pattern['viewportWidth'] = $pattern['viewport_width'];
		unset( $pattern['viewport_width'] );
	}

	return (array) $pattern;
}

/**
 * Register Core's official patterns from wordpress.org/patterns.
 *
 * @since 5.8.0
 * @since 5.9.0 The $current_screen argument was removed.
 * @since 6.2.0 Normalize the pattern from the API (snake_case) to the
 *              format expected by `register_block_pattern` (camelCase).
 * @since 6.3.0 Add 'pattern-directory/core' to the pattern's 'source'.
 *
 * @param WP_Screen $deprecated Unused. Formerly the screen that the current request was triggered from.
 */
function _load_remote_block_patterns( $deprecated = null ) {
	if ( ! empty( $deprecated ) ) {
		_deprecated_argument( __FUNCTION__, '5.9.0' );
		$current_screen = $deprecated;
		if ( ! $current_screen->is_block_editor ) {
			return;
		}
	}

	$supports_core_patterns = get_theme_support( 'core-block-patterns' );

	/**
	 * Filter to disable remote block patterns.
	 *
	 * @since 5.8.0
	 *
	 * @param bool $should_load_remote
	 */
	$should_load_remote = apply_filters( 'should_load_remote_block_patterns', true );

	if ( $supports_core_patterns && $should_load_remote ) {
		$request         = new WP_REST_Request( 'GET', '/wp/v2/pattern-directory/patterns' );
		$core_keyword_id = 11; // 11 is the ID for "core".
		$request->set_param( 'keyword', $core_keyword_id );
		$response = rest_do_request( $request );
		if ( $response->is_error() ) {
			return;
		}
		$patterns = $response->get_data();

		foreach ( $patterns as $pattern ) {
			$pattern['source']  = 'pattern-directory/core';
			$normalized_pattern = wp_normalize_remote_block_pattern( $pattern );
			$pattern_name       = 'core/' . sanitize_title( $normalized_pattern['title'] );
			register_block_pattern( $pattern_name, $normalized_pattern );
		}
	}
}

/**
 * Register `Featured` (category) patterns from wordpress.org/patterns.
 *
 * @since 5.9.0
 * @since 6.2.0 Normalized the pattern from the API (snake_case) to the
 *              format expected by `register_block_pattern()` (camelCase).
 * @since 6.3.0 Add 'pattern-directory/featured' to the pattern's 'source'.
 */
function _load_remote_featured_patterns() {
	$supports_core_patterns = get_theme_support( 'core-block-patterns' );

	/** This filter is documented in wp-includes/block-patterns.php */
	$should_load_remote = apply_filters( 'should_load_remote_block_patterns', true );

	if ( ! $should_load_remote || ! $supports_core_patterns ) {
		return;
	}

	$request         = new WP_REST_Request( 'GET', '/wp/v2/pattern-directory/patterns' );
	$featured_cat_id = 26; // This is the `Featured` category id from pattern directory.
	$request->set_param( 'category', $featured_cat_id );
	$response = rest_do_request( $request );
	if ( $response->is_error() ) {
		return;
	}
	$patterns = $response->get_data();
	$registry = WP_Block_Patterns_Registry::get_instance();
	foreach ( $patterns as $pattern ) {
		$pattern['source']  = 'pattern-directory/featured';
		$normalized_pattern = wp_normalize_remote_block_pattern( $pattern );
		$pattern_name       = sanitize_title( $normalized_pattern['title'] );
		// Some patterns might be already registered as core patterns with the `core` prefix.
		$is_registered = $registry->is_registered( $pattern_name ) || $registry->is_registered( "core/$pattern_name" );
		if ( ! $is_registered ) {
			register_block_pattern( $pattern_name, $normalized_pattern );
		}
	}
}

/**
 * Registers patterns from Pattern Directory provided by a theme's
 * `theme.json` file.
 *
 * @since 6.0.0
 * @since 6.2.0 Normalized the pattern from the API (snake_case) to the
 *              format expected by `register_block_pattern()` (camelCase).
 * @since 6.3.0 Add 'pattern-directory/theme' to the pattern's 'source'.
 * @access private
 */
function _register_remote_theme_patterns() {
	/** This filter is documented in wp-includes/block-patterns.php */
	if ( ! apply_filters( 'should_load_remote_block_patterns', true ) ) {
		return;
	}

	if ( ! wp_theme_has_theme_json() ) {
		return;
	}

	$pattern_settings = wp_get_theme_directory_pattern_slugs();
	if ( empty( $pattern_settings ) ) {
		return;
	}

	$request         = new WP_REST_Request( 'GET', '/wp/v2/pattern-directory/patterns' );
	$request['slug'] = $pattern_settings;
	$response        = rest_do_request( $request );
	if ( $response->is_error() ) {
		return;
	}
	$patterns          = $response->get_data();
	$patterns_registry = WP_Block_Patterns_Registry::get_instance();
	foreach ( $patterns as $pattern ) {
		$pattern['source']  = 'pattern-directory/theme';
		$normalized_pattern = wp_normalize_remote_block_pattern( $pattern );
		$pattern_name       = sanitize_title( $normalized_pattern['title'] );
		// Some patterns might be already registered as core patterns with the `core` prefix.
		$is_registered = $patterns_registry->is_registered( $pattern_name ) || $patterns_registry->is_registered( "core/$pattern_name" );
		if ( ! $is_registered ) {
			register_block_pattern( $pattern_name, $normalized_pattern );
		}
	}
}

/**
 * Register any patterns that the active theme may provide under its
 * `./patterns/` directory.
 *
 * @since 6.0.0
 * @since 6.1.0 The `postTypes` property was added.
 * @since 6.2.0 The `templateTypes` property was added.
 * @since 6.4.0 Uses the `WP_Theme::get_block_patterns` method.
 * @access private
 */
function _register_theme_block_patterns() {

	/*
	 * During the bootstrap process, a check for active and valid themes is run.
	 * If no themes are returned, the theme's functions.php file will not be loaded,
	 * which can lead to errors if patterns expect some variables or constants to
	 * already be set at this point, so bail early if that is the case.
	 */
	if ( empty( wp_get_active_and_valid_themes() ) ) {
		return;
	}

	/*
	 * Register patterns for the active theme. If the theme is a child theme,
	 * let it override any patterns from the parent theme that shares the same slug.
	 */
	$themes   = array();
	$theme    = wp_get_theme();
	$themes[] = $theme;
	if ( $theme->parent() ) {
		$themes[] = $theme->parent();
	}
	$registry = WP_Block_Patterns_Registry::get_instance();

	foreach ( $themes as $theme ) {
		$patterns    = $theme->get_block_patterns();
		$dirpath     = $theme->get_stylesheet_directory() . '/patterns/';
		$text_domain = $theme->get( 'TextDomain' );

		foreach ( $patterns as $file => $pattern_data ) {
			if ( $registry->is_registered( $pattern_data['slug'] ) ) {
				continue;
			}

			$file_path = $dirpath . $file;

			if ( ! file_exists( $file_path ) ) {
				_doing_it_wrong(
					__FUNCTION__,
					sprintf(
						/* translators: %s: file name. */
						__( 'Could not register file "%s" as a block pattern as the file does not exist.' ),
						$file
					),
					'6.4.0'
				);
				$theme->delete_pattern_cache();
				continue;
			}

			// The actual pattern content is the output of the file.
			ob_start();
			include $file_path;
			$pattern_data['content'] = ob_get_clean();
			if ( ! $pattern_data['content'] ) {
				continue;
			}

			// Translate the pattern metadata.
			// phpcs:ignore WordPress.WP.I18n.NonSingularStringLiteralText,WordPress.WP.I18n.NonSingularStringLiteralDomain,WordPress.WP.I18n.LowLevelTranslationFunction
			$pattern_data['title'] = translate_with_gettext_context( $pattern_data['title'], 'Pattern title', $text_domain );
			if ( ! empty( $pattern_data['description'] ) ) {
				// phpcs:ignore WordPress.WP.I18n.NonSingularStringLiteralText,WordPress.WP.I18n.NonSingularStringLiteralDomain,WordPress.WP.I18n.LowLevelTranslationFunction
				$pattern_data['description'] = translate_with_gettext_context( $pattern_data['description'], 'Pattern description', $text_domain );
			}

			register_block_pattern( $pattern_data['slug'], $pattern_data );
		}
	}
}
add_action( 'init', '_register_theme_block_patterns' );