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File Content: `AssetsController.php`

<?php
namespace Automattic\WooCommerce\Blocks;

use Automattic\WooCommerce\Blocks\Assets\Api as AssetApi;

/**
 * AssetsController class.
 *
 * @since 5.0.0
 * @internal
 */
final class AssetsController {

	/**
	 * Asset API interface for various asset registration.
	 *
	 * @var AssetApi
	 */
	private $api;

	/**
	 * Constructor.
	 *
	 * @param AssetApi $asset_api  Asset API interface for various asset registration.
	 */
	public function __construct( AssetApi $asset_api ) {
		$this->api = $asset_api;
		$this->init();
	}

	/**
	 * Initialize class features.
	 */
	protected function init() {
		add_action( 'init', array( $this, 'register_assets' ) );
		add_action( 'enqueue_block_editor_assets', array( $this, 'register_and_enqueue_site_editor_assets' ) );
		add_filter( 'wp_resource_hints', array( $this, 'add_resource_hints' ), 10, 2 );
		add_action( 'body_class', array( $this, 'add_theme_body_class' ), 1 );
		add_action( 'admin_body_class', array( $this, 'add_theme_body_class' ), 1 );
		add_action( 'admin_enqueue_scripts', array( $this, 'update_block_style_dependencies' ), 20 );
		add_action( 'wp_enqueue_scripts', array( $this, 'update_block_settings_dependencies' ), 100 );
		add_action( 'admin_enqueue_scripts', array( $this, 'update_block_settings_dependencies' ), 100 );
	}

	/**
	 * Register block scripts & styles.
	 */
	public function register_assets() {
		$this->register_style( 'wc-blocks-packages-style', plugins_url( $this->api->get_block_asset_build_path( 'packages-style', 'css' ), __DIR__ ), [], 'all', true );
		$this->register_style( 'wc-blocks-style', plugins_url( $this->api->get_block_asset_build_path( 'wc-blocks', 'css' ), __DIR__ ), [], 'all', true );
		$this->register_style( 'wc-blocks-editor-style', plugins_url( $this->api->get_block_asset_build_path( 'wc-blocks-editor-style', 'css' ), __DIR__ ), [ 'wp-edit-blocks' ], 'all', true );

		$this->api->register_script( 'wc-blocks-middleware', 'build/wc-blocks-middleware.js', [], false );
		$this->api->register_script( 'wc-blocks-data-store', 'build/wc-blocks-data.js', [ 'wc-blocks-middleware' ] );
		$this->api->register_script( 'wc-blocks-vendors', $this->api->get_block_asset_build_path( 'wc-blocks-vendors' ), [], false );
		$this->api->register_script( 'wc-blocks-registry', 'build/wc-blocks-registry.js', [], false );
		$this->api->register_script( 'wc-blocks', $this->api->get_block_asset_build_path( 'wc-blocks' ), [ 'wc-blocks-vendors' ], false );
		$this->api->register_script( 'wc-blocks-shared-context', 'build/wc-blocks-shared-context.js' );
		$this->api->register_script( 'wc-blocks-shared-hocs', 'build/wc-blocks-shared-hocs.js', [], false );

		// The price package is shared externally so has no blocks prefix.
		$this->api->register_script( 'wc-price-format', 'build/price-format.js', [], false );

		$this->api->register_script( 'wc-blocks-checkout', 'build/blocks-checkout.js', [] );
		$this->api->register_script( 'wc-blocks-components', 'build/blocks-components.js', [] );

		wp_add_inline_script(
			'wc-blocks-middleware',
			"
			var wcBlocksMiddlewareConfig = {
				storeApiNonce: '" . esc_js( wp_create_nonce( 'wc_store_api' ) ) . "',
				wcStoreApiNonceTimestamp: '" . esc_js( time() ) . "'
			};
			",
			'before'
		);
	}

	/**
	 * Register and enqueue assets for exclusive usage within the Site Editor.
	 */
	public function register_and_enqueue_site_editor_assets() {
		$this->api->register_script( 'wc-blocks-classic-template-revert-button', 'build/wc-blocks-classic-template-revert-button.js' );
		$this->api->register_style( 'wc-blocks-classic-template-revert-button-style', 'build/wc-blocks-classic-template-revert-button-style.css' );

		$current_screen = get_current_screen();
		if ( $current_screen instanceof \WP_Screen && 'site-editor' === $current_screen->base ) {
			wp_enqueue_script( 'wc-blocks-classic-template-revert-button' );
			wp_enqueue_style( 'wc-blocks-classic-template-revert-button-style' );
		}
	}

	/**
	 * Defines resource hints to help speed up the loading of some critical blocks.
	 *
	 * These will not impact page loading times negatively because they are loaded once the current page is idle.
	 *
	 * @param array  $urls          URLs to print for resource hints. Each URL is an array of resource attributes, or a URL string.
	 * @param string $relation_type The relation type the URLs are printed. Possible values: preconnect, dns-prefetch, prefetch, prerender.
	 * @return array URLs to print for resource hints.
	 */
	public function add_resource_hints( $urls, $relation_type ) {
		if ( ! in_array( $relation_type, [ 'prefetch', 'prerender' ], true ) || is_admin() ) {
			return $urls;
		}

		// We only need to prefetch when the cart has contents.
		$cart = wc()->cart;

		if ( ! $cart instanceof \WC_Cart || 0 === $cart->get_cart_contents_count() ) {
			return $urls;
		}

		if ( 'prefetch' === $relation_type ) {
			$urls = array_merge(
				$urls,
				$this->get_prefetch_resource_hints()
			);
		}

		if ( 'prerender' === $relation_type ) {
			$urls = array_merge(
				$urls,
				$this->get_prerender_resource_hints()
			);
		}

		return $urls;
	}

	/**
	 * Get resource hints during prefetch requests.
	 *
	 * @return array Array of URLs.
	 */
	private function get_prefetch_resource_hints() {
		$urls = [];

		// Core page IDs.
		$cart_page_id     = wc_get_page_id( 'cart' );
		$checkout_page_id = wc_get_page_id( 'checkout' );

		// Checks a specific page (by ID) to see if it contains the named block.
		$has_block_cart     = $cart_page_id && has_block( 'woocommerce/cart', $cart_page_id );
		$has_block_checkout = $checkout_page_id && has_block( 'woocommerce/checkout', $checkout_page_id );

		// Checks the current page to see if it contains the named block.
		$is_block_cart     = has_block( 'woocommerce/cart' );
		$is_block_checkout = has_block( 'woocommerce/checkout' );

		if ( $has_block_cart && ! $is_block_cart ) {
			$urls = array_merge( $urls, $this->get_block_asset_resource_hints( 'cart-frontend' ) );
		}

		if ( $has_block_checkout && ! $is_block_checkout ) {
			$urls = array_merge( $urls, $this->get_block_asset_resource_hints( 'checkout-frontend' ) );
		}

		return $urls;
	}

	/**
	 * Get resource hints during prerender requests.
	 *
	 * @return array Array of URLs.
	 */
	private function get_prerender_resource_hints() {
		$urls          = [];
		$is_block_cart = has_block( 'woocommerce/cart' );

		if ( ! $is_block_cart ) {
			return $urls;
		}

		$checkout_page_id  = wc_get_page_id( 'checkout' );
		$checkout_page_url = $checkout_page_id ? get_permalink( $checkout_page_id ) : '';

		if ( $checkout_page_url ) {
			$urls[] = $checkout_page_url;
		}

		return $urls;
	}

	/**
	 * Get resource hint for a block by name.
	 *
	 * @param string $filename Block filename.
	 * @return array
	 */
	private function get_block_asset_resource_hints( $filename = '' ) {
		if ( ! $filename ) {
			return [];
		}
		$script_data = $this->api->get_script_data(
			$this->api->get_block_asset_build_path( $filename )
		);
		$resources   = array_merge(
			[ esc_url( add_query_arg( 'ver', $script_data['version'], $script_data['src'] ) ) ],
			$this->get_script_dependency_src_array( $script_data['dependencies'] )
		);
		return array_map(
			function( $src ) {
				return array(
					'href' => $src,
					'as'   => 'script',
				);
			},
			array_unique( array_filter( $resources ) )
		);
	}

	/**
	 * Get the src of all script dependencies (handles).
	 *
	 * @param array $dependencies Array of dependency handles.
	 * @return string[] Array of src strings.
	 */
	private function get_script_dependency_src_array( array $dependencies ) {
		$wp_scripts = wp_scripts();
		return array_reduce(
			$dependencies,
			function( $src, $handle ) use ( $wp_scripts ) {
				if ( isset( $wp_scripts->registered[ $handle ] ) ) {
					$src[] = esc_url( add_query_arg( 'ver', $wp_scripts->registered[ $handle ]->ver, $this->get_absolute_url( $wp_scripts->registered[ $handle ]->src ) ) );
					$src   = array_merge( $src, $this->get_script_dependency_src_array( $wp_scripts->registered[ $handle ]->deps ) );
				}
				return $src;
			},
			[]
		);
	}

	/**
	 * Returns an absolute url to relative links for WordPress core scripts.
	 *
	 * @param string $src Original src that can be relative.
	 * @return string Correct full path string.
	 */
	private function get_absolute_url( $src ) {
		$wp_scripts = wp_scripts();
		if ( ! preg_match( '|^(https?:)?//|', $src ) && ! ( $wp_scripts->content_url && 0 === strpos( $src, $wp_scripts->content_url ) ) ) {
			$src = $wp_scripts->base_url . $src;
		}
		return $src;
	}

	/**
	 * Add body classes to the frontend and within admin.
	 *
	 * @param string|array $classes Array or string of CSS classnames.
	 * @return string|array Modified classnames.
	 */
	public function add_theme_body_class( $classes ) {
		$class = 'theme-' . get_template();

		if ( is_array( $classes ) ) {
			$classes[] = $class;
		} else {
			$classes .= ' ' . $class . ' ';
		}

		return $classes;
	}

	/**
	 * Get the file modified time as a cache buster if we're in dev mode.
	 *
	 * @param string $file Local path to the file.
	 * @return string The cache buster value to use for the given file.
	 */
	protected function get_file_version( $file ) {
		if ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG && file_exists( \Automattic\WooCommerce\Blocks\Package::get_path() . $file ) ) {
			return filemtime( \Automattic\WooCommerce\Blocks\Package::get_path() . $file );
		}
		return \Automattic\WooCommerce\Blocks\Package::get_version();
	}

	/**
	 * Registers a style according to `wp_register_style`.
	 *
	 * @param string  $handle Name of the stylesheet. Should be unique.
	 * @param string  $src    Full URL of the stylesheet, or path of the stylesheet relative to the WordPress root directory.
	 * @param array   $deps   Optional. An array of registered stylesheet handles this stylesheet depends on. Default empty array.
	 * @param string  $media  Optional. The media for which this stylesheet has been defined. Default 'all'. Accepts media types like
	 *                        'all', 'print' and 'screen', or media queries like '(orientation: portrait)' and '(max-width: 640px)'.
	 * @param boolean $rtl   Optional. Whether or not to register RTL styles.
	 */
	protected function register_style( $handle, $src, $deps = [], $media = 'all', $rtl = false ) {
		$filename = str_replace( plugins_url( '/', __DIR__ ), '', $src );
		$ver      = self::get_file_version( $filename );

		wp_register_style( $handle, $src, $deps, $ver, $media );

		if ( $rtl ) {
			wp_style_add_data( $handle, 'rtl', 'replace' );
		}
	}

	/**
	 * Update block style dependencies after they have been registered.
	 */
	public function update_block_style_dependencies() {
		$wp_styles = wp_styles();
		$style     = $wp_styles->query( 'wc-blocks-style', 'registered' );

		if ( ! $style ) {
			return;
		}

		// In WC < 5.5, `woocommerce-general` is not registered in block editor
		// screens, so we don't add it as a dependency if it's not registered.
		// In WC >= 5.5, `woocommerce-general` is registered on `admin_enqueue_scripts`,
		// so we need to check if it's registered here instead of on `init`.
		if (
			wp_style_is( 'woocommerce-general', 'registered' ) &&
			! in_array( 'woocommerce-general', $style->deps, true )
		) {
			$style->deps[] = 'woocommerce-general';
		}
	}

	/**
	 * Fix scripts with wc-settings dependency.
	 *
	 * The wc-settings script only works correctly when enqueued in the footer. This is to give blocks etc time to
	 * register their settings data before it's printed.
	 *
	 * This code will look at registered scripts, and if they have a wc-settings dependency, force them to print in the
	 * footer instead of the header.
	 *
	 * This only supports packages known to require wc-settings!
	 *
	 * @see https://github.com/woocommerce/woocommerce-gutenberg-products-block/issues/5052
	 */
	public function update_block_settings_dependencies() {
		$wp_scripts     = wp_scripts();
		$known_packages = [ 'wc-settings', 'wc-blocks-checkout', 'wc-price-format' ];

		foreach ( $wp_scripts->registered as $handle => $script ) {
			// scripts that are loaded in the footer has extra->group = 1.
			if ( array_intersect( $known_packages, $script->deps ) && ! isset( $script->extra['group'] ) ) {
				// Append the script to footer.
				$wp_scripts->add_data( $handle, 'group', 1 );
				// Show a warning.
				$error_handle  = 'wc-settings-dep-in-header';
				$used_deps     = implode( ', ', array_intersect( $known_packages, $script->deps ) );
				$error_message = "Scripts that have a dependency on [$used_deps] must be loaded in the footer, {$handle} was registered to load in the header, but has been switched to load in the footer instead. See https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/5059";
				// phpcs:ignore WordPress.WP.EnqueuedResourceParameters.NotInFooter,WordPress.WP.EnqueuedResourceParameters.MissingVersion
				wp_register_script( $error_handle, '' );
				wp_enqueue_script( $error_handle );
				wp_add_inline_script(
					$error_handle,
					sprintf( 'console.warn( "%s" );', $error_message )
				);

			}
		}
	}
}
Name	Size	Permission
AI	---	0755
Assets	---	0755
BlockTypes	---	0755
Domain	---	0755
Images	---	0755
Integrations	---	0755
Interactivity	---	0755
Patterns	---	0755
Payments	---	0755
Registry	---	0755
Shipping	---	0755
StoreApi	---	0755
Templates	---	0755
Utils	---	0755
Assets.php	2839 bytes	0644
AssetsController.php	13146 bytes	0644
BlockPatterns.php	10277 bytes	0644
BlockTemplatesController.php	32220 bytes	0644
BlockTypesController.php	9031 bytes	0644
InboxNotifications.php	583 bytes	0644
Installer.php	4156 bytes	0644
Library.php	1086 bytes	0644
Migration.php	3309 bytes	0644
Options.php	336 bytes	0644
Package.php	3244 bytes	0644
File Content: AssetsController.php

File Content: `AssetsController.php`
