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✏️ Editing: BlockTemplatesController.php

<?php
declare( strict_types=1 );
namespace Automattic\WooCommerce\Blocks;

use Automattic\WooCommerce\Blocks\Utils\BlockTemplateUtils;
use Automattic\WooCommerce\Blocks\Templates\ComingSoonTemplate;
use Automattic\WooCommerce\Blocks\Utils\Utils;

/**
 * BlockTemplatesController class.
 *
 * @internal
 */
class BlockTemplatesController {

/**
	 * Directory which contains all templates
	 *
	 * @var string
	 */
	const TEMPLATES_ROOT_DIR = 'templates';

/**
	 * Initialization method.
	 */
	public function init() {
		add_filter( 'pre_get_block_file_template', array( $this, 'get_block_file_template' ), 10, 3 );
		add_filter( 'get_block_template', array( $this, 'add_block_template_details' ), 10, 3 );
		add_filter( 'get_block_templates', array( $this, 'add_db_templates_with_woo_slug' ), 10, 3 );
		add_filter( 'rest_pre_insert_wp_template', array( $this, 'dont_load_templates_for_suggestions' ), 10, 1 );
		add_filter( 'block_type_metadata_settings', array( $this, 'add_plugin_templates_parts_support' ), 10, 2 );
		add_filter( 'block_type_metadata_settings', array( $this, 'prevent_shortcodes_html_breakage' ), 10, 2 );
		add_action( 'current_screen', array( $this, 'hide_template_selector_in_cart_checkout_pages' ), 10 );
		add_action( 'wp_enqueue_scripts', [ $this, 'dequeue_legacy_scripts' ], 20 );

// Fix a bug in WordPress 6.8 and lower that caused block hooks not to
		// run in templates registered via the Template Registration API.
		// @see https://github.com/WordPress/gutenberg/issues/71139.
		if ( Utils::wp_version_compare( '6.8', '<=' ) ) {
			add_filter( 'get_block_templates', array( $this, 'run_hooks_on_block_templates' ), 10, 3 );
		}
	}

/**
	 * Dequeue legacy scripts that have no usage with block themes.
	 */
	public function dequeue_legacy_scripts() {
		if ( ! wp_is_block_theme() ) {
			return;
		}

if ( is_product() ) {
			wp_dequeue_script( 'wc-single-product' );
		}
	}

/**
	 * Renders the `core/template-part` block on the server.
	 *
	 * This is done because the core handling for template parts only supports templates from the current theme, not
	 * from a plugin.
	 *
	 * @param array $attributes The block attributes.
	 * @return string The render.
	 */
	public function render_woocommerce_template_part( $attributes ) {
		if ( isset( $attributes['theme'] ) && 'woocommerce/woocommerce' === $attributes['theme'] ) {
			$template_part = get_block_template( $attributes['theme'] . '//' . $attributes['slug'], 'wp_template_part' );

if ( $template_part && ! empty( $template_part->content ) ) {
				$content = do_blocks( $template_part->content );

if ( empty( $attributes['tagName'] ) || tag_escape( $attributes['tagName'] ) !== $attributes['tagName'] ) {
					$html_tag = 'div';
				} else {
					$html_tag = esc_attr( $attributes['tagName'] );
				}
				$wrapper_attributes = get_block_wrapper_attributes();

return "<$html_tag $wrapper_attributes>" . str_replace( ']]>', ']]&gt;', $content ) . "</$html_tag>";
			}
		}
		return function_exists( '\gutenberg_render_block_core_template_part' ) ? \gutenberg_render_block_core_template_part( $attributes ) : \render_block_core_template_part( $attributes );
	}

/**
	 * By default, the Template Part Block only supports template parts that are in the current theme directory.
	 * This render_callback wrapper allows us to add support for plugin-housed template parts.
	 *
	 * @param array $settings Array of determined settings for registering a block type.
	 * @param array $metadata     Metadata provided for registering a block type.
	 */
	public function add_plugin_templates_parts_support( $settings, $metadata ) {
		if (
			isset( $metadata['name'], $settings['render_callback'] ) &&
			'core/template-part' === $metadata['name'] &&
			in_array( $settings['render_callback'], array( 'render_block_core_template_part', 'gutenberg_render_block_core_template_part' ), true )
		) {
			$settings['render_callback'] = array( $this, 'render_woocommerce_template_part' );
		}
		return $settings;
	}

/**
	 * Prevents shortcodes in templates having their HTML content broken by wpautop.
	 *
	 * @see https://core.trac.wordpress.org/ticket/58366 for more info.
	 *
	 * @param array $settings Array of determined settings for registering a block type.
	 * @param array $metadata     Metadata provided for registering a block type.
	 */
	public function prevent_shortcodes_html_breakage( $settings, $metadata ) {
		if (
				isset( $metadata['name'], $settings['render_callback'] ) &&
				'core/shortcode' === $metadata['name']
			) {
			$settings['original_render_callback'] = $settings['render_callback'];
			$settings['render_callback']          = function ( $attributes, $content ) use ( $settings ) {
				// The shortcode has already been rendered, so look for the cart/checkout HTML.
				if ( strstr( $content, 'woocommerce-cart-form' ) || strstr( $content, 'wc-empty-cart-message' ) || strstr( $content, 'woocommerce-checkout-form' ) ) {
					// Return early before wpautop runs again.
					return $content;
				}

$render_callback = $settings['original_render_callback'];

return $render_callback( $attributes, $content );
			};
		}
		return $settings;
	}

/**
	 * Prevents the pages that are assigned as Cart/Checkout from showing the "template" selector in the page-editor.
	 * We want to avoid this flow and point users towards the Site Editor instead.
	 *
	 * @return void
	 */
	public function hide_template_selector_in_cart_checkout_pages() {
		if ( ! is_admin() ) {
			return;
		}

$current_screen = get_current_screen();

// phpcs:ignore WordPress.Security.NonceVerification.Recommended
		if ( $current_screen && 'page' === $current_screen->id && ! empty( $_GET['post'] ) && in_array( absint( $_GET['post'] ), array( wc_get_page_id( 'cart' ), wc_get_page_id( 'checkout' ) ), true ) ) {
			wp_add_inline_style( 'wc-blocks-editor-style', '.edit-post-post-template { display: none; }' );
		}
	}

/**
	 * This function checks if there's a block template file in `woocommerce/templates/templates/`
	 * to return to pre_get_posts short-circuiting the query in Gutenberg.
	 *
	 * @param \WP_Block_Template|null $template Return a block template object to short-circuit the default query,
	 *                                               or null to allow WP to run its normal queries.
	 * @param string                  $id Template unique identifier (example: theme_slug//template_slug).
	 * @param string                  $template_type wp_template or wp_template_part.
	 *
	 * @return mixed|\WP_Block_Template|\WP_Error
	 */
	public function get_block_file_template( $template, $id, $template_type ) {
		$template_name_parts = explode( '//', $id );

if ( count( $template_name_parts ) < 2 ) {
			return $template;
		}

list( $template_id, $template_slug ) = $template_name_parts;

// This is a real edge-case, we are supporting users who have saved templates under the deprecated slug. See its definition for more information.
		// You can likely ignore this code unless you're supporting/debugging early customised templates.
		if ( BlockTemplateUtils::DEPRECATED_PLUGIN_SLUG === strtolower( $template_id ) ) {
			// Because we are using get_block_templates we have to unhook this method to prevent a recursive loop where this filter is applied.
			remove_filter( 'pre_get_block_file_template', array( $this, 'get_block_file_template' ), 10, 3 );
			$template_with_deprecated_id = get_block_template( $id, $template_type );
			// Let's hook this method back now that we have used the function.
			add_filter( 'pre_get_block_file_template', array( $this, 'get_block_file_template' ), 10, 3 );

if ( null !== $template_with_deprecated_id ) {
				return $template_with_deprecated_id;
			}
		}

// If we are not dealing with a WooCommerce template let's return early and let it continue through the process.
		if ( BlockTemplateUtils::PLUGIN_SLUG !== $template_id ) {
			return $template;
		}

// If we don't have a template let Gutenberg do its thing.
		if ( ! $this->block_template_is_available( $template_slug, $template_type ) ) {
			return $template;
		}

$directory          = BlockTemplateUtils::get_templates_directory( $template_type );
		$template_file_path = $directory . '/' . $template_slug . '.html';
		$template_object    = BlockTemplateUtils::create_new_block_template_object( $template_file_path, $template_type, $template_slug );
		$template_built     = BlockTemplateUtils::build_template_result_from_file( $template_object, $template_type );

if ( null !== $template_built ) {
			return $template_built;
		}

// Hand back over to Gutenberg if we can't find a template.
		return $template;
	}

/**
	 * Add the template title and description to WooCommerce templates.
	 *
	 * @param WP_Block_Template|null $block_template The found block template, or null if there isn't one.
	 * @param string                 $id             Template unique identifier (example: 'theme_slug//template_slug').
	 * @param array                  $template_type  Template type: 'wp_template' or 'wp_template_part'.
	 * @return WP_Block_Template|null
	 */
	public function add_block_template_details( $block_template, $id, $template_type ) {
		return BlockTemplateUtils::update_template_data( $block_template, $template_type );
	}

/**
	 * Run hooks on block templates.
	 *
	 * @param array $templates The block templates.
	 * @return array The block templates.
	 */
	public function run_hooks_on_block_templates( $templates ) {
		foreach ( $templates as $template ) {
			if ( 'plugin' === $template->source && 'woocommerce' === $template->plugin ) {
				$template->content = apply_block_hooks_to_content( $template->content, $template, 'insert_hooked_blocks_and_set_ignored_hooked_blocks_metadata' );
			}
		}

return $templates;
	}

/**
	 * Add the block template objects currently saved in the database with the WooCommerce slug.
	 * That is, templates that have been customised before WooCommerce started to use the
	 * Template Registration API.
	 *
	 * @param array  $query_result Array of template objects.
	 * @param array  $query Optional. Arguments to retrieve templates.
	 * @param string $template_type wp_template or wp_template_part.
	 * @return array
	 */
	public function add_db_templates_with_woo_slug( $query_result, $query, $template_type ) {
		$slugs = isset( $query['slug__in'] ) ? $query['slug__in'] : array();

if ( ! BlockTemplateUtils::supports_block_templates( $template_type ) && ! in_array( ComingSoonTemplate::SLUG, $slugs, true ) ) {
			return $query_result;
		}

// For templates, we only need to load templates from the database. For
		// template parts, we also need to load them from the filesystem, as
		// there is no Template registration API for template parts.
		$template_files = 'wp_template' === $template_type ? BlockTemplateUtils::get_block_templates_from_db( $slugs, $template_type ) : $this->get_block_templates( $slugs, $template_type );
		$new_templates  = array();

foreach ( $template_files as $template_file ) {
			// It would be custom if the template was modified in the editor, so if it's not custom we can load it from
			// the filesystem.
			if ( 'custom' === $template_file->source ) {
				if (
					BlockTemplateUtils::PLUGIN_SLUG === $template_file->theme ||
					BlockTemplateUtils::DEPRECATED_PLUGIN_SLUG === $template_file->theme
				) {
					array_unshift( $new_templates, $template_file );
				}
				continue;
			}

// We only need to build templates from the filesystem for template parts.
			// Regular templates are handled by the Template registration API.
			if ( 'wp_template_part' === $template_type ) {
				$theme_slug            = get_stylesheet();
				$possible_template_ids = [
					$theme_slug . '//' . $template_file->slug,
					$theme_slug . '//' . BlockTemplateUtils::DIRECTORY_NAMES['TEMPLATE_PARTS'] . '/' . $template_file->slug,
					$theme_slug . '//' . BlockTemplateUtils::DIRECTORY_NAMES['DEPRECATED_TEMPLATE_PARTS'] . '/' . $template_file->slug,
				];

$is_custom                 = false;
				$query_result_template_ids = array_column( $query_result, 'id' );

foreach ( $possible_template_ids as $template_id ) {
					if ( in_array( $template_id, $query_result_template_ids, true ) ) {
						$is_custom = true;
						break;
					}
				}
				$fits_slug_query    =
					! isset( $query['slug__in'] ) || in_array( $template_file->slug, $query['slug__in'], true );
				$fits_area_query    =
					! isset( $query['area'] ) || ( property_exists( $template_file, 'area' ) && $template_file->area === $query['area'] );
				$is_from_filesystem = isset( $template_file->path );
				$should_include     = ! $is_custom && $fits_slug_query && $fits_area_query && $is_from_filesystem;

if ( $should_include ) {
					$template       = BlockTemplateUtils::build_template_result_from_file( $template_file, $template_type );
					$query_result[] = $template;
				}
			}
		}

$query_result = array_merge( $new_templates, $query_result );

if ( count( $new_templates ) > 0 ) {
			// If there are certain templates that have been customised with the `woocommerce/woocommerce` slug,
			// We prioritize them over the theme and WC templates. That is, we remove the theme and WC templates
			// from the results and only keep the customised ones.
			$query_result = BlockTemplateUtils::remove_templates_with_custom_alternative( $query_result );

// There is the chance that the user customized the default template, installed a theme with a custom template
			// and customized that one as well. When that happens, duplicates might appear in the list.
			// See: https://github.com/woocommerce/woocommerce/issues/42220.
			$query_result = BlockTemplateUtils::remove_duplicate_customized_templates( $query_result );
		}

/**
		 * WC templates from theme aren't included in `$this->get_block_templates()` but are handled by Gutenberg.
		 * We need to do additional search through all templates file to update title and description for WC
		 * templates that aren't listed in theme.json.
		 */
		$query_result = array_map(
			function ( $template ) use ( $template_type ) {
				return BlockTemplateUtils::update_template_data( $template, $template_type );
			},
			$query_result
		);

return $query_result;
	}

/**
	 * When creating a template from the WP suggestion, don't load the templates with the WooCommerce slug.
	 * Otherwise they take precedence and the new template can't be created.
	 *
	 * @param stdClass $prepared_post An object representing a single post prepared
	 *                                for inserting or updating the database.
	 */
	public function dont_load_templates_for_suggestions( $prepared_post ) {
		if ( isset( $prepared_post->meta_input['is_wp_suggestion'] ) ) {
			remove_filter( 'get_block_templates', array( $this, 'add_db_templates_with_woo_slug' ), 10, 3 );
		}
		return $prepared_post;
	}

/**
	 * Gets the templates from the WooCommerce blocks directory, skipping those for which a template already exists
	 * in the theme directory.
	 *
	 * @param string[] $slugs An array of slugs to filter templates by. Templates whose slug does not match will not be returned.
	 * @param array    $already_found_templates Templates that have already been found, these are customised templates that are loaded from the database.
	 * @param string   $template_type wp_template or wp_template_part.
	 *
	 * @return array Templates from the WooCommerce blocks plugin directory.
	 */
	public function get_block_templates_from_woocommerce( $slugs, $already_found_templates, $template_type = 'wp_template' ) {
		$template_files = BlockTemplateUtils::get_template_paths( $template_type );
		$templates      = array();

foreach ( $template_files as $template_file ) {
			// Skip the template if it's blockified, and we should only use classic ones.
			if ( ! BlockTemplateUtils::should_use_blockified_product_grid_templates() && strpos( $template_file, 'blockified' ) !== false ) {
				continue;
			}

$template_slug = BlockTemplateUtils::generate_template_slug_from_path( $template_file );

// This template does not have a slug we're looking for. Skip it.
			if ( is_array( $slugs ) && count( $slugs ) > 0 && ! in_array( $template_slug, $slugs, true ) ) {
				continue;
			}

// If the theme already has a template, or the template is already in the list (i.e. it came from the
			// database) then we should not overwrite it with the one from the filesystem.
			if (
				BlockTemplateUtils::theme_has_template( $template_slug ) ||
				count(
					array_filter(
						$already_found_templates,
						function ( $template ) use ( $template_slug ) {
							$template_obj = (object) $template; //phpcs:ignore WordPress.CodeAnalysis.AssignmentInCondition.Found
							return $template_obj->slug === $template_slug;
						}
					)
				) > 0 ) {
				continue;
			}

// At this point the template only exists in the Blocks filesystem and has not been saved in the DB,
			// or superseded by the theme.
			$templates[] = BlockTemplateUtils::create_new_block_template_object( $template_file, $template_type, $template_slug );
		}

return $templates;
	}

/**
	 * Get and build the block template objects from the block template files.
	 *
	 * @param array  $slugs An array of slugs to retrieve templates for.
	 * @param string $template_type wp_template or wp_template_part.
	 *
	 * @return array WP_Block_Template[] An array of block template objects.
	 */
	public function get_block_templates( $slugs = array(), $template_type = 'wp_template' ) {
		$templates_from_db  = BlockTemplateUtils::get_block_templates_from_db( $slugs, $template_type );
		$templates_from_woo = $this->get_block_templates_from_woocommerce( $slugs, $templates_from_db, $template_type );

return array_merge( $templates_from_db, $templates_from_woo );
	}

/**
	 * Checks whether a block template with that name exists in Woo Blocks
	 *
	 * @param string $template_name Template to check.
	 * @param array  $template_type wp_template or wp_template_part.
	 *
	 * @return boolean
	 */
	public function block_template_is_available( $template_name, $template_type = 'wp_template' ) {
		if ( ! $template_name ) {
			return false;
		}
		$directory = BlockTemplateUtils::get_templates_directory( $template_type ) . '/' . $template_name . '.html';

return is_readable(
			$directory
		) || $this->get_block_templates( array( $template_name ), $template_type );
	}
}

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