<?php
/**
 * Temporary compatibility shims for features present in Gutenberg, pending
 * upstream commit to the WordPress core source repository. Functions here
 * exist only as long as necessary for corresponding WordPress support, and
 * each should be associated with a Trac ticket.
 *
 * @package gutenberg
 */

/**
 * Determine if the current theme needs to load separate block styles or not.
 *
 * @return bool
 */
function gutenberg_should_load_separate_block_assets() {
	$load_separate_styles = gutenberg_is_fse_theme();
	/**
	 * Determine if separate styles will be loaded for blocks on-render or not.
	 *
	 * @param bool $load_separate_styles Whether separate styles will be loaded or not.
	 *
	 * @return bool
	 */
	return apply_filters( 'load_separate_block_assets', $load_separate_styles );
}

/**
 * Remove the `wp_enqueue_registered_block_scripts_and_styles` hook if needed.
 *
 * @return void
 */
function gutenberg_remove_hook_wp_enqueue_registered_block_scripts_and_styles() {
	if ( gutenberg_should_load_separate_block_assets() ) {
		/**
		 * Avoid enqueueing block assets of all registered blocks for all posts, instead
		 * deferring to block render mechanics to enqueue scripts, thereby ensuring only
		 * blocks of the content have their assets enqueued.
		 *
		 * This can be removed once minimum support for the plugin is outside the range
		 * of the version associated with closure of the following ticket.
		 *
		 * @see https://core.trac.wordpress.org/ticket/50328
		 *
		 * @see WP_Block::render
		 */
		remove_action( 'enqueue_block_assets', 'wp_enqueue_registered_block_scripts_and_styles' );
	}
}

add_action( 'init', 'gutenberg_remove_hook_wp_enqueue_registered_block_scripts_and_styles' );

/**
 * Callback hooked to the register_block_type_args filter.
 *
 * This hooks into block registration to inject the default context into the block object.
 * It can be removed once the default context is added into Core.
 *
 * @param array $args Block attributes.
 * @return array Block attributes.
 */
function gutenberg_inject_default_block_context( $args ) {
	if ( is_callable( $args['render_callback'] ) ) {
		$block_render_callback   = $args['render_callback'];
		$args['render_callback'] = function( $attributes, $content, $block = null ) use ( $block_render_callback ) {
			global $post, $wp_query;

			// Check for null for back compatibility with WP_Block_Type->render
			// which is unused since the introduction of WP_Block class.
			//
			// See:
			// - https://core.trac.wordpress.org/ticket/49927
			// - commit 910de8f6890c87f93359c6f2edc6c27b9a3f3292 at wordpress-develop.

			if ( null === $block ) {
				return $block_render_callback( $attributes, $content );
			}

			$registry   = WP_Block_Type_Registry::get_instance();
			$block_type = $registry->get_registered( $block->name );

			// For WordPress versions that don't support the context API.
			if ( ! $block->context ) {
				$block->context = array();
			}

			// Inject the post context if not done by Core.
			$needs_post_id = ! empty( $block_type->uses_context ) && in_array( 'postId', $block_type->uses_context, true );
			if ( $post instanceof WP_Post && $needs_post_id && ! isset( $block->context['postId'] ) && 'wp_template' !== $post->post_type && 'wp_template_part' !== $post->post_type ) {
				$block->context['postId'] = $post->ID;
			}
			$needs_post_type = ! empty( $block_type->uses_context ) && in_array( 'postType', $block_type->uses_context, true );
			if ( $post instanceof WP_Post && $needs_post_type && ! isset( $block->context['postType'] ) && 'wp_template' !== $post->post_type && 'wp_template_part' !== $post->post_type ) {
				/*
				* The `postType` context is largely unnecessary server-side, since the
				* ID is usually sufficient on its own. That being said, since a block's
				* manifest is expected to be shared between the server and the client,
				* it should be included to consistently fulfill the expectation.
				*/
				$block->context['postType'] = $post->post_type;
			}

			// Inject the query context if not done by Core.
			$needs_query = ! empty( $block_type->uses_context ) && in_array( 'query', $block_type->uses_context, true );
			if ( ! isset( $block->context['query'] ) && $needs_query ) {
				if ( isset( $wp_query->tax_query->queried_terms['category'] ) ) {
					$block->context['query'] = array( 'categoryIds' => array() );

					foreach ( $wp_query->tax_query->queried_terms['category']['terms'] as $category_slug_or_id ) {
						$block->context['query']['categoryIds'][] = 'slug' === $wp_query->tax_query->queried_terms['category']['field'] ? get_cat_ID( $category_slug_or_id ) : $category_slug_or_id;
					}
				}

				if ( isset( $wp_query->tax_query->queried_terms['post_tag'] ) ) {
					if ( isset( $block->context['query'] ) ) {
						$block->context['query']['tagIds'] = array();
					} else {
						$block->context['query'] = array( 'tagIds' => array() );
					}

					foreach ( $wp_query->tax_query->queried_terms['post_tag']['terms'] as $tag_slug_or_id ) {
						$tag_ID = $tag_slug_or_id;

						if ( 'slug' === $wp_query->tax_query->queried_terms['post_tag']['field'] ) {
							$tag = get_term_by( 'slug', $tag_slug_or_id, 'post_tag' );

							if ( $tag ) {
								$tag_ID = $tag->term_id;
							}
						}
						$block->context['query']['tagIds'][] = $tag_ID;
					}
				}
			}

			return $block_render_callback( $attributes, $content, $block );
		};
	}
	return $args;
}

add_filter( 'register_block_type_args', 'gutenberg_inject_default_block_context' );

/**
 * Amends the paths to preload when initializing edit post.
 *
 * @see https://core.trac.wordpress.org/ticket/50606
 *
 * @since 8.4.0
 *
 * @param  array $preload_paths Default path list that will be preloaded.
 * @return array Modified path list to preload.
 */
function gutenberg_preload_edit_post( $preload_paths ) {
	$additional_paths = array( '/?context=edit' );
	return array_merge( $preload_paths, $additional_paths );
}

add_filter( 'block_editor_preload_paths', 'gutenberg_preload_edit_post' );

/**
 * Override post type labels for Reusable Block custom post type.
 * The labels are different from the ones in Core.
 *
 * Remove this when Core receives the new labels (minimum supported version WordPress 5.8)
 *
 * @return array Array of new labels for Reusable Block post type.
 */
function gutenberg_override_reusable_block_post_type_labels() {
	return array(
		'name'                     => _x( 'Reusable blocks', 'post type general name', 'gutenberg' ),
		'singular_name'            => _x( 'Reusable block', 'post type singular name', 'gutenberg' ),
		'menu_name'                => _x( 'Reusable blocks', 'admin menu', 'gutenberg' ),
		'name_admin_bar'           => _x( 'Reusable block', 'add new on admin bar', 'gutenberg' ),
		'add_new'                  => _x( 'Add New', 'Reusable block', 'gutenberg' ),
		'add_new_item'             => __( 'Add new Reusable block', 'gutenberg' ),
		'new_item'                 => __( 'New Reusable block', 'gutenberg' ),
		'edit_item'                => __( 'Edit Reusable block', 'gutenberg' ),
		'view_item'                => __( 'View Reusable block', 'gutenberg' ),
		'all_items'                => __( 'All Reusable blocks', 'gutenberg' ),
		'search_items'             => __( 'Search Reusable blocks', 'gutenberg' ),
		'not_found'                => __( 'No reusable blocks found.', 'gutenberg' ),
		'not_found_in_trash'       => __( 'No reusable blocks found in Trash.', 'gutenberg' ),
		'filter_items_list'        => __( 'Filter reusable blocks list', 'gutenberg' ),
		'items_list_navigation'    => __( 'Reusable blocks list navigation', 'gutenberg' ),
		'items_list'               => __( 'Reusable blocks list', 'gutenberg' ),
		'item_published'           => __( 'Reusable block published.', 'gutenberg' ),
		'item_published_privately' => __( 'Reusable block published privately.', 'gutenberg' ),
		'item_reverted_to_draft'   => __( 'Reusable block reverted to draft.', 'gutenberg' ),
		'item_scheduled'           => __( 'Reusable block scheduled.', 'gutenberg' ),
		'item_updated'             => __( 'Reusable block updated.', 'gutenberg' ),
	);
}
add_filter( 'post_type_labels_wp_block', 'gutenberg_override_reusable_block_post_type_labels', 10, 0 );