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A WordPress-centric search engine for devs and theme authors

function _build_block_template_result_from_post( $post ) {
	$post_id = wp_is_post_revision( $post );
	if ( ! $post_id ) {
		$post_id = $post;
	}
	$parent_post     = get_post( $post_id );
	$post->post_name = $parent_post->post_name;
	$post->post_type = $parent_post->post_type;

	$terms = get_the_terms( $parent_post, 'wp_theme' );

	if ( is_wp_error( $terms ) ) {
		return $terms;
	}

	if ( ! $terms ) {
		return new WP_Error( 'template_missing_theme', __( 'No theme is defined for this template.' ) );
	}

	$terms = array(
		'wp_theme' => $terms[0]->name,
	);

	if ( 'wp_template_part' === $parent_post->post_type ) {
		$type_terms = get_the_terms( $parent_post, 'wp_template_part_area' );
		if ( ! is_wp_error( $type_terms ) && false !== $type_terms ) {
			$terms['wp_template_part_area'] = $type_terms[0]->name;
		}
	}

	$meta = array(
		'origin'           => get_post_meta( $parent_post->ID, 'origin', true ),
		'is_wp_suggestion' => get_post_meta( $parent_post->ID, 'is_wp_suggestion', true ),
	);

	$template = _build_block_template_object_from_post_object( $post, $terms, $meta );

	if ( is_wp_error( $template ) ) {
		return $template;
	}

	// Check for a block template without a description and title or with a title equal to the slug.
	if ( 'wp_template' === $parent_post->post_type && empty( $template->description ) && ( empty( $template->title ) || $template->title === $template->slug ) ) {
		$matches = array();

		// Check for a block template for a single author, page, post, tag, category, custom post type, or custom taxonomy.
		if ( preg_match( '/(author|page|single|tag|category|taxonomy)-(.+)/', $template->slug, $matches ) ) {
			$type           = $matches[1];
			$slug_remaining = $matches[2];

			switch ( $type ) {
				case 'author':
					$nice_name = $slug_remaining;
					$users     = get_users(
						array(
							'capability'     => 'edit_posts',
							'search'         => $nice_name,
							'search_columns' => array( 'user_nicename' ),
							'fields'         => 'display_name',
						)
					);

					if ( empty( $users ) ) {
						$template->title = sprintf(
							/* translators: Custom template title in the Site Editor, referencing a deleted author. %s: Author nicename. */
							__( 'Deleted author: %s' ),
							$nice_name
						);
					} else {
						$author_name = $users[0];

						$template->title = sprintf(
							/* translators: Custom template title in the Site Editor. %s: Author name. */
							__( 'Author: %s' ),
							$author_name
						);

						$template->description = sprintf(
							/* translators: Custom template description in the Site Editor. %s: Author name. */
							__( 'Template for %s' ),
							$author_name
						);

						$users_with_same_name = get_users(
							array(
								'capability'     => 'edit_posts',
								'search'         => $author_name,
								'search_columns' => array( 'display_name' ),
								'fields'         => 'display_name',
							)
						);

						if ( count( $users_with_same_name ) > 1 ) {
							$template->title = sprintf(
								/* translators: Custom template title in the Site Editor. 1: Template title of an author template, 2: Author nicename. */
								__( '%1$s (%2$s)' ),
								$template->title,
								$nice_name
							);
						}
					}
					break;
				case 'page':
					_wp_build_title_and_description_for_single_post_type_block_template( 'page', $slug_remaining, $template );
					break;
				case 'single':
					$post_types = get_post_types();

					foreach ( $post_types as $post_type ) {
						$post_type_length = strlen( $post_type ) + 1;

						// If $slug_remaining starts with $post_type followed by a hyphen.
						if ( 0 === strncmp( $slug_remaining, $post_type . '-', $post_type_length ) ) {
							$slug  = substr( $slug_remaining, $post_type_length, strlen( $slug_remaining ) );
							$found = _wp_build_title_and_description_for_single_post_type_block_template( $post_type, $slug, $template );

							if ( $found ) {
								break;
							}
						}
					}
					break;
				case 'tag':
					_wp_build_title_and_description_for_taxonomy_block_template( 'post_tag', $slug_remaining, $template );
					break;
				case 'category':
					_wp_build_title_and_description_for_taxonomy_block_template( 'category', $slug_remaining, $template );
					break;
				case 'taxonomy':
					$taxonomies = get_taxonomies();

					foreach ( $taxonomies as $taxonomy ) {
						$taxonomy_length = strlen( $taxonomy ) + 1;

						// If $slug_remaining starts with $taxonomy followed by a hyphen.
						if ( 0 === strncmp( $slug_remaining, $taxonomy . '-', $taxonomy_length ) ) {
							$slug  = substr( $slug_remaining, $taxonomy_length, strlen( $slug_remaining ) );
							$found = _wp_build_title_and_description_for_taxonomy_block_template( $taxonomy, $slug, $template );

							if ( $found ) {
								break;
							}
						}
					}
					break;
			}
		}
	}

	if ( 'wp_template' === $post->post_type ) {
		$registered_template = WP_Block_Templates_Registry::get_instance()->get_by_slug( $template->slug );
		if ( $registered_template ) {
			$template->plugin      = $registered_template->plugin;
			$template->origin      =
				'theme' !== $template->origin && 'theme' !== $template->source ?
				'plugin' :
				$template->origin;
			$template->title       = empty( $template->title ) || $template->title === $template->slug ? $registered_template->title : $template->title;
			$template->description = empty( $template->description ) ? $registered_template->description : $template->description;
		}
	}

	if ( 'wp_template_part' === $template->type ) {
		$existing_ignored_hooked_blocks = get_post_meta( $post->ID, '_wp_ignored_hooked_blocks', true );
		$attributes                     = ! empty( $existing_ignored_hooked_blocks ) ? array( 'metadata' => array( 'ignoredHookedBlocks' => json_decode( $existing_ignored_hooked_blocks, true ) ) ) : array();

		/*
		 * In order for hooked blocks to be inserted at positions first_child and last_child in a template part,
		 * we need to wrap its content a mock template part block and traverse it.
		 */
		$content           = get_comment_delimited_block_content(
			'core/template-part',
			$attributes,
			$template->content
		);
		$content           = apply_block_hooks_to_content(
			$content,
			$template,
			'insert_hooked_blocks_and_set_ignored_hooked_blocks_metadata'
		);
		$template->content = remove_serialized_parent_block( $content );
	} else {
		$template->content = apply_block_hooks_to_content(
			$template->content,
			$template,
			'insert_hooked_blocks_and_set_ignored_hooked_blocks_metadata'
		);
	}

	return $template;
}