<?php

/**
 * Preload necessary resources for the editors.
 *
 * @param array                   $paths   REST API paths to preload.
 * @param WP_Block_Editor_Context $context Current block editor context
 *
 * @return array Filtered preload paths.
 */
function gutenberg_block_editor_preload_paths_6_9( $paths, $context ) {
	if ( 'core/edit-site' === $context->name ) {
		// Only prefetch for the root. If we preload it for all pages and it's not used
		// it won't be possible to invalidate.
		// To do: perhaps purge all preloaded paths when client side navigating.
		if ( isset( $_GET['p'] ) && '/' !== $_GET['p'] ) {
			$paths = array_filter(
				$paths,
				static function ( $path ) {
					return '/wp/v2/templates/lookup?slug=front-page' !== $path && '/wp/v2/templates/lookup?slug=home' !== $path;
				}
			);
		}
	}

	return $paths;
}
add_filter( 'block_editor_rest_api_preload_paths', 'gutenberg_block_editor_preload_paths_6_9', 10, 2 );