<?php
namespace Affilizz\Util;

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly
}

use Affilizz\Core;

/**
 * Excludes the rendering script from the JavaScript delay, minification and concatenation of WP Rocket, and of the
 * equivalent plugins whose hooks could be checked in their source : delayed, the widgets stay empty until the first
 * interaction ; minified again, the already minified script breaks. Other plugins : see the FAQ of readme.txt.
 */
class Rocket {
	// Declare the traits used by the class
	use \Affilizz\Util\Generic;

	/**
	 * Registers the exclusions.
	 * @author Affilizz <wordpress@affilizz.com>
	 * @since 1.18.0
	 * @return void
	 */
	public function __construct() {
		// WP Rocket : regular expressions, matched against the whole script tag (delay), the file path (minify,
		// combine) and the URL of the external files (minify, combine).
		if ( defined( 'WP_ROCKET_VERSION' ) ) {
			add_filter( 'rocket_delay_js_exclusions', array( $this, 'add_exclusions' ) );
			add_filter( 'rocket_exclude_js', array( $this, 'add_exclusions' ) );
			add_filter( 'rocket_minify_excluded_external_js', array( $this, 'add_exclusions' ) );
		}

		// LiteSpeed Cache : substrings of the script URL (minify / combine, defer / delay, guest mode).
		add_filter( 'litespeed_optimize_js_excludes', array( $this, 'add_exclusions' ) );
		add_filter( 'litespeed_optm_js_defer_exc', array( $this, 'add_exclusions' ) );
		add_filter( 'litespeed_optm_gm_js_exc', array( $this, 'add_exclusions' ) );

		// Autoptimize : substrings of the script tag or path (aggregation), files considered as already minified.
		add_filter( 'autoptimize_filter_js_exclude', array( $this, 'add_autoptimize_exclusions' ) );
		add_filter( 'autoptimize_filter_js_consider_minified', array( $this, 'add_exclusions' ) );

		// WP-Optimize : substrings of the script URL (minify). Its "Delay JS" exclusions have no filter.
		add_filter( 'wp-optimize-minify-default-exclusions', array( $this, 'add_exclusions' ) );
	}

	/**
	 * Returns the patterns identifying the rendering script : the end of the path of the local copy (uuid/hash.js,
	 * which also matches it behind a CDN rewrite) and the CDN URL without its scheme.
	 * @author Affilizz <wordpress@affilizz.com>
	 * @since 1.18.0
	 * @return Array The patterns, filtered by "affilizz_rocket_exclusions" (return an empty array to disable).
	 */
	public static function get_exclusions() {
		// The path, not get_diverted_js_file_url() : it may download the script, and this runs during the page render
		$local_copy_path = ( Assets::get_instance() )->get_diverted_js_file_path();
		$exclusions      = array(
			basename( dirname( $local_copy_path ) ) . '/' . basename( $local_copy_path ),
			preg_replace( '#^https?://#i', '', Core::get_rendering_script_location() ),
		);

		return array_values( array_filter( (array) apply_filters( 'affilizz_rocket_exclusions', $exclusions ) ) );
	}

	/**
	 * Adds the patterns to a list of exclusions.
	 * @author Affilizz <wordpress@affilizz.com>
	 * @since 1.18.0
	 * @param $exclusions The current exclusions.
	 * @return Array The updated exclusions.
	 */
	public function add_exclusions( $exclusions = array() ) {
		return array_merge( is_array( $exclusions ) ? $exclusions : array(), self::get_exclusions() );
	}

	/**
	 * Adds the patterns to the Autoptimize exclusions, either a comma-separated string or an array of pattern => flag.
	 * @author Affilizz <wordpress@affilizz.com>
	 * @since 1.18.0
	 * @param $exclusions The current exclusions.
	 * @return String|Array The updated exclusions.
	 */
	public function add_autoptimize_exclusions( $exclusions = '' ) {
		if ( is_array( $exclusions ) ) {
			return array_merge( $exclusions, array_fill_keys( self::get_exclusions(), '' ) );
		}
		return implode( ', ', array_filter( array_merge( array( trim( (string) $exclusions ) ), self::get_exclusions() ) ) );
	}
}