<?php

	/**
	 * Redux Framework Instance Container Class
	 * Automatically captures and stores all instances
	 * of ReduxFrameworkLegacy at instantiation.
	 *
	 * @package     Redux_Framework
	 * @subpackage  Core
	 */
class ReduxFrameworkInstancesLegacy {

	/**
	 * ReduxFrameworkInstancesLegacy
	 *
	 * @var object
	 */
	private static $instance;

	/**
	 * ReduxFrameworkLegacy instances
	 *
	 * @var array
	 */
	private static $instances;


	/**
	 * @var array
	 */
	private $options = array();

	/**
	 * Get Instance
	 * Get ReduxFrameworkInstancesLegacy instance
	 * OR an instance of ReduxFrameworkLegacy by [opt_name]
	 *
	 * @param  string $opt_name the defined opt_name
	 *
	 * @return object                class instance
	 */
	public static function get_instance( $opt_name = false ) {

		if ( is_null( self::$instance ) ) {
			self::$instance = new self();
		}

		if ( $opt_name && ! empty( self::$instances[ $opt_name ] ) ) {
			return self::$instances[ $opt_name ];
		}

		return self::$instance;
	}

	/**
	 * Get all instantiated ReduxFrameworkLegacy instances (so far)
	 *
	 * @return [type] [description]
	 */
	public static function get_all_instances() {
		return self::$instances;
	}

	private function __construct() {

		add_action( 'redux/construct', array( $this, 'capture' ), 5, 1 );

		$hash = md5( trailingslashit( network_site_url() ) . '-redux' );
		add_action( 'wp_ajax_nopriv_' . $hash, array( $this, 'tracking_arg' ) );
		add_action( 'wp_ajax_' . $hash, array( $this, 'tracking_arg' ) );

		/**
		 * Fix https://www.wordfence.com/blog/2021/09/over-1-million-sites-affected-by-redux-framework-vulnerabilities/
		 *
		 * // if (!class_exists('ReduxLegacy_Tracking') || !method_exists('ReduxLegacy_Tracking', 'trackingObject')) {
		 *      $hash = md5( md5( ReduxLegacy_Helpers::get_auth_key_secret_key() . '-redux' ) . '-support' );
		 *      add_action( 'wp_ajax_nopriv_' . $hash, array( $this, 'support_args' ) );
		 *      add_action( 'wp_ajax_' . $hash, array( $this, 'support_args' ) );
		 *    }
		 */
	}

	function tracking_arg() {
		echo md5( ReduxLegacy_Helpers::get_auth_key_secret_key() . '-redux' );
		die();
	}

	function support_args() {

		$this->options             = get_option( 'redux-framework-tracking' );
		$this->options['dev_mode'] = false;

		if ( ! isset( $this->options['hash'] ) || ! $this->options['hash'] || empty( $this->options['hash'] ) ) {
			$this->options['hash'] = md5( network_site_url() . '-' . $_SERVER['REMOTE_ADDR'] );
			update_option( 'redux-framework-tracking', $this->options );
		}

		if ( isset( $_GET['redux_framework_disable_tracking'] ) && ! empty( $_GET['redux_framework_disable_tracking'] ) ) {
			$this->options['allow_tracking'] = false;
			update_option( 'redux-framework-tracking', $this->options );
		}

		if ( isset( $_GET['redux_framework_enable_tracking'] ) && ! empty( $_GET['redux_framework_enable_tracking'] ) ) {
			$this->options['allow_tracking'] = true;
			update_option( 'redux-framework-tracking', $this->options );
		}

		header( 'Expires: Mon, 26 Jul 1997 05:00:00 GMT' );
		header( 'Last-Modified: ' . gmdate( 'D, d M Y H:i:s' ) . 'GMT' );
		header( 'Expires: Sat, 26 Jul 1997 05:00:00 GMT' );
		header( 'Cache-Control: no-store, no-cache, must-revalidate' );
		header( 'Cache-Control: post-check=0, pre-check=0', false );
		header( 'Pragma: no-cache' );
		$instances = self::get_all_instances();

		$array = array();

		if ( isset( $_REQUEST['i'] ) && ! empty( $_REQUEST['i'] ) ) {
			if ( is_array( $instances ) && ! empty( $instances ) ) {
				foreach ( $instances as $opt_name => $data ) {
					if ( md5( $opt_name . '-debug' ) == $_REQUEST['i'] ) {
						$array = $instances[ $opt_name ];
					}
					if ( $data->args['dev_mode'] ) {
						$this->options['dev_mode'] = $data->args['dev_mode'];
					}
				}
			}
			if ( isset( $array ) ) {
				if ( isset( $array->extensions ) && is_array( $array->extensions ) && ! empty( $array->extensions ) ) {
					foreach ( $array->extensions as $key => $extension ) {
						if ( isset( $extension->version ) ) {
							$array->extensions[ $key ] = $extension->version;
						} else {
							$array->extensions[ $key ] = true;
						}
					}
				}

				if ( isset( $array->import_export ) ) {
					unset( $array->import_export );
				}

				if ( isset( $array->debug ) ) {
					unset( $array->debug );
				}
			} else {
				die();
			}
		} else {
			$array = ReduxLegacy_Helpers::trackingObject();
			if ( is_array( $instances ) && ! empty( $instances ) ) {
				$array['instances'] = array();
				foreach ( $instances as $opt_name => $data ) {
					$array['instances'][] = $opt_name;
				}
			}
			$array['key'] = md5( ReduxLegacy_Helpers::get_auth_key_secret_key() );
		}

		echo @json_encode( $array, true );
		die();
	}

	function capture( $ReduxFrameworkLegacy ) {
		$this->store( $ReduxFrameworkLegacy );
	}

	private function store( $ReduxFrameworkLegacy ) {
		if ( $ReduxFrameworkLegacy instanceof ReduxFrameworkLegacy ) {
			$key                     = $ReduxFrameworkLegacy->args['opt_name'];
			self::$instances[ $key ] = $ReduxFrameworkLegacy;
		}
	}
}