<?php
/**
 * Plugin Name: Patchstack Security
 * Plugin URI:  https://patchstack.com
 * Description: Patchstack identifies security vulnerabilities in WordPress plugins, themes, and core.
 * Version: 2.1.5
 * Author: Patchstack
 * License: GPLv3
 * Text Domain: patchstack
 * Domain Path: /languages
 * Requires at least: 4.4
 * Requires PHP: 5.6
 */

// Do not allow the file to be called directly.
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

if ( ! function_exists( 'patchstack_autoload_classes' ) ) {
	/**
	 * Autoloads the Patchstack classes when called.
	 *
	 * @param string $class_name The class name to autoload.
	 * @return void
	 */
	function patchstack_autoload_classes( $class_name ) {
		// If the requested class doesn't have our prefix, don't load it.
		if ( strpos( $class_name, 'P_' ) !== 0 ) {
			return;
		}

		// Set up our filename.
		$file_name = strtolower( str_replace( '_', '-', substr( $class_name, strlen( 'P_' ) ) ) );
		$dir       = trailingslashit( dirname( __FILE__ ) ) . 'includes/';
		$target    = array( $dir . $file_name . '.php', $dir . 'admin/' . str_replace( 'admin-', '', $file_name ) . '.php' );

		// Attempt each target and load if it exists.
		foreach ( $target as $file ) {
			if ( file_exists( $file ) ) {
				include_once $file;
			}
		}
	}
}
spl_autoload_register( 'patchstack_autoload_classes' );

if ( ! class_exists( 'patchstack' ) ) {

	/**
	 * This is the main Patchstack class used for all Patchstack related features and to launch
	 * the Patchstack plugin.
	 */
	class Patchstack {

		/**
		 * The plugin version.
		 *
		 * @var string
		 */
		const VERSION = '2.1.5';

		/**
		 * API URL of Patchstack to communicate with.
		 *
		 * @var    string
		 */
		const API_URL = 'https://api.patchstack.com';

		/**
		 * API Auth URL of Patchstack to communicate with.
		 *
		 * @var    string
		 */
		const AUTH_URL = 'https://auth.patchstack.com';

		/**
		 * Client ID, this is only set when freshly downloaded from the app.
		 *
		 * @var string
		 */
		const CLIENT_ID = 'PATCHSTACK_CLIENT_ID';

		/**
		 * Client private key, this is only set when freshly downloaded from the app.
		 *
		 * @var string
		 */
		const PRIVATE_KEY = 'PATCHSTACK_PRIVATE_KEY';

		/**
		 * Known IP addresses.
		 *
		 * @var array
		 */
		protected $ips = array( '18.221.197.243', '52.15.237.250', '3.19.3.34', '3.18.238.17', '13.58.49.77', '18.222.191.77', '3.131.108.250', '3.23.157.140', '18.220.70.233', '3.140.84.221', '185.212.171.100' );

		/**
		 * URL of the plugin directory.
		 *
		 * @var string
		 */
		protected $url = '';

		/**
		 * Plugin basename.
		 *
		 * @var string
		 */
		protected $basename = '';

		/**
		 * Plugin name.
		 *
		 * @var string
		 */
		protected $name = '';

		/**
		 * Detailed activation error messages.
		 *
		 * @var array
		 */
		protected $activation_errors = array();

		/**
		 * Singleton instance of plugin.
		 *
		 * @var Patchstack
		 */
		protected static $single_instance = null;

		/**
		 * Define all the variables that will hold the Patchstack classes.
		 * These must be defined because it allows us to communicate from one class to the other.
		 */
		protected $firewall;
		protected $firewall_base;
		protected $activation;
		protected $cron;
		protected $api;
		protected $login;
		protected $ban;
		protected $hardening;
		protected $htaccess;
		protected $hacker_log;
		protected $upload;
		protected $rules;
		protected $hide_login;
		protected $listener;
		protected $event_log;
		protected $multisite;
		protected $notice;
		protected $admin_ajax;
		protected $admin_general;
		protected $admin_menu;
		protected $admin_options;

		/**
		 * Setup a few base variables for the plugin.
		 * Also make sure certain constants are defined.
		 *
		 * @return void
		 */
		protected function __construct() {
			// Set the permission constants if not already set.
			if ( ! defined( 'FS_CHMOD_DIR' ) ) {
				define( 'FS_CHMOD_DIR', ( fileperms( ABSPATH ) & 0777 | 0755 ) );
			}

			if ( ! defined( 'FS_CHMOD_FILE' ) ) {
				define( 'FS_CHMOD_FILE', ( fileperms( ABSPATH . 'index.php' ) & 0777 | 0644 ) );
			}

			// Define local variables.
			$this->basename = plugin_basename( __FILE__ );
			$this->url      = plugin_dir_url( __FILE__ );
			$names          = explode( '/', $this->basename );
			$this->name     = $names[0];
		}

		/**
		 * Call the constructor of all the Patchstack related classes.
		 *
		 * @return void
		 */
		public function plugin_classes() {
			// Define the array of the classes.
			foreach ( array(
				'admin_options' => 'P_Admin_Options',
				'cron'          => 'P_Cron',
				'api'           => 'P_Api',
				'login'         => 'P_Login',
				'ban'           => 'P_Ban',
				'hardening'     => 'P_Hardening',
				'htaccess'      => 'P_Htaccess',
				'hacker_log'    => 'P_Hacker_Log',
				'upload'        => 'P_Upload',
				'rules'         => 'P_Rules',
				'hide_login'    => 'P_Hide_Login',
				'listener'      => 'P_Listener',
				'event_log'     => 'P_Event_Log',
				'activation'    => 'P_Activation',
				'multisite'     => 'P_Multisite',
				'notice'        => 'P_Cookie_Notice',
				'admin_ajax'    => 'P_Admin_Ajax',
				'admin_general' => 'P_Admin_General',
				'admin_menu'    => 'P_Admin_Menu',
			) as $var => $class ) {
				$this->$var = new $class( $this );
			}

			$this->firewall_base = new P_Firewall( true, $this, true );
		}

		/**
		 * Activate the plugin.
		 *
		 * @return void
		 */
		public function activate() {
			$this->plugin_classes();
			$this->activation->activate( $this );
		}

		/**
		 * Deactivate the plugin.
		 *
		 * @return void
		 */
		public function deactivate() {
			$this->plugin_classes();
			$this->activation->deactivate();
		}

		/**
		 * Boot Patchstack and its classes.
		 *
		 * @return void
		 */
		public function hooks() {
			add_action( 'init', array( $this, 'init' ), ~PHP_INT_MAX );
		}

		/**
		 * Boot Patchstack
		 *
		 * @return void
		 */
		public function init() {
			// Load translated strings for plugin.
			load_plugin_textdomain( 'patchstack', false, dirname( $this->basename ) . '/languages/' );

			// Initialize plugin classes.
			$this->plugin_classes();

			// Perform migrations if necessary.
			$this->activation->migrate_check();

			// If license expiration has not been fetched yet while the plugin is active, update it.
			if ( get_option( 'patchstack_api_token', '' ) == '' && get_option( 'patchstack_license_expiry', '' ) == '' ) {
				$this->api->update_license_status();
			}

			// Determine if the license is activated and not expired.
			if ( get_option( 'patchstack_license_activated', 0 ) == 1 && get_option( 'patchstack_basic_firewall', 0 ) == 1 && get_option( 'patchstack_license_free', 0 ) == 0 ) {
				$this->firewall = new P_Firewall( true, $this );
			}
		}

		/**
		 * Creates or returns an instance of this class.
		 *
		 * @return Patchstack
		 */
		public static function get_instance() {
			if ( null === self::$single_instance ) {
				self::$single_instance = new self();
			}

			return self::$single_instance;
		}

		/**
		 * Magic getter.
		 *
		 * @param string $field The field to magically get.
		 * @return mixed
		 */
		public function __get( $field ) {
			switch ( $field ) {
				case 'version':
					return self::VERSION;
				case 'api_url':
					return self::API_URL;
				case 'auth_url':
					return self::AUTH_URL;
				case 'client_id':
					return self::CLIENT_ID;
				case 'private_key':
					return self::PRIVATE_KEY;
				default:
					try {
						return $this->$field;
					} catch ( \Exception $e ) {
						return null;
					}
			}
		}
	}
}

if ( ! function_exists( 'patchstack_uninstall' ) ) {
	/**
	 * Called when the plugin is uninstalled/removed from the site.
	 * This is not the same as deactivation, where the plugin still resides on the site.
	 *
	 * @return void
	 */
	function patchstack_uninstall() {
		// Delete most of the Patchstack options.
		$options = array( 'patchstack_eventlog_lastid', 'patchstack_api_token', 'patchstack_dashboardlock', 'patchstack_pluginedit', 'patchstack_move_logs', 'patchstack_userenum', 'patchstack_basicscanblock', 'patchstack_hidewpcontent', 'patchstack_hidewpversionk', 'patchstack_prevent_default_file_access', 'patchstack_basic_firewall', 'patchstack_known_blacklist', 'patchstack_block_debug_log_access', 'patchstack_block_fake_bots', 'patchstack_index_views', 'patchstack_proxy_comment_posting', 'patchstack_bad_query_strings', 'patchstack_advanced_character_string_filter', 'patchstack_advanced_blacklist_firewall', 'patchstack_forbid_rfi', 'patchstack_image_hotlinking', 'patchstack_add_security_headers', 'patchstack_firewall_log_lastid', 'patchstack_user_log_lastid', 'patchstack_captcha_public_key', 'patchstack_captcha_private_key', 'patchstack_scan_interval', 'patchstack_scan_day', 'patchstack_scan_time', 'patchstack_hackers_log', 'patchstack_users_log', 'patchstack_visitors_log', 'external_updates-webarx', 'patchstack_wp_stats', 'patchstack_captcha_login_form', 'patchstack_license_activated', 'patchstack_license_expiry', 'patchstack_software_data_hash', 'patchstack_mv_wp_login', 'patchstack_rename_wp_login', 'patchstack_googledrive_backup_is_running', 'patchstack_googledrive_upload_state', 'patchstack_googledrive_access_token', 'patchstack_googledrive_refresh_token', 'patchstack_cron_offset', 'patchstack_htaccess_rules_hash' );
		foreach ( $options as $option ) {
			delete_option( $option );

			if ( is_multisite() ) {
				delete_site_option( $option );
			}
		}

		// Drop all Patchstack tables.
		global $wpdb;
		$tables = array( 'patchstack_user_log', 'patchstack_visitor_log', 'patchstack_firewall_log', 'patchstack_file_hashes', 'patchstack_logic', 'patchstack_ip', 'patchstack_event_log' );
		foreach ( $tables as $table ) {
			$wpdb->query( 'DROP TABLE IF EXISTS ' . $wpdb->prefix . $table );
		}
	}
}

if ( ! function_exists( 'patchstack' ) ) {
	/**
	 * Grab the Patchstack object and return it.
	 *
	 * @return Patchstack
	 */
	function patchstack() {
		return patchstack::get_instance();
	}
}

// Kick it off.
add_action( 'plugins_loaded', array( patchstack(), 'hooks' ) );

// Activation and deactivation hooks.
register_activation_hook( __FILE__, array( patchstack(), 'activate' ) );
register_deactivation_hook( __FILE__, array( patchstack(), 'deactivate' ) );
register_uninstall_hook( __FILE__, 'patchstack_uninstall' );