<?php
/**
 * MainWP Page Speed
 *
 * MainWP Page Speed extension handler.
 * Extension URL: https://mainwp.com/extension/page-speed/
 *
 * @package MainWP\Child
 *
 * Credits
 *
 * Plugin-Name: Google Pagespeed Insights
 * Plugin-URI: http://mattkeys.me
 * Author: Matt Keys
 * Author URI: http://mattkeys.me
 * License: GPLv2 or later
 */

namespace MainWP\Child;

// phpcs:disable PSR1.Classes.ClassDeclaration, WordPress.WP.AlternativeFunctions --  to use external code, third party credit.

/**
 * Class MainWP_Child_Pagespeed
 *
 * MainWP Page Speed extension handler.
 */
class MainWP_Child_Pagespeed {

    /**
     * Public static variable to hold the single instance of the class.
     *
     * @var mixed Default null
     */
    public static $instance = null;

    /**
     * Public variable to hold the infomration if the Google Pagespeed Insights plugin is installed on the child site.
     *
     * @var bool If Google Pagespeed Insights intalled, return true, if not, return false.
     */
    public $is_plugin_installed = false;

    /**
     * Method instance()
     *
     * Create a public static instance.
     *
     * @return mixed Class instance.
     */
    public static function instance() {
        if ( null === self::$instance ) {
            self::$instance = new self();
        }

        return self::$instance;
    }

    /**
     * MainWP_Child_Pagespeed constructor.
     *
     * Run any time class is called.
     *
     * @return void
     */
    public function __construct() {
        require_once ABSPATH . 'wp-admin/includes/plugin.php';
        if ( is_plugin_active( 'google-pagespeed-insights/google-pagespeed-insights.php' ) ) {
            $this->is_plugin_installed = true;
        }

        if ( ! $this->is_plugin_installed ) {
            return;
        }

        add_filter( 'mainwp_site_sync_others_data', array( $this, 'sync_others_data' ), 10, 2 );

        add_action( 'mainwp_child_deactivation', array( $this, 'child_deactivation' ) );
    }

    /**
     * Method sync_others_data()
     *
     * Sync the Google Pagespeed Insights plugin data.
     *
     * @param  array $information Array containing the sync information.
     * @param  array $data        Array containing the Google Pagespeed Insights plugin data to be synced.
     *
     * @return array $information Array containing the sync information.
     */
    public function sync_others_data( $information, $data = array() ) {
        if ( isset( $data['syncPageSpeedData'] ) && $data['syncPageSpeedData'] ) {
            try {
                $information['syncPageSpeedData'] = $this->get_sync_data();
            } catch ( \Exception $e ) {
                // ok!
            }
        }
        return $information;
    }

    /**
     * Method child_deactivation()
     *
     * Unschedule scheduled events on MainWP Child plugin deactivation.
     */
    public function child_deactivation() {
        $sched = wp_next_scheduled( 'mainwp_child_pagespeed_cron_check' );
        if ( $sched ) {
            wp_unschedule_event( $sched, 'mainwp_child_pagespeed_cron_check' );
        }
    }

    /**
     * Method init()
     *
     * Initiate action hooks.
     *
     * @return void
     */
    public function init() {
        if ( ! $this->is_plugin_installed ) {
            return;
        }

        if ( 'hide' === get_option( 'mainwp_pagespeed_hide_plugin' ) ) {
            add_filter( 'all_plugins', array( $this, 'hide_plugin' ) );
            add_action( 'admin_menu', array( $this, 'hide_menu' ), 999 );
        }

        $this->init_cron();
    }

    /**
     * Method hide_plugin()
     *
     * Remove the Google Pagespeed Insights plugin from the list of all plugins when the plugin is hidden.
     *
     * @param array $plugins Array containing all installed plugins.
     *
     * @return array $plugins Array containing all installed plugins without the Google Pagespeed Insights plugin.
     */
    public function hide_plugin( $plugins ) {
        foreach ( $plugins as $key => $value ) {
            $plugin_slug = basename( $key, '.php' );
            if ( 'google-pagespeed-insights' === $plugin_slug ) {
                unset( $plugins[ $key ] );
            }
        }

        return $plugins;
    }

    /**
     * Method hide_menu()
     *
     * Remove the Google Pagespeed Insights menu item when the plugin is hidden.
     */
    public function hide_menu() {

        /**
         * WordPress submenu array.
         *
         * @global object
         */
        global $submenu;

        if ( isset( $submenu['tools.php'] ) ) {
            foreach ( $submenu['tools.php'] as $key => $menu ) {
                if ( 'google-pagespeed-insights' === $menu[2] ) {
                    unset( $submenu['tools.php'][ $key ] );
                    break;
                }
            }
        }
    }

    /**
     * Method init_cron()
     *
     * Schedule daily Page Speed checks.
     */
    public function init_cron() {
        add_action( 'mainwp_child_pagespeed_cron_check', array( __CLASS__, 'pagespeed_cron_check' ) );
        $sched = wp_next_scheduled( 'mainwp_child_pagespeed_cron_check' );
        if ( false === $sched ) {
            wp_schedule_event( time(), 'daily', 'mainwp_child_pagespeed_cron_check' );
        }
    }

    /**
     * Method pagespeed_cron_check()
     *
     * Schedule single Page Speed check event.
     */
    public static function pagespeed_cron_check() {
        $count = get_option( 'mainwp_child_pagespeed_count_checking' );
        if ( $count >= 7 ) {
            $recheck = true;
            $count   = 0;
        } else {
            $recheck = false;
            ++$count;
        }
        update_option( 'mainwp_child_pagespeed_count_checking', $count );

        $worker_args = array(
            array(),
            false,
            $recheck,
        );
        wp_schedule_single_event( time(), 'googlepagespeedinsightschecknow', $worker_args );
    }

    /**
     * Method actions()
     *
     * Fire off certain Google Pagespeed Insights plugin actions.
     *
     * @uses \MainWP\Child\MainWP_Child_Pagespeed::save_settings() Save the plugin settings.
     * @uses \MainWP\Child\MainWP_Child_Pagespeed::set_showhide() Hide or unhide the Google Pagespeed Insights plugin.
     * @uses \MainWP\Child\MainWP_Child_Pagespeed::get_sync_data() Get the Google Pagespeed Insights plugin data and store it in the sync request.
     * @uses \MainWP\Child\MainWP_Child_Pagespeed::check_pages() Check pages page speed.
     * @uses \MainWP\Child\MainWP_Helper::write()
     */
    public function action() {
        $information = array();
        if ( ! defined( 'GPI_DIRECTORY' ) ) {
            $information['error'] = 'Please install Google Pagespeed Insights plugin on child website';
            MainWP_Helper::write( $information );
        }
        $mwp_action = MainWP_System::instance()->validate_params( 'mwp_action' );
        if ( ! empty( $mwp_action ) ) {
            switch ( $mwp_action ) {
                case 'save_settings':
                    $information = $this->save_settings();
                    break;
                case 'set_showhide':
                    $information = $this->set_showhide();
                    break;
                case 'sync_data':
                    $information = $this->get_sync_data();
                    break;
                case 'check_pages':
                    $information = $this->check_pages();
                    break;
            }
        }
        MainWP_Helper::write( $information );
    }

    /**
     * Method save_settings()
     *
     * Save the plugin settings.
     *
     * @uses MainWP_Child_Pagespeed::delete_data() Delete reports or all plugin data.
     *
     * @used-by MainWP_Child_Pagespeed::actions() Fire off certain Google Pagespeed Insights plugin actions.
     *
     * @return array Action result.
     */
	public function save_settings() { // phpcs:ignore -- Current complexity is the only way to achieve desired results, pull request solutions appreciated.
        $current_values = get_option( 'gpagespeedi_options' );
        $checkstatus    = apply_filters( 'gpi_check_status', false );
        if ( $checkstatus ) {
            return array( 'result' => 'RUNNING' );
        }
        $information = array();
		// phpcs:disable WordPress.Security.NonceVerification
        $settings = isset( $_POST['settings'] ) ? json_decode( base64_decode( wp_unslash( $_POST['settings'] ) ), true ) : array(); // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions,WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- base64_encode required for backwards compatibility.

        if ( is_array( $settings ) ) {

            if ( isset( $settings['api_key'] ) && ! empty( $settings['api_key'] ) ) {
                $current_values['google_developer_key'] = $settings['api_key'];
            }

            if ( isset( $settings['response_language'] ) ) {
                $current_values['response_language'] = $settings['response_language'];
            }

            $current_values['strategy'] = isset( $_POST['strategy'] ) ? sanitize_text_field( wp_unslash( $_POST['strategy'] ) ) : '';

            if ( isset( $settings['store_screenshots'] ) ) {
                $current_values['store_screenshots'] = $settings['store_screenshots'];
            }
            if ( isset( $settings['use_schedule'] ) ) {
                $current_values['use_schedule'] = $settings['use_schedule'];
            }

            if ( isset( $settings['max_execution_time'] ) ) {
                $current_values['max_execution_time'] = $settings['max_execution_time'];
            }

            if ( isset( $settings['max_run_time'] ) ) {
                $current_values['max_run_time'] = $settings['max_run_time'];
            }

            if ( isset( $settings['heartbeat'] ) ) {
                $current_values['heartbeat'] = $settings['heartbeat'];
            }

            if ( isset( $settings['delay_time'] ) ) {
                $current_values['sleep_time'] = $settings['delay_time'];
            }

            if ( isset( $settings['log_exception'] ) ) {
                $current_values['log_api_errors'] = ( $settings['log_exception'] ) ? true : false;
            }

            if ( isset( $settings['report_expiration'] ) ) {
                $current_values['recheck_interval'] = $settings['report_expiration'];
            }

            if ( isset( $settings['check_report'] ) ) {
                if ( is_array( $settings['check_report'] ) ) {
                    $current_values['check_pages']       = in_array( 'page', $settings['check_report'] ) ? true : false;
                    $current_values['check_posts']       = in_array( 'post', $settings['check_report'] ) ? true : false;
                    $current_values['check_categories']  = in_array( 'category', $settings['check_report'] ) ? true : false;
                    $current_values['check_custom_urls'] = in_array( 'custom_urls', $settings['check_report'] ) ? true : false;
                } else {
                    $current_values['check_pages']       = false;
                    $current_values['check_posts']       = false;
                    $current_values['check_categories']  = false;
                    $current_values['check_custom_urls'] = false;
                }
            }

            if ( isset( $settings['delete_data'] ) && ! empty( $settings['delete_data'] ) ) {
                $this->delete_data( $settings['delete_data'] );
            }

            if ( update_option( 'gpagespeedi_options', $current_values ) ) {
                $information['result'] = 'SUCCESS';
            } else {
                $information['result'] = 'NOTCHANGE';
            }
        }
		// phpcs:enable

        $strategy = $current_values['strategy'];

        $result = $this->get_sync_data( $strategy );

        $information['data'] = $result['data'];

        return $information;
    }

    /**
     * Method delete_data()
     *
     * Delete reports or all plugin data.
     *
     * @used-by MainWP_Child_Pagespeed::save_settings() Save the plugin settings.
     *
     * @param string $what Contains information about what to delete, just reports or everything.
     */
    public function delete_data( $what ) {

        /**
         * WordPress Database instance.
         *
         * @global object $wpdb
         */
        global $wpdb;

        $gpi_page_stats     = $wpdb->prefix . 'gpi_page_stats';
        $gpi_page_reports   = $wpdb->prefix . 'gpi_page_reports';
        $gpi_page_blacklist = $wpdb->prefix . 'gpi_page_blacklist';
		// phpcs:disable -- safe queries. Required to achieve desired results, pull request solutions appreciated.
		if ( 'purge_reports' === $what ) {
			$wpdb->query( "TRUNCATE TABLE $gpi_page_stats" );
			$wpdb->query( "TRUNCATE TABLE $gpi_page_reports" );
		} elseif ( 'purge_everything' === $what ) {
			$wpdb->query( "TRUNCATE TABLE $gpi_page_stats" );
			$wpdb->query( "TRUNCATE TABLE $gpi_page_reports" );
			$wpdb->query( "TRUNCATE TABLE $gpi_page_blacklist" );
		}
		// phpcs:enable
    }

    /**
     * Method set_showhide()
     *
     * Hide or unhide the Google Pagespeed Insights plugin.
     *
     * @return array Action result.
     *
     * @uses \MainWP\Child\MainWP_Helper::update_option()
     *
     * @used-by MainWP_Child_Pagespeed::actions() Fire off certain Google Pagespeed Insights plugin actions.
     */
    public function set_showhide() {
        $hide = MainWP_System::instance()->validate_params( 'showhide' );
        MainWP_Helper::update_option( 'mainwp_pagespeed_hide_plugin', $hide );
        $information['result'] = 'SUCCESS';

        return $information;
    }

    /**
     * Method check_pages()
     *
     * Initiate the check pages page speed.
     *
     * @uses MainWP_Child_Pagespeed::do_check_pages() If needed, force recheck proces, if not just check.
     *
     * @used-by MainWP_Child_Pagespeed::actions() Fire off certain Google Pagespeed Insights plugin actions.
     *
     * @return array Action result.
     */
    public function check_pages() {
		// phpcs:disable WordPress.Security.NonceVerification
        if ( isset( $_POST['force_recheck'] ) && ! empty( $_POST['force_recheck'] ) ) {
            $recheck = true;
        } else {
            $recheck = false;
        }
		// phpcs:enable
        $information = $this->do_check_pages( $recheck );
        if ( isset( $information['checked_pages'] ) && $information['checked_pages'] ) {
            $information['result'] = 'SUCCESS';
        }
        return $information;
    }

    /**
     * Method do_check_pages()
     *
     * Check or force re-check pages page speed.
     *
     * @param bool $forceRecheck If true, force recheck process, if false, just regular check.
     *
     * @return array Action result.
     */
    public function do_check_pages( $forceRecheck = false ) {
        $information = array();
        if ( defined( 'GPI_DIRECTORY' ) ) {
            $checkstatus = apply_filters( 'gpi_check_status', false );
            if ( $checkstatus ) {
                $information['error'] = esc_html__( 'The API is busy checking other pages, please try again later.', 'gpagespeedi' );
            } else {
                do_action( 'run_gpi', $forceRecheck );
                $information['checked_pages'] = 1;
            }
        }
        return $information;
    }

    /**
     * Method get_sync_data()
     *
     * Get the Google Pagespeed Insights plugin data and store it in the sync request.
     *
     * @param string $strategy Contains the selected strategy (desktop, mobile or both).
     *
     * @uses MainWP_Child_Pagespeed::cal_pagespeed_data() Calculate page speed scores.
     *
     * @used-by MainWP_Child_Pagespeed::actions() Fire off certain Google Pagespeed Insights plugin actions.
     *
     * @return array Action result.
     */
    public function get_sync_data( $strategy = '' ) {
        if ( empty( $strategy ) ) {
            $strategy = 'both';
        }

        $current_values = get_option( 'gpagespeedi_options' );
        $checkstatus    = apply_filters( 'gpi_check_status', false );
        if ( $checkstatus ) {
            return array( 'result' => 'RUNNING' );
        }

        $information = array();
        $bad_key     = ( $current_values['bad_api_key'] || empty( $current_values['google_developer_key'] ) );
        $data        = array( 'bad_api_key' => $bad_key );

        if ( 'both' === $strategy || 'desktop' === $strategy ) {
            $result = self::cal_pagespeed_data( 'desktop' );
            if ( ! empty( $result ) && is_array( $result ) ) {
                $data['desktop_score']         = $result['average_score'];
                $data['desktop_total_pages']   = $result['total_pages'];
                $data['desktop_last_modified'] = $result['last_modified'];
            }
        }
        if ( 'both' === $strategy || 'mobile' === $strategy ) {
            $result = self::cal_pagespeed_data( 'mobile' );
            if ( ! empty( $result ) && is_array( $result ) ) {
                $data['mobile_score']         = $result['average_score'];
                $data['mobile_total_pages']   = $result['total_pages'];
                $data['mobile_last_modified'] = $result['last_modified'];
            }
        }

        $information['data'] = $data;

        return $information;
    }

    /**
     * Method cal_pagespeed_data()
     *
     * Calculate page speed scores.
     *
     * @param string $strategy Contains the selected strategy (desktop, mobile or both).
     *
     * @used-by MainWP_Child_Pagespeed::get_sync_data() Get the Google Pagespeed Insights plugin data and store it in the sync request.
     *
     * @return array Array containing data including last modified timespamp, average score and number of pages.
     */
    public static function cal_pagespeed_data( $strategy ) {

        /**
         * WordPress Database instance.
         *
         * @global object $wpdb
         */
        global $wpdb;

        if ( ! defined( 'GPI_DIRECTORY' ) ) {
            return false;
        }

        if ( 'desktop' !== $strategy && 'mobile' !== $strategy ) {
            return false;
        }

        $score_column = $strategy . '_score';

        $data_typestocheck = self::get_filter_options( 'all' );

        $gpi_page_stats = $wpdb->prefix . 'gpi_page_stats';
        if ( ! empty( $data_typestocheck ) ) {

            $allpagedata = $wpdb->get_results( //phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery
                $wpdb->prepare(
					"SELECT ID, URL, $score_column FROM $gpi_page_stats WHERE ( $data_typestocheck[0] )", // phpcs:ignore -- safe query.
                    $data_typestocheck[1]
                ),
                ARRAY_A
            );
        } else {
            $allpagedata = array();
        }

        $reports_typestocheck = self::get_filter_options( 'all' );
        $gpi_page_reports     = $wpdb->prefix . 'gpi_page_reports';

        if ( ! empty( $reports_typestocheck ) ) {

            $allpagereports = $wpdb->get_results( //phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery
                $wpdb->prepare(
					"SELECT     r.rule_key, r.rule_name FROM $gpi_page_stats d INNER JOIN $gpi_page_reports r ON r.page_id = d.ID AND r.strategy = '$strategy' WHERE ( $reports_typestocheck[0] )", // phpcs:ignore -- safe query.
                    $reports_typestocheck[1]
                ),
                ARRAY_A
            );
        } else {
            $allpagereports = array();
        }

        $total_pages   = count( $allpagedata );
        $total_scores  = 0;
        $average_score = 0;

        if ( ! empty( $total_pages ) && ! empty( $allpagereports ) ) {

            foreach ( $allpagedata as $key => $pagedata ) {
                $total_scores = $total_scores + $pagedata[ $score_column ];
            }

            $average_score = number_format( $total_scores / $total_pages );
        }

        switch ( $strategy ) {
            case 'mobile':
                $nullcheck = 'mobile_score IS NOT NULL';
                $_select   = ' max(mobile_last_modified) as last_modified ';
                break;
            case 'desktop':
                $nullcheck = 'desktop_score IS NOT NULL';
                $_select   = ' max(desktop_last_modified) as last_modified ';
                break;
        }

        if ( ! is_null( $reports_typestocheck ) ) {
            $gpi_page_stats = $wpdb->prefix . 'gpi_page_stats';
			$data           = $wpdb->get_results( $wpdb->prepare( "SELECT $_select FROM $gpi_page_stats WHERE ( $reports_typestocheck[0] ) AND $nullcheck", $reports_typestocheck[1] ), ARRAY_A ); // phpcs:ignore -- safe query.
        }

        return array(
            'last_modified' => is_array( $data[0] ) && isset( $data[0]['last_modified'] ) ? $data[0]['last_modified'] : 0,
            'average_score' => $average_score,
            'total_pages'   => $total_pages,
        );
    }

    /**
     * Method get_filter_options()
     *
     * @param  string $restrict_type Contains the restricted types.
     *
     * @return array Array containing the list of item types to check (posts, pages, categories,...).
     */
	public static function get_filter_options( $restrict_type = 'all' ) { // phpcs:ignore -- Current complexity is the only way to achieve desired results, pull request solutions appreciated.

        $types        = array();
        $gpi_options  = get_option( 'gpagespeedi_options' );
        $typestocheck = array();

        if ( $gpi_options['check_pages'] && ( 'all' === $restrict_type || 'ignored' === $restrict_type || 'pages' === $restrict_type ) ) {
            $typestocheck[] = 'type = %s';
            $types[1][]     = 'page';
        }

        if ( $gpi_options['check_posts'] && ( 'all' === $restrict_type || 'ignored' === $restrict_type || 'posts' === $restrict_type ) ) {
            $typestocheck[] = 'type = %s';
            $types[1][]     = 'post';
        }

        if ( $gpi_options['check_categories'] && ( 'all' === $restrict_type || 'ignored' === $restrict_type || 'categories' === $restrict_type ) ) {
                $typestocheck[] = 'type = %s';
                $types[1][]     = 'category';
        }

        if ( $gpi_options['cpt_whitelist'] && ( 'all' === $restrict_type || 'ignored' === $restrict_type || stristr( $restrict_type, 'gpi_custom_posts' ) ) ) {
            $cpt_whitelist_arr = false;
            if ( ! empty( $gpi_options['cpt_whitelist'] ) ) {
                $cpt_whitelist_arr = unserialize( $gpi_options['cpt_whitelist'] ); // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions -- unserialize usage required to achieve desired results, pull request solutions appreciated.
            }
            $args              = array(
                'public'   => true,
                '_builtin' => false,
            );
            $custom_post_types = get_post_types( $args, 'names', 'and' );
            if ( 'gpi_custom_posts' !== $restrict_type && 'all' !== $restrict_type && 'ignored' !== $restrict_type ) {
                $restrict_type = str_replace( 'gpi_custom_posts-', '', $restrict_type );
                foreach ( $custom_post_types as $post_type ) {
                    if ( $cpt_whitelist_arr && in_array( $post_type, $cpt_whitelist_arr ) && $post_type === $restrict_type ) {
                        $typestocheck[] = 'type = %s';
                        $types[1][]     = $custom_post_types[ $post_type ];
                    }
                }
            } else {
                foreach ( $custom_post_types as $post_type ) {
                    if ( $cpt_whitelist_arr && in_array( $post_type, $cpt_whitelist_arr ) ) {
                        $typestocheck[] = 'type = %s';
                        $types[1][]     = $custom_post_types[ $post_type ];
                    }
                }
            }
        }

        if ( $gpi_options['check_custom_urls'] ) {

            /**
             * WordPress Database instance.
             *
             * @global object $wpdb
             */
            global $wpdb;

            $custom_url_types = $wpdb->get_col( 'SELECT DISTINCT type FROM ' . $wpdb->prefix . 'gpi_custom_urls ' ); //phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery
            if ( ! empty( $custom_url_types ) ) {
                foreach ( $custom_url_types as $custom_url_type ) {
                    $typestocheck[] = 'type = %s';
                    $types[1][]     = $custom_url_type;
                }
            }
        }

        if ( ! empty( $typestocheck ) ) {
            $types[0] = '';
            foreach ( $typestocheck as $type ) {
                if ( ! is_array( $type ) ) {
                    $types[0] .= $type . ' OR ';
                } else {
                    foreach ( $type as $custom_post_type ) {
                        $types[0]  .= 'type = %s OR ';
                        $types[1][] = $custom_post_type;
                    }
                }
            }
            $types[0] = rtrim( $types[0], ' OR ' );
            return $types;
        }
        return null;
    }
}
