JezK

Edit File: upgrade-to-pro.php

<?php
if ( ! defined( 'ABSPATH' ) ) exit;

/**
 * Allows plugins to use their own update API.
 *
 * @author Easy Digital Downloads
 * @version 1.7
 */
if ( !class_exists('rsp_upgrade_to_pro') ){
    class rsp_upgrade_to_pro {
        private $version = 2;
        private $api_url = "";
        private $license = "";
        private $item_id = "";
        private $slug = "";
        private $health_check_timeout = 5;
        private $plugin_name = "";
        private $plugin_constant = "";
        private $steps;
        private $prefix;
        private $dashboard_url;
        private $instructions;
        private $account_url;

// The plugins we only support upgrading to PRO for.
        private $knownPlugins = [
            'rsssl_pro',
            'cmplz_pro',
        ];

/**
         * Class constructor.
         */
        public function __construct()
        {
            if (!isset($_GET['license'], $_GET['item_id'], $_GET['plugin']) || (isset($_GET['install_pro']) && $_GET['install_pro'] !== 'true')) {
                return;
            }

if (!in_array($_GET['plugin'], $this->knownPlugins)) {
                return;
            }

$this->license = sanitize_title($_GET['license']);
            $this->item_id = sanitize_title($_GET['item_id']);

$plugin = sanitize_title($_GET['plugin']);
            switch ($plugin) {
                case "rsssl_pro":
                    $rsssl_admin_url = is_multisite() ? network_admin_url('settings.php') : admin_url("options-general.php");
                    $this->slug = is_multisite() ? "really-simple-ssl-pro-multisite/really-simple-ssl-pro-multisite.php" :  "really-simple-ssl-pro/really-simple-ssl-pro.php";
                    $this->plugin_name = "Really Simple Security Pro";
                    $this->plugin_constant = "rsssl_pro";
                    $this->prefix = "rsssl_";
                    $this->api_url = "https://really-simple-ssl.com";
                    $this->dashboard_url = add_query_arg(["page" => "really-simple-security"], $rsssl_admin_url );
                    $this->account_url = 'https://really-simple-ssl.com/account';
                    $this->instructions = 'https://really-simple-ssl.com/knowledge-base/install-really-simple-ssl-pro';
                    break;
                case "cmplz_pro":
                default:
                    $this->slug = is_multisite() ? "complianz-gdpr-premium-multisite/complianz-gpdr-premium.php" : "complianz-gdpr-premium/complianz-gpdr-premium.php";
                    $this->plugin_name = "Complianz";
                    $this->plugin_constant = "cmplz_premium";
                    $this->prefix = "cmplz_";
                    $this->api_url = "https://complianz.io";
                    $this->dashboard_url = add_query_arg(["page" => "complianz"], admin_url("admin.php") );
                    $this->account_url = 'https://complianz.io/account';
                    $this->instructions = 'https://complianz.io/how-to-install-complianz-gdpr-premium-plugin';
                    break;
            }

$this->steps = array(
                array(
                    'action' => 'rsp_upgrade_destination_clear',
                    'doing' => esc_html__( 'Checking if plugin folder exists...', 'really-simple-ssl' ),
                    'success' => esc_html__( 'Able to create destination folder', 'really-simple-ssl' ),
                    'error' => esc_html__( 'Destination folder already exists', 'really-simple-ssl' ),
                    'type' => 'folder',
                ),
                array(
                    'action' => 'rsp_upgrade_activate_license',
                    'doing' => esc_html__( 'Validating license...', 'really-simple-ssl' ),
                    'success' => esc_html__( 'License valid', 'really-simple-ssl' ),
                    'error' => esc_html__( 'License invalid', 'really-simple-ssl' ),
                    'type' => 'license',
                ),
                array(
                    'action' => 'rsp_upgrade_install_plugin',
                    'doing' => esc_html__( 'Installing plugin...', 'really-simple-ssl' ),
                    'success' => esc_html__( 'Plugin installed', 'really-simple-ssl' ),
                    'error' => esc_html__( 'Failed to install plugin', 'really-simple-ssl' ),
                    'type' => 'install',
                ),
                array(
                    'action' => 'rsp_upgrade_activate_plugin',
                    'doing' => esc_html__( 'Activating plugin...', 'really-simple-ssl' ),
                    'success' => esc_html__( 'Plugin activated', 'really-simple-ssl' ),
                    'error' => esc_html__( 'Failed to activate plugin', 'really-simple-ssl' ),
                    'type' => 'activate',
                )
            );

// Set up hooks.
            $this->init();
        }

private function get_suggested_plugin($attr){
            $plugin_to_be_installed = '';
            if (isset($_GET['plugin']) && $_GET['plugin']==='cmplz_pro' ) {
                $plugin_to_be_installed = 'complianz-gdpr';
            } else if (isset($_GET['plugin']) && $_GET['plugin']==='rsssl_pro' ) {
                $plugin_to_be_installed = 'really-simple-ssl';
            }

$dir_url = plugin_dir_url(__FILE__).'img/';

$suggestion = [
                'icon_url' => $dir_url.'complianz-gdpr.png',
                'constant' => 'cmplz_version',
                'title' => 'Complianz GDPR/CCPA',
                'description_short' => __('GDPR/CCPA Privacy Suite', "really-simple-ssl"),
                'disabled' => '',
                'button_text' => __("Install", "really-simple-ssl"),
                'slug' => 'complianz-gdpr',
                'description' => __('Configure your Cookie Notice, Consent Management and Cookie Policy with our Wizard and Cookie Scan. Supports GDPR, DSGVO, TTDSG, LGPD, POPIA, RGPD, CCPA and PIPEDA.', "really-simple-ssl"),
                'install_url' => 'complianz+gdpr+POPIA&tab=search&type=term',
            ];

if ( $plugin_to_be_installed === 'complianz-gdpr' ){
                $suggestion = [
                    'icon_url' => $dir_url.'really-simple-ssl.png',
                    'constant' => 'rsssl_version',
                    'title' => 'Really Simple Security',
                    'description_short' => __('One click SSL optimization', "really-simple-ssl"),
                    'disabled' => '',
                    'button_text' => __("Install", "really-simple-ssl"),
                    'slug' => 'really-simple-ssl',
                    'description' => __('Easily improve site security with WordPress Hardening, Two-Factor Authentication (2FA), Login Protection, Vulnerability Detection and SSL certificate generation.', "really-simple-ssl"),
                    'install_url' => 'ssl%20really%20simple%20plugins%20complianz+HSTS&tab=search&type=term',
                ];
            }

$admin_url = is_multisite() ? network_admin_url('plugin-install.php?s=') : admin_url('plugin-install.php?s=');
            $suggestion['install_url'] = $admin_url.$suggestion['install_url'];
            if (defined($suggestion['constant'])){
                $suggestion['install_url'] = '#';
                $suggestion['button_text'] = __("Installed", "really-simple-ssl");
                $suggestion['disabled'] = 'disabled';
            }

return $suggestion[$attr];
        }

/**
         * Set up WordPress filters to hook into WP's update process.
         *
         * @uses add_filter()
         *
         * @return void
         */
        public function init() {
            add_action( 'admin_footer', array( $this, 'print_install_modal' ) );
            add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_assets') );
            add_action( 'wp_ajax_rsp_upgrade_destination_clear', array($this, 'process_ajax_destination_clear') );
            add_action( 'wp_ajax_rsp_upgrade_activate_license', array($this, 'process_ajax_activate_license') );
            add_action( 'wp_ajax_rsp_upgrade_install_plugin', array($this, 'process_ajax_install_plugin') );
            add_action( 'wp_ajax_rsp_upgrade_activate_plugin', array($this, 'process_ajax_activate_plugin') );
        }

/**
         * Enqueue javascript
         * @todo minification
         */
        public function enqueue_assets( $hook ) {
            if ( $hook === "plugins.php" && isset($_GET['install_pro']) ) {
                $minified = ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '' : '.min';
                wp_register_style( 'rsp-upgrade-css', plugin_dir_url(__FILE__) . "upgrade-to-pro$minified.css", false, $this->version );
                wp_enqueue_style( 'rsp-upgrade-css' );
                wp_enqueue_script( 'rsp-ajax-js', plugin_dir_url(__FILE__) . "ajax$minified.js", array(), $this->version, true );
                wp_enqueue_script( 'rsp-upgrade-js', plugin_dir_url(__FILE__) . "upgrade-to-pro$minified.js", array(), $this->version, true );
                wp_localize_script(
                    'rsp-upgrade-js',
                    'rsp_upgrade',
                    array(
                        'steps' => $this->steps,
                        'admin_url' => admin_url( 'admin-ajax.php' ),
                        'token'     => wp_create_nonce( 'upgrade_to_pro_nonce'),
                        'cmplz_nonce'     => wp_create_nonce( 'complianz_save'),
                        'finished_title' => __("Installation finished", "really-simple-ssl"),
                    )
                );
            }
        }

/**
         * Calls the API and, if successfull, returns the object delivered by the API.
         *
         * @uses get_bloginfo()
         * @uses wp_remote_post()
         * @uses is_wp_error()
         *
         * @return false|object
         */
        private function api_request() {
            if ( !rsssl_user_can_manage() ) {
                return false;
            }
            global $edd_plugin_url_available;

// Do a quick status check on this domain if we haven't already checked it.
            $store_hash = md5( $this->api_url );
            if ( ! is_array( $edd_plugin_url_available ) || ! isset( $edd_plugin_url_available[ $store_hash ] ) ) {
                $test_url_parts = parse_url( $this->api_url );
                $port   = ! empty( $test_url_parts['port'] ) ? ':' . $test_url_parts['port'] : '';
                $host   = ! empty( $test_url_parts['host'] ) ? $test_url_parts['host'] : '';
                $test_url = 'https://' . $host . $port;
                $response = wp_remote_get( $test_url, array( 'timeout' => $this->health_check_timeout, 'sslverify' => true ) );
                $edd_plugin_url_available[ $store_hash ] = is_wp_error( $response ) ? false : true;
            }

if ( false === $edd_plugin_url_available[ $store_hash ] ) {
                return false;
            }

if( $this->api_url == trailingslashit ( home_url() ) ) {
                return false; // Don't allow a plugin to ping itself
            }

$api_params = array(
                'edd_action' => 'get_version',
                'license'    => ! empty( $this->license ) ? $this->license : '',
                'item_id'    => isset( $this->item_id ) ? $this->item_id : false,
                'url'        => home_url(),
            );
            $request    = wp_remote_post( $this->api_url, array( 'timeout' => 15, 'sslverify' => true, 'body' => $api_params ) );
            if ( ! is_wp_error( $request ) ) {
                $request = json_decode( wp_remote_retrieve_body( $request ) );
            }

if ( $request && isset( $request->sections ) ) {
                // Use json_decode instead of maybe_unserialize to prevent PHP object injection
                $request->sections = is_string( $request->sections ) ? json_decode( $request->sections, true ) : $request->sections;
            } else {
                $request = false;
            }

if ( $request && isset( $request->banners ) ) {
                // Use json_decode instead of maybe_unserialize to prevent PHP object injection
                $request->banners = is_string( $request->banners ) ? json_decode( $request->banners, true ) : $request->banners;
            }

if ( $request && isset( $request->icons ) ) {
                // Use json_decode instead of maybe_unserialize to prevent PHP object injection
                $request->icons = is_string( $request->icons ) ? json_decode( $request->icons, true ) : $request->icons;
            }

if( ! empty( $request->sections ) ) {
                foreach( $request->sections as $key => $section ) {
                    $request->$key = (array) $section;
                }
            }

return $request;
        }

/**
         * Prints a modal with bullets for each step of the install process
         */
        public function print_install_modal()
        {
            if ( !rsssl_user_can_manage() ) {
                return false;
            }

if ( is_admin() && isset($_GET['install_pro']) && isset($_GET['license']) && isset($_GET['item_id']) && isset($_GET['plugin']) ) {
                $dashboard_url = $this->dashboard_url;
                $plugins_url = admin_url( "plugins.php" );
                ?>
                <div id="rsp-step-template">
                    <div class="rsp-install-step {step}">
                        <div class="rsp-step-color">
                            <div class="rsp-grey rsp-bullet"></div>
                        </div>
                        <div class="rsp-step-text">
                            <span>{doing}</span>
                        </div>
                    </div>
                </div>
                <div id="rsp-plugin-suggestion-template">
                    <div class="rsp-recommended"><?php _e("Recommended by Really Simple Plugins","really-simple-ssl")?></div>
                    <div class="rsp-plugin-suggestion">
                        <div class="rsp-icon"><img alt="suggested plugin icon" src="<?=$this->get_suggested_plugin('icon_url')?>"></div>
                        <div class="rsp-summary">
                            <div class="rsp-title"><?=$this->get_suggested_plugin('title')?></div>
                            <div class="rsp-description_short"><?=$this->get_suggested_plugin('description_short')?></div>
                            <div class="rsp-rating"><?php
                                $plugin_info = $this->get_plugin_info($this->get_suggested_plugin('slug'));

if (!is_wp_error($plugin_info) && !empty($plugin_info->rating)) {
                                    wp_star_rating([
                                            'rating' => $plugin_info->rating,
                                            'type' => 'percent',
                                            'number' => $plugin_info->num_ratings
                                        ]
                                    );
                                }
                                ?></div>
                        </div>
                        <div class="rsp-description"><?=$this->get_suggested_plugin('description')?></div>
                        <div class="rsp-install-button"><a class="button-secondary" <?=$this->get_suggested_plugin('disabled')?> href="<?=$this->get_suggested_plugin('install_url')?>"><?=$this->get_suggested_plugin('button_text')?></a></div>
                    </div>
                </div>
                <div class="rsp-modal-transparent-background">
                    <div class="rsp-install-plugin-modal">
                        <h3><?php echo __("Installing", "really-simple-ssl") . " " . $this->plugin_name ?></h3>
                        <div class="rsp-progress-bar-container">
                            <div class="rsp-progress rsp-grey">
                                <div class="rsp-bar rsp-green" style="width:0%"></div>
                            </div>
                        </div>
                        <div class="rsp-install-steps">

</div>
                        <div class="rsp-footer">
                            <a href="<?php echo $dashboard_url ?>" role="button" class="button-primary rsp-yellow rsp-hidden rsp-btn rsp-visit-dashboard">
                                <?php echo __("Visit Dashboard", "really-simple-ssl") ?>
                            </a>
                            <a href="<?php echo $plugins_url ?>" role="button" class="button-primary rsp-red rsp-hidden rsp-btn rsp-cancel">
                                <?php echo __("Cancel", "really-simple-ssl") ?>
                            </a>
                            <div class="rsp-error-message rsp-folder rsp-package rsp-install rsp-activate rsp-hidden"><span><?php _e('An error occurred:',"really-simple-ssl")?></span>&nbsp;<?php printf(__('Install %sManually%s.',"really-simple-ssl").'&nbsp;', '<a target="_blank" rel="noopener noreferrer" href="'.$this->account_url.'">','</a>')?></div>
                            <div class="rsp-error-message rsp-license rsp-hidden"><span><?php _e('An error occurred:',"really-simple-ssl")?></span>&nbsp;<?php printf(__('Check your %slicense%s.',"really-simple-ssl").'&nbsp;', '<a target="_blank" rel="noopener noreferrer" href="'.$this->instructions.'">','</a>')?></div>
                        </div>
                    </div>
                </div>
                <?php
            }
        }

/**
         * Retrieve plugin info for rating use
         *
         * @uses plugins_api() Get the plugin data
         *
         * @param  string $slug The WP.org directory repo slug of the plugin
         *
         * @version 1.0
         */
        private function get_plugin_info($slug = '')
        {
            require_once ABSPATH . 'wp-admin/includes/plugin-install.php';
            $plugin_info = get_transient('rsp_'.$slug . '_plugin_info');
            if ( empty($plugin_info) ) {
                $plugin_info = plugins_api('plugin_information', array('slug' => $slug));
                if (!is_wp_error($plugin_info)) {
                    set_transient('rsp_'.$slug . '_plugin_info', $plugin_info, WEEK_IN_SECONDS);
                }
            }
            return $plugin_info;
        }

/**
         * Ajax GET request
         *
         * Checks if the destination folder already exists
         *
         * Requires from GET:
         * - 'token' => wp_nonce 'upgrade_to_pro_nonce'
         * - 'plugin' (This will set $this->slug (Ex. 'really-simple-ssl-pro/really-simple-ssl-pro.php'), based on which plugin)
         *
         * Sends a WordPress JSON response. On failure, the data field contains
         * an escaped error message when available.
         */
        public function process_ajax_destination_clear()
        {
            $error = false;
            $response = [
                'success' => false,
                'message' => '',
            ];

if ( !rsssl_user_can_manage() ) {
                $error = true;
            }

if ( !isset($_GET['token']) || !wp_verify_nonce($_GET['token'], 'upgrade_to_pro_nonce')) {
                $error = true;
            }

if ( ! current_user_can( 'activate_plugins' ) || ! current_user_can( 'install_plugins' ) ) {
                $error = true;
            }

if (empty($this->slug)) {
                $error = true;
                $response['message'] = __('Unknown plugin encountered.', 'really-simple-ssl');
            }

if (!$error) {
                if ( defined( $this->plugin_constant ) ) {
                    deactivate_plugins( $this->slug );
                }

$file = trailingslashit( WP_CONTENT_DIR ) . 'plugins/' . $this->slug;
                if ( file_exists( $file ) ) {
                    $dir     = dirname( $file );
                    $new_dir = $dir . '_' . time();
                    set_transient( 'rsssl_upgrade_dir', $new_dir, WEEK_IN_SECONDS );
                    rename( $dir, $new_dir );
                    //prevent uninstalling code by previous plugin
                    unlink( trailingslashit( $new_dir ) . 'uninstall.php' );
                }
            }

if ( !$error && file_exists($file ) ) {
                $error = true;
                $response['message'] = __("Could not rename folder!", "really-simple-ssl");
            }

if ( !$error && isset($_GET['plugin']) ) {
                if ( !file_exists(WP_PLUGIN_DIR . '/' . $this->slug) ) {
                    $response['success'] = true;
                }
            }

if ( $response['success'] ) {
                wp_send_json_success();
            }

wp_send_json_error( esc_html( $response['message'] ) );
        }

/**
         * Ajax GET request
         *
         * Links the license on the website to this site
         *
         * Requires from GET:
         * - 'token' => wp_nonce 'upgrade_to_pro_nonce'
         * - 'license'
         * - 'item_id'
         *
         * (Without this link you cannot download the pro package from the website)
         *
         * Sends a WordPress JSON response. On failure, the data field contains
         * an escaped error message when available.
         */
        public function process_ajax_activate_license()
        {
            $error = false;
            $response = [
                'success' => false,
                'message' => '',
            ];

if ( !rsssl_user_can_manage() ) {
                $error = true;
            }

if (!$error && isset($_GET['token']) && wp_verify_nonce($_GET['token'], 'upgrade_to_pro_nonce') && isset($_GET['license']) && isset($_GET['item_id']) ) {
                $license  = sanitize_title($_GET['license']);
                $item_id = (int) $_GET['item_id'];
                $response = $this->validate($license, $item_id);
                update_site_option($this->prefix.'auto_installed_license', $license);
            }

if ( $response['success'] ) {
                wp_send_json_success();
            }

wp_send_json_error( esc_html( $response['message'] ) );
        }

/**
         * Activate the license on the websites url at EDD
         *
         * Stores values in database:
         * - {$this->pro_prefix}license_activations_left
         * - {$this->pro_prefix}license_expires
         * - {$this->pro_prefix}license_activation_limit
         *
         * @param $license
         * @param $item_id
         *
         * @return array [license status, response message]
         */

private function validate( $license, $item_id ): array {
            $message = "";
            $success = false;

if ( !rsssl_user_can_manage() ) {
                return [
                    'success' => $success,
                    'message' => $message,
                ];
            }

// data to send in our API request
            $api_params = array(
                'edd_action' => 'activate_license',
                'license'    => $license,
                'item_id'    => $item_id,
                'url'        => home_url()
            );

// Call the custom API.
            $response = wp_remote_post( $this->api_url, array( 'timeout' => 15, 'sslverify' => false, 'body' => $api_params ) );

// make sure the response came back okay
            if ( is_wp_error( $response ) || 200 !== wp_remote_retrieve_response_code( $response ) ) {
                if ( is_wp_error( $response ) ) {
                    $message = $response->get_error_message();
                } else {
                    $message = __( 'An error occurred, please try again.', "really-simple-ssl");
                }
            } else {
                $license_data = json_decode( wp_remote_retrieve_body( $response ) );
                if ( false === $license_data->success ) {
                    switch( $license_data->error ) {
                        case 'expired' :
                            $message = sprintf(
                                __( 'Your license key expired on %s.', "really-simple-ssl"),
                                date_i18n( get_option( 'date_format' ), strtotime( $license_data->expires, current_time( 'timestamp' ) ) )
                            );
                            break;
                        case 'disabled' :
                        case 'revoked' :
                            $message = __( 'Your license key has been disabled.', "really-simple-ssl");
                            break;
                        case 'missing' :
                            $message = __('Missing license.', "really-simple-ssl");
                            break;
                        case 'invalid' :
                            $message = __( 'Invalid license.', "really-simple-ssl");
                            break;
                        case 'site_inactive' :
                            $message = __( 'Your license is not active for this URL.', "really-simple-ssl" );
                            break;
                        case 'item_name_mismatch' :
                            $message = __( 'This appears to be an invalid license key for this plugin.', "really-simple-ssl" );
                            break;
                        case 'no_activations_left':
                            $message = __( 'Your license key has reached its activation limit.', "really-simple-ssl");
                            break;
                        default :
                            $message = __( 'An error occurred, please try again.', "really-simple-ssl" );
                            break;
                    }
                    //in case of failure, rename back to default
                    $new_dir = get_transient('rsssl_upgrade_dir');
                    if ( $new_dir ) {
                        if ( file_exists($new_dir ) ) {
                            $default_file = trailingslashit(WP_CONTENT_DIR).'plugins/'.$this->slug;
                            $default_dir = dirname($default_file);
                            rename($new_dir, $default_dir);
                        }
                    }

} else {
                    $success = $license_data->license === 'valid';
                }
            }

return [
                'success' => $success,
                'message' => $message,
            ];
        }

/**
         * Download and install the plugin using package information retrieved
         * server-side from the license API.
         *
         * Requires from GET:
         * - 'token' => wp_nonce 'upgrade_to_pro_nonce'
         *
         * Sends a JSON response containing the success state and, on failure,
         * an error message.
         */
        public function process_ajax_install_plugin()
        {
            $message = '';

if ( ! rsssl_user_can_manage() || ! current_user_can( 'install_plugins' ) ) {
                wp_send_json_error(
                    esc_html__( 'Insufficient permissions to install plugins.', 'really-simple-ssl' )
                );
            }

$token = isset( $_GET['token'] ) ? sanitize_text_field( wp_unslash( $_GET['token'] ) ) : '';
            if ( ! wp_verify_nonce( $token, 'upgrade_to_pro_nonce' ) ) {
                wp_send_json_error(
                    esc_html__( 'Security check failed. Please refresh the page and try again.', 'really-simple-ssl' )
                );
            }

$api           = $this->api_request();
            $download_link = '';
            if ( $api && ! empty( $api->download_link ) && is_string( $api->download_link ) ) {
                $download_link = esc_url_raw( $api->download_link );
            }
            if ( empty( $download_link ) ) {
                wp_send_json_error(
                    esc_html__( 'Failed to retrieve download link from license server.', 'really-simple-ssl' )
                );
            }

require_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';
            include_once ABSPATH . 'wp-admin/includes/plugin-install.php';

$skin     = new WP_Ajax_Upgrader_Skin();
            $upgrader = new Plugin_Upgrader( $skin );
            $result   = $upgrader->install( $download_link );

if ( $result ) {
                wp_send_json_success();
            }

if ( is_wp_error( $result ) ) {
                $message = $result->get_error_message();
            }

wp_send_json_error( esc_html( $message ) );
        }

/**
         * Ajax GET request
         *
         * Do an API request to get the download link where to download the pro package
         *
         * Requires from GET:
         * - 'token' => wp_nonce 'upgrade_to_pro_nonce'
         * - 'plugin' (This will set $this->slug (Ex. 'really-simple-ssl-pro/really-simple-ssl-pro.php'), based on which plugin)
         *
         * Sends a WordPress JSON response containing the success state.
         */
        public function process_ajax_activate_plugin()
        {
            if ( ! rsssl_user_can_manage() || ! current_user_can( 'activate_plugins' ) ) {
                wp_send_json_error();
            }

if (
                ! isset( $_GET['token'] )
                || ! wp_verify_nonce( $_GET['token'], 'upgrade_to_pro_nonce' )
                || ! isset( $_GET['plugin'] )
            ) {
                wp_send_json_error();
            }

$networkwide = is_multisite() && rsssl_is_networkwide_active();
            $result = activate_plugin( $this->slug, '', $networkwide );
            if ( is_wp_error( $result ) ) {
                wp_send_json_error();
            }

wp_send_json_success();
        }
    }
    $rsp_upgrade_to_pro = new rsp_upgrade_to_pro();
}