<?php

defined('ABSPATH') or die("you do not have access to this page!");

if (!class_exists('rsssl_multisite')) {
    class rsssl_multisite
    {
        private static $_this;

        public $section = "rsssl_network_options_section";
        public $ssl_enabled_networkwide;
        public $selected_networkwide_or_per_site;
        public $wp_redirect;
        public $htaccess_redirect;
        public $do_not_edit_htaccess;
        public $autoreplace_mixed_content;
        public $javascript_redirect;
        public $hsts;
        public $mixed_content_admin;
        public $cert_expiration_warning;
        public $hide_menu_for_subsites;
        public $dismiss_all_notices;

        function __construct()
        {

            if (isset(self::$_this))
                wp_die(sprintf(__('%s is a singleton class and you cannot create a second instance.', 'really-simple-ssl'), get_class($this)));

            self::$_this = $this;

            $this->load_options();
            register_activation_hook(dirname(__FILE__) . "/" . rsssl_plugin, array($this, 'activate'));

            /*filters to make sure WordPress returns the correct protocol */
            add_filter("admin_url", array($this, "check_admin_protocol"), 20, 3);
            add_filter('home_url', array($this, 'check_site_protocol'), 20, 4);
            add_filter('site_url', array($this, 'check_site_protocol'), 20, 4);
            add_action("plugins_loaded", array($this, "process_networkwide_choice"), 10, 0);
            add_action("plugins_loaded", array($this, "networkwide_choice_notice"), 20, 0);
            add_action('network_admin_menu', array(&$this, 'add_multisite_menu'));
            add_action('network_admin_edit_rsssl_update_network_settings', array($this, 'update_network_options'));

            if (is_network_admin()) {
                add_action('network_admin_notices', array($this, 'show_notices'), 10);
                add_action('admin_print_footer_scripts', array($this, 'insert_dismiss_success'));
                add_action('admin_print_footer_scripts', array($this, 'insert_dismiss_wildcard_warning'));
            }

            $plugin = rsssl_plugin;
	        add_filter("network_admin_plugin_action_links_$plugin", array($this, 'plugin_settings_link'));
            add_action('wp_ajax_dismiss_success_message_multisite', array($this, 'dismiss_success_message_callback'));
            add_action('wp_ajax_dismiss_wildcard_warning', array($this, 'dismiss_wildcard_message_callback'));

            //If WP version is 5.1 or higher, use wp_insert_site hook for multisite SSL activation in new blogs
            if(version_compare(get_bloginfo('version'),'5.1', '>=') ) {
                add_action('wp_initialize_site', array($this, 'maybe_activate_ssl_in_new_blog'), 20, 1);
            } else {
                add_action('wpmu_new_blog', array($this, 'maybe_activate_ssl_in_new_blog_deprecated'), 10, 6);
            }

            //Listen for run_ssl_process hook switch
            add_action('admin_init', array($this, 'listen_for_ssl_conversion_hook_switch'), 40);
	        add_filter('rsssl_notices', array($this, 'add_multisite_notices'));
	        add_filter('rsssl_ssl_detected', array($this, 'override_ssl_detection_ms'));
	        add_action('rsssl_progress_feedback', array( $this, 'add_ms_progress_feedback' ));
        }

        static function this()
        {
            return self::$_this;
        }

	    /**
         * Conditionally override SSL detection
         *
	     * @param $output
	     *
	     * @return string
	     */
        public function override_ssl_detection_ms( $output ){
            //if it's multisite, and it's activated per site, this is not important for the main site.
        	if ( is_multisite() && is_main_site() && $this->selected_networkwide_or_per_site && !$this->ssl_enabled_networkwide ) {
        		return 'not-applicable';
	        }

        	return $output;
        }

        public function add_ms_progress_feedback(){
            if ( !is_multisite() ) return;
            if ( !is_network_admin() ) return;

	        if ( !$this->selected_networkwide_or_per_site ) {
		        echo ' '.__('No choice has been made regarding networkwide or per site activation.', 'really-simple-ssl');
	        } else if ($this->ssl_enabled_networkwide){
		        echo ' '.__('SSL is activated network wide.', 'really-simple-ssl');
	        } else {
		        echo ' '.__('SSL is activated per site.', 'really-simple-ssl');
	        }
        }

        public function add_multisite_notices($notices) {

        	//only on network
	        if ( !is_network_admin()) return $notices;

            $unset_array = array(
                'mixed_content_fixer_detected',
                'hsts_enabled',
                'mixed_content_scan',
                'elementor',
                'divi',
                'wordpress_redirect',
            );

            foreach ( $unset_array as $unset_item ) {
                unset( $notices[$unset_item] );
            }

	        $notices['ssl_enabled'] = array(
		        'callback' => 'RSSSL()->rsssl_multisite->ssl_activation_status',
		        'score' => 30,
		        'output' => array(
			        'ssl-networkwide' => array(
				        'msg' =>__('SSL is enabled networkwide.', 'really-simple-ssl'),
				        'icon' => 'success'
			        ),
			        'ssl-per-site' => array(
				        'msg' =>__('SSL is enabled per site.', 'really-simple-ssl'),
				        'icon' => 'success'
			        ),
			        'ssl-not-enabled' => array(
				        'msg' => __('SSL is not enabled yet', 'really-simple-ssl'),
				        'icon' => 'open',
			        ),
		        ),
	        );
	        $notices['6_multisite_networkwide'] = array(
		        'callback' => 'RSSSL()->rsssl_multisite->ssl_activation_status',
		        'score'     => 0,
		        'output'    => array(
			        'ssl-per-site' => array(
                        'title'       => __( "End of Per Site Management support.", "really-simple-ssl"  ),
				        'msg'         => __( "Really Simple SSL 6.0 drops SSL activation per website. Upgrading to 6.0 will upgrade all subsites to SSL.", "really-simple-ssl" ),
				        'icon'        => 'warning',
				        'url'         => 'https://really-simple-ssl.com/ssl-per-website-deprecated/',
				        'dismissible' => true,
				        'plusone' => true,
				        'admin_notice' => true,
			        ),
		        ),
	        );


	        $notices['multisite_server_variable_warning'] = array(
		        'callback' => 'RSSSL()->rsssl_multisite->multisite_server_variable_warning',
		        'score' => 30,
		        'output' => array(
			        'no-server-variable' => array(
				        'msg' => __('You run a Multisite installation with subfolders, which prevents this plugin from fixing your missing server variable in the wp-config.php.', 'really-simple-ssl') . " "
                                .__('Because the $_SERVER["HTTPS"] variable is not set, your website may experience redirect loops.', 'really-simple-ssl') . " "
                                .__('Activate networkwide to fix this.', 'really-simple-ssl'),
				        'icon' => 'warning'
			        ),
		        ),
	        );

	        $notices['subdomains_no_wildcard'] = array(
		        'callback' => 'RSSSL()->rsssl_multisite->subdomains_no_wildcard',
		        'score' => 30,
		        'output' => array(
			        'subdomains-no-wildcard' => array(
				        'msg' => __("You run a Multisite installation with subdomains, but your site doesn't have a wildcard certificate.", 'really-simple-ssl') . " "
				                 . __("This leads to issues when activating SSL networkwide since subdomains will be forced over SSL as well while they don't have a valid certificate.", 'really-simple-ssl') . " "
				                 . __("Activate SSL per site or install a wildcard certificate to fix this.", 'really-simple-ssl'),
				        'icon' => 'warning',
				        'dismissible' => true,
			        ),
		        ),
	        );

            return $notices;
        }

	    /**
         * Get string success or fail network wide or per site
	     * @return string
	     */

        public function ssl_activation_status(){

            if ( $this->selected_networkwide_or_per_site ) {
                if ( $this->ssl_enabled_networkwide ){
                    return 'ssl-networkwide';
                } else {
	                return 'ssl-per-site';
                }
            } else {
                return 'ssl-not-enabled';
            }
        }

	    /**
         * Check if site has a server var issue.
	     * @return string
	     */

        public function multisite_server_variable_warning(){
	        if (!$this->ssl_enabled_networkwide && $this->selected_networkwide_or_per_site && $this->is_multisite_subfolder_install()) {
		        //with no server variables, the website could get into a redirect loop.
		        if (RSSSL()->really_simple_ssl->no_server_variable) {
                    return 'no-server-variable';
		        }
	        }
	        return 'success';
        }

	    /**
         * Check if we have a subdomains setup, but no wildcard
	     * @return string
	     */

	    public function subdomains_no_wildcard(){

		    if (!RSSSL()->really_simple_ssl->ssl_enabled && !$this->is_multisite_subfolder_install() && !RSSSL()->rsssl_certificate->is_wildcard() && !get_site_option("rsssl_wildcard_message_shown")) {
                return 'subdomains-no-wildcard';
		    }
		    return 'success';
	    }

	    /**
         * Add settings link on plugins overview page
	     * @param array $links
         * @since  2.0
	     * @access public
	     * @return array
	     */

	    public function plugin_settings_link($links)
	    {
		    $settings_link = '<a href="' . admin_url("options-general.php?page=rlrsssl_really_simple_ssl") . '">' . __("Settings", "really-simple-ssl") . '</a>';
		    array_unshift($links, $settings_link);

		    if ( apply_filters('rsssl_settings_link', 'free') === 'free' ) {
			    $support = '<a target="_blank" href="https://wordpress.org/support/plugin/really-simple-ssl/">' . __('Support', 'really-simple-ssl') . '</a>';
		    } else {
			    $support = '<a target="_blank" href="https://really-simple-ssl.com/support">' . __('Premium Support', 'really-simple-ssl') . '</a>';
		    }
		    array_unshift($links, $support);

		    if ( ! defined( 'rsssl_pro_version' ) ) {
			    $upgrade_link = '<a style="color:#2271b1;font-weight:bold" target="_blank" href="https://really-simple-ssl.com/pro#multisite">'
			                    . __( 'Improve security - Upgrade to Pro', 'really-simple-ssl' ) . '</a>';
			    array_unshift( $links, $upgrade_link );
		    }
		    return $links;
	    }

	    /**
         * When a new site is added, maybe activate SSL as well.
         *
	     * @param int $blog_id
	     * @param bool $user_id
	     * @param bool $domain
	     * @param bool $path
	     * @param bool $site_id
	     * @param bool $meta
	     */

        public function maybe_activate_ssl_in_new_blog_deprecated($blog_id, $user_id=false, $domain=false, $path=false, $site_id=false, $meta=false)
        {
            if ($this->ssl_enabled_networkwide) {
                $site = get_blog_details($blog_id);
                $this->switch_to_blog_bw_compatible($site);
                RSSSL()->really_simple_ssl->activate_ssl();
                restore_current_blog();
            }
        }

        /**
         * Activate SSl in new block
         * @since 3.1.6
         * @param $site
         * @return void
         */

        public function maybe_activate_ssl_in_new_blog($site)
        {
            if ($this->ssl_enabled_networkwide) {
                $this->switch_to_blog_bw_compatible($site);
                RSSSL()->really_simple_ssl->activate_ssl();
                restore_current_blog();
            }
        }


        public function networkwide_choice_notice()
        {
            if ($this->plugin_network_wide_active() && !$this->selected_networkwide_or_per_site) {
                add_action('network_admin_notices', array($this, 'show_notice_activate_networkwide'), 10);
            }
        }

        public function load_options()
        {
            $options = get_site_option('rlrsssl_network_options');
            $this->selected_networkwide_or_per_site = isset($options["selected_networkwide_or_per_site"]) ? $options["selected_networkwide_or_per_site"] : false;
            $this->ssl_enabled_networkwide = isset($options["ssl_enabled_networkwide"]) ? $options["ssl_enabled_networkwide"] : false;
            $this->wp_redirect = isset($options["wp_redirect"]) ? $options["wp_redirect"] : false;
            $this->htaccess_redirect = isset($options["htaccess_redirect"]) ? $options["htaccess_redirect"] : false;
            $this->do_not_edit_htaccess = isset($options["do_not_edit_htaccess"]) ? $options["do_not_edit_htaccess"] : false;
            $this->autoreplace_mixed_content = isset($options["autoreplace_mixed_content"]) ? $options["autoreplace_mixed_content"] : false;
            $this->javascript_redirect = isset($options["javascript_redirect"]) ? $options["javascript_redirect"] : false;
            $this->hsts = isset($options["hsts"]) ? $options["hsts"] : false;
            $this->mixed_content_admin = isset($options["mixed_content_admin"]) ? $options["mixed_content_admin"] : false;
            $this->cert_expiration_warning = isset($options["cert_expiration_warning"]) ? $options["cert_expiration_warning"] : false;
            $this->hide_menu_for_subsites = isset($options["hide_menu_for_subsites"]) ? $options["hide_menu_for_subsites"] : false;
	        $this->dismiss_all_notices = isset($options["dismiss_all_notices"]) ? $options["dismiss_all_notices"] : false;
        }


        /**
         * @param $networkwide
         *
         * On plugin activation, we can check if it is networkwide or not.
         *
         * @since  2.1
         *
         * @access public
         */

        public function activate($networkwide)
        {
            //if networkwide, we ask, if not, we set it as selected.
            if (!$networkwide) {
                $this->selected_networkwide_or_per_site = true;
                $this->ssl_enabled_networkwide = false;
                $this->save_options();
            }

        }

        /**
            Add network menu for SSL
            Only when plugin is network activated.
        */

        public function add_multisite_menu()
        {
            if (!$this->plugin_network_wide_active()) return;

            register_setting('rsssl_network_options', 'rsssl_options');
            add_settings_section('rsssl_network_settings', __("Settings", "really-simple-ssl"), array($this, 'section_text'), "really-simple-ssl");
            $help = rsssl_help::this()->get_help_tip(__("Select to enable SSL networkwide or per site.", "really-simple-ssl"), true );
            add_settings_field('id_ssl_enabled_networkwide', $help.__("Enable SSL", "really-simple-ssl"), array($this, 'get_option_enable_multisite'), "really-simple-ssl", 'rsssl_network_settings');
	        $help = rsssl_help::this()->get_help_tip(__("Enable this option to permanently dismiss all +1 notices in the 'Your progress' tab", "really-simple-ssl"), true );
	        add_settings_field('id_dismiss_all_notices', $help.__("Dismiss all Really Simple SSL notices", "really-simple-ssl"), array($this, 'get_option_dismiss_all_notices'), "really-simple-ssl", 'rsssl_network_settings');
	        add_submenu_page('settings.php', "SSL", "SSL", 'manage_network_options', "really-simple-ssl", array(&$this, 'settings_tab'));
        }

        /**
            Shows the content of the multisite menu page
        */

        public function section_text() {}

        public function get_option_enable_multisite()
        {
            $disable_per_site = !$this->can_activate_per_site() ? 'disabled="disabled"':''
            ?>
            <select name="rlrsssl_network_options[ssl_enabled_networkwide]">
                <?php if (!$this->selected_networkwide_or_per_site) { ?>
                <option value="-1" <?php if (!$this->selected_networkwide_or_per_site) echo "selected"; ?>><?php _e("Choose option", "really-simple-ssl") ?>
                    <?php } ?>
                <option value="1" <?php if ($this->selected_networkwide_or_per_site && $this->ssl_enabled_networkwide) echo "selected"; ?>><?php _e("networkwide", "really-simple-ssl") ?>
                <option value="0" <?php echo $disable_per_site?> <?php if ($this->selected_networkwide_or_per_site && !$this->ssl_enabled_networkwide) echo "selected"; ?>><?php _e("per site", "really-simple-ssl") ?>
            </select>
            <?php
        }

	    /**
         * Check if the plugin can be activated per site
	     * @return bool|string
	     */
        public function can_activate_per_site(){
	        $can_activate_per_site = true;
	        //only block the network wide option if it's not enabled.
	        if ( !$this->selected_networkwide_or_per_site || $this->ssl_enabled_networkwide) {
		        $can_activate_per_site = $this->get_total_blog_count()<50 || !RSSSL()->really_simple_ssl->do_wpconfig_loadbalancer_fix;
	        }
            return $can_activate_per_site;
        }

	    /**
	     *
	     * Get the option to dismiss all Really Simple SSL notices
	     *
	     * @since 5.1.2
	     *
	     * @access public
	     *
	     */

	    public function get_option_dismiss_all_notices()
	    {
		    ?>
            <label class="rsssl-switch">
                <input id="rlrsssl_network_options" name="rlrsssl_network_options[dismiss_all_notices]" size="40" value="1"
                       type="checkbox" <?php checked(1, $this->dismiss_all_notices, true) ?> />
                <span class="rsssl-slider rsssl-round"></span>
            </label>
		    <?php
	    }


		/**
		 * Build the settings page
		 *
		 * @since  2.0
		 *
		 * @access public
		 *
		 */

		public function general_grid(){
			$grid_items = array(
				'progress' =>array(
					'title' => __("Your progress", "really-simple-ssl"),
					'header' => rsssl_template_path . 'progress-header.php',
					'content' => rsssl_template_path . 'progress.php',
					'footer' => rsssl_template_path . 'progress-footer.php',
					'class' => 'regular rsssl-progress',
					'type' => 'all',
				),
				'ms_settings' => array(
					'title' => __("Settings", "really-simple-ssl"),
					'header' => rsssl_template_path . 'header.php',
					'content' => rsssl_template_path . 'ms-settings.php',
					'footer' => rsssl_template_path . 'settings-footer.php',
					'class' => ' settings',
					'type' => 'settings',
				),
				'support' => array(
					'title' => __("Support forum", "really-simple-ssl"),
					'header' => '',
					'content' => rsssl_template_path . 'support.php',
					'footer' => rsssl_template_path . 'support-footer.php',
					'type' => 'tasks',
					'class' => 'half-height',
				),
				'plugins' => array(
					'title' => __("Our plugins", "really-simple-ssl"),
					'header' => rsssl_template_path . 'header.php',
					'content' => rsssl_template_path . 'other-plugins.php',
					'footer' => '',
					'class' => 'half-height no-border no-background upsell-grid-container',
					'type' => 'plugins',
					'can_hide' => false,
				),
			);
			$grid_items = apply_filters( 'rsssl_grid_items_ms',  $grid_items );

			$defaults = array(
				'title' => '',
				'header' => rsssl_template_path . 'header.php',
				'content' => '',
				'footer' => '',
				'class' => '',
				'type' => 'plugins',
				'can_hide' => true,
				'instructions' => false,
			);
			foreach ($grid_items as $key => $grid_item ) {
				$grid_items[$key] = wp_parse_args($grid_item, $defaults);
			}
			return $grid_items;
		}

		public function settings_tab()
        {
            if (isset($_GET['updated'])): ?>
                <div id="message" class="updated notice is-dismissible">
                    <p><?php _e('Options saved.', 'really-simple-ssl') ?></p>
                </div>
            <?php endif; ?>

            <div class="nav-tab-wrapper">
                <div class="rsssl-logo-container">
                    <div id="rsssl-logo"><img src="<?php echo rsssl_url?>/assets/really-simple-ssl-logo.png" alt="logo"></div>
                </div>


                <div class="header-links">
                    <div class="documentation">
                        <a href="https://really-simple-ssl.com/knowledge-base" target="_blank" class="<?php if (defined('rsssl_pro_version')) echo "button button-primary"?>"><?php _e("Documentation", "really-simple-ssl");?></a>
                    </div>
                    <div class="header-upsell">
		                <?php if (defined('rsssl_pro_version')) { ?>
		                <?php } else { ?>
                            <div class="documentation">
                                <a href="https://wordpress.org/support/plugin/really-simple-ssl/" class="button button-primary" target="_blank"><?php _e("Support", "really-simple-ssl") ?></a>
                            </div>
		                <?php } ?>
                    </div>
                </div>

            </div>

            <div class="rsssl-container">
                <div class="rsssl-main"><?php
                    RSSSL()->really_simple_ssl->render_grid($this->general_grid());
                    do_action("rsssl_configuration_page");
			        ?>
                </div>
            </div>

            <?php
        }


        /**
         * Save network settings
         */

        public function update_network_options()
        {
            if (!isset($_POST['rsssl_ms_nonce']) || !wp_verify_nonce($_POST['rsssl_ms_nonce'], 'rsssl_ms_settings_update')) return;
            if (! rsssl_user_can_manage() ) return;

	        do_action('rsssl_process_network_options');

            if (isset($_POST["rlrsssl_network_options"])) {
                $prev_ssl_enabled_networkwide = $this->ssl_enabled_networkwide;
                $options = array_map(array($this, "sanitize_boolean"), $_POST["rlrsssl_network_options"]);
                $options["selected_networkwide_or_per_site"] = true;
                $this->ssl_enabled_networkwide = isset($options["ssl_enabled_networkwide"]) ? $options["ssl_enabled_networkwide"] : false;
                $this->wp_redirect = isset($options["wp_redirect"]) ? $options["wp_redirect"] : false;
                $this->htaccess_redirect = isset($options["htaccess_redirect"]) ? $options["htaccess_redirect"] : false;
                $this->do_not_edit_htaccess = isset($options["do_not_edit_htaccess"]) ? $options["do_not_edit_htaccess"] : false;
                $this->autoreplace_mixed_content = isset($options["autoreplace_mixed_content"]) ? $options["autoreplace_mixed_content"] : false;
                $this->javascript_redirect = isset($options["javascript_redirect"]) ? $options["javascript_redirect"] : false;
                $this->hsts = isset($options["hsts"]) ? $options["hsts"] : false;
                $this->mixed_content_admin = isset($options["mixed_content_admin"]) ? $options["mixed_content_admin"] : false;
                $this->cert_expiration_warning = isset($options["cert_expiration_warning"]) ? $options["cert_expiration_warning"] : false;
                $this->hide_menu_for_subsites = isset($options["hide_menu_for_subsites"]) ? $options["hide_menu_for_subsites"] : false;
                $this->selected_networkwide_or_per_site = isset($options["selected_networkwide_or_per_site"]) ? $options["selected_networkwide_or_per_site"] : false;
	            $this->dismiss_all_notices = isset($options["dismiss_all_notices"]) ? $options["dismiss_all_notices"] : false;

	            $this->save_options();

	            if ($this->ssl_enabled_networkwide && !$prev_ssl_enabled_networkwide) {
		            //reset
		            $this->start_ssl_activation();
		            //enable SSL on all  sites on the network
	            }

	            if (!$this->ssl_enabled_networkwide && $prev_ssl_enabled_networkwide ) {
		            //if we switch to per page, we deactivate SSL on all pages first, but only if the setting was changed.
		            $this->start_ssl_deactivation();
	            }

            }

            // At last we redirect back to our options page.
            wp_redirect(add_query_arg(array('page' => "really-simple-ssl", 'updated' => 'true'), network_admin_url('settings.php')));
            exit;
        }

        public function sanitize_boolean($value)
        {
            if ($value == true) {
                return true;
            } else {
                return false;
            }
        }


        /**
         * Give the user an option to activate networkwide or not.
         * Needs to be called after detect_configuration function
         *
         * @since  2.3
         *
         * @access public
         *
         */

        public function show_notice_activate_networkwide()
        {
            //prevent showing the review on edit screen, as gutenberg removes the class which makes it editable.
            $screen = get_current_screen();
	        if ( $screen->base === 'post' ) return;

            if (is_network_admin() && RSSSL()->really_simple_ssl->wpconfig_ok()) {
	            $disable_per_site = !$this->can_activate_per_site() ? 'disabled="disabled"':'';

                $class = "updated notice activate-ssl really-simple-plugins";
                $title = __("Setup", "really-simple-ssl");
                $content = '<h2>' . __("Some things can't be done automatically. Before you migrate, please check for: ", "really-simple-ssl") . '</h2>';
                $content .= '<ul>
                                <li>'. __("Http references in your .css and .js files: change any http:// into https://", "really-simple-ssl") .'</li>
                                <li>'. __("Images, stylesheets or scripts from a domain without an SSL certificate: remove them or move to your own server.", "really-simple-ssl") .'</li>
                            </ul>';
                $content .= __('You can also let the automatic scan of the pro version handle this for you, and get premium support and increased security with HSTS included.', 'really-simple-ssl') . " "
                    . '<a target="_blank"
                     href="https://really-simple-ssl.com/pro-multisite">' . __("Check out Really Simple SSL Premium", "really-simple-ssl") . '</a>' . "<br>";

                $footer = '<form action="" method="post">'. wp_nonce_field('rsssl_nonce', 'rsssl_nonce').'
                        <input type="submit" class="button button-primary"
                       value="'. __("Activate SSL networkwide", "really-simple-ssl").'"
                       id="rsssl_do_activate_ssl_networkwide" name="rsssl_do_activate_ssl_networkwide">
                       <input '.$disable_per_site.' type="submit" class="button button-primary"
                       value="'. __("Activate SSL per site", "really-simple-ssl").'"
                       id="rsssl_do_activate_ssl_per_site" name="rsssl_do_activate_ssl_per_site">';
                $footer .= '</form>';
	            $content .= '<ul>';
                if ( !$this->can_activate_per_site() ) {
	                $content .= '<li class="rsssl-error">'.__( "Per site activation is not available above 50 sites", "really-simple-ssl" ) . '</li>';
                }
                $content .= '<li class="rsssl-error">'.__("Networkwide activation does not check if a site has an SSL certificate. It just migrates all sites to SSL.", "really-simple-ssl"). '</li>';
                $content .= '</ul>';
	            echo RSSSL()->really_simple_ssl->notice_html($class, $title, $content, $footer);
            }
        }

        /**
         * @since 2.3
         * Shows option to buy pro
         */

        public function show_pro()
        {
            ?>
            <p><?php _e('You can also let the automatic scan of the pro version handle this for you, and get premium support and increased security with HSTS included.', 'really-simple-ssl') ?>
                &nbsp;<a target="_blank"
                         href="https://really-simple-ssl.com/pro-multisite"><?php _e("Check out Really Simple SSL Premium", "really-simple-ssl"); ?></a>
            </p>
            <?php
        }


        /*

            Check if the plugin is network activated.

        */


        public function plugin_network_wide_active()
        {
            if (!function_exists('is_plugin_active_for_network'))
                require_once(ABSPATH . '/wp-admin/includes/plugin.php');

            if (is_plugin_active_for_network(rsssl_plugin)) {
                return true;
            } else {
                return false;
            }
        }


        public function process_networkwide_choice()
        {

            if (!$this->plugin_network_wide_active()) return;

            if (isset($_POST['rsssl_do_activate_ssl_networkwide'])) {

                $this->selected_networkwide_or_per_site = true;
                $this->ssl_enabled_networkwide = true;
                $this->wp_redirect = true;
                $this->save_options();

                //enable SSL on all sites on the network
                $this->start_ssl_activation();
            }

            if (isset($_POST['rsssl_do_activate_ssl_per_site'])) {

                $this->selected_networkwide_or_per_site = true;
                $this->ssl_enabled_networkwide = false;
                $this->save_options();
            }

	        if (isset($_POST['rsssl_do_activate_ssl_networkwide']) || isset($_POST['rsssl_do_activate_ssl_per_site']) ) {
		        $url = add_query_arg( array(
			        "page" => "really-simple-ssl",
		        ), network_admin_url( "settings.php" ) );
		        wp_safe_redirect( $url );
		        exit;
	        }
        }


        public function save_options()
        {
	        if ( ! rsssl_user_can_manage() ) return;

            $options = get_site_option("rlrsssl_network_options");
            if (!is_array($options)) $options = array();

            $options["selected_networkwide_or_per_site"] = $this->selected_networkwide_or_per_site;
            $options["ssl_enabled_networkwide"] = $this->ssl_enabled_networkwide;
            $options["wp_redirect"] = $this->wp_redirect;
            $options["htaccess_redirect"] = $this->htaccess_redirect;
            $options["do_not_edit_htaccess"] = $this->do_not_edit_htaccess;
            $options["autoreplace_mixed_content"] = $this->autoreplace_mixed_content;
            $options["javascript_redirect"] = $this->javascript_redirect;
            $options["hsts"] = $this->hsts;
            $options["mixed_content_admin"] = $this->mixed_content_admin;
            $options["cert_expiration_warning"] = $this->cert_expiration_warning;
            $options["hide_menu_for_subsites"] = $this->hide_menu_for_subsites;
	        $options["dismiss_all_notices"] = $this->dismiss_all_notices;

	        update_site_option("rlrsssl_network_options", $options);
        }


        public function ssl_process_active(){

            if (get_site_option('rsssl_ssl_activation_active')){
                return true;
            }

            if ( get_site_option('rsssl_ssl_deactivation_active')){
                return true;
            }

            return false;
        }

        public function run_ssl_process(){
            // if (!get_site_option('rsssl_run')) return;

            if (get_site_option('rsssl_ssl_activation_active')){
                $this->activate_ssl_networkwide();
            }

            if (get_site_option('rsssl_ssl_deactivation_active')){
                //$this->deactivate_ssl_networkwide();
	            $this->end_ssl_deactivation();
            }

            update_site_option('rsssl_run', false);

        }

        public function get_process_completed_percentage(){
            $complete_count = get_site_option('rsssl_siteprocessing_progress');
            $percentage = round(($complete_count/$this->get_total_blog_count())*100,0);
            if ($percentage > 99) $percentage = 100;

            return intval($percentage);
        }

        public function start_ssl_activation(){
            update_site_option('rsssl_siteprocessing_progress', 0);
            update_site_option('rsssl_ssl_activation_active', true);
        }

        public function end_ssl_activation(){
            update_site_option('rsssl_ssl_activation_active', false);
            update_site_option('run_ssl_process_hook_switched', false);
        }

        public function start_ssl_deactivation(){
            update_site_option('rsssl_siteprocessing_progress', 0);
            update_site_option('rsssl_ssl_deactivation_active', true);
        }

        public function end_ssl_deactivation(){
            update_site_option('rsssl_ssl_deactivation_active', false);
            update_site_option('run_ssl_process_hook_switched', false);
        }

        public function deactivate_ssl_networkwide(){
            //run chunked
            $nr_of_sites = 200;
            $current_offset = get_site_option('rsssl_siteprocessing_progress');

            //set batch of sites
            $sites = $this->get_sites_bw_compatible($current_offset, $nr_of_sites);

            //if no sites are found, we assume we're done.
            if (count($sites)==0) {
                $this->end_ssl_deactivation();
            } else {
                foreach ($sites as $site) {
                    $this->switch_to_blog_bw_compatible($site);
                    RSSSL()->really_simple_ssl->deactivate_ssl();
                    restore_current_blog(); //switches back to previous blog, not current, so we have to do it each loop
                    update_site_option('rsssl_siteprocessing_progress', $current_offset+$nr_of_sites);
                }
            }
        }

	    /**
	     * Activate SSL network wide
	     */

        public function activate_ssl_networkwide()
        {
            //run chunked
            $nr_of_sites = 200;
            $current_offset = get_site_option('rsssl_siteprocessing_progress');

            //set batch of sites
            $sites = $this->get_sites_bw_compatible($current_offset, $nr_of_sites);

            //if no sites are found, we assume we're done.
            if (count($sites)==0) {
                $this->end_ssl_activation();
            } else {
                foreach ($sites as $site) {
                    $this->switch_to_blog_bw_compatible($site);
                    RSSSL()->really_simple_ssl->activate_ssl();
                    restore_current_blog(); //switches back to previous blog, not current, so we have to do it each loop
                    update_site_option('rsssl_siteprocessing_progress', $current_offset+$nr_of_sites);
                }
            }
        }


        //change deprecated function depending on version.
        /**
         * Offset is used to chunk the site loops.
         * But offset is not used in the pre 4.6 function.
         *
         *
         * */
        public function get_sites_bw_compatible($offset=0, $nr_of_sites=100)
        {
            global $wp_version;

            $args = array(
                'number' => $nr_of_sites,
                'offset' => $offset,
            );
            $sites = ($wp_version >= 4.6) ? get_sites($args) : wp_get_sites();
            return $sites;
        }

        /**
              The new get_sites function returns an object.
        */

        public function switch_to_blog_bw_compatible($site)
        {
            global $wp_version;
            if ($wp_version >= 4.6) {
                switch_to_blog($site->blog_id);
            } else {
                switch_to_blog($site['blog_id']);
            }
        }

        public function deactivate()
        {
            $options = get_site_option("rlrsssl_network_options");
            $options["selected_networkwide_or_per_site"] = false;
            $options["wp_redirect"] = false;
            $options["htaccess_redirect"] = false;
            $options["do_not_edit_htaccess"] = false;
            $options["autoreplace_mixed_content"] = false;
            $options["javascript_redirect"] = false;
            $options["hsts"] = false;
            $options["mixed_content_admin"] = false;
            $options["cert_expiration_warning"] = false;
            $options["hide_menu_for_subsites"] = false;
	        $options["dismiss_all_notices"] = false;

            unset($options["ssl_enabled_networkwide"]);
            update_site_option("rlrsssl_network_options", $options);

            //because the deactivation should be a one click procedure, chunking this would cause dificulties
            $sites = $this->get_sites_bw_compatible(0, $this->get_total_blog_count());
            foreach ($sites as $site) {
                $this->switch_to_blog_bw_compatible($site);
                RSSSL()->really_simple_ssl->deactivate_ssl();
                restore_current_blog(); //switches back to previous blog, not current, so we have to do it each loop
            }


        }


        /**
         * filters the get_admin_url function to correct the false https urls wordpress returns for non SSL websites.
         *
         * @since 2.3.10
         *
         */

        public function check_admin_protocol($url, $path, $blog_id)
        {
            if (!$blog_id) $blog_id = get_current_blog_id();

            //if the force_ssl_admin is defined, the admin_url should not be forced back to http: all admin panels should be https.
            if (defined('FORCE_SSL_ADMIN')) return $url;

            //do not force to http if the request is made for an url of the current blog.
            //if a site is loaded over https, it should return https links, unless the url is requested for another blog.
            //In that case, we only return a https link if the site_url is https, and http otherwise.
            if (get_current_blog_id() == $blog_id) return $url;

            //now check if the blog is http or https, and change the url accordingly
            if (!$this->ssl_enabled_networkwide) {
                $home_url = get_blog_option($blog_id, 'home');
                if (strpos($home_url, "https://") === false) {
                    $url = str_replace("https://", "http://", $url);
                }
            }


            return $url;
        }

        /**
         * filters the home_url and/or site_url function to correct the false https urls wordpress returns for non SSL websites.
         *
         * @since 2.3.17
         *
         */

        public function check_site_protocol($url, $path, $orig_scheme, $blog_id)
        {
            if (!$blog_id) $blog_id = get_current_blog_id();

            if (get_current_blog_id() == $blog_id) return $url;

            if (!$this->ssl_enabled_networkwide) {
                $home_url = get_blog_option($blog_id, 'home');
                if (strpos($home_url, "https://") === false) {
                    $url = str_replace("https://", "http://", $url);
                }
            }
            return $url;
        }


        /**
         * Checks if we are on a subfolder install. (domain.com/site1 )
         *
         * @since  2.2
         *
         * @access public
         *
         **/

        public function is_multisite_subfolder_install()
        {
            if (!is_multisite()) return FALSE;
            //we check this manually, as the SUBDOMAIN_INSTALL constant of wordpress might return false for domain mapping configs
            $is_subfolder = FALSE;
            $sites = $this->get_sites_bw_compatible(0, 10);
            foreach ($sites as $site) {
                $this->switch_to_blog_bw_compatible($site);
                if ($this->is_subfolder(home_url())) {
                    $is_subfolder = TRUE;
                }
                restore_current_blog(); //switches back to previous blog, not current, so we have to do it each loop
                if ($is_subfolder) return true;
            }

            return $is_subfolder;
        }

        /**
         * Test if a domain has a subfolder structure
         *
         * @since  2.2
         *
         * @param string $domain
         *
         * @access private
         *
         * @return bool
         */

        public function is_subfolder($domain)
        {

            //remove slashes of the http(s)
            $domain = preg_replace("/(http:\/\/|https:\/\/)/", "", $domain);
            if (strpos($domain, "/") !== FALSE) {
                return true;
            }
            return false;
        }

        public function is_per_site_activated_multisite_subfolder_install()
        {
            if (is_multisite() && $this->is_multisite_subfolder_install() && !$this->ssl_enabled_networkwide) {
                return true;
            }

            return false;
        }

        /**
         *
         * Sometimes conversion of websites hangs on 0%. If user clicks the link, the hook where run_ssl_process (multisite-cron.php)
         * fires on will be switched to admin_init
         *
         */

        public function listen_for_ssl_conversion_hook_switch()
        {
            //check if we are on ssl settings page
            if (!$this->is_settings_page()) return;
            //check user role
            if (! rsssl_user_can_manage() ) return;
            //check nonce
            if (!isset($_GET['token']) || (!wp_verify_nonce($_GET['token'], 'run_ssl_to_admin_init'))) return;
            //check for action
            if (isset($_GET["action"]) && $_GET["action"] == 'ssl_conversion_hook_switch') {
                update_site_option('run_ssl_process_hook_switched', true);
            }
        }

        /**
         * Show notices
         *
         * @since  2.0
         *
         * @access public
         *
         */

        public function show_notices()
        {
            //prevent showing the review on edit screen, as gutenberg removes the class which makes it editable.
            $screen = get_current_screen();
	        if ( $screen->base === 'post' ) return;

	        if ( !$this->is_settings_page() ) {
		        $notices = RSSSL()->really_simple_ssl->get_notices_list( array('admin_notices'=>true) );
		        foreach ( $notices as $id => $notice ){
			        $notice = $notice['output'];
			        $class = ( $notice['status'] !== 'completed' ) ? 'error' : 'updated';
			        $footer = isset($notice['url']) ? '<a class="button" target="_blank" href="' . esc_url_raw($notice['url']) . '">'.__("More info", "really-simple-ssl").'</a>' : '';
			        echo RSSSL()->really_simple_ssl->notice_html( $class.' '.$id, $notice['title'], $notice['msg'], $footer );
		        }
            }

            /**
             * ssl switch for sites processing active
             */

            if ($this->ssl_process_active()) {
                $class = "notice is-dismissible rlrsssl-fail";
                $title = "Website conversion";

                //In some cases the rsssl_ssl_process_hook hook can fail. Therefore we offer the option to switch the hook to admin_init when the conversion is stuck.
                $token = wp_create_nonce('run_ssl_to_admin_init');
                $run_ssl_process_hook_switch_link = network_admin_url("settings.php?page=really-simple-ssl&action=ssl_conversion_hook_switch&token=" . $token);

                $link_open = '<a target="_self" href="' . $run_ssl_process_hook_switch_link . '">';
                $link_close = '</a>';
                $completed = $this->get_process_completed_percentage();

                if ($completed < 100){
	                $class.=" error ";
	                $content = sprintf(__("Conversion of websites %s percent complete.", "really-simple-ssl"), $completed) . " ";
	                $content .= __("Site conversion in progress. Please refresh this page to check if the process has finished. It will proceed in the background.", "really-simple-ssl") . " ";
	                $content .= sprintf(__("If the conversion does not proceed after a few minutes, click %shere%s to force the conversion process.", "really-simple-ssl"), $link_open, $link_close);
                } else {
	                $class.=" updated ";
	                $activation_active = get_site_option('rsssl_ssl_activation_active');
	                $content = __("Conversion of websites completed.", "really-simple-ssl") . " ";
	                if ($activation_active) {
		                $content .= __("Really Simple SSL has converted all your websites to SSL.", "really-simple-ssl");
		                $this->end_ssl_activation();
	                } else {
		                $content .= __("Really Simple SSL has converted all your websites to non SSL.", "really-simple-ssl");
		                $this->end_ssl_deactivation();
	                }

                }

                echo RSSSL()->really_simple_ssl->notice_html($class, $title, $content);
            }
        }


        /**
         * Insert some ajax script to dismiss the SSL success message, and stop nagging about it
         *
         * @since  2.0
         *
         * @access public
         *
         */

        public function insert_dismiss_success()
        {
            if ($this->selected_networkwide_or_per_site && !get_site_option("rsssl_success_message_shown")) {
                $ajax_nonce = wp_create_nonce("really-simple-ssl-dismiss");
                ?>
                <script type='text/javascript'>
                    jQuery(document).ready(function ($) {
                        $(".rlrsssl-multisite-success.notice.is-dismissible").on("click", ".notice-dismiss", function (event) {

                            var data = {
                                'action': 'dismiss_success_message_multisite',
                                'security': '<?php echo $ajax_nonce; ?>'
                            };

                            $.post(ajaxurl, data, function (response) {

                            });
                        });
                    });
                </script>
                <?php
            }
        }

        public function insert_dismiss_wildcard_warning()
        {
            if ($this->selected_networkwide_or_per_site && !get_site_option("rsssl_success_message_shown")) {
                $ajax_nonce = wp_create_nonce("really-simple-ssl-dismiss");
                ?>
                <script type='text/javascript'>
                    jQuery(document).ready(function ($) {
                        $(".rlrsssl-multisite-wildcard-warning.notice.is-dismissible").on("click", ".notice-dismiss", function (event) {

                            var data = {
                                'action': 'dismiss_wildcard_warning',
                                'security': '<?php echo $ajax_nonce; ?>'
                            };

                            $.post(ajaxurl, data, function (response) {

                            });
                        });
                    });
                </script>
                <?php
            }
        }


        /**
         * Process the ajax dismissal of the success message.
         *
         * @since  2.0
         *
         * @access public
         *
         */

        public function dismiss_success_message_callback()
        {
            check_ajax_referer('really-simple-ssl-dismiss', 'security');
            update_site_option("rsssl_success_message_shown", true);
            wp_die();
        }

        public function dismiss_wildcard_message_callback()
        {
            check_ajax_referer('really-simple-ssl-dismiss', 'security');
            update_site_option("rsssl_wildcard_message_shown", true);
            wp_die();
        }

        public function is_settings_page()
        {
            return (isset($_GET['page']) && $_GET['page'] == 'really-simple-ssl') ? true : false;
        }

        public function get_total_blog_count()
        {
            //Get the total blog count from all multisite networks
            $networks = get_networks();

            $total_blog_count = 0;

            foreach($networks as $network){

                $network_id = ($network->__get('id'));
                $blog_count = get_blog_count($network_id);
                $total_blog_count += $blog_count;
            }

            return $total_blog_count;
        }

    } //class closure
}