<?php

include_once('class.swpm-utils-misc.php');
include_once('class.swpm-utils.php');
include_once('class.swpm-utils-member.php');
include_once('class.swpm-utils-membership-level.php');
include_once('class.swpm-utils-template.php');
include_once('class.swpm-init-time-tasks.php');
include_once('class.swpm-wp-loaded-tasks.php');
include_once('class.swpm-self-action-handler.php');
include_once('class.swpm-comment-form-related.php');
include_once('class.swpm-settings.php');
include_once('class.swpm-protection.php');
include_once('class.swpm-permission.php');
include_once('class.swpm-auth.php');
include_once('class.swpm-access-control.php');
include_once('class.swpm-form.php');
include_once('class.swpm-transfer.php');
include_once('class.swpm-front-form.php');
include_once('class.swpm-level-form.php');
include_once('class.swpm-membership-levels.php');
include_once('class.swpm-log.php');
include_once('class.swpm-messages.php');
include_once('class.swpm-ajax.php');
include_once('class.swpm-registration.php');
include_once('class.swpm-front-registration.php');
include_once('class.swpm-admin-registration.php');
include_once('class.swpm-membership-level.php');
include_once('class.swpm-membership-level-custom.php');
include_once('class.swpm-permission-collection.php');
include_once('class.swpm-auth-permission-collection.php');
include_once('class.swpm-transactions.php');
include_once('shortcode-related/class.swpm-shortcodes-handler.php');

class SimpleWpMembership {

    public function __construct() {

        new SwpmShortcodesHandler(); //Tackle the shortcode definitions and implementation.
        new SwpmSelfActionHandler(); //Tackle the self action hook handling.

        add_action('admin_menu', array(&$this, 'menu'));
        add_action('init', array(&$this, 'init_hook'));
        add_action('wp_loaded', array(&$this, 'handle_wp_loaded_tasks'));

        add_filter('the_content', array(&$this, 'filter_content'), 20, 1);
        add_filter('widget_text', 'do_shortcode');
        add_filter('show_admin_bar', array(&$this, 'hide_adminbar'));
        add_filter('comment_text', array(&$this, 'filter_comment'));
        add_filter('comment_form_defaults', array('SwpmCommentFormRelated', 'customize_comment_fields'));
        add_filter('wp_get_attachment_url', array(&$this, 'filter_attachment_url'), 10, 2);
        add_filter('wp_get_attachment_metadata', array(&$this, 'filter_attachment'), 10, 2);
        add_filter('attachment_fields_to_save', array(&$this, 'save_attachment_extra'), 10, 2);

        //TODO - refactor these shortcodes into the shortcodes handler class
        add_shortcode("swpm_registration_form", array(&$this, 'registration_form'));
        add_shortcode('swpm_profile_form', array(&$this, 'profile_form'));
        add_shortcode('swpm_login_form', array(&$this, 'login'));
        add_shortcode('swpm_reset_form', array(&$this, 'reset'));

        add_action('wp_head', array(&$this, 'wp_head_callback'));
        add_action('save_post', array(&$this, 'save_postdata'));
        add_action('admin_notices', array(&$this, 'do_admin_notices'));
        add_action('wp_enqueue_scripts', array(&$this, 'front_library'));
        add_action('load-toplevel_page_simple_wp_membership', array(&$this, 'admin_library'));
        add_action('load-wp-membership_page_simple_wp_membership_levels', array(&$this, 'admin_library'));

        add_action('wp_login', array(&$this, 'wp_login_hook_handler'), 10, 2);
        add_action('wp_authenticate', array(&$this, 'wp_authenticate_handler'), 1, 2);
        add_action('wp_logout', array(&$this, 'wp_logout'));
        add_action('swpm_logout', array(&$this, 'swpm_do_user_logout'));
        add_action('user_register', array(&$this, 'swpm_handle_wp_user_registration'));
        add_action('profile_update', array(&$this, 'sync_with_wp_profile'), 10, 2);

        //AJAX hooks
        add_action('wp_ajax_swpm_validate_email', 'SwpmAjax::validate_email_ajax');
        add_action('wp_ajax_nopriv_swpm_validate_email', 'SwpmAjax::validate_email_ajax');
        add_action('wp_ajax_swpm_validate_user_name', 'SwpmAjax::validate_user_name_ajax');
        add_action('wp_ajax_nopriv_swpm_validate_user_name', 'SwpmAjax::validate_user_name_ajax');

        //init is too early for settings api.
        add_action('admin_init', array(&$this, 'admin_init_hook'));
        add_action('plugins_loaded', array(&$this, "plugins_loaded"));
        add_action('password_reset', array(&$this, 'wp_password_reset_hook'), 10, 2);
    }

    public function wp_head_callback() {
        //This function is triggered by the wp_head action hook
        //Check if members only commenting is allowed then customize the form accordingly
        SwpmCommentFormRelated::customize_comment_form();

        //Other wp_head related tasks go here.
    }

    function wp_password_reset_hook($user, $pass) {
        $swpm_user = SwpmMemberUtils::get_user_by_user_name($user->user_login);
        
        //Check if SWPM user entry exists
        if (empty($swpm_user)) {
            SwpmLog::log_auth_debug("wp_password_reset_hook() - SWPM user not found for username: '" . $user->user_login ."'. This is OK, assuming that this user was created directly in WP Users menu (not using SWPM).", true);
            return;
        }
        
        $swpm_id = $swpm_user->member_id;
        if (!empty($swpm_id)) {
            $password_hash = SwpmUtils::encrypt_password($pass);
            global $wpdb;
            $wpdb->update($wpdb->prefix . "swpm_members_tbl", array('password' => $password_hash), array('member_id' => $swpm_id));
        }
    }

    public function save_attachment_extra($post, $attachment) {
        $this->save_postdata($post['ID']);
        return $post;
    }

    public function filter_attachment($content, $post_id) {
        if (is_admin()) {//No need to filter on the admin side
            return $content;
        }

        $acl = SwpmAccessControl::get_instance();
        if (has_post_thumbnail($post_id)) {
            return $content;
        }

        $post = get_post($post_id);
        if ($acl->can_i_read_post($post)) {
            return $content;
        }

        if (isset($content['file'])) {
            $content['file'] = 'restricted-icon.png';
            $content['width'] = '400';
            $content['height'] = '400';
        }

        if (isset($content['sizes'])) {
            if ($content['sizes']['thumbnail']) {
                $content['sizes']['thumbnail']['file'] = 'restricted-icon.png';
                $content['sizes']['thumbnail']['mime-type'] = 'image/png';
            }
            if ($content['sizes']['medium']) {
                $content['sizes']['medium']['file'] = 'restricted-icon.png';
                $content['sizes']['medium']['mime-type'] = 'image/png';
            }
            if (isset($content['sizes']['post-thumbnail'])) {
                $content['sizes']['post-thumbnail']['file'] = 'restricted-icon.png';
                $content['sizes']['post-thumbnail']['mime-type'] = 'image/png';
            }
        }
        return $content;
    }

    public function filter_attachment_url($content, $post_id) {
        if (is_admin()) {//No need to filter on the admin side
            return $content;
        }
        $acl = SwpmAccessControl::get_instance();
        if (has_post_thumbnail($post_id)) {
            return $content;
        }

        $post = get_post($post_id);
        if ($acl->can_i_read_post($post)) {
            return $content;
        }

        return SwpmUtils::get_restricted_image_url();
    }

    public function admin_init_hook() {
        //This hook is triggered in the wp-admin side only.

        $this->common_library(); //Load the common JS libraries and Styles
        $swpm_settings_obj = SwpmSettings::get_instance();

        //Check if the "Disable Access to WP Dashboard" option is enabled.
        $disable_wp_dashboard_for_non_admins = $swpm_settings_obj->get_value('disable-access-to-wp-dashboard');
        if ($disable_wp_dashboard_for_non_admins) {
            //This option is enabled
            if ((defined('DOING_AJAX') && DOING_AJAX)) {
                //This is an ajax request. Don't do the disable dashboard check for ajax.
            } else {
                //Not an ajax request. Do the check.
                if (!current_user_can('administrator')) {
                    //This is a non-admin user. Do not show the wp dashboard.
                    $message = '<p>' . SwpmUtils::_('The admin of this site does not allow users to access the wp dashboard.') . '</p>';
                    $message .= '<p>' . SwpmUtils::_('Go back to the home page by ') . '<a href="' . SIMPLE_WP_MEMBERSHIP_SITE_HOME_URL . '">' . SwpmUtils::_('clicking here') . '</a>.' . '</p>';
                    wp_die($message);
                }
            }
        }

        //Initialize the settings menu hooks.
        $swpm_settings_obj->init_config_hooks();
        $addon_saved = filter_input(INPUT_POST, 'swpm-addon-settings');
        if (!empty($addon_saved) && current_user_can('manage_options')) {
            check_admin_referer('swpm_addon_settings_section', 'swpm_addon_settings_section_save_settings');
            do_action('swpm_addon_settings_save');
        }
    }

    public function hide_adminbar() {

        //Never show admin toolbar if the user is not even logged in
        if (!is_user_logged_in()) {
            return false;
        }

        //Show admin toolbar to admin only feature is enabled.
        $show_to_admin = SwpmSettings::get_instance()->get_value('show-adminbar-admin-only');
        if ($show_to_admin) {
            if (current_user_can('administrator')) {
                //This is an admin user so show the tooldbar
                return true;
            } else {
                return false;
            }
        }

        //Hide admin toolbar if the hide adminbar feature is enabled
        $hide = SwpmSettings::get_instance()->get_value('hide-adminbar');
        return $hide ? FALSE : TRUE;
    }

    public function shutdown() {
        SwpmLog::writeall();
    }

    public static function swpm_login($username, $pass, $rememberme = true) {
        if (is_user_logged_in()) {
            $current_user = wp_get_current_user();
            SwpmLog::log_auth_debug("static function swpm_login(). User is logged in. WP Username: " . $current_user->user_login, true);
            if ($current_user->user_login == $username) {
                return;
            }
        }
        SwpmLog::log_auth_debug("Trying wp_signon() with username: " . $username, true);
        
        add_filter('wordfence_ls_require_captcha', '__return_false');//For Wordfence plugin's captcha compatibility
        
        $user_obj = wp_signon(array('user_login' => $username, 'user_password' => $pass, 'remember' => $rememberme), is_ssl());
        if ($user_obj instanceof WP_User) {
            wp_set_current_user($user_obj->ID, $user_obj->user_login);
            SwpmLog::log_auth_debug("Setting current WP user to: " . $user_obj->user_login, true);
        } else {
            SwpmLog::log_auth_debug("wp_signon() failed for the corresponding WP user account.", false);
            if (is_wp_error($user_obj)) {
                //SwpmLog::log_auth_debug("Error Message: ". $user_obj->get_error_message(), false);
                $force_wp_user_sync = SwpmSettings::get_instance()->get_value('force-wp-user-sync');
                if (!empty($force_wp_user_sync)) {
                    //Force WP user login sync is enabled. Show error and exit out since the WP user login failed.
                    $error_msg = SwpmUtils::_("Error! This site has the force WP user login feature enabled in the settings. We could not find a WP user record for the given username: ") . $username;
                    $error_msg .= "<br /><br />" . SwpmUtils::_("This error is triggered when a member account doesn't have a corresponding WP user account. So the plugin fails to log the user into the WP User system.");
                    $error_msg .= "<br /><br />" . SwpmUtils::_("Contact the site admin and request them to check your username in the WP Users menu to see what happened with the WP user entry of your account.");
                    $error_msg .= "<br /><br />" . SwpmUtils::_("The site admin can disable the Force WP User Synchronization feature in the settings to disable this feature and this error will go away.");
                    $error_msg .= "<br /><br />" . SwpmUtils::_("You can use the back button of your browser to go back to the site.");
                    wp_die($error_msg);
                }
            }
        }

        $proceed_after_auth = apply_filters('swpm_login_auth_completed_filter', true);

        if (!$proceed_after_auth) {
            $auth = SwpmAuth::get_instance();
            $auth->logout();
            return;
        }

        SwpmLog::log_auth_debug("Triggering swpm_after_login hook.", true);
        do_action('swpm_after_login');
        if (!SwpmUtils::is_ajax()) {
            $redirect_url = apply_filters('swpm_after_login_redirect_url', SIMPLE_WP_MEMBERSHIP_SITE_HOME_URL);
            wp_redirect($redirect_url);
            exit(0);
        }
    }

    public function swpm_do_user_logout() {
        if (is_user_logged_in()) {
            wp_logout();
            wp_set_current_user(0);
        }
    }

    /* This function can be used to authenticate a member using currently logged in wp user. */
    public function set_current_user_handler() {
        $auth = SwpmAuth::get_instance();
        if ($auth->is_logged_in()) {
            return;
        }
        $user = wp_get_current_user();
        if (empty($user) || $user->ID === 0) {
            return false;
        }
        SwpmLog::log_auth_debug('set_current_user action. Attempting to login user ' . $user->user_login, true);
        //remove hook in order for it to not be called several times in the process
        remove_action('set_current_user', array($this, 'set_current_user_handler'));
        $auth->login_to_swpm_using_wp_user($user);
    }

    /* Used to log the user into SWPM system using the wp_login hook. Some social plugins use this hook to handle the login */
    public function wp_login_hook_handler($user_login, $user){
        SwpmLog::log_auth_debug('wp_login hook triggered. Username: ' . $user_login, true);
        $auth = SwpmAuth::get_instance();
        if ($auth->is_logged_in()) {
            //User is already logged-in. Nothing to do.
            return;
        }        
        $auth->login_to_swpm_using_wp_user($user);
    }
    
    public function wp_authenticate_handler($username, $password) {

        $auth = SwpmAuth::get_instance();
        if (($auth->is_logged_in() && ($auth->userData->user_name == $username))) {
            SwpmLog::log_auth_debug('wp_authenticate action. User with username: ' . $username . ' is already logged in.', true);
            return;
        }
        if (!empty($username)) {
            SwpmLog::log_auth_debug('wp_authenticate action. Handling login for username: ' . $username, true);
            $auth->login($username, $password, true);
        } else {
            //empty username can mean some plugin trying to login WP user using its own methods.
            //Let's add hook for set_current_user action and let it handle the login if needed.
            SwpmLog::log_auth_debug('wp_authenticate action. Empty username provided. Adding set_current_username hook to catch potential login attempt.', true);
            add_action('set_current_user', array($this, 'set_current_user_handler'));
        }
    }

    public function login() {
        ob_start();
        $auth = SwpmAuth::get_instance();
        if ($auth->is_logged_in()) {
            //Load the template for logged-in member
            SwpmUtilsTemplate::swpm_load_template('loggedin.php', false);
        } else {
            //Load the login widget template
            SwpmUtilsTemplate::swpm_load_template('login.php', false);
        }
        return ob_get_clean();
    }

    public function wp_logout() {
        $auth = SwpmAuth::get_instance();
        if ($auth->is_logged_in()) {
            $auth->logout();
        }
    }

    public function sync_with_wp_profile($wp_user_id) {
        global $wpdb;
        $wp_user_data = get_userdata($wp_user_id);
        $query = $wpdb->prepare("SELECT * FROM " . $wpdb->prefix . "swpm_members_tbl WHERE " . ' user_name=%s', $wp_user_data->user_login);
        $profile = $wpdb->get_row($query, ARRAY_A);
        $profile = (array) $profile;
        if (empty($profile)) {
            return;
        }
        $profile['user_name'] = $wp_user_data->user_login;
        $profile['email'] = $wp_user_data->user_email;
        $profile['password'] = $wp_user_data->user_pass;
        $profile['first_name'] = $wp_user_data->user_firstname;
        $profile['last_name'] = $wp_user_data->user_lastname;
        $wpdb->update($wpdb->prefix . "swpm_members_tbl", $profile, array('member_id' => $profile['member_id']));
    }

    function swpm_handle_wp_user_registration($user_id) {

        $swpm_settings_obj = SwpmSettings::get_instance();
        $enable_auto_create_swpm_members = $swpm_settings_obj->get_value('enable-auto-create-swpm-members');
        $default_level = $swpm_settings_obj->get_value('auto-create-default-membership-level');
        $default_ac_status = $swpm_settings_obj->get_value('auto-create-default-account-status');

        if (empty($enable_auto_create_swpm_members)) {
            return;
        }
        if (empty($default_level)) {
            return;
        }

        $user_info = get_userdata($user_id);
        if (SwpmMemberUtils::get_user_by_user_name($user_info->user_login)) {
            SwpmLog::log_simple_debug("swpm_handle_wp_user_registration() - SWPM member account with this username already exists! No new account will be created for this user.", false);
            return;
        }
        if (SwpmMemberUtils::get_user_by_email($user_info->user_email)) {
            SwpmLog::log_simple_debug("swpm_handle_wp_user_registration() - SWPM member account with this email already exists! No new account will be created for this user.", false);
            return;
        }
        $fields = array();
        $fields['user_name'] = $user_info->user_login;
        $fields['password'] = $user_info->user_pass;
        $fields['email'] = $user_info->user_email;
        $fields['first_name'] = $user_info->first_name;
        $fields['last_name'] = $user_info->last_name;
        $fields['membership_level'] = $default_level;
        $fields['member_since'] = date('Y-m-d');
        $fields['account_state'] = $default_ac_status;
        $fields['subscription_starts'] = date('Y-m-d');
        SwpmMemberUtils::create_swpm_member_entry_from_array_data($fields);
    }

    public function reset() {
        $succeeded = $this->notices();
        if ($succeeded) {
            return '';
        }
        ob_start();
        //Load the forgot password template
        SwpmUtilsTemplate::swpm_load_template('forgot_password.php', false);
        return ob_get_clean();
    }

    public function profile_form() {
        $auth = SwpmAuth::get_instance();
        $this->notices();
        if ($auth->is_logged_in()) {
            $out = apply_filters('swpm_profile_form_override', '');
            if (!empty($out)) {
                return $out;
            }
            ob_start();
            //Load the edit profile template
            SwpmUtilsTemplate::swpm_load_template('edit.php', false);
            return ob_get_clean();
        }
        return SwpmUtils::_('You are not logged in.');
    }

    /* If any message/notice was set during the execution then this function will output that message */

    public function notices() {
        $message = SwpmTransfer::get_instance()->get('status');
        $succeeded = false;
        if (empty($message)) {
            return false;
        }
        if ($message['succeeded']) {
            echo "<div id='swpm_message' class='swpm_success'>";
            $succeeded = true;
        } else {
            echo "<div id='swpm_message' class='swpm_error'>";
        }
        echo $message['message'];
        $extra = isset($message['extra']) ? $message['extra'] : array();
        if (is_string($extra)) {
            echo $extra;
        } else if (is_array($extra)) {
            echo '<ul>';
            foreach ($extra as $key => $value) {
                echo '<li>' . $value . '</li>';
            }
            echo '</ul>';
        }
        echo "</div>";
        if (isset($message['pass_reset_sent'])) {
            $succeeded = true;
        }
        return $succeeded;
    }

    /*
     * This function is hooked to WordPress's admin_notices action hook 
     * It is used to show any plugin specific notices/warnings in the admin interface
     */

    public function do_admin_notices() {
        $this->notices(); //Show any execution specific notices in the admin interface.
        //Show any other general warnings/notices to the admin.
        if (SwpmMiscUtils::is_swpm_admin_page()) {
            //we are in an admin page for SWPM plugin.

            $msg = '';
            //Show notice if running in sandbox mode.
            $settings = SwpmSettings::get_instance();
            $sandbox_enabled = $settings->get_value('enable-sandbox-testing');
            if ($sandbox_enabled) {
                $msg .= '<p>' . SwpmUtils::_('You have the sandbox payment mode enabled in plugin settings. Make sure to turn off the sandbox mode when you want to do live transactions.') . '</p>';
            }

            if (!empty($msg)) {//Show warning messages if any.
                echo '<div id="message" class="error">';
                echo $msg;
                echo '</div>';
            }
        }
    }

    public function meta_box() {
        if (function_exists('add_meta_box')) {
            $post_types = get_post_types();
            foreach ($post_types as $post_type => $post_type) {
                add_meta_box('swpm_sectionid', __('Simple WP Membership Protection', 'simple-membership'), array(&$this, 'inner_custom_box'), $post_type, 'advanced');
            }
        } else {//older version doesn't have custom post type so modification isn't needed.
            add_action('dbx_post_advanced', array(&$this, 'show_old_custom_box'));
            add_action('dbx_page_advanced', array(&$this, 'show_old_custom_box'));
        }
    }

    public function show_old_custom_box() {
        echo '<div class="dbx-b-ox-wrapper">' . "\n";
        echo '<fieldset id="swpm_fieldsetid" class="dbx-box">' . "\n";
        echo '<div class="dbx-h-andle-wrapper"><h3 class="dbx-handle">' .
        __('Simple Membership Protection options', 'simple-membership') . "</h3></div>";
        echo '<div class="dbx-c-ontent-wrapper"><div class="dbx-content">';
        // output editing form
        $this->inner_custom_box();
        // end wrapper
        echo "</div></div></fieldset></div>\n";
    }

    public function inner_custom_box() {
        global $post, $wpdb;
        $id = $post->ID;
        $protection_obj = SwpmProtection::get_instance();
        $is_protected = $protection_obj->is_protected($id);

        //Nonce input
        echo '<input type="hidden" name="swpm_post_protection_box_nonce" value="' . wp_create_nonce('swpm_post_protection_box_nonce_action') . '" />';

        // The actual fields for data entry
        echo '<h4>' . __("Do you want to protect this content?", 'simple-membership') . '</h4>';
        echo '<input type="radio" ' . ((!$is_protected) ? 'checked' : "") . '  name="swpm_protect_post" value="1" /> ' . SwpmUtils::_('No, Do not protect this content.') . '<br/>';
        echo '<input type="radio" ' . (($is_protected) ? 'checked' : "") . '  name="swpm_protect_post" value="2" /> ' . SwpmUtils::_('Yes, Protect this content.') . '<br/>';
        echo $protection_obj->get_last_message();

        echo '<h4>' . __("Select the membership level that can access this content:", 'simple-membership') . "</h4>";
        $query = "SELECT * FROM " . $wpdb->prefix . "swpm_membership_tbl WHERE  id !=1 ";
        $levels = $wpdb->get_results($query, ARRAY_A);
        foreach ($levels as $level) {
            echo '<input type="checkbox" ' . (SwpmPermission::get_instance($level['id'])->is_permitted($id) ? "checked='checked'" : "") .
            ' name="swpm_protection_level[' . $level['id'] . ']" value="' . $level['id'] . '" /> ' . $level['alias'] . "<br/>";
        }
    }

    public function save_postdata($post_id) {
        global $wpdb;
        $post_type = filter_input(INPUT_POST, 'post_type');
        $swpm_protect_post = filter_input(INPUT_POST, 'swpm_protect_post');

        if (wp_is_post_revision($post_id)) {
            return;
        }
        if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) {
            return $post_id;
        }

        //Check nonce
        $swpm_post_protection_box_nonce = filter_input(INPUT_POST, 'swpm_post_protection_box_nonce');
        if (!wp_verify_nonce($swpm_post_protection_box_nonce, 'swpm_post_protection_box_nonce_action')) {
            //Nonce check failed.
            return $post_id;
        }

        if ('page' == $post_type) {
            if (!current_user_can('edit_page', $post_id)) {
                return $post_id;
            }
        } else {
            if (!current_user_can('edit_post', $post_id)) {
                return $post_id;
            }
        }
        if (empty($swpm_protect_post)) {
            return;
        }
        // OK, we're authenticated: we need to find and save the data
        $isprotected = ($swpm_protect_post == 2);
        $args = array('swpm_protection_level' => array(
                'filter' => FILTER_VALIDATE_INT,
                'flags' => FILTER_REQUIRE_ARRAY,
        ));
        $swpm_protection_level = filter_input_array(INPUT_POST, $args);
        $swpm_protection_level = $swpm_protection_level['swpm_protection_level'];
        if (!empty($post_type)) {
            if ($isprotected) {
                SwpmProtection::get_instance()->apply(array($post_id), $post_type);
            } else {
                SwpmProtection::get_instance()->remove(array($post_id), $post_type);
            }
            SwpmProtection::get_instance()->save();
            $query = "SELECT id FROM " . $wpdb->prefix . "swpm_membership_tbl WHERE  id !=1 ";
            $level_ids = $wpdb->get_col($query);
            foreach ($level_ids as $level) {
                if (isset($swpm_protection_level[$level])) {
                    SwpmPermission::get_instance($level)->apply(array($post_id), $post_type)->save();
                } else {
                    SwpmPermission::get_instance($level)->remove(array($post_id), $post_type)->save();
                }
            }
        }
        $enable_protection = array();
        $enable_protection['protect'] = $swpm_protect_post;
        $enable_protection['level'] = $swpm_protection_level;
        return $enable_protection;
    }

    public function filter_comment($content) {
        if (is_admin()) {
            //Do not apply filtering for admin side viewing
            return $content;
        }

        $acl = SwpmAccessControl::get_instance();
        global $comment;
        return $acl->filter_comment($comment, $content);
    }

    public function filter_content($content) {
        if (is_preview() || is_admin()) {
            //Do not apply filtering for admin side viewing or preview page viewing.
            return $content;
        }
        $acl = SwpmAccessControl::get_instance();
        global $post;
        return $acl->filter_post($post, $content);
    }

    public function init_hook() {
        $init_tasks = new SwpmInitTimeTasks();
        $init_tasks->do_init_tasks();
    }

    public function handle_wp_loaded_tasks() {
        $wp_loaded_tasks = new SwpmWpLoadedTasks();
        $wp_loaded_tasks->do_wp_loaded_tasks();
    }

    public function admin_library() {
        //Only loaded on selective swpm admin menu page rendering.
        $this->common_library();
        wp_enqueue_script('password-strength-meter');
        wp_enqueue_script('swpm.password-meter', SIMPLE_WP_MEMBERSHIP_URL . '/js/swpm.password-meter.js', array('jquery'));
        //jQuery UI style
        wp_register_style('swpm-jquery-ui', SIMPLE_WP_MEMBERSHIP_URL . '/css/jquery-ui.min.css');
        wp_enqueue_style('swpm-jquery-ui');
        wp_enqueue_script('jquery-ui-datepicker');
        $settings = array('statusChangeEmailHead' => SwpmSettings::get_instance()->get_value('account-change-email-subject'),
            'statusChangeEmailBody' => SwpmSettings::get_instance()->get_value('account-change-email-body'));
        wp_localize_script('swpm.password-meter', 'SwpmSettings', $settings);
    }

    public function front_library() {
        $this->common_library();
    }

    private function common_library() {
        wp_enqueue_script('jquery');
        wp_enqueue_style('swpm.common', SIMPLE_WP_MEMBERSHIP_URL . '/css/swpm.common.css');

        //In order to not clog WP with scripts and styles we're only using with forms, let's just register those for now
        //Scripts will be queued when forms are actually displayed
        wp_register_style('validationEngine.jquery', SIMPLE_WP_MEMBERSHIP_URL . '/css/validationEngine.jquery.css');
        wp_register_script('jquery.validationEngine', SIMPLE_WP_MEMBERSHIP_URL . '/js/jquery.validationEngine.js', array('jquery'));
        wp_register_script('jquery.validationEngine-en', SIMPLE_WP_MEMBERSHIP_URL . '/js/jquery.validationEngine-en.js', array('jquery'));
        wp_register_script('swpm.validationEngine-localization', SIMPLE_WP_MEMBERSHIP_URL . '/js/swpm.validationEngine-localization.js', array('jquery'));
    }

    public static function enqueue_validation_scripts($add_params = array()) {
        //Localization for jquery.validationEngine
        //This array will be merged with $.validationEngineLanguage.allRules object from jquery.validationEngine-en.js file
        $loc_data = array(
            'ajaxUserCall' => array(
                'url' => admin_url('admin-ajax.php'),
                'alertTextLoad' => '* ' . SwpmUtils::_('Validating, please wait'),
            ),
            'ajaxEmailCall' => array(
                'url' => admin_url('admin-ajax.php'),
                'alertTextLoad' => '* ' . SwpmUtils::_('Validating, please wait'),
            ),
            'email' => array(
                'alertText' => '* ' . SwpmUtils::_('Invalid email address'),
            ),
            'required' => array(
                'alertText' => '* ' . SwpmUtils::_('This field is required'),
            ),
            'strongPass' => array(
                'alertText' => '* ' . SwpmUtils::_('Password must contain at least:').'<br>'.SwpmUtils::_('- a digit').'<br>'.SwpmUtils::_('- an uppercase letter').'<br>'.SwpmUtils::_('- a lowercase letter'),
            ),
            'SWPMUserName' => array(
                'alertText' => '* ' . SwpmUtils::_('Invalid Username').'<br>'.SwpmUtils::_('Usernames can only contain: letters, numbers and .-_*@'),
            ),            
            'minSize' => array(
                'alertText' => '* ' . SwpmUtils::_('Minimum '),
                'alertText2' => SwpmUtils::_(' characters required'),
            ),
            'noapostrophe' => array(
                'alertText' => '* ' . SwpmUtils::_('Apostrophe character is not allowed'),
            ),
        );

        $nonce=wp_create_nonce( 'swpm-rego-form-ajax-nonce' );

        if ($add_params) {
            // Additional parameters should be added to the array, replacing existing ones
            if (isset($add_params['ajaxEmailCall'])) {
                if (isset($add_params['ajaxEmailCall']['extraData'])) {
                    $add_params['ajaxEmailCall']['extraData'].='&nonce='.$nonce;
                }
            }
            $loc_data = array_replace_recursive($add_params, $loc_data);
        }

        wp_localize_script('swpm.validationEngine-localization', 'swpm_validationEngine_localization', $loc_data);

        wp_localize_script('jquery.validationEngine-en', 'swpmRegForm', array('nonce' => $nonce));

        wp_enqueue_style('validationEngine.jquery');
        wp_enqueue_script('jquery.validationEngine');
        wp_enqueue_script('jquery.validationEngine-en');
        wp_enqueue_script('swpm.validationEngine-localization');
    }

    public function registration_form($atts) {
        $succeeded = $this->notices();
        if ($succeeded) {
            return;
        }
        $is_free = SwpmSettings::get_instance()->get_value('enable-free-membership');
        $free_level = absint(SwpmSettings::get_instance()->get_value('free-membership-id'));
        $level = isset($atts['level']) ? absint($atts['level']) : ($is_free ? $free_level : null);
        return SwpmFrontRegistration::get_instance()->regigstration_ui($level);
    }

    public function menu() {
        $menu_parent_slug = 'simple_wp_membership';

        add_menu_page(__("WP Membership", 'simple-membership'), __("WP Membership", 'simple-membership'), SWPM_MANAGEMENT_PERMISSION, $menu_parent_slug, array(&$this, "admin_members_menu"), 'dashicons-id');
        add_submenu_page($menu_parent_slug, __("Members", 'simple-membership'), __('Members', 'simple-membership'), SWPM_MANAGEMENT_PERMISSION, 'simple_wp_membership', array(&$this, "admin_members_menu"));
        add_submenu_page($menu_parent_slug, __("Membership Levels", 'simple-membership'), __("Membership Levels", 'simple-membership'), SWPM_MANAGEMENT_PERMISSION, 'simple_wp_membership_levels', array(&$this, "admin_membership_levels_menu"));
        add_submenu_page($menu_parent_slug, __("Settings", 'simple-membership'), __("Settings", 'simple-membership'), SWPM_MANAGEMENT_PERMISSION, 'simple_wp_membership_settings', array(&$this, "admin_settings_menu"));
        add_submenu_page($menu_parent_slug, __("Payments", 'simple-membership'), __("Payments", 'simple-membership'), SWPM_MANAGEMENT_PERMISSION, 'simple_wp_membership_payments', array(&$this, "admin_payments_menu"));
        add_submenu_page($menu_parent_slug, __("Add-ons", 'simple-membership'), __("Add-ons", 'simple-membership'), SWPM_MANAGEMENT_PERMISSION, 'simple_wp_membership_addons', array(&$this, "admin_add_ons_menu"));

        do_action('swpm_after_main_admin_menu', $menu_parent_slug);

        $this->meta_box();
    }

    /* Render the members menu in admin dashboard */

    public function admin_members_menu() {
        include_once(SIMPLE_WP_MEMBERSHIP_PATH . 'classes/class.swpm-members.php');
        $members = new SwpmMembers();
        $members->handle_main_members_admin_menu();
    }

    /* Render the membership levels menu in admin dashboard */

    public function admin_membership_levels_menu() {
        include_once(SIMPLE_WP_MEMBERSHIP_PATH . 'classes/class.swpm-membership-levels.php');
        $levels = new SwpmMembershipLevels();
        $levels->handle_main_membership_level_admin_menu();
    }

    /* Render the settings menu in admin dashboard */

    public function admin_settings_menu() {
        $settings = SwpmSettings::get_instance();
        $settings->handle_main_settings_admin_menu();
    }

    public function admin_payments_menu() {
        include_once(SIMPLE_WP_MEMBERSHIP_PATH . 'classes/admin-includes/class.swpm-payments-admin-menu.php');
        $payments_admin = new SwpmPaymentsAdminMenu();
        $payments_admin->handle_main_payments_admin_menu();
    }

    public function admin_add_ons_menu() {
        include(SIMPLE_WP_MEMBERSHIP_PATH . 'views/admin_add_ons_page.php');
    }

    public function plugins_loaded() {
        //Runs when plugins_loaded action gets fired
        if (is_admin()) {
            //Check and run DB upgrade operation (if needed)
            if (get_option('swpm_db_version') != SIMPLE_WP_MEMBERSHIP_DB_VER) {
                include_once('class.swpm-installation.php');
                SwpmInstallation::run_safe_installer();
            }
        }
    }

    public static function activate() {
        wp_schedule_event(time(), 'daily', 'swpm_account_status_event');
        wp_schedule_event(time(), 'daily', 'swpm_delete_pending_account_event');
        include_once('class.swpm-installation.php');
        SwpmInstallation::run_safe_installer();
    }

    public static function deactivate() {
        wp_clear_scheduled_hook('swpm_account_status_event');
        wp_clear_scheduled_hook('swpm_delete_pending_account_event');
    }

}
