class.ilForumSettingsGUI.php

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<?php
/* Copyright (c) 1998-2017 ILIAS open source, Extended GPL, see docs/LICENSE */

class ilForumSettingsGUI
{
    private $ctrl;
    private $tpl;
    private $lng;
    private $settings;
    private $tabs;
    private $access;
    private $tree;
    private $parent_obj;
    
    protected $form;

    private $notificationSettingsForm;
    
    public function __construct(ilObjForumGUI $parent_obj)
    {
        global $DIC;
        
        $this->parent_obj = $parent_obj;
        $this->ctrl = $DIC->ctrl();
        $this->tpl = $DIC->ui()->mainTemplate();
        $this->lng = $DIC->language();
        $this->settings = $DIC->settings();
        $this->tabs = $DIC->tabs();
        $this->access = $DIC->access();
        $this->tree = $DIC->repositoryTree();
        $this->obj_service = $DIC->object();
    }

    public function executeCommand()
    {
        $cmd = $this->ctrl->getCmd();
        switch (true) {
            case method_exists($this, $cmd):
                $this->settingsTabs();
                $this->{$cmd}();
                break;

            default:
                $this->ctrl->redirect($this->parent_obj);
                break;
        }
    }

    public function getCustomForm(&$a_form)
    {
        $this->settingsTabs();
        $this->tabs->activateSubTab("basic_settings");
        $a_form->setTitle($this->lng->txt('frm_settings_form_header'));

        $presentationHeader = new ilFormSectionHeaderGUI();
        $presentationHeader->setTitle($this->lng->txt('frm_settings_presentation_header'));
        $a_form->addItem($presentationHeader);

        $this->obj_service->commonSettings()->legacyForm($a_form, $this->parent_obj->object)->addTileImage();

        $rg_pro = new ilRadioGroupInputGUI($this->lng->txt('frm_default_view'), 'default_view');
        $rg_pro->addOption(new ilRadioOption($this->lng->txt('sort_by_posts'), ilForumProperties::VIEW_TREE));
        $rg_sort_by_date = new ilRadioOption($this->lng->txt('sort_by_date'), ilForumProperties::VIEW_DATE);
        $rg_pro->addOption($rg_sort_by_date);
        $view_direction_group_gui = new ilRadioGroupInputGUI('', 'default_view_sort_dir');
        $view_desc = new ilRadioOption($this->lng->txt('descending_order'), ilForumProperties::VIEW_DATE_DESC);
        $view_asc = new ilRadioOption($this->lng->txt('ascending_order'), ilForumProperties::VIEW_DATE_ASC);
        $view_direction_group_gui->addOption($view_desc);
        $view_direction_group_gui->addOption($view_asc);
        $rg_sort_by_date->addSubItem($view_direction_group_gui);
        $a_form->addItem($rg_pro);

        $userFunctionsHeader = new \ilFormSectionHeaderGUI();
        $userFunctionsHeader->setTitle($this->lng->txt('frm_settings_user_functions_header'));
        $a_form->addItem($userFunctionsHeader);

        $frm_subject = new ilRadioGroupInputGUI($this->lng->txt('frm_subject_setting'), 'subject_setting');
        $frm_subject->addOption(new ilRadioOption($this->lng->txt('preset_subject'), 'preset_subject'));
        $frm_subject->addOption(new ilRadioOption($this->lng->txt('add_re_to_subject'), 'add_re_to_subject'));
        $frm_subject->addOption(new ilRadioOption($this->lng->txt('empty_subject'), 'empty_subject'));
        $a_form->addItem($frm_subject);

        $cb_prop = new ilCheckboxInputGUI($this->lng->txt('enable_thread_ratings'), 'thread_rating');
        $cb_prop->setValue(1);
        $cb_prop->setInfo($this->lng->txt('enable_thread_ratings_info'));
        $a_form->addItem($cb_prop);

        if (!ilForumProperties::isFileUploadGloballyAllowed()) {
            $frm_upload = new ilCheckboxInputGUI($this->lng->txt('file_upload_allowed'), 'file_upload_allowed');
            $frm_upload->setValue(1);
            $frm_upload->setInfo($this->lng->txt('allow_file_upload_desc'));
            $a_form->addItem($frm_upload);
        }

        $moderatorFunctionsHeader = new \ilFormSectionHeaderGUI();
        $moderatorFunctionsHeader->setTitle($this->lng->txt('frm_settings_mod_functions_header'));
        $a_form->addItem($moderatorFunctionsHeader);

        $cb_prop = new ilCheckboxInputGUI($this->lng->txt('activate_new_posts'), 'post_activation');
        $cb_prop->setValue(1);
        $cb_prop->setInfo($this->lng->txt('post_activation_desc'));
        $a_form->addItem($cb_prop);

        $cb_prop = new ilCheckboxInputGUI($this->lng->txt('mark_moderator_posts'), 'mark_mod_posts');
        $cb_prop->setValue(1);
        $cb_prop->setInfo($this->lng->txt('mark_moderator_posts_desc'));
        $a_form->addItem($cb_prop);

        
        $stickyThreadSorting = new ilRadioGroupInputGUI($this->lng->txt('sorting_manual_sticky'), 'thread_sorting');
        $latestAtTop = new ilRadioOption($this->lng->txt('frm_sticky_threads_latest_at_top'), 0);
        $latestAtTop->setInfo($this->lng->txt('frm_sticky_threads_latest_at_top_info'));
        $latestAtTop->setValue(0);
        $stickyThreadSorting->addOption($latestAtTop);
        $manualSorting = new ilRadioOption($this->lng->txt('frm_sticky_threads_manual_sorting'), 1);
        $manualSorting->setInfo($this->lng->txt('frm_sticky_threads_manual_sorting_info'));
        $stickyThreadSorting->addOption($manualSorting);
        $a_form->addItem($stickyThreadSorting);

        if ($this->settings->get('enable_anonymous_fora') || $this->settings->get('enable_fora_statistics', false)) {
            $privacyHeader = new \ilFormSectionHeaderGUI();
            $privacyHeader->setTitle($this->lng->txt('frm_settings_privacy_header'));
            $a_form->addItem($privacyHeader);
        }

        if ($this->settings->get('enable_fora_statistics', false)) {
            $cb_prop = new ilCheckboxInputGUI($this->lng->txt('frm_statistics_enabled'), 'statistics_enabled');
            $cb_prop->setValue(1);
            $cb_prop->setInfo($this->lng->txt('frm_statistics_enabled_desc'));
            $a_form->addItem($cb_prop);
        }

        if ($this->settings->get('enable_anonymous_fora') || $this->parent_obj->objProperties->isAnonymized()) {
            $cb_prop = new ilCheckboxInputGUI($this->lng->txt('frm_anonymous_posting'), 'anonymized');
            $cb_prop->setValue(1);
            $cb_prop->setInfo($this->lng->txt('frm_anonymous_posting_desc'));
            $a_form->addItem($cb_prop);
        }
    }
    
    public function settingsTabs()
    {
        $this->tabs->activateTab('settings');
        $this->tabs->addSubTabTarget('basic_settings', $this->ctrl->getLinkTarget($this->parent_obj, 'edit'), '', ['ilobjforumgui', 'ilObjForumGUI']);

        if ($this->settings->get('forum_notification') > 0) {
            // check if there a parent-node is a grp or crs
            $grp_ref_id = $this->tree->checkForParentType($this->parent_obj->ref_id, 'grp');
            $crs_ref_id = $this->tree->checkForParentType($this->parent_obj->ref_id, 'crs');
            
            if ((int) $grp_ref_id > 0 || (int) $crs_ref_id > 0) {
                #show member-tab for notification if forum-notification is enabled in administration
                if ($this->access->checkAccess('write', '', $this->parent_obj->ref_id)) {
                    $mem_active = array('showMembers', 'forums_notification_settings');
                    (in_array($_GET['cmd'], $mem_active)) ? $force_mem_active = true : $force_mem_active = false;

                    $this->tabs->addSubTabTarget('notifications', $this->ctrl->getLinkTarget($this, 'showMembers'), '', '', '', $force_mem_active);
                }
            }
        }

        $this->lng->loadLanguageModule('cont');
        $this->tabs->addSubTabTarget('cont_news_settings', $this->ctrl->getLinkTargetByClass('ilcontainernewssettingsgui'), '', 'ilcontainernewssettingsgui');

        return true;
    }

    public function getCustomValues(array &$a_values)
    {
        $a_values['default_view'] = $this->parent_obj->objProperties->getDefaultView();
        $a_values['anonymized'] = $this->parent_obj->objProperties->isAnonymized();
        $a_values['statistics_enabled'] = $this->parent_obj->objProperties->isStatisticEnabled();
        $a_values['post_activation'] = $this->parent_obj->objProperties->isPostActivationEnabled();
        $a_values['subject_setting'] = $this->parent_obj->objProperties->getSubjectSetting();
        $a_values['mark_mod_posts'] = $this->parent_obj->objProperties->getMarkModeratorPosts();
        $a_values['thread_sorting'] = $this->parent_obj->objProperties->getThreadSorting();
        $a_values['thread_rating'] = $this->parent_obj->objProperties->isIsThreadRatingEnabled();
        
        $default_view = (int) $this->parent_obj->objProperties->getDefaultView() > ilForumProperties::VIEW_TREE
            ? ilForumProperties::VIEW_DATE
            : ilForumProperties::VIEW_TREE;
        
        $default_view_sort_dir = (int) $this->parent_obj->objProperties->getDefaultView() > ilForumProperties::VIEW_DATE_ASC
            ? ilForumProperties::VIEW_DATE_DESC
            : ilForumProperties::VIEW_DATE_ASC;

        $a_values['default_view'] = $default_view;
        $a_values['default_view_sort_dir'] = $default_view_sort_dir;
        $a_values['file_upload_allowed'] = (bool) $this->parent_obj->objProperties->getFileUploadAllowed();
    }
    
    public function updateCustomValues(ilPropertyFormGUI $a_form)
    {
        $default_view = (int) $a_form->getInput('default_view') > ilForumProperties::VIEW_TREE
            ? ilForumProperties::VIEW_DATE
            : ilForumProperties::VIEW_TREE;
        
        if ($default_view == ilForumProperties::VIEW_DATE) {
            (int) $a_form->getInput('default_view_sort_dir') > ilForumProperties::VIEW_DATE_ASC
                ? $default_view = ilForumProperties::VIEW_DATE_DESC
                : $default_view = ilForumProperties::VIEW_DATE_ASC;
        }
        
        $this->parent_obj->objProperties->setDefaultView($default_view);
        
        // BUGFIX FOR 11271
        if (isset($_SESSION['viewmode'])) {
            $_SESSION['viewmode'] = $default_view;
        }
        
        if ($this->settings->get('enable_anonymous_fora') || $this->parent_obj->objProperties->isAnonymized()) {
            $this->parent_obj->objProperties->setAnonymisation((int) $a_form->getInput('anonymized'));
        }
        if ($this->settings->get('enable_fora_statistics', false)) {
            $this->parent_obj->objProperties->setStatisticsStatus((int) $a_form->getInput('statistics_enabled'));
        }
        $this->parent_obj->objProperties->setPostActivation((int) $a_form->getInput('post_activation'));
        $this->parent_obj->objProperties->setSubjectSetting($a_form->getInput('subject_setting'));
        $this->parent_obj->objProperties->setMarkModeratorPosts((int) $a_form->getInput('mark_mod_posts'));
        $this->parent_obj->objProperties->setThreadSorting((int) $a_form->getInput('thread_sorting'));
        $this->parent_obj->objProperties->setIsThreadRatingEnabled((bool) $a_form->getInput('thread_rating'));
        if (!ilForumProperties::isFileUploadGloballyAllowed()) {
            $this->parent_obj->objProperties->setFileUploadAllowed((bool) $a_form->getInput('file_upload_allowed'));
        }
        $this->parent_obj->objProperties->update();
        $this->obj_service->commonSettings()->legacyForm($a_form, $this->parent_obj->object)->saveTileImage();
    }

    public function showMembers()
    {
        if (!$this->access->checkAccess('write', '', $this->parent_obj->ref_id)) {
            $this->parent_obj->error->raiseError($this->lng->txt('msg_no_perm_read'), $this->parent_obj->error->MESSAGE);
        }

        $this->tpl->addBlockFile('ADM_CONTENT', 'adm_content', 'tpl.forums_members_list.html', 'Modules/Forum');

        // instantiate the property form
        if (!$this->initNotificationSettingsForm()) {
            // if the form was just created set the values fetched from database
            $this->notificationSettingsForm->setValuesByArray(array(
                'notification_type' => $this->parent_obj->objProperties->getNotificationType(),
                'adm_force' => (bool) $this->parent_obj->objProperties->isAdminForceNoti(),
                'usr_toggle' => (bool) $this->parent_obj->objProperties->isUserToggleNoti()
            ));
        }

        // set form html into template
        $this->tpl->setVariable('NOTIFICATIONS_SETTINGS_FORM', $this->notificationSettingsForm->getHTML());

        $frm_noti = new ilForumNotification($this->parent_obj->object->getRefId());
        $oParticipants = $this->getParticipants();

        $moderator_ids = ilForum::_getModerators($this->parent_obj->object->getRefId());

        $admin_ids = $oParticipants->getAdmins();
        $member_ids = $oParticipants->getMembers();
        $tutor_ids = $oParticipants->getTutors();

        if ($this->parent_obj->objProperties->getNotificationType() == 'default') {
            // update forum_notification table
            $forum_noti = new ilForumNotification($this->parent_obj->object->getRefId());
            $forum_noti->setAdminForce($this->parent_obj->objProperties->isAdminForceNoti());
            $forum_noti->setUserToggle($this->parent_obj->objProperties->isUserToggleNoti());
            $forum_noti->setForumId($this->parent_obj->objProperties->getObjId());
        } elseif ($this->parent_obj->objProperties->getNotificationType() == 'per_user') {
            $moderators = $this->getUserNotificationTableData($moderator_ids, $frm_noti);
            $admins = $this->getUserNotificationTableData($admin_ids, $frm_noti);
            $members = $this->getUserNotificationTableData($member_ids, $frm_noti);
            $tutors = $this->getUserNotificationTableData($tutor_ids, $frm_noti);

            $this->__showMembersTable($moderators, $admins, $members, $tutors);
        }
    }

    protected function getIcon($user_toggle_noti)
    {
        $icon = $user_toggle_noti
            ? "<img src=\"" . ilUtil::getImagePath("icon_ok.svg") . "\" alt=\"" . $this->lng->txt("enabled") . "\" title=\"" . $this->lng->txt("enabled") . "\" border=\"0\" vspace=\"0\"/>"
            : "<img src=\"" . ilUtil::getImagePath("icon_not_ok.svg") . "\" alt=\"" . $this->lng->txt("disabled") . "\" title=\"" . $this->lng->txt("disabled") . "\" border=\"0\" vspace=\"0\"/>";
        return $icon;
    }

    private function getUserNotificationTableData($user_ids, ilForumNotification $frm_noti)
    {
        $counter = 0;
        $users = array();
        foreach ($user_ids as $user_id) {
            $frm_noti->setUserId($user_id);
            $user_toggle_noti = $frm_noti->isUserToggleNotification();
            $icon_ok = $this->getIcon(!$user_toggle_noti);

            $users[$counter]['user_id'] = ilUtil::formCheckbox(0, 'user_id[]', $user_id);
            $users[$counter]['login'] = ilObjUser::_lookupLogin($user_id);
            $name = ilObjUser::_lookupName($user_id);
            $users[$counter]['firstname'] = $name['firstname'];
            $users[$counter]['lastname'] = $name['lastname'];
            $users[$counter]['user_toggle_noti'] = $icon_ok;
            $counter++;
        }
        return $users;
    }

    private function __showMembersTable(array $moderators, array $admins, array $members, array $tutors)
    {
        foreach (array_filter([
                    'moderators' => $moderators,
                    'administrator' => $admins,
                    'tutors' => $tutors,
                    'members' => $members
                ]) as $type => $data) {
            $tbl_mod = new ilTable2GUI($this, 'showMembers');
            $tbl_mod->setId('tbl_id_mod');
            $tbl_mod->setFormAction($this->ctrl->getFormAction($this, 'showMembers'));
            $tbl_mod->setTitle($this->lng->txt(strtolower($type)));

            $tbl_mod->addColumn('', '', '1%', true);
            $tbl_mod->addColumn($this->lng->txt('login'), '', '10%');
            $tbl_mod->addColumn($this->lng->txt('firstname'), '', '10%');
            $tbl_mod->addColumn($this->lng->txt('lastname'), '', '10%');
            $tbl_mod->addColumn($this->lng->txt('allow_user_toggle_noti'), '', '10%');
            $tbl_mod->setSelectAllCheckbox('user_id');

            $tbl_mod->setRowTemplate('tpl.forums_members_row.html', 'Modules/Forum');
            $tbl_mod->setData($data);

            $tbl_mod->addMultiCommand('enableHideUserToggleNoti', $this->lng->txt('enable_hide_user_toggle'));
            $tbl_mod->addMultiCommand('disableHideUserToggleNoti', $this->lng->txt('disable_hide_user_toggle'));

            $this->tpl->setCurrentBlock(strtolower($type) . '_table');
            $this->tpl->setVariable(strtoupper($type), $tbl_mod->getHTML());
        }
    }

    public function enableAdminForceNoti()
    {
        if (!$this->access->checkAccess('write', '', $this->parent_obj->ref_id)) {
            $this->parent_obj->error->raiseError($this->lng->txt('msg_no_perm_read'), $this->parent_obj->error->MESSAGE);
        }

        if (!isset($_POST['user_id']) || !is_array($_POST['user_id'])) {
            ilUtil::sendInfo($this->lng->txt('time_limit_no_users_selected'), true);
        } else {
            $frm_noti = new ilForumNotification($this->parent_obj->object->getRefId());

            foreach ($_POST['user_id'] as $user_id) {
                $frm_noti->setUserId((int) $user_id);
                $is_enabled = $frm_noti->isAdminForceNotification();

                $frm_noti->setUserToggle(0);
                if (!$is_enabled) {
                    $frm_noti->setAdminForce(1);
                    $frm_noti->insertAdminForce();
                }
            }

            ilUtil::sendSuccess($this->lng->txt('saved_successfully'));
        }

        $this->showMembers();
    }

    public function disableAdminForceNoti()
    {
        if (!$this->access->checkAccess('write', '', $this->parent_obj->ref_id)) {
            $this->parent_obj->error->raiseError($this->lng->txt('msg_no_perm_read'), $this->parent_obj->error->MESSAGE);
        }

        if (!isset($_POST['user_id']) || !is_array($_POST['user_id'])) {
            ilUtil::sendInfo($this->lng->txt('time_limit_no_users_selected'));
        } else {
            $frm_noti = new ilForumNotification($this->parent_obj->object->getRefId());

            foreach ($_POST['user_id'] as $user_id) {
                $frm_noti->setUserId((int) $user_id);
                $is_enabled = $frm_noti->isAdminForceNotification();

                if ($is_enabled) {
                    $frm_noti->deleteAdminForce();
                }
            }

            ilUtil::sendSuccess($this->lng->txt('saved_successfully'));
        }

        $this->showMembers();
    }

    public function enableHideUserToggleNoti()
    {
        if (!$this->access->checkAccess('write', '', $this->parent_obj->ref_id)) {
            $this->parent_obj->error->raiseError($this->lng->txt('msg_no_perm_read'), $this->parent_obj->error->MESSAGE);
        }
        if (!isset($_POST['user_id']) || !is_array($_POST['user_id'])) {
            ilUtil::sendInfo($this->lng->txt('time_limit_no_users_selected'));
        } else {
            $frm_noti = new ilForumNotification($this->parent_obj->object->getRefId());

            foreach ($_POST['user_id'] as $user_id) {
                $frm_noti->setUserId((int) $user_id);
                $is_enabled = $frm_noti->isAdminForceNotification();
                $frm_noti->setUserToggle(1);

                if (!$is_enabled) {
                    $frm_noti->setAdminForce(1);
                    $frm_noti->insertAdminForce();
                } else {
                    $frm_noti->updateUserToggle();
                }
            }

            ilUtil::sendSuccess($this->lng->txt('saved_successfully'));
        }

        $this->showMembers();
    }

    public function disableHideUserToggleNoti()
    {
        if (!$this->access->checkAccess('write', '', $this->parent_obj->ref_id)) {
            $this->parent_obj->error->raiseError($this->lng->txt('msg_no_perm_read'), $this->parent_obj->error->MESSAGE);
        }

        if (!isset($_POST['user_id']) || !is_array($_POST['user_id'])) {
            ilUtil::sendInfo($this->lng->txt('time_limit_no_users_selected'));
        } else {
            $frm_noti = new ilForumNotification($this->parent_obj->object->getRefId());

            foreach ($_POST['user_id'] as $user_id) {
                $frm_noti->setUserId((int) $user_id);
                $is_enabled = $frm_noti->isAdminForceNotification();
                $frm_noti->setUserToggle(0);
                if ($is_enabled) {
                    $frm_noti->updateUserToggle();
                } else {
                    $frm_noti->setAdminForce(1);
                    $frm_noti->insertAdminForce();
                }
            }

            ilUtil::sendSuccess($this->lng->txt('saved_successfully'));
        }

        $this->showMembers();
    }



    public function getParticipants()
    {
        if ($this->parent_obj->isParentObjectCrsOrGrp() == false) {
            $this->parent_obj->error->raiseError($this->lng->txt('msg_no_perm_read'), $this->parent_obj->error->MESSAGE);
        }

        $oParticipants = null;

        $grp_ref_id = $this->tree->checkForParentType($this->parent_obj->object->getRefId(), 'grp');
        $crs_ref_id = $this->tree->checkForParentType($this->parent_obj->object->getRefId(), 'crs');
        if ($grp_ref_id > 0) {
            $parent_obj = ilObjectFactory::getInstanceByRefId($grp_ref_id);
            $oParticipants = ilGroupParticipants::_getInstanceByObjId($parent_obj->getId());
            return $oParticipants;
        } elseif ($crs_ref_id > 0) {
            $parent_obj = ilObjectFactory::getInstanceByRefId($crs_ref_id);

            $oParticipants = ilCourseParticipants::_getInstanceByObjId($parent_obj->getId());
            return $oParticipants;
        }

        return $oParticipants;
    }



    private function updateUserNotifications($update_all_users = false)
    {
        $oParticipants = $this->getParticipants();

        $frm_noti = new ilForumNotification($this->parent_obj->object->getRefId());
        $moderator_ids = ilForum::_getModerators($this->parent_obj->object->getRefId());

        $admin_ids = $oParticipants->getAdmins();
        $member_ids = $oParticipants->getMembers();
        $tutor_ids = $oParticipants->getTutors();

        $all_forum_users = array_merge($moderator_ids, $admin_ids, $member_ids, $tutor_ids);
        $all_forum_users = array_unique($all_forum_users);

        $all_notis = $frm_noti->read();

        foreach ($all_forum_users as $user_id) {
            $frm_noti->setUserId($user_id);

            $frm_noti->setAdminForce(1);
            $frm_noti->setUserToggle($this->parent_obj->objProperties->isUserToggleNoti());

            if (array_key_exists($user_id, $all_notis) && $update_all_users) {
                $frm_noti->update();
            } elseif ($frm_noti->existsNotification() == false) {
                $frm_noti->insertAdminForce();
            }
        }
    }

    private function initNotificationSettingsForm()
    {
        if (null === $this->notificationSettingsForm) {
            $form = new ilPropertyFormGUI();
            $form->setFormAction($this->ctrl->getFormAction($this, 'updateNotificationSettings'));
            $form->setTitle($this->lng->txt('forums_notification_settings'));

            $radio_grp = new ilRadioGroupInputGUI('', 'notification_type');
            $radio_grp->setValue('default');

            $opt_default = new ilRadioOption($this->lng->txt("user_decides_notification"), 'default');
            $opt_0 = new ilRadioOption($this->lng->txt("settings_for_all_members"), 'all_users');
            $opt_1 = new ilRadioOption($this->lng->txt("settings_per_users"), 'per_user');

            $radio_grp->addOption($opt_default);
            $radio_grp->addOption($opt_0);
            $radio_grp->addOption($opt_1);

            $chb_2 = new ilCheckboxInputGUI($this->lng->txt('user_toggle_noti'), 'usr_toggle');
            $chb_2->setValue(1);

            $opt_0->addSubItem($chb_2);
            $form->addItem($radio_grp);

            $form->addCommandButton('updateNotificationSettings', $this->lng->txt('save'));

            $this->notificationSettingsForm = $form;

            return false;
        }

        return true;
    }

    public function updateNotificationSettings()
    {
        if (!$this->access->checkAccess('write', '', $this->parent_obj->ref_id)) {
            $this->parent_obj->error->raiseError($this->lng->txt('msg_no_perm_read'), $this->parent_obj->error->MESSAGE);
        }

        // instantiate the property form
        $this->initNotificationSettingsForm();

        // check input
        if ($this->notificationSettingsForm->checkInput()) {
            if (isset($_POST['notification_type']) && $_POST['notification_type'] == 'all_users') {
                // set values and call update
                $this->parent_obj->objProperties->setAdminForceNoti(1);
                $this->parent_obj->objProperties->setUserToggleNoti((int) $this->notificationSettingsForm->getInput('usr_toggle'));
                $this->parent_obj->objProperties->setNotificationType('all_users');
                $this->updateUserNotifications(true);
            } elseif ($_POST['notification_type'] == 'per_user') {
                $this->parent_obj->objProperties->setNotificationType('per_user');
                $this->parent_obj->objProperties->setAdminForceNoti(1);
                $this->parent_obj->objProperties->setUserToggleNoti(0);
                $this->updateUserNotifications();
            } else { //  if($_POST['notification_type'] == 'default')
                $this->parent_obj->objProperties->setNotificationType('default');
                $this->parent_obj->objProperties->setAdminForceNoti(0);
                $this->parent_obj->objProperties->setUserToggleNoti(0);
                $frm_noti = new ilForumNotification($this->parent_obj->object->getRefId());
                $frm_noti->deleteNotificationAllUsers();
            }

            $this->parent_obj->objProperties->update();

            // print success message
            ilUtil::sendSuccess($this->lng->txt('saved_successfully'));
        }
        $this->notificationSettingsForm->setValuesByPost();

        $this->showMembers();
        return;
    }
}