12     private $hlp = null;  variable in action_plugin_davcal_ajax
15         $this->hlp =& plugin_load('helper','davcal');
53       $acl = $this->hlp->checkCalendarPermission($id);
67       $calendarPages = $this->hlp->getCalendarPagesByMeta($page);
80                   $res = $this->hlp->addCalendarEntryToCalendarForPage($id, $user, $params);
106                   $data = array_merge($data, $this->hlp->getEventsWithinDateRange($calPage, 
114                   $res = $this->hlp->editCalendarEntryForPage($id, $user, $params);
136                   $res = $this->hlp->deleteCalendarEntryForPage($id, $params);
157               $data['settings'] = $this->hlp->getPersonalSettings($user);
158               $data['settings']['calids'] = $this->hlp->getCalendarMapForIDs($calendarPages);
160               $data['settings']['syncurl'] = $this->hlp->getSyncUrlForPage($page, $user);
161               $data['settings']['privateurl'] = $this->hlp->getPrivateURLForPage($page);
162               $data['settings']['principalurl'] = $this->hlp->getPrincipalUrlForUser($user);
163               $data['settings']['meta'] = $this->hlp->getCalendarMetaForPage($page);
173               if($this->hlp->savePersonalSettings($settings, $user))