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  • Bug fixes for general core bugs in 2.8.x ended 9 November 2015 (12 months).
  • Bug fixes for security issues in 2.8.x ended 9 May 2016 (18 months).
  • minimum PHP 5.4.4 (always use latest PHP 5.4.x or 5.5.x on Windows - http://windows.php.net/download/), PHP 7 is NOT supported
  • Differences Between: [Versions 28 and 32] [Versions 28 and 33] [Versions 28 and 34] [Versions 28 and 35] [Versions 28 and 36] [Versions 28 and 37]

       1  <?php
       2  
       3  require_once('../config.php');
       4  //require_once($CFG->dirroot.'/course/lib.php');
       5  require_once($CFG->dirroot.'/calendar/lib.php');
       6  require_once($CFG->libdir.'/bennu/bennu.inc.php');
       7  
       8  $userid = optional_param('userid', 0, PARAM_INT);
       9  $username = optional_param('username', '', PARAM_TEXT);
      10  $authtoken = required_param('authtoken', PARAM_ALPHANUM);
      11  $generateurl = optional_param('generateurl', '', PARAM_TEXT);
      12  
      13  if (empty($CFG->enablecalendarexport)) {
      14      die('no export');
      15  }
      16  
      17  //Fetch user information
      18  $checkuserid = !empty($userid) && $user = $DB->get_record('user', array('id' => $userid), 'id,password');
      19  //allowing for fallback check of old url - MDL-27542
      20  $checkusername = !empty($username) && $user = $DB->get_record('user', array('username' => $username), 'id,password');
      21  if (!$checkuserid && !$checkusername) {
      22      //No such user
      23      die('Invalid authentication');
      24  }
      25  
      26  //Check authentication token
      27  $authuserid = !empty($userid) && $authtoken == sha1($userid . $user->password . $CFG->calendar_exportsalt);
      28  //allowing for fallback check of old url - MDL-27542
      29  $authusername = !empty($username) && $authtoken == sha1($username . $user->password . $CFG->calendar_exportsalt);
      30  if (!$authuserid && !$authusername) {
      31      die('Invalid authentication');
      32  }
      33  
      34  // Get the calendar type we are using.
      35  $calendartype = \core_calendar\type_factory::get_calendar_instance();
      36  
      37  $what = optional_param('preset_what', 'all', PARAM_ALPHA);
      38  $time = optional_param('preset_time', 'weeknow', PARAM_ALPHA);
      39  
      40  $now = $calendartype->timestamp_to_date_array(time());
      41  
      42  // Let's see if we have sufficient and correct data
      43  $allowed_what = array('all', 'courses');
      44  $allowed_time = array('weeknow', 'weeknext', 'monthnow', 'monthnext', 'recentupcoming', 'custom');
      45  
      46  if (!empty($generateurl)) {
      47      $authtoken = sha1($user->id . $user->password . $CFG->calendar_exportsalt);
      48      $params = array();
      49      $params['preset_what'] = $what;
      50      $params['preset_time'] = $time;
      51      $params['userid'] = $userid;
      52      $params['authtoken'] = $authtoken;
      53      $params['generateurl'] = true;
      54  
      55      $link = new moodle_url('/calendar/export.php', $params);
      56      redirect($link->out());
      57      die;
      58  }
      59  
      60  if(!empty($what) && !empty($time)) {
      61      if(in_array($what, $allowed_what) && in_array($time, $allowed_time)) {
      62          $courses = enrol_get_users_courses($user->id, true, 'id, visible, shortname');
      63  
      64          if ($what == 'all') {
      65              $users = $user->id;
      66              $groups = array();
      67              foreach ($courses as $course) {
      68                  $course_groups = groups_get_all_groups($course->id, $user->id);
      69                  $groups = array_merge($groups, array_keys($course_groups));
      70              }
      71              if (empty($groups)) {
      72                  $groups = false;
      73              }
      74              $courses[SITEID] = new stdClass;
      75              $courses[SITEID]->shortname = get_string('globalevents', 'calendar');
      76          } else {
      77              $users = false;
      78              $groups = false;
      79          }
      80  
      81          // Store the number of days in the week.
      82          $numberofdaysinweek = $calendartype->get_num_weekdays();
      83  
      84          switch($time) {
      85              case 'weeknow':
      86                  $startweekday = calendar_get_starting_weekday();
      87                  $startmonthday = find_day_in_month($now['mday'] - ($numberofdaysinweek - 1), $startweekday, $now['mon'], $now['year']);
      88                  $startmonth = $now['mon'];
      89                  $startyear = $now['year'];
      90                  if($startmonthday > calendar_days_in_month($startmonth, $startyear)) {
      91                      list($startmonth, $startyear) = calendar_add_month($startmonth, $startyear);
      92                      $startmonthday = find_day_in_month(1, $startweekday, $startmonth, $startyear);
      93                  }
      94                  $gregoriandate = $calendartype->convert_to_gregorian($startyear, $startmonth, $startmonthday);
      95                  $timestart = make_timestamp($gregoriandate['year'], $gregoriandate['month'], $gregoriandate['day'],
      96                      $gregoriandate['hour'], $gregoriandate['minute']);
      97  
      98                  $endmonthday = $startmonthday + $numberofdaysinweek;
      99                  $endmonth = $startmonth;
     100                  $endyear = $startyear;
     101                  if($endmonthday > calendar_days_in_month($endmonth, $endyear)) {
     102                      list($endmonth, $endyear) = calendar_add_month($endmonth, $endyear);
     103                      $endmonthday = find_day_in_month(1, $startweekday, $endmonth, $endyear);
     104                  }
     105                  $gregoriandate = $calendartype->convert_to_gregorian($endyear, $endmonth, $endmonthday);
     106                  $timeend = make_timestamp($gregoriandate['year'], $gregoriandate['month'], $gregoriandate['day'],
     107                      $gregoriandate['hour'], $gregoriandate['minute']);
     108              break;
     109              case 'weeknext':
     110                  $startweekday = calendar_get_starting_weekday();
     111                  $startmonthday = find_day_in_month($now['mday'] + 1, $startweekday, $now['mon'], $now['year']);
     112                  $startmonth = $now['mon'];
     113                  $startyear = $now['year'];
     114                  if($startmonthday > calendar_days_in_month($startmonth, $startyear)) {
     115                      list($startmonth, $startyear) = calendar_add_month($startmonth, $startyear);
     116                      $startmonthday = find_day_in_month(1, $startweekday, $startmonth, $startyear);
     117                  }
     118                  $gregoriandate = $calendartype->convert_to_gregorian($startyear, $startmonth, $startmonthday);
     119                  $timestart = make_timestamp($gregoriandate['year'], $gregoriandate['month'], $gregoriandate['day'],
     120                      $gregoriandate['hour'], $gregoriandate['minute']);
     121  
     122                  $endmonthday = $startmonthday + $numberofdaysinweek;
     123                  $endmonth = $startmonth;
     124                  $endyear = $startyear;
     125                  if($endmonthday > calendar_days_in_month($endmonth, $endyear)) {
     126                      list($endmonth, $endyear) = calendar_add_month($endmonth, $endyear);
     127                      $endmonthday = find_day_in_month(1, $startweekday, $endmonth, $endyear);
     128                  }
     129                  $gregoriandate = $calendartype->convert_to_gregorian($endyear, $endmonth, $endmonthday);
     130                  $timeend = make_timestamp($gregoriandate['year'], $gregoriandate['month'], $gregoriandate['day'],
     131                      $gregoriandate['hour'], $gregoriandate['minute']);
     132              break;
     133              case 'monthnow':
     134                  // Convert to gregorian.
     135                  $gregoriandate = $calendartype->convert_to_gregorian($now['year'], $now['mon'], 1);
     136  
     137                  $timestart = make_timestamp($gregoriandate['year'], $gregoriandate['month'], $gregoriandate['day'],
     138                      $gregoriandate['hour'], $gregoriandate['minute']);
     139                  $timeend = $timestart + (calendar_days_in_month($now['mon'], $now['year']) * DAYSECS);
     140              break;
     141              case 'monthnext':
     142                  // Get the next month for this calendar.
     143                  list($nextmonth, $nextyear) = calendar_add_month($now['mon'], $now['year']);
     144  
     145                  // Convert to gregorian.
     146                  $gregoriandate = $calendartype->convert_to_gregorian($nextyear, $nextmonth, 1);
     147  
     148                  // Create the timestamps.
     149                  $timestart = make_timestamp($gregoriandate['year'], $gregoriandate['month'], $gregoriandate['day'],
     150                      $gregoriandate['hour'], $gregoriandate['minute']);
     151                  $timeend = $timestart + (calendar_days_in_month($nextmonth, $nextyear) * DAYSECS);
     152              break;
     153              case 'recentupcoming':
     154                  //Events in the last 5 or next 60 days
     155                  $timestart = time() - 432000;
     156                  $timeend = time() + 5184000;
     157              break;
     158              case 'custom':
     159                  // Events based on custom date range.
     160                  $timestart = time() - $CFG->calendar_exportlookback * DAYSECS;
     161                  $timeend = time() + $CFG->calendar_exportlookahead * DAYSECS;
     162              break;
     163          }
     164      }
     165      else {
     166          // Parameters given but incorrect, redirect back to export page
     167          redirect($CFG->wwwroot.'/calendar/export.php');
     168          die();
     169      }
     170  }
     171  $events = calendar_get_events($timestart, $timeend, $users, $groups, array_keys($courses), false);
     172  
     173  $ical = new iCalendar;
     174  $ical->add_property('method', 'PUBLISH');
     175  foreach($events as $event) {
     176     if (!empty($event->modulename)) {
     177          $cm = get_coursemodule_from_instance($event->modulename, $event->instance);
     178          if (!\core_availability\info_module::is_user_visible($cm, $userid, false)) {
     179              continue;
     180          }
     181      }
     182      $hostaddress = str_replace('http://', '', $CFG->wwwroot);
     183      $hostaddress = str_replace('https://', '', $hostaddress);
     184  
     185      $ev = new iCalendar_event;
     186      $ev->add_property('uid', $event->id.'@'.$hostaddress);
     187      $ev->add_property('summary', $event->name);
     188      $ev->add_property('description', clean_param($event->description, PARAM_NOTAGS));
     189      $ev->add_property('class', 'PUBLIC'); // PUBLIC / PRIVATE / CONFIDENTIAL
     190      $ev->add_property('last-modified', Bennu::timestamp_to_datetime($event->timemodified));
     191      $ev->add_property('dtstamp', Bennu::timestamp_to_datetime()); // now
     192      if ($event->timeduration > 0) {
     193          //dtend is better than duration, because it works in Microsoft Outlook and works better in Korganizer
     194          $ev->add_property('dtstart', Bennu::timestamp_to_datetime($event->timestart)); // when event starts.
     195          $ev->add_property('dtend', Bennu::timestamp_to_datetime($event->timestart + $event->timeduration));
     196      } else {
     197          // When no duration is present, ie an all day event, VALUE should be date instead of time and dtend = dtstart + 1 day.
     198          $ev->add_property('dtstart', Bennu::timestamp_to_date($event->timestart), array('value' => 'DATE')); // All day event.
     199          $ev->add_property('dtend', Bennu::timestamp_to_date($event->timestart + DAYSECS), array('value' => 'DATE')); // All day event.
     200      }
     201      if ($event->courseid != 0) {
     202          $coursecontext = context_course::instance($event->courseid);
     203          $ev->add_property('categories', format_string($courses[$event->courseid]->shortname, true, array('context' => $coursecontext)));
     204      }
     205      $ical->add_component($ev);
     206  }
     207  
     208  $serialized = $ical->serialize();
     209  if(empty($serialized)) {
     210      // TODO
     211      die('bad serialization');
     212  }
     213  
     214  $filename = 'icalexport.ics';
     215  
     216  header('Last-Modified: '. gmdate('D, d M Y H:i:s', time()) .' GMT');
     217  header('Cache-Control: private, must-revalidate, pre-check=0, post-check=0, max-age=0');
     218  header('Expires: '. gmdate('D, d M Y H:i:s', 0) .'GMT');
     219  header('Pragma: no-cache');
     220  header('Accept-Ranges: none'); // Comment out if PDFs do not work...
     221  header('Content-disposition: attachment; filename='.$filename);
     222  header('Content-length: '.strlen($serialized));
     223  header('Content-type: text/calendar; charset=utf-8');
     224  
     225  echo $serialized;
    

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