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Differences Between: [Versions 39 and 310] [Versions 39 and 311] [Versions 39 and 400] [Versions 39 and 401] [Versions 39 and 402] [Versions 39 and 403]

   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 && !$checkusername) || !$user) {
  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  $allowedwhat = ['all', 'user', 'groups', 'courses', 'categories'];
  44  $allowedtime = ['weeknow', 'weeknext', 'monthnow', 'monthnext', 'recentupcoming', 'custom'];
  45  
  46  if (!empty($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  $paramcategory = false;
  60  if(!empty($what) && !empty($time)) {
  61      if(in_array($what, $allowedwhat) && in_array($time, $allowedtime)) {
  62          $courses = enrol_get_users_courses($user->id, true, 'id, visible, shortname');
  63          // Array of courses that we will pass to calendar_get_legacy_events() which
  64          // is initially set to the list of the user's courses.
  65          $paramcourses = $courses;
  66          if ($what == 'all' || $what == 'groups') {
  67              $groups = array();
  68              foreach ($courses as $course) {
  69                  $course_groups = groups_get_all_groups($course->id, $user->id);
  70                  $groups = array_merge($groups, array_keys($course_groups));
  71              }
  72              if (empty($groups)) {
  73                  $groups = false;
  74              }
  75          }
  76          if ($what == 'all') {
  77              $users = $user->id;
  78              $courses[SITEID] = new stdClass;
  79              $courses[SITEID]->shortname = get_string('siteevents', 'calendar');
  80              $paramcourses[SITEID] = $courses[SITEID];
  81              $paramcategory = true;
  82          } else if ($what == 'groups') {
  83              $users = false;
  84              $paramcourses = array();
  85          } else if ($what == 'user') {
  86              $users = $user->id;
  87              $groups = false;
  88              $paramcourses = array();
  89          } else if ($what == 'categories') {
  90              $users = $user->id;
  91              $groups = false;
  92              $paramcourses = array();
  93              $paramcategory = true;
  94          } else {
  95              $users = false;
  96              $groups = false;
  97          }
  98  
  99          // Store the number of days in the week.
 100          $numberofdaysinweek = $calendartype->get_num_weekdays();
 101  
 102          switch($time) {
 103              case 'weeknow':
 104                  $startweekday = calendar_get_starting_weekday();
 105                  $startmonthday = find_day_in_month($now['mday'] - ($numberofdaysinweek - 1), $startweekday, $now['mon'], $now['year']);
 106                  $startmonth = $now['mon'];
 107                  $startyear = $now['year'];
 108                  if ($startmonthday > calendar_days_in_month($startmonth, $startyear)) {
 109                      list($startmonth, $startyear) = calendar_add_month($startmonth, $startyear);
 110                      $startmonthday = find_day_in_month(1, $startweekday, $startmonth, $startyear);
 111                  }
 112                  $gregoriandate = $calendartype->convert_to_gregorian($startyear, $startmonth, $startmonthday);
 113                  $timestart = make_timestamp($gregoriandate['year'], $gregoriandate['month'], $gregoriandate['day'],
 114                      $gregoriandate['hour'], $gregoriandate['minute']);
 115  
 116                  $endmonthday = $startmonthday + $numberofdaysinweek;
 117                  $endmonth = $startmonth;
 118                  $endyear = $startyear;
 119                  if ($endmonthday > calendar_days_in_month($endmonth, $endyear)) {
 120                      list($endmonth, $endyear) = calendar_add_month($endmonth, $endyear);
 121                      $endmonthday = find_day_in_month(1, $startweekday, $endmonth, $endyear);
 122                  }
 123                  $gregoriandate = $calendartype->convert_to_gregorian($endyear, $endmonth, $endmonthday);
 124                  $timeend = make_timestamp($gregoriandate['year'], $gregoriandate['month'], $gregoriandate['day'],
 125                      $gregoriandate['hour'], $gregoriandate['minute']);
 126              break;
 127              case 'weeknext':
 128                  $startweekday = calendar_get_starting_weekday();
 129                  $startmonthday = find_day_in_month($now['mday'] + 1, $startweekday, $now['mon'], $now['year']);
 130                  $startmonth = $now['mon'];
 131                  $startyear = $now['year'];
 132                  if ($startmonthday > calendar_days_in_month($startmonth, $startyear)) {
 133                      list($startmonth, $startyear) = calendar_add_month($startmonth, $startyear);
 134                      $startmonthday = find_day_in_month(1, $startweekday, $startmonth, $startyear);
 135                  }
 136                  $gregoriandate = $calendartype->convert_to_gregorian($startyear, $startmonth, $startmonthday);
 137                  $timestart = make_timestamp($gregoriandate['year'], $gregoriandate['month'], $gregoriandate['day'],
 138                      $gregoriandate['hour'], $gregoriandate['minute']);
 139  
 140                  $endmonthday = $startmonthday + $numberofdaysinweek;
 141                  $endmonth = $startmonth;
 142                  $endyear = $startyear;
 143                  if ($endmonthday > calendar_days_in_month($endmonth, $endyear)) {
 144                      list($endmonth, $endyear) = calendar_add_month($endmonth, $endyear);
 145                      $endmonthday = find_day_in_month(1, $startweekday, $endmonth, $endyear);
 146                  }
 147                  $gregoriandate = $calendartype->convert_to_gregorian($endyear, $endmonth, $endmonthday);
 148                  $timeend = make_timestamp($gregoriandate['year'], $gregoriandate['month'], $gregoriandate['day'],
 149                      $gregoriandate['hour'], $gregoriandate['minute']);
 150              break;
 151              case 'monthnow':
 152                  // Convert to gregorian.
 153                  $gregoriandate = $calendartype->convert_to_gregorian($now['year'], $now['mon'], 1);
 154  
 155                  $timestart = make_timestamp($gregoriandate['year'], $gregoriandate['month'], $gregoriandate['day'],
 156                      $gregoriandate['hour'], $gregoriandate['minute']);
 157                  $timeend = $timestart + (calendar_days_in_month($now['mon'], $now['year']) * DAYSECS);
 158              break;
 159              case 'monthnext':
 160                  // Get the next month for this calendar.
 161                  list($nextmonth, $nextyear) = calendar_add_month($now['mon'], $now['year']);
 162  
 163                  // Convert to gregorian.
 164                  $gregoriandate = $calendartype->convert_to_gregorian($nextyear, $nextmonth, 1);
 165  
 166                  // Create the timestamps.
 167                  $timestart = make_timestamp($gregoriandate['year'], $gregoriandate['month'], $gregoriandate['day'],
 168                      $gregoriandate['hour'], $gregoriandate['minute']);
 169                  $timeend = $timestart + (calendar_days_in_month($nextmonth, $nextyear) * DAYSECS);
 170              break;
 171              case 'recentupcoming':
 172                  //Events in the last 5 or next 60 days
 173                  $timestart = time() - 432000;
 174                  $timeend = time() + 5184000;
 175              break;
 176              case 'custom':
 177                  // Events based on custom date range.
 178                  $timestart = time() - $CFG->calendar_exportlookback * DAYSECS;
 179                  $timeend = time() + $CFG->calendar_exportlookahead * DAYSECS;
 180              break;
 181          }
 182      }
 183      else {
 184          // Parameters given but incorrect, redirect back to export page
 185          redirect($CFG->wwwroot.'/calendar/export.php');
 186          die();
 187      }
 188  }
 189  $limitnum = 0;
 190  $events = calendar_get_legacy_events($timestart, $timeend, $users, $groups, array_keys($paramcourses), false, true,
 191          $paramcategory, $limitnum);
 192  
 193  $ical = new iCalendar;
 194  $ical->add_property('method', 'PUBLISH');
 195  $ical->add_property('prodid', '-//Moodle Pty Ltd//NONSGML Moodle Version ' . $CFG->version . '//EN');
 196  foreach($events as $event) {
 197      if (!empty($event->modulename)) {
 198          $instances = get_fast_modinfo($event->courseid, $userid)->get_instances_of($event->modulename);
 199          if (empty($instances[$event->instance]->uservisible)) {
 200              continue;
 201          }
 202      }
 203      $hostaddress = str_replace('http://', '', $CFG->wwwroot);
 204      $hostaddress = str_replace('https://', '', $hostaddress);
 205  
 206      $me = new calendar_event($event); // To use moodle calendar event services.
 207      $ev = new iCalendar_event; // To export in ical format.
 208      $ev->add_property('uid', $event->id.'@'.$hostaddress);
 209  
 210      // Set iCal event summary from event name.
 211      $ev->add_property('summary', format_string($event->name, true, ['context' => $me->context]));
 212  
 213      // Format the description text.
 214      $description = format_text($me->description, $me->format, ['context' => $me->context]);
 215      // Then convert it to plain text, since it's the only format allowed for the event description property.
 216      // We use html_to_text in order to convert <br> and <p> tags to new line characters for descriptions in HTML format.
 217      $description = html_to_text($description, 0);
 218      $ev->add_property('description', $description);
 219  
 220      $ev->add_property('class', 'PUBLIC'); // PUBLIC / PRIVATE / CONFIDENTIAL
 221      $ev->add_property('last-modified', Bennu::timestamp_to_datetime($event->timemodified));
 222  
 223      if (!empty($event->location)) {
 224          $ev->add_property('location', $event->location);
 225      }
 226  
 227      $ev->add_property('dtstamp', Bennu::timestamp_to_datetime()); // now
 228      if ($event->timeduration > 0) {
 229          //dtend is better than duration, because it works in Microsoft Outlook and works better in Korganizer
 230          $ev->add_property('dtstart', Bennu::timestamp_to_datetime($event->timestart)); // when event starts.
 231          $ev->add_property('dtend', Bennu::timestamp_to_datetime($event->timestart + $event->timeduration));
 232      } else if ($event->timeduration == 0) {
 233          // When no duration is present, the event is instantaneous event, ex - Due date of a module.
 234          // Moodle doesn't support all day events yet. See MDL-56227.
 235          $ev->add_property('dtstart', Bennu::timestamp_to_datetime($event->timestart));
 236          $ev->add_property('dtend', Bennu::timestamp_to_datetime($event->timestart));
 237      } else {
 238          // This can be used to represent all day events in future.
 239          throw new coding_exception("Negative duration is not supported yet.");
 240      }
 241      if ($event->courseid != 0) {
 242          $coursecontext = context_course::instance($event->courseid);
 243          $ev->add_property('categories', format_string($courses[$event->courseid]->shortname, true, array('context' => $coursecontext)));
 244      }
 245      $ical->add_component($ev);
 246  }
 247  
 248  $serialized = $ical->serialize();
 249  if(empty($serialized)) {
 250      // TODO
 251      die('bad serialization');
 252  }
 253  
 254  $filename = 'icalexport.ics';
 255  
 256  header('Last-Modified: '. gmdate('D, d M Y H:i:s', time()) .' GMT');
 257  header('Cache-Control: private, must-revalidate, pre-check=0, post-check=0, max-age=0');
 258  header('Expires: '. gmdate('D, d M Y H:i:s', 0) .'GMT');
 259  header('Pragma: no-cache');
 260  header('Accept-Ranges: none'); // Comment out if PDFs do not work...
 261  header('Content-disposition: attachment; filename='.$filename);
 262  header('Content-length: '.strlen($serialized));
 263  header('Content-type: text/calendar; charset=utf-8');
 264  
 265  echo $serialized;