calendar/export_execute.php

   1 <?php // $Id$
   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 $username = required_param('username', PARAM_TEXT);
   9 $authtoken = required_param('authtoken', PARAM_ALPHANUM);
  10
  11 //Fetch user information
  12 if (!$user = get_complete_user_data('username', $username)) {
  13    //No such user
  14    die("No such user '$username'");
  15 }
  16
  17 //Check authentication token
  18 if ($authtoken != sha1($username . $user->password)) {
  19     die('Invalid authentication token');
  20 }
  21
  22 $what = optional_param('preset_what', 'all', PARAM_ALPHA);
  23 $time = optional_param('preset_time', 'weeknow', PARAM_ALPHA);
  24
  25 $now = usergetdate(time());
  26 // Let's see if we have sufficient and correct data
  27 $allowed_what = array('all', 'courses');
  28 $allowed_time = array('weeknow', 'weeknext', 'monthnow', 'monthnext', 'recentupcoming');
  29
  30 if(!empty($what) && !empty($time)) {
  31     if(in_array($what, $allowed_what) && in_array($time, $allowed_time)) {
  32         $courses = get_my_courses($user->id, NULL, 'id, visible, shortname');
  33
  34         if ($what == 'all') {
  35             $users = $user->id;
  36             $groups = array();
  37             foreach ($courses as $course) {
  38                 $course_groups = groups_get_all_groups($course->id, $user->id);
  39                 if ($course_groups) {
  40                     $groups = $groups + array_keys($course_groups);
  41                 }
  42             }
  43             if (empty($groups)) {
  44                 $groups = false;
  45             }
  46             $courses[SITEID] = new stdClass;
  47             $courses[SITEID]->shortname = get_string('globalevents', 'calendar');
  48         } else {
  49             $users = false;
  50             $groups = false;
  51         }
  52
  53         switch($time) {
  54             case 'weeknow':
  55                 $startweekday  = get_user_preferences('calendar_startwday', CALENDAR_STARTING_WEEKDAY);
  56                 $startmonthday = find_day_in_month($now['mday'] - 6, $startweekday, $now['mon'], $now['year']);
  57                 $startmonth    = $now['mon'];
  58                 $startyear     = $now['year'];
  59                 if($startmonthday > calendar_days_in_month($startmonth, $startyear)) {
  60                     list($startmonth, $startyear) = calendar_add_month($startmonth, $startyear);
  61                     $startmonthday = find_day_in_month(1, $startweekday, $startmonth, $startyear);
  62                 }
  63                 $timestart = make_timestamp($startyear, $startmonth, $startmonthday);
  64                 $endmonthday = $startmonthday + 7;
  65                 $endmonth    = $startmonth;
  66                 $endyear     = $startyear;
  67                 if($endmonthday > calendar_days_in_month($endmonth, $endyear)) {
  68                     list($endmonth, $endyear) = calendar_add_month($endmonth, $endyear);
  69                     $endmonthday = find_day_in_month(1, $startweekday, $endmonth, $endyear);
  70                 }
  71                 $timeend = make_timestamp($endyear, $endmonth, $endmonthday) - 1;
  72             break;
  73             case 'weeknext':
  74                 $startweekday  = get_user_preferences('calendar_startwday', CALENDAR_STARTING_WEEKDAY);
  75                 $startmonthday = find_day_in_month($now['mday'] + 1, $startweekday, $now['mon'], $now['year']);
  76                 $startmonth    = $now['mon'];
  77                 $startyear     = $now['year'];
  78                 if($startmonthday > calendar_days_in_month($startmonth, $startyear)) {
  79                     list($startmonth, $startyear) = calendar_add_month($startmonth, $startyear);
  80                     $startmonthday = find_day_in_month(1, $startweekday, $startmonth, $startyear);
  81                 }
  82                 $timestart = make_timestamp($startyear, $startmonth, $startmonthday);
  83                 $endmonthday = $startmonthday + 7;
  84                 $endmonth    = $startmonth;
  85                 $endyear     = $startyear;
  86                 if($endmonthday > calendar_days_in_month($endmonth, $endyear)) {
  87                     list($endmonth, $endyear) = calendar_add_month($endmonth, $endyear);
  88                     $endmonthday = find_day_in_month(1, $startweekday, $endmonth, $endyear);
  89                 }
  90                 $timeend = make_timestamp($endyear, $endmonth, $endmonthday) - 1;
  91             break;
  92             case 'monthnow':
  93                 $timestart = make_timestamp($now['year'], $now['mon'], 1);
  94                 $timeend   = make_timestamp($now['year'], $now['mon'], calendar_days_in_month($now['mon'], $now['year']), 23, 59, 59);
  95             break;
  96             case 'monthnext':
  97                 list($nextmonth, $nextyear) = calendar_add_month($now['mon'], $now['year']);
  98                 $timestart = make_timestamp($nextyear, $nextmonth, 1);
  99                 $timeend   = make_timestamp($nextyear, $nextmonth, calendar_days_in_month($nextmonth, $nextyear), 23, 59, 59);
 100             break;
 101             case 'recentupcoming':
 102                 //Events in the last 5 or next 60 days
 103                 $timestart = time() - 432000;
 104                 $timeend = time() + 5184000;
 105             break;
 106         }
 107     }
 108     else {
 109         // Parameters given but incorrect, redirect back to export page
 110         redirect($CFG->wwwroot.'/calendar/export.php');
 111         die();
 112     }
 113 }
 114 $events = calendar_get_events($timestart, $timeend, $users, $groups, array_keys($courses), false);
 115
 116 $ical = new iCalendar;
 117 $ical->add_property('method', 'PUBLISH');
 118 foreach($events as $event) {
 119    if (!empty($event->modulename)) {
 120         $cm = get_coursemodule_from_instance($event->modulename, $event->instance);
 121         if (!groups_course_module_visible($cm)) {
 122             continue;
 123         }
 124     }
 125     $ev = new iCalendar_event;
 126     $ev->add_property('summary', $event->name);
 127     $ev->add_property('description', $event->description);
 128     $ev->add_property('class', 'PUBLIC'); // PUBLIC / PRIVATE / CONFIDENTIAL
 129     $ev->add_property('last-modified', Bennu::timestamp_to_datetime($event->timemodified));
 130     $ev->add_property('dtstamp', Bennu::timestamp_to_datetime()); // now
 131     $ev->add_property('dtstart', Bennu::timestamp_to_datetime($event->timestart)); // when event starts
 132     if ($event->timeduration > 0) {
 133         //dtend is better than duration, because it works in Microsoft Outlook and works better in Korganizer
 134         $ev->add_property('dtend', Bennu::timestamp_to_datetime($event->timestart + $event->timeduration));
 135     }
 136     if ($event->courseid != 0) {
 137         $ev->add_property('categories', $courses[$event->courseid]->shortname);
 138     }
 139     $ical->add_component($ev);
 140 }
 141
 142 $serialized = $ical->serialize();
 143 if(empty($serialized)) {
 144     // TODO
 145     die('bad serialization');
 146 }
 147
 148 //IE compatibility HACK!
 149 if(ini_get('zlib.output_compression')) {
 150     ini_set('zlib.output_compression', 'Off');
 151 }
 152
 153 $filename = 'icalexport.ics';
 154
 155 header('Last-Modified: '. gmdate('D, d M Y H:i:s', time()) .' GMT');
 156 header('Cache-Control: private, must-revalidate, pre-check=0, post-check=0, max-age=0');
 157 header('Expires: '. gmdate('D, d M Y H:i:s', 0) .'GMT');
 158 header('Pragma: no-cache');
 159 header('Accept-Ranges: none'); // Comment out if PDFs do not work...
 160 header('Content-disposition: attachment; filename='.$filename);
 161 header('Content-length: '.strlen($serialized));
 162 header('Content-type: text/calendar');
 163
 164 echo $serialized;
 165
 166 ?>