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);
  33
  34         $include_user = ($what == 'all');
  35         if ($include_user) {
  36             //Also include site (global) events
  37             $courses[SITEID] = new stdClass;
  38             $courses[SITEID]->shortname = get_string('globalevents', 'calendar');
  39         }
  40
  41         switch($time) {
  42             case 'weeknow':
  43                 $startweekday  = get_user_preferences('calendar_startwday', CALENDAR_STARTING_WEEKDAY);
  44                 $startmonthday = find_day_in_month($now['mday'] - 6, $startweekday, $now['mon'], $now['year']);
  45                 $startmonth    = $now['mon'];
  46                 $startyear     = $now['year'];
  47                 if($startmonthday > calendar_days_in_month($startmonth, $startyear)) {
  48                     list($startmonth, $startyear) = calendar_add_month($startmonth, $startyear);
  49                     $startmonthday = find_day_in_month(1, $startweekday, $startmonth, $startyear);
  50                 }
  51                 $timestart = make_timestamp($startyear, $startmonth, $startmonthday);
  52                 $endmonthday = $startmonthday + 7;
  53                 $endmonth    = $startmonth;
  54                 $endyear     = $startyear;
  55                 if($endmonthday > calendar_days_in_month($endmonth, $endyear)) {
  56                     list($endmonth, $endyear) = calendar_add_month($endmonth, $endyear);
  57                     $endmonthday = find_day_in_month(1, $startweekday, $endmonth, $endyear);
  58                 }
  59                 $timeend = make_timestamp($endyear, $endmonth, $endmonthday) - 1;
  60             break;
  61             case 'weeknext':
  62                 $startweekday  = get_user_preferences('calendar_startwday', CALENDAR_STARTING_WEEKDAY);
  63                 $startmonthday = find_day_in_month($now['mday'] + 1, $startweekday, $now['mon'], $now['year']);
  64                 $startmonth    = $now['mon'];
  65                 $startyear     = $now['year'];
  66                 if($startmonthday > calendar_days_in_month($startmonth, $startyear)) {
  67                     list($startmonth, $startyear) = calendar_add_month($startmonth, $startyear);
  68                     $startmonthday = find_day_in_month(1, $startweekday, $startmonth, $startyear);
  69                 }
  70                 $timestart = make_timestamp($startyear, $startmonth, $startmonthday);
  71                 $endmonthday = $startmonthday + 7;
  72                 $endmonth    = $startmonth;
  73                 $endyear     = $startyear;
  74                 if($endmonthday > calendar_days_in_month($endmonth, $endyear)) {
  75                     list($endmonth, $endyear) = calendar_add_month($endmonth, $endyear);
  76                     $endmonthday = find_day_in_month(1, $startweekday, $endmonth, $endyear);
  77                 }
  78                 $timeend = make_timestamp($endyear, $endmonth, $endmonthday) - 1;
  79             break;
  80             case 'monthnow':
  81                 $timestart = make_timestamp($now['year'], $now['mon'], 1);
  82                 $timeend   = make_timestamp($now['year'], $now['mon'], calendar_days_in_month($now['mon'], $now['year']), 23, 59, 59);
  83             break;
  84             case 'monthnext':
  85                 list($nextmonth, $nextyear) = calendar_add_month($now['mon'], $now['year']);
  86                 $timestart = make_timestamp($nextyear, $nextmonth, 1);
  87                 $timeend   = make_timestamp($nextyear, $nextmonth, calendar_days_in_month($nextmonth, $nextyear), 23, 59, 59);
  88             break;
  89             case 'recentupcoming':
  90                 //Events in the last 5 or next 60 days
  91                 $timestart = time() - 432000;
  92                 $timeend = time() + 5184000;
  93             break;
  94         }
  95     }
  96     else {
  97         // Parameters given but incorrect, redirect back to export page
  98         redirect($CFG->wwwroot.'/calendar/export.php');
  99         die();
 100     }
 101 }
 102
 103 $whereclause = calendar_sql_where($timestart, $timeend, $include_user ? array($user->id) : false, false, array_keys($courses), false);
 104 if($whereclause === false) {
 105     $events = array();
 106 }
 107 else {
 108     $events = get_records_select('event', $whereclause, 'timestart');
 109 }
 110
 111 if ($events === false) {
 112     $events = array();
 113 }
 114
 115 $ical = new iCalendar;
 116 $ical->add_property('method', 'PUBLISH');
 117 foreach($events as $event) {
 118     $ev = new iCalendar_event;
 119     $ev->add_property('summary', $event->name);
 120     $ev->add_property('description', $event->description);
 121     $ev->add_property('class', 'PUBLIC'); // PUBLIC / PRIVATE / CONFIDENTIAL
 122     $ev->add_property('last-modified', Bennu::timestamp_to_datetime($event->timemodified));
 123     $ev->add_property('dtstamp', Bennu::timestamp_to_datetime()); // now
 124     $ev->add_property('dtstart', Bennu::timestamp_to_datetime($event->timestart)); // when event starts
 125     if ($event->timeduration > 0) {
 126         //dtend is better than duration, because it works in Microsoft Outlook and works better in Korganizer
 127         $ev->add_property('dtend', Bennu::timestamp_to_datetime($event->timestart + $event->timeduration));
 128     }
 129     if ($event->courseid != 0) {
 130         $ev->add_property('categories', $courses[$event->courseid]->shortname);
 131     }
 132     $ical->add_component($ev);
 133 }
 134
 135 $serialized = $ical->serialize();
 136 if(empty($serialized)) {
 137     // TODO
 138     die('bad serialization');
 139 }
 140
 141 //IE compatibility HACK!
 142 if(ini_get('zlib.output_compression')) {
 143     ini_set('zlib.output_compression', 'Off');
 144 }
 145
 146 $filename = 'icalexport.ics';
 147
 148 header('Last-Modified: '. gmdate('D, d M Y H:i:s', time()) .' GMT');
 149 header('Cache-Control: private, must-revalidate, pre-check=0, post-check=0, max-age=0');
 150 header('Expires: '. gmdate('D, d M Y H:i:s', 0) .'GMT');
 151 header('Pragma: no-cache');
 152 header('Accept-Ranges: none'); // Comment out if PDFs do not work...
 153 header('Content-disposition: attachment; filename='.$filename);
 154 header('Content-length: '.strlen($serialized));
 155 header('Content-type: text/calendar');
 156
 157 echo $serialized;
 158
 159 ?>