calendar/view.php

   1 <?php // $Id$
   2
   3 /////////////////////////////////////////////////////////////////////////////
   4 //                                                                         //
   5 // NOTICE OF COPYRIGHT                                                     //
   6 //                                                                         //
   7 // Moodle - Calendar extension                                             //
   8 //                                                                         //
   9 // Copyright (C) 2003-2004  Greek School Network            www.sch.gr     //
  10 //                                                                         //
  11 // Designed by:                                                            //
  12 //     Avgoustos Tsinakos (tsinakos@teikav.edu.gr)                         //
  13 //     Jon Papaioannou (pj@moodle.org)                                     //
  14 //                                                                         //
  15 // Programming and development:                                            //
  16 //     Jon Papaioannou (pj@moodle.org)                                     //
  17 //                                                                         //
  18 // For bugs, suggestions, etc contact:                                     //
  19 //     Jon Papaioannou (pj@moodle.org)                                     //
  20 //                                                                         //
  21 // The current module was developed at the University of Macedonia         //
  22 // (www.uom.gr) under the funding of the Greek School Network (www.sch.gr) //
  23 // The aim of this project is to provide additional and improved           //
  24 // functionality to the Asynchronous Distance Education service that the   //
  25 // Greek School Network deploys.                                           //
  26 //                                                                         //
  27 // This program is free software; you can redistribute it and/or modify    //
  28 // it under the terms of the GNU General Public License as published by    //
  29 // the Free Software Foundation; either version 2 of the License, or       //
  30 // (at your option) any later version.                                     //
  31 //                                                                         //
  32 // This program is distributed in the hope that it will be useful,         //
  33 // but WITHOUT ANY WARRANTY; without even the implied warranty of          //
  34 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           //
  35 // GNU General Public License for more details:                            //
  36 //                                                                         //
  37 //          http://www.gnu.org/copyleft/gpl.html                           //
  38 //                                                                         //
  39 /////////////////////////////////////////////////////////////////////////////
  40
  41 //  Display the calendar page.
  42
  43     require_once('../config.php');
  44     require_once($CFG->dirroot.'/course/lib.php');
  45     require_once($CFG->dirroot.'/calendar/lib.php');
  46
  47     $courseid = optional_param('course', 0, PARAM_INT);
  48     $view = optional_param('view', 'upcoming', PARAM_ALPHA);
  49     $day  = optional_param('cal_d', 0, PARAM_INT);
  50     $mon  = optional_param('cal_m', 0, PARAM_INT);
  51     $yr   = optional_param('cal_y', 0, PARAM_INT);
  52
  53     if(!$site = get_site()) {
  54         redirect($CFG->wwwroot.'/'.$CFG->admin.'/index.php');
  55     }
  56
  57     if ($courseid) {
  58         require_login($courseid);
  59     } else if ($CFG->forcelogin) {
  60         require_login();
  61     }
  62
  63     // Initialize the session variables
  64     calendar_session_vars();
  65
  66     //add_to_log($course->id, "course", "view", "view.php?id=$course->id", "$course->id");
  67     $now = usergetdate(time());
  68     $pagetitle = '';
  69
  70     $nav = calendar_get_link_tag(get_string('calendar', 'calendar'), CALENDAR_URL.'view.php?view=upcoming&amp;course='.$courseid.'&amp;', $now['mday'], $now['mon'], $now['year']);
  71
  72
  73     if(!checkdate($mon, $day, $yr)) {
  74         $day = intval($now['mday']);
  75         $mon = intval($now['mon']);
  76         $yr = intval($now['year']);
  77     }
  78     $time = make_timestamp($yr, $mon, $day);
  79
  80     switch($view) {
  81         case 'day':
  82             $nav .= ' -> '.userdate($time, get_string('strftimedate'));
  83             $pagetitle = get_string('dayview', 'calendar');
  84         break;
  85         case 'month':
  86             $nav .= ' -> '.userdate($time, get_string('strftimemonthyear'));
  87             $pagetitle = get_string('detailedmonthview', 'calendar');
  88         break;
  89         case 'upcoming':
  90             $pagetitle = get_string('upcomingevents', 'calendar');
  91         break;
  92     }
  93
  94     // If a course has been supplied in the URL, change the filters to show that one
  95     if (!empty($courseid)) {
  96         if ($course = get_record('course', 'id', $courseid)) {
  97             if ($course->id == SITEID) {
  98                 // If coming from the home page, show all courses
  99                 $SESSION->cal_courses_shown = calendar_get_default_courses(true);
 100                 calendar_set_referring_course(0);
 101
 102             } else {
 103                 // Otherwise show just this one
 104                 $SESSION->cal_courses_shown = $course->id;
 105                 calendar_set_referring_course($SESSION->cal_courses_shown);
 106             }
 107         }
 108     } else {
 109         $course = null;
 110     }
 111
 112     if (empty($USER->id) or isguest()) {
 113         $defaultcourses = calendar_get_default_courses();
 114         calendar_set_filters($courses, $groups, $users, $defaultcourses, $defaultcourses);
 115
 116     } else {
 117         calendar_set_filters($courses, $groups, $users);
 118     }
 119
 120     // Let's see if we are supposed to provide a referring course link
 121     // but NOT for the "main page" course
 122     if ($SESSION->cal_course_referer != SITEID &&
 123        ($shortname = get_field('course', 'shortname', 'id', $SESSION->cal_course_referer)) !== false) {
 124         // If we know about the referring course, show a return link and ALSO require login!
 125         require_login();
 126         $nav = '<a href="'.$CFG->wwwroot.'/course/view.php?id='.$SESSION->cal_course_referer.'">'.$shortname.'</a> -> '.$nav;
 127         if (empty($course)) {
 128             $course = get_record('course', 'id', $SESSION->cal_course_referer); // Useful to have around
 129         }
 130     }
 131
 132     $strcalendar = get_string('calendar', 'calendar');
 133     $prefsbutton = calendar_preferences_button();
 134
 135     // Print title and header
 136     print_header("$site->shortname: $strcalendar: $pagetitle", $strcalendar, $nav,
 137                  '', '', true, $prefsbutton, user_login_string($site));
 138
 139     echo calendar_overlib_html();
 140
 141     // Layout the whole page as three big columns.
 142     echo '<table id="calendar" style="height:100%;">';
 143     echo '<tr>';
 144
 145     // START: Main column
 146
 147     echo '<td class="maincalendar">';
 148     echo '<div class="heightcontainer">';
 149
 150     switch($view) {
 151         case 'day':
 152             calendar_show_day($day, $mon, $yr, $courses, $groups, $users, $courseid);
 153         break;
 154         case 'month':
 155             calendar_show_month_detailed($mon, $yr, $courses, $groups, $users, $courseid);
 156         break;
 157         case 'upcoming':
 158             calendar_show_upcoming_events($courses, $groups, $users, get_user_preferences('calendar_lookahead', CALENDAR_UPCOMING_DAYS), get_user_preferences('calendar_maxevents', CALENDAR_UPCOMING_MAXEVENTS), $courseid);
 159         break;
 160     }
 161
 162     //Link to calendar export page
 163     echo '<div class="bottom">';
 164     print_single_button('export.php', false, get_string('exportcalendar', 'calendar'));
 165
 166     if (!empty($USER->id)) {
 167         $authtoken = sha1($USER->username . $USER->password);
 168         $usernameencoded = urlencode($USER->username);
 169
 170         echo "<a href=\"export_execute.php?preset_what=all&amp;preset_time=recentupcoming&amp;username=$usernameencoded&amp;authtoken=$authtoken\">"
 171              .'<img src="'.$CFG->pixpath.'/i/ical.gif" height="14" width="36" '
 172              .'alt="'.get_string('ical', 'calendar').'" '
 173              .'title="'.get_string('quickdownloadcalendar', 'calendar').'" />'
 174              .'</a>';
 175     }
 176
 177     echo '</div>';
 178     echo '</div>';
 179     echo '</td>';
 180
 181     // END: Main column
 182
 183     // START: Last column (3-month display)
 184     echo '<td class="sidecalendar">';
 185     list($prevmon, $prevyr) = calendar_sub_month($mon, $yr);
 186     list($nextmon, $nextyr) = calendar_add_month($mon, $yr);
 187     $getvars = 'id='.$courseid.'&amp;cal_d='.$day.'&amp;cal_m='.$mon.'&amp;cal_y='.$yr; // For filtering
 188
 189     echo '<div class="sideblock">';
 190     echo '<div class="header">'.get_string('eventskey', 'calendar').'</div>';
 191     echo '<div class="filters">';
 192     echo calendar_filter_controls($view, $getvars, NULL, $courses);
 193     echo '</div>';
 194     echo '</div>';
 195
 196     echo '<div class="sideblock">';
 197     echo '<div class="header">'.get_string('monthlyview', 'calendar').'</div>';
 198
 199     echo '<div class="minicalendarblock minicalendartop">';
 200     echo calendar_top_controls('display', array('id' => $courseid, 'm' => $prevmon, 'y' => $prevyr));
 201     echo calendar_get_mini($courses, $groups, $users, $prevmon, $prevyr);
 202     echo '</div><div class="minicalendarblock">';
 203     echo calendar_top_controls('display', array('id' => $courseid, 'm' => $mon, 'y' => $yr));
 204     echo calendar_get_mini($courses, $groups, $users, $mon, $yr);
 205     echo '</div><div class="minicalendarblock">';
 206     echo calendar_top_controls('display', array('id' => $courseid, 'm' => $nextmon, 'y' => $nextyr));
 207     echo calendar_get_mini($courses, $groups, $users, $nextmon, $nextyr);
 208     echo '</div>';
 209     echo '</div>';
 210
 211     echo '</td>';
 212
 213     echo '</tr></table>';
 214
 215     print_footer();
 216
 217
 218
 219 function calendar_show_day($d, $m, $y, $courses, $groups, $users, $courseid) {
 220     global $CFG, $USER;
 221
 222     if (!checkdate($m, $d, $y)) {
 223         $now = usergetdate(time());
 224         list($d, $m, $y) = array(intval($now['mday']), intval($now['mon']), intval($now['year']));
 225     }
 226
 227     $getvars = 'from=day&amp;cal_d='.$d.'&amp;cal_m='.$m.'&amp;cal_y='.$y; // For filtering
 228
 229     $starttime = make_timestamp($y, $m, $d);
 230     $endtime   = make_timestamp($y, $m, $d + 1) - 1;
 231
 232     $events = calendar_get_upcoming($courses, $groups, $users, 1, 100, $starttime);
 233
 234     $text = '';
 235     if (!isguest() && !empty($USER->id) && calendar_user_can_add_event()) {
 236         $text.= '<div class="buttons">';
 237         $text.= '<form action="'.CALENDAR_URL.'event.php" method="get">';
 238         $text.= '<div>';
 239         $text.= '<input type="hidden" name="action" value="new" />';
 240         $text.= '<input type="hidden" name="course" value="'.$courseid.'" />';
 241         $text.= '<input type="hidden" name="cal_d" value="'.$d.'" />';
 242         $text.= '<input type="hidden" name="cal_m" value="'.$m.'" />';
 243         $text.= '<input type="hidden" name="cal_y" value="'.$y.'" />';
 244         $text.= '<input type="submit" value="'.get_string('newevent', 'calendar').'" />';
 245         $text.= '</div></form></div>';
 246     }
 247
 248     $text .= get_string('dayview', 'calendar').': '.calendar_course_filter_selector($getvars);
 249
 250     echo '<div class="header">'.$text.'</div>';
 251
 252     echo '<div class="controls">'.calendar_top_controls('day', array('id' => $courseid, 'd' => $d, 'm' => $m, 'y' => $y)).'</div>';
 253
 254     if (empty($events)) {
 255         // There is nothing to display today.
 256         echo '<h3>'.get_string('daywithnoevents', 'calendar').'</h3>';
 257
 258     } else {
 259
 260         echo '<div class="eventlist">';
 261
 262         $underway = array();
 263
 264         // First, print details about events that start today
 265         foreach ($events as $event) {
 266
 267             // Set event course class if a course event
 268             if($event->courseid != 0 && $event->courseid != SITEID && $event->groupid == 0) {
 269                 $event->class = 'event_course'.array_search($event->courseid, $courses) % CALENDAR_MAXCOURSES;
 270             }
 271             $event->calendarcourseid = $courseid;
 272
 273             if ($event->timestart >= $starttime && $event->timestart <= $endtime) {  // Print it now
 274
 275
 276 /*
 277                 $dayend = calendar_day_representation($event->timestart + $event->timeduration);
 278                 $timeend = calendar_time_representation($event->timestart + $event->timeduration);
 279                 $enddate = usergetdate($event->timestart + $event->timeduration);
 280                 // Set printable representation
 281                 echo calendar_get_link_tag($dayend, CALENDAR_URL.'view.php?view=day'.$morehref.'&amp;', $enddate['mday'], $enddate['mon'], $enddate['year']).' ('.$timeend.')';
 282 */
 283                 //unset($event->time);
 284
 285                 $event->time = calendar_format_event_time($event, time(), '', false, $starttime);
 286                 calendar_print_event($event);
 287
 288             } else {                                                                 // Save this for later
 289                 $underway[] = $event;
 290             }
 291         }
 292
 293         // Then, show a list of all events that just span this day
 294         if (!empty($underway)) {
 295             echo '<h3>'.get_string('spanningevents', 'calendar').':</h3>';
 296             foreach ($underway as $event) {
 297                 $event->time = calendar_format_event_time($event, time(), '', false, $starttime);
 298                 calendar_print_event($event);
 299             }
 300         }
 301
 302         echo '</div>';
 303
 304     }
 305 }
 306
 307 function calendar_show_month_detailed($m, $y, $courses, $groups, $users, $courseid) {
 308     global $CFG, $SESSION, $USER, $CALENDARDAYS;
 309     global $day, $mon, $yr;
 310
 311     $getvars = 'from=month&amp;cal_d='.$day.'&amp;cal_m='.$mon.'&amp;cal_y='.$yr; // For filtering
 312
 313     $display = &New stdClass;
 314     $display->minwday = get_user_preferences('calendar_startwday', CALENDAR_STARTING_WEEKDAY);
 315     $display->maxwday = $display->minwday + 6;
 316
 317     if(!empty($m) && !empty($y)) {
 318         $thisdate = usergetdate(time()); // Time and day at the user's location
 319         if($m == $thisdate['mon'] && $y == $thisdate['year']) {
 320             // Navigated to this month
 321             $date = $thisdate;
 322             $display->thismonth = true;
 323         }
 324         else {
 325             // Navigated to other month, let's do a nice trick and save us a lot of work...
 326             if(!checkdate($m, 1, $y)) {
 327                 $date = array('mday' => 1, 'mon' => $thisdate['mon'], 'year' => $thisdate['year']);
 328                 $display->thismonth = true;
 329             }
 330             else {
 331                 $date = array('mday' => 1, 'mon' => $m, 'year' => $y);
 332                 $display->thismonth = false;
 333             }
 334         }
 335     }
 336     else {
 337         $date = usergetdate(time());
 338         $display->thismonth = true;
 339     }
 340
 341     // Fill in the variables we 're going to use, nice and tidy
 342     list($d, $m, $y) = array($date['mday'], $date['mon'], $date['year']); // This is what we want to display
 343     $display->maxdays = calendar_days_in_month($m, $y);
 344
 345     $startwday = 0;
 346     if (get_user_timezone_offset() < 99) {
 347         // We 'll keep these values as GMT here, and offset them when the time comes to query the db
 348         $display->tstart = gmmktime(0, 0, 0, $m, 1, $y); // This is GMT
 349         $display->tend = gmmktime(23, 59, 59, $m, $display->maxdays, $y); // GMT
 350         $startwday = gmdate('w', $display->tstart); // $display->tstart is already GMT, so don't use date(): messes with server's TZ
 351     } else {
 352         // no timezone info specified
 353         $display->tstart = mktime(0, 0, 0, $m, 1, $y);
 354         $display->tend = mktime(23, 59, 59, $m, $display->maxdays, $y);
 355         $startwday = date('w', $display->tstart); // $display->tstart not necessarily GMT, so use date()
 356     }
 357
 358     // Align the starting weekday to fall in our display range
 359     if($startwday < $display->minwday) {
 360         $startwday += 7;
 361     }
 362
 363     // Get events from database
 364     $whereclause = calendar_sql_where(usertime($display->tstart), usertime($display->tend), $users, $groups, $courses);
 365     if($whereclause === false) {
 366         $events = array();
 367     }
 368     else {
 369         $events = get_records_select('event', $whereclause, 'timestart');
 370     }
 371
 372     // Extract information: events vs. time
 373     calendar_events_by_day($events, $m, $y, $eventsbyday, $durationbyday, $typesbyday, $courses);
 374
 375     $text = '';
 376     if(!isguest() && !empty($USER->id) && calendar_user_can_add_event()) {
 377         $text.= '<div class="buttons"><form action="'.CALENDAR_URL.'event.php" method="get">';
 378         $text.= '<div>';
 379         $text.= '<input type="hidden" name="action" value="new" />';
 380         $text.= '<input type="hidden" name="course" value="'.$courseid.'" />';
 381         $text.= '<input type="hidden" name="cal_m" value="'.$m.'" />';
 382         $text.= '<input type="hidden" name="cal_y" value="'.$y.'" />';
 383         $text.= '<input type="submit" value="'.get_string('newevent', 'calendar').'" />';
 384         $text.= '</div></form></div>';
 385     }
 386
 387     $text .= get_string('detailedmonthview', 'calendar').': '.calendar_course_filter_selector($getvars);
 388
 389     echo '<div class="header">'.$text.'</div>';
 390
 391     echo '<div class="controls">';
 392     echo calendar_top_controls('month', array('id' => $courseid, 'm' => $m, 'y' => $y));
 393     echo '</div>';
 394
 395     // Start calendar display
 396     echo '<table class="calendarmonth"><tr class="weekdays">'; // Begin table. First row: day names
 397
 398     // Print out the names of the weekdays
 399     for($i = $display->minwday; $i <= $display->maxwday; ++$i) {
 400         // This uses the % operator to get the correct weekday no matter what shift we have
 401         // applied to the $display->minwday : $display->maxwday range from the default 0 : 6
 402         echo '<th scope="col">'.get_string($CALENDARDAYS[$i % 7], 'calendar').'</th>';
 403     }
 404
 405     echo '</tr><tr>'; // End of day names; prepare for day numbers
 406
 407     // For the table display. $week is the row; $dayweek is the column.
 408     $week = 1;
 409     $dayweek = $startwday;
 410
 411     // Paddding (the first week may have blank days in the beginning)
 412     for($i = $display->minwday; $i < $startwday; ++$i) {
 413         echo '<td class="nottoday">&nbsp;</td>'."\n";
 414     }
 415
 416     // Now display all the calendar
 417     for($day = 1; $day <= $display->maxdays; ++$day, ++$dayweek) {
 418         if($dayweek > $display->maxwday) {
 419             // We need to change week (table row)
 420             echo "</tr>\n<tr>";
 421             $dayweek = $display->minwday;
 422             ++$week;
 423         }
 424
 425         // Reset vars
 426         $cell = '';
 427         $dayhref = calendar_get_link_href(CALENDAR_URL.'view.php?view=day&amp;course='.$courseid.'&amp;', $day, $m, $y);
 428
 429         if(CALENDAR_WEEKEND & (1 << ($dayweek % 7))) {
 430             // Weekend. This is true no matter what the exact range is.
 431             $class = 'weekend';
 432         }
 433         else {
 434             // Normal working day.
 435             $class = '';
 436         }
 437
 438         // Special visual fx if an event is defined
 439         if(isset($eventsbyday[$day])) {
 440             if(count($eventsbyday[$day]) == 1) {
 441                 $title = get_string('oneevent', 'calendar');
 442             }
 443             else {
 444                 $title = get_string('manyevents', 'calendar', count($eventsbyday[$day]));
 445             }
 446             $cell = '<div class="day"><a href="'.$dayhref.'" title="'.$title.'">'.$day.'</a></div>';
 447         }
 448         else {
 449             $cell = '<div class="day">'.$day.'</div>';
 450         }
 451
 452         // Special visual fx if an event spans many days
 453         if(isset($typesbyday[$day]['durationglobal'])) {
 454             $class .= ' duration_global';
 455         }
 456         else if(isset($typesbyday[$day]['durationcourse'])) {
 457             $class .= ' duration_course';
 458         }
 459         else if(isset($typesbyday[$day]['durationgroup'])) {
 460             $class .= ' duration_group';
 461         }
 462         else if(isset($typesbyday[$day]['durationuser'])) {
 463             $class .= ' duration_user';
 464         }
 465
 466         // Special visual fx for today
 467         if($display->thismonth && $day == $d) {
 468             $class .= ' today';
 469         } else {
 470             $class .= ' nottoday';
 471         }
 472
 473         // Just display it
 474         if(!empty($class)) {
 475             $class = ' class="'.trim($class).'"';
 476         }
 477         echo '<td'.$class.'>'.$cell;
 478
 479         if(isset($eventsbyday[$day])) {
 480             echo '<ul class="events-new">';
 481             foreach($eventsbyday[$day] as $eventindex) {
 482
 483                 // If event has a class set then add it to the event <li> tag
 484                 $eventclass = '';
 485                 if (!empty($events[$eventindex]->class)) {
 486                     $eventclass = ' class="'.$events[$eventindex]->class.'"';
 487                 }
 488
 489                 echo '<li'.$eventclass.'><a href="'.$dayhref.'#event_'.$events[$eventindex]->id.'">'.format_string($events[$eventindex]->name, true).'</a></li>';
 490             }
 491             echo '</ul>';
 492         }
 493         if(isset($durationbyday[$day])) {
 494             echo '<ul class="events-underway">';
 495             foreach($durationbyday[$day] as $eventindex) {
 496                 echo '<li>['.format_string($events[$eventindex]->name,true).']</li>';
 497             }
 498             echo '</ul>';
 499         }
 500         echo "</td>\n";
 501     }
 502
 503     // Paddding (the last week may have blank days at the end)
 504     for($i = $dayweek; $i <= $display->maxwday; ++$i) {
 505         echo '<td class="nottoday">&nbsp;</td>';
 506     }
 507     echo "</tr>\n"; // Last row ends
 508
 509     echo "</table>\n"; // Tabular display of days ends
 510
 511 }
 512
 513 function calendar_show_upcoming_events($courses, $groups, $users, $futuredays, $maxevents, $courseid) {
 514     global $USER;
 515
 516     $events = calendar_get_upcoming($courses, $groups, $users, $futuredays, $maxevents);
 517
 518     $text = '';
 519
 520     if(!isguest() && !empty($USER->id) && calendar_user_can_add_event()) {
 521         $text.= '<div class="buttons">';
 522         $text.= '<form action="'.CALENDAR_URL.'event.php" method="get">';
 523         $text.= '<div>';
 524         $text.= '<input type="hidden" name="action" value="new" />';
 525         $text.= '<input type="hidden" name="course" value="'.$courseid.'" />';
 526         /*
 527         $text.= '<input type="hidden" name="cal_m" value="'.$m.'" />';
 528         $text.= '<input type="hidden" name="cal_y" value="'.$y.'" />';
 529         */
 530         $text.= '<input type="submit" value="'.get_string('newevent', 'calendar').'" />';
 531         $text.= '</div></form></div>';
 532     }
 533
 534     $text .= get_string('upcomingevents', 'calendar').': '.calendar_course_filter_selector('from=upcoming');
 535
 536     echo '<div class="header">'.$text.'</div>';
 537
 538     if ($events) {
 539
 540         echo '<div class="eventlist">';
 541         foreach ($events as $event) {
 542
 543             // Set event course class if a course event
 544             if($event->courseid != 0 && $event->courseid != SITEID && $event->groupid == 0) {
 545                 $event->class = 'event_course'.array_search($event->courseid, $courses) % CALENDAR_MAXCOURSES;
 546             }
 547
 548             calendar_print_event($event);
 549         }
 550         echo '</div>';
 551     } else {
 552         print_heading(get_string('noupcomingevents', 'calendar'));
 553     }
 554 }
 555
 556 function calendar_course_filter_selector($getvars = '') {
 557     global $USER, $SESSION;
 558
 559     if (empty($USER->id) or isguest()) {
 560         return '';
 561     }
 562
 563     if (has_capability('moodle/calendar:manageentries', get_context_instance(CONTEXT_SYSTEM, SITEID)) && !empty($CFG->calendar_adminseesall)) {
 564         $courses = get_courses('all', 'c.shortname','c.id,c.shortname');
 565     } else {
 566         $courses = get_my_courses($USER->id, 'shortname');
 567     }
 568
 569     unset($courses[SITEID]);
 570
 571     $courseoptions[SITEID] = get_string('fulllistofcourses');
 572     foreach ($courses as $course) {
 573         $courseoptions[$course->id] = format_string($course->shortname);
 574     }
 575
 576     if (is_numeric($SESSION->cal_courses_shown)) {
 577         $selected = $SESSION->cal_courses_shown;
 578     } else {
 579         $selected = '';
 580     }
 581
 582     return popup_form(CALENDAR_URL.'set.php?var=setcourse&amp;'.$getvars.'&amp;id=',
 583                        $courseoptions, 'cal_course_flt', $selected, '', '', '', true);
 584 }
 585
 586 ?>