calendar/event.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     require_once('../config.php');
  42     require_once($CFG->dirroot.'/calendar/lib.php');
  43     require_once($CFG->dirroot.'/course/lib.php');
  44     require_once($CFG->dirroot.'/mod/forum/lib.php');
  45
  46     require_login();
  47
  48     $action = required_param('action', PARAM_ALPHA);
  49     $eventid = optional_param('id', 0, PARAM_INT);
  50     $eventtype = optional_param('type', 'select', PARAM_ALPHA);
  51     $urlcourse = optional_param('course', 0, PARAM_INT);
  52     $cal_y = optional_param('cal_y');
  53     $cal_m = optional_param('cal_m');
  54     $cal_d = optional_param('cal_d');
  55
  56     if(isguest()) {
  57         // Guests cannot do anything with events
  58         redirect(CALENDAR_URL.'view.php?view=upcoming&amp;course='.$urlcourse);
  59     }
  60
  61     $focus = '';
  62
  63     if(!$site = get_site()) {
  64         redirect($CFG->wwwroot.'/'.$CFG->admin.'/index.php');
  65     }
  66
  67     $strcalendar = get_string('calendar', 'calendar');
  68
  69     // Initialize the session variables
  70     calendar_session_vars();
  71
  72     $now = usergetdate(time());
  73     $navlinks = array();
  74     $calendar_navlink = array('name' => $strcalendar,
  75                           'link' =>calendar_get_link_href(CALENDAR_URL.'view.php?view=upcoming&amp;course='.$urlcourse.'&amp;',
  76                                                           $now['mday'], $now['mon'], $now['year']),
  77                           'type' => 'misc');
  78
  79     $day = intval($now['mday']);
  80     $mon = intval($now['mon']);
  81     $yr = intval($now['year']);
  82
  83     if ($usehtmleditor = can_use_richtext_editor()) {
  84         $defaultformat = FORMAT_HTML;
  85     } else {
  86         $defaultformat = FORMAT_MOODLE;
  87     }
  88
  89     // If a course has been supplied in the URL, change the filters to show that one
  90     if($urlcourse > 0 && record_exists('course', 'id', $urlcourse)) {
  91         require_login($urlcourse, false);
  92
  93         if($urlcourse == SITEID) {
  94             // If coming from the site page, show all courses
  95             $SESSION->cal_courses_shown = calendar_get_default_courses(true);
  96             calendar_set_referring_course(0);
  97         }
  98         else {
  99             // Otherwise show just this one
 100             $SESSION->cal_courses_shown = $urlcourse;
 101             calendar_set_referring_course($SESSION->cal_courses_shown);
 102         }
 103     }
 104
 105     switch($action) {
 106         case 'delete':
 107             $title = get_string('deleteevent', 'calendar');
 108             $event = get_record('event', 'id', $eventid);
 109             if($event === false) {
 110                 error('Invalid event');
 111             }
 112             if(!calendar_edit_event_allowed($event)) {
 113                 error('You are not authorized to do this');
 114             }
 115         break;
 116
 117         case 'edit':
 118             $title = get_string('editevent', 'calendar');
 119             $event = get_record('event', 'id', $eventid);
 120             $repeats = optional_param('repeats', 0, PARAM_INT);
 121
 122             if($event === false) {
 123                 error('Invalid event');
 124             }
 125             if(!calendar_edit_event_allowed($event)) {
 126                 error('You are not authorized to do this');
 127             }
 128
 129             if($form = data_submitted()) {
 130
 131                 $form->name = clean_param(strip_tags($form->name,'<lang><span>'), PARAM_CLEAN);
 132
 133                 $form->timestart = make_timestamp($form->startyr, $form->startmon, $form->startday, $form->starthr, $form->startmin);
 134                 if($form->duration == 1) {
 135                     $form->timeduration = make_timestamp($form->endyr, $form->endmon, $form->endday, $form->endhr, $form->endmin) - $form->timestart;
 136                     if($form->timeduration < 0) {
 137                         $form->timeduration = 0;
 138                     }
 139                 }
 140                 else if($form->duration == 2) {
 141                     $form->timeduration = $form->minutes * MINSECS;
 142                 }
 143                 else {
 144                     $form->timeduration = 0;
 145                 }
 146
 147                 validate_form($form, $err);
 148
 149                 if (count($err) == 0) {
 150
 151                     if($event->repeatid && $repeats) {
 152                         // Update all
 153                         if($form->timestart >= $event->timestart) {
 154                             $timestartoffset = 'timestart + '.($form->timestart - $event->timestart);
 155                         }
 156                         else {
 157                             $timestartoffset = 'timestart - '.($event->timestart - $form->timestart);
 158                         }
 159
 160                         execute_sql('UPDATE '.$CFG->prefix.'event SET '.
 161                             'name = '.$db->qstr($form->name).','.
 162                             'description = '.$db->qstr($form->description).','.
 163                             'timestart = '.$timestartoffset.','.
 164                             'timeduration = '.$form->timeduration.','.
 165                             'timemodified = '.time().' WHERE repeatid = '.$event->repeatid);
 166
 167                         /// Log the event update.
 168                         $form->name = stripslashes($form->name);  //To avoid double-slashes
 169                         add_to_log($form->courseid, 'calendar', 'edit all', 'event.php?action=edit&amp;id='.$form->id, $form->name);
 170                     }
 171
 172                     else {
 173                         // Update this
 174                         $form->timemodified = time();
 175                         update_record('event', $form);
 176
 177                         /// Log the event update.
 178                         $form->name = stripslashes($form->name);  //To avoid double-slashes
 179                         add_to_log($form->courseid, 'calendar', 'edit', 'event.php?action=edit&amp;id='.$form->id, $form->name);
 180                     }
 181
 182                     // OK, now redirect to day view
 183                     redirect(CALENDAR_URL.'view.php?view=day&amp;course='.$urlcourse.'&cal_d='.$form->startday.'&cal_m='.$form->startmon.'&cal_y='.$form->startyr);
 184                 }
 185                 else {
 186                     foreach ($err as $key => $value) {
 187                         $focus = 'form.'.$key;
 188                     }
 189                 }
 190             }
 191         break;
 192
 193         case 'new':
 194             $title = get_string('newevent', 'calendar');
 195             $form = data_submitted();
 196             if(!empty($form) && !empty($form->name)) {
 197
 198                 $form->name = clean_text(strip_tags($form->name, '<lang><span>'));
 199
 200                 $form->timestart = make_timestamp($form->startyr, $form->startmon, $form->startday, $form->starthr, $form->startmin);
 201                 if($form->duration == 1) {
 202                     $form->timeduration = make_timestamp($form->endyr, $form->endmon, $form->endday, $form->endhr, $form->endmin) - $form->timestart;
 203                     if($form->timeduration < 0) {
 204                         $form->timeduration = 0;
 205                     }
 206                 }
 207                 else if ($form->duration == 2) {
 208                     $form->timeduration = $form->minutes * MINSECS;
 209                 }
 210                 else {
 211                     $form->timeduration = 0;
 212                 }
 213                 if(!calendar_add_event_allowed($form)) {
 214                     error('You are not authorized to do this');
 215                 }
 216                 validate_form($form, $err);
 217                 if (count($err) == 0) {
 218                     $form->timemodified = time();
 219
 220                     if ($form->repeat) {
 221                         $fetch = get_record_sql('SELECT 1, MAX(repeatid) AS repeatid FROM '.$CFG->prefix.'event');
 222                         $form->repeatid = empty($fetch) ? 1 : $fetch->repeatid + 1;
 223                     }
 224
 225                     /// Get the event id for the log record.
 226                     $eventid = insert_record('event', $form, true);
 227
 228                     /// Log the event entry.
 229                     add_to_log($form->courseid, 'calendar', 'add', 'event.php?action=edit&amp;id='.$eventid, stripslashes($form->name));
 230
 231                     if ($form->repeat) {
 232                         for($i = 1; $i < $form->repeats; $i++) {
 233                             // What's the DST offset for the previous repeat?
 234                             $dst_offset_prev = dst_offset_on($form->timestart);
 235
 236                             $form->timestart += WEEKSECS;
 237
 238                             // If the offset has changed in the meantime, update this repeat accordingly
 239                             $form->timestart += $dst_offset_prev - dst_offset_on($form->timestart);
 240
 241                             /// Get the event id for the log record.
 242                             $eventid = insert_record('event', $form, true);
 243
 244                             /// Log the event entry.
 245                             add_to_log($form->courseid, 'calendar', 'add', 'event.php?action=edit&amp;id='.$eventid, stripslashes($form->name));
 246                         }
 247                     }
 248                     // OK, now redirect to day view
 249                     redirect(CALENDAR_URL.'view.php?view=day&amp;course='.$urlcourse.'&cal_d='.$form->startday.'&cal_m='.$form->startmon.'&cal_y='.$form->startyr);
 250                 }
 251                 else {
 252                     foreach ($err as $key => $value) {
 253                         $focus = 'form.'.$key;
 254                     }
 255                 }
 256             }
 257         break;
 258         default: // no action
 259             $title='';
 260         break;
 261     }
 262
 263
 264     if (!empty($SESSION->cal_course_referer)) {
 265         // TODO: This is part of the Great $course Hack in Moodle. Replace it at some point.
 266         $course = get_record('course', 'id', $SESSION->cal_course_referer);
 267     } else {
 268         $course = $site;
 269     }
 270     require_login($course, false);
 271
 272     $navlinks[] = $calendar_navlink;
 273     $navlinks[] = array('name' => $title, 'link' => null, 'type' => 'misc');
 274     $navigation = build_navigation($navlinks);
 275     print_header($site->shortname.': '.$strcalendar.': '.$title, $strcalendar, $navigation,
 276                  'eventform.name', '', true, '', user_login_string($site));
 277
 278     echo calendar_overlib_html();
 279
 280     echo '<table id="calendar">';
 281     echo '<tr><td class="maincalendar">';
 282
 283     switch($action) {
 284         case 'delete':
 285             $confirm = optional_param('confirm', 0, PARAM_INT);
 286             $repeats = optional_param('repeats', 0, PARAM_INT);
 287             if($confirm) {
 288                 // Kill it and redirect to day view
 289                 if(($event = get_record('event', 'id', $eventid)) !== false) {
 290
 291                     if($event->repeatid && $repeats) {
 292                         delete_records('event', 'repeatid', $event->repeatid);
 293                         add_to_log($event->courseid, 'calendar', 'delete all', '', $event->name);
 294                     }
 295                     else {
 296                         delete_records('event', 'id', $eventid);
 297                         add_to_log($event->courseid, 'calendar', 'delete', '', $event->name);
 298                     }
 299                 }
 300
 301                 redirect(CALENDAR_URL.'view.php?view=day&amp;course='.$urlcourse.'&cal_d='.$_REQUEST['d'].'&cal_m='.$_REQUEST['m'].'&cal_y='.$_REQUEST['y']);
 302
 303             }
 304             else {
 305                 $eventtime = usergetdate($event->timestart);
 306                 $m = $eventtime['mon'];
 307                 $d = $eventtime['mday'];
 308                 $y = $eventtime['year'];
 309
 310                 if($event->repeatid) {
 311                     $fetch = get_record_sql('SELECT 1, COUNT(id) AS repeatcount FROM '.$CFG->prefix.'event WHERE repeatid = '.$event->repeatid);
 312                     $repeatcount = $fetch->repeatcount;
 313                 }
 314                 else {
 315                     $repeatcount = 0;
 316                 }
 317
 318                 // Display confirmation form
 319                 echo '<div class="header">'.get_string('deleteevent', 'calendar').': '.$event->name.'</div>';
 320                 echo '<h2>'.get_string('confirmeventdelete', 'calendar').'</h2>';
 321                 if($repeatcount > 1) {
 322                     echo '<p>'.get_string('youcandeleteallrepeats', 'calendar', $repeatcount).'</p>';
 323                 }
 324                 echo '<div class="eventlist">';
 325                 $event->time = calendar_format_event_time($event, time(), '', false);
 326                 calendar_print_event($event);
 327                 echo '</div>';
 328                 include('event_delete.html');
 329             }
 330         break;
 331
 332         case 'edit':
 333             if(empty($form)) {
 334                 $form->name = $event->name;
 335                 $form->courseid = $event->courseid; // Not to update, but for date validation
 336                 $form->description = $event->description;
 337                 $form->timestart = $event->timestart;
 338                 $form->timeduration = $event->timeduration;
 339                 $form->id = $event->id;
 340                 $form->format = $defaultformat;
 341                 if($event->timeduration > HOURSECS) {
 342                     // More than one hour, so default to normal duration mode
 343                     $form->duration = 1;
 344                     $form->minutes = '';
 345                 }
 346                 else if($event->timeduration) {
 347                     // Up to one hour, "minutes" mode probably is better here
 348                     $form->duration = 2;
 349                     $form->minutes = $event->timeduration / MINSECS;
 350                 }
 351                 else {
 352                     // No duration
 353                     $form->duration = 0;
 354                     $form->minutes = '';
 355                 }
 356             }
 357
 358             if (!empty($form->courseid)) {
 359                 // TODO: This is part of the Great $course Hack in Moodle. Replace it at some point.
 360                 $course = get_record('course', 'id', $form->courseid);
 361             } else {
 362                 $course = $site;
 363             }
 364
 365             if($event->repeatid) {
 366                 $fetch = get_record_sql('SELECT 1, COUNT(id) AS repeatcount FROM '.$CFG->prefix.'event WHERE repeatid = '.$event->repeatid);
 367                 $repeatcount = $fetch->repeatcount;
 368             }
 369             else {
 370                 $repeatcount = 0;
 371             }
 372
 373             echo '<div class="header">'.get_string('editevent', 'calendar').'</div>';
 374             include('event_edit.html');
 375             if ($usehtmleditor) {
 376                 use_html_editor("description");
 377             }
 378         break;
 379
 380         case 'new':
 381             if($cal_y && $cal_m && $cal_d && checkdate($cal_m, $cal_d, $cal_y)) {
 382                 $form->timestart = make_timestamp($cal_y, $cal_m, $cal_d, 0, 0, 0);
 383             }
 384             else if($cal_y && $cal_m && checkdate($cal_m, 1, $cal_y)) {
 385                 if($cal_y == $now['year'] && $cal_m == $now['mon']) {
 386                     $form->timestart = make_timestamp($cal_y, $cal_m, $now['mday'], 0, 0, 0);
 387                 }
 388                 else {
 389                     $form->timestart = make_timestamp($cal_y, $cal_m, 1, 0, 0, 0);
 390                 }
 391             }
 392             if(!isset($form->timestart) or $form->timestart < 0) {
 393                 $form->timestart = time();
 394             }
 395
 396             calendar_get_allowed_types($allowed);
 397             if(!$allowed->groups && !$allowed->courses && !$allowed->site) {
 398                 // Take the shortcut
 399                 $eventtype = 'user';
 400             }
 401
 402             $header = '';
 403
 404             switch($eventtype) {
 405                 case 'user':
 406                     $form->name = '';
 407                     $form->description = '';
 408                     $form->courseid = 0;
 409                     $form->groupid = 0;
 410                     $form->userid = $USER->id;
 411                     $form->modulename = '';
 412                     $form->eventtype = '';
 413                     $form->instance = 0;
 414                     $form->timeduration = 0;
 415                     $form->duration = 0;
 416                     $form->repeat = 0;
 417                     $form->repeats = '';
 418                     $form->minutes = '';
 419                     $form->type = 'user';
 420                     $header = get_string('typeuser', 'calendar');
 421                 break;
 422                 case 'group':
 423                     $groupid = optional_param('groupid', 0, PARAM_INT);
 424                     if (! ($group = groups_get_group($groupid))) { //TODO:check.
 425                         calendar_get_allowed_types($allowed);
 426                         $eventtype = 'select';
 427                     }
 428                     else {
 429                         $form->name = '';
 430                         $form->description = '';
 431                         $form->courseid = $group->courseid;
 432                         $form->groupid = $group->id;
 433                         $form->userid = $USER->id;
 434                         $form->modulename = '';
 435                         $form->eventtype = '';
 436                         $form->instance = 0;
 437                         $form->timeduration = 0;
 438                         $form->duration = 0;
 439                         $form->repeat = 0;
 440                         $form->repeats = '';
 441                         $form->minutes = '';
 442                         $form->type = 'group';
 443                         $header = get_string('typegroup', 'calendar');
 444                     }
 445                 break;
 446                 case 'course':
 447                     $courseid = optional_param('courseid', 0, PARAM_INT);
 448                     if(!record_exists('course', 'id', $courseid)) {
 449                         calendar_get_allowed_types($allowed);
 450                         $eventtype = 'select';
 451                     }
 452                     else {
 453                         $form->name = '';
 454                         $form->description = '';
 455                         $form->courseid = $courseid;
 456                         $form->groupid = 0;
 457                         $form->userid = $USER->id;
 458                         $form->modulename = '';
 459                         $form->eventtype = '';
 460                         $form->instance = 0;
 461                         $form->timeduration = 0;
 462                         $form->duration = 0;
 463                         $form->repeat = 0;
 464                         $form->repeats = '';
 465                         $form->minutes = '';
 466                         $form->type = 'course';
 467                         $header = get_string('typecourse', 'calendar');
 468                     }
 469                 break;
 470                 case 'site':
 471                     $form->name = '';
 472                     $form->description = '';
 473                     $form->courseid = SITEID;
 474                     $form->groupid = 0;
 475                     $form->userid = $USER->id;
 476                     $form->modulename = '';
 477                     $form->eventtype = '';
 478                     $form->instance = 0;
 479                     $form->timeduration = 0;
 480                     $form->duration = 0;
 481                     $form->repeat = 0;
 482                     $form->repeats = '';
 483                     $form->minutes = '';
 484                     $form->type = 'site';
 485                     $header = get_string('typesite', 'calendar');
 486                 break;
 487                 case 'select':
 488                 break;
 489                 default:
 490                     error('Unsupported event type');
 491             }
 492
 493             $form->format = $defaultformat;
 494             if(!empty($header)) {
 495                 $header = ' ('.$header.')';
 496             }
 497
 498             echo '<div class="header">'.get_string('newevent', 'calendar').$header.'</div>';
 499
 500             if($eventtype == 'select') {
 501                 $courseid = optional_param('courseid', $SESSION->cal_course_referer, PARAM_INT);
 502                 if ($courseid == 0) { // workaround by Dan for bug #6130
 503                     $courseid = SITEID;
 504                 }
 505                 if (!$course = get_record('course', 'id', $courseid)) {
 506                     error('Incorrect course ID');
 507                 }
 508
 509                 $groupid = groups_get_course_group($course);
 510
 511                 echo '<h2>'.get_string('eventkind', 'calendar').':</h2>';
 512                 echo '<div id="selecteventtype">';
 513                 include('event_select.html');
 514                 echo '</div>';
 515             }
 516             else {
 517                 include('event_new.html');
 518                 if ($usehtmleditor) {
 519                     use_html_editor("description");
 520                 }
 521             }
 522
 523         break;
 524     }
 525     echo '</td>';
 526
 527     // START: Last column (3-month display)
 528
 529     $defaultcourses = calendar_get_default_courses();
 530     calendar_set_filters($courses, $groups, $users, $defaultcourses, $defaultcourses);
 531     list($prevmon, $prevyr) = calendar_sub_month($mon, $yr);
 532     list($nextmon, $nextyr) = calendar_add_month($mon, $yr);
 533
 534     echo '<td class="sidecalendar">';
 535     echo '<div class="sideblock">';
 536     echo '<div class="header">'.get_string('eventskey', 'calendar').'</div>';
 537     echo '<div class="filters">';
 538     echo calendar_filter_controls('event', 'action='.$action.'&amp;type='.$eventtype.'&amp;id='.$eventid);
 539     echo '</div>';
 540     echo '</div>';
 541
 542     echo '<div class="sideblock">';
 543     echo '<div class="header">'.get_string('monthlyview', 'calendar').'</div>';
 544     echo '<div class="minicalendarblock minicalendartop">';
 545     echo calendar_top_controls('display', array('id' => $urlcourse, 'm' => $prevmon, 'y' => $prevyr));
 546     echo calendar_get_mini($courses, $groups, $users, $prevmon, $prevyr);
 547     echo '</div><div class="minicalendarblock">';
 548     echo calendar_top_controls('display', array('id' => $urlcourse, 'm' => $mon, 'y' => $yr));
 549     echo calendar_get_mini($courses, $groups, $users, $mon, $yr);
 550     echo '</div><div class="minicalendarblock">';
 551     echo calendar_top_controls('display', array('id' => $urlcourse, 'm' => $nextmon, 'y' => $nextyr));
 552     echo calendar_get_mini($courses, $groups, $users, $nextmon, $nextyr);
 553     echo '</div>';
 554     echo '</div>';
 555
 556     echo '</td>';
 557     echo '</tr></table>';
 558
 559     print_footer();
 560
 561
 562 function validate_form(&$form, &$err) {
 563
 564     $form->name = trim($form->name);
 565     $form->description = trim($form->description);
 566
 567     if(empty($form->name)) {
 568         $err['name'] = get_string('errornoeventname', 'calendar');
 569     }
 570 /* Allow events without a description
 571     if(empty($form->description)) {
 572         $err['description'] = get_string('errornodescription', 'calendar');
 573     }
 574 */
 575     if(!checkdate($form->startmon, $form->startday, $form->startyr)) {
 576         $err['timestart'] = get_string('errorinvaliddate', 'calendar');
 577     }
 578     if($form->duration == 2 and !checkdate($form->endmon, $form->endday, $form->endyr)) {
 579         $err['timeduration'] = get_string('errorinvaliddate', 'calendar');
 580     }
 581     if($form->duration == 2 and !($form->minutes > 0 and $form->minutes < 1000)) {
 582         $err['minutes'] = get_string('errorinvalidminutes', 'calendar');
 583     }
 584     if (!empty($form->repeat) and !($form->repeats > 1 and $form->repeats < 100)) {
 585         $err['repeats'] = get_string('errorinvalidrepeats', 'calendar');
 586     }
 587     if(!empty($form->courseid)) {
 588         // Timestamps must be >= course startdate
 589         $course = get_record('course', 'id', $form->courseid);
 590         if($course === false) {
 591             error('Event belongs to invalid course');
 592         }
 593         else if($form->timestart < $course->startdate) {
 594             $err['timestart'] = get_string('errorbeforecoursestart', 'calendar');
 595         }
 596     }
 597 }
 598
 599 function calendar_add_event_allowed($event) {
 600     global $USER;
 601
 602     // can not be using guest account
 603     if (empty($USER->id) or $USER->username == 'guest') {
 604         return false;
 605     }
 606
 607     $sitecontext = get_context_instance(CONTEXT_SYSTEM);
 608     // if user has manageentries at site level, always return true
 609     if (has_capability('moodle/calendar:manageentries', $sitecontext)) {
 610         return true;
 611     }
 612
 613     switch ($event->type) {
 614         case 'course':
 615             return has_capability('moodle/calendar:manageentries', get_context_instance(CONTEXT_COURSE, $event->courseid));
 616
 617         case 'group':
 618             if (! groups_group_exists($event->groupid)) { //TODO:check.
 619                 return false;
 620             }
 621             // this is ok because if you have this capability at course level, you should be able
 622             // to edit group calendar too
 623             // there is no need to check membership, because if you have this capability
 624             // you will have a role in this group context
 625             return has_capability('moodle/calendar:manageentries', get_context_instance(CONTEXT_GROUP, $event->groupid));
 626
 627         case 'user':
 628             if ($event->userid == $USER->id) {
 629                 return (has_capability('moodle/calendar:manageownentries', $sitecontext));
 630             }
 631             //there is no 'break;' intentionally
 632
 633         case 'site':
 634             return has_capability('moodle/calendar:manageentries', get_context_instance(CONTEXT_COURSE, SITEID));
 635
 636         default:
 637             return false;
 638     }
 639 }
 640 ?>