[Summary view] [Print] [Text view]

   1  <?php
   2  
   3  // This file is part of Moodle - http://moodle.org/
   4  //
   5  // Moodle is free software: you can redistribute it and/or modify
   6  // it under the terms of the GNU General Public License as published by
   7  // the Free Software Foundation, either version 3 of the License, or
   8  // (at your option) any later version.
   9  //
  10  // Moodle is distributed in the hope that it will be useful,
  11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  // GNU General Public License for more details.
  14  //
  15  // You should have received a copy of the GNU General Public License
  16  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  17  
  18  /**
  19   * This file contains the renderers for the calendar within Moodle
  20   *
  21   * @copyright 2010 Sam Hemelryk
  22   * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   * @package calendar
  24   */
  25  
  26  if (!defined('MOODLE_INTERNAL')) {
  27      die('Direct access to this script is forbidden.');    ///  It must be included from a Moodle page
  28  }
  29  
  30  /**
  31   * The primary renderer for the calendar.
  32   */
  33  class core_calendar_renderer extends plugin_renderer_base {
  34  
  35      /**
  36       * Starts the standard layout for the page
  37       *
  38       * @return string
  39       */
  40      public function start_layout() {
  41          return html_writer::start_tag('div', array('class'=>'maincalendar'));
  42      }
  43  
  44      /**
  45       * Creates the remainder of the layout
  46       *
  47       * @return string
  48       */
  49      public function complete_layout() {
  50          return html_writer::end_tag('div');
  51      }
  52  
  53      /**
  54       * Produces the content for the filters block (pretend block)
  55       *
  56       * @param int $courseid
  57       * @param int $day
  58       * @param int $month
  59       * @param int $year
  60       * @param int $view
  61       * @param int $courses
  62       * @return string
  63       */
  64      public function fake_block_filters($courseid, $day, $month, $year, $view, $courses) {
  65          $returnurl = $this->page->url;
  66          $returnurl->param('course', $courseid);
  67          return html_writer::tag('div', calendar_filter_controls($returnurl), array('class'=>'calendar_filters filters'));
  68      }
  69  
  70      /**
  71       * Produces the content for the three months block (pretend block)
  72       *
  73       * This includes the previous month, the current month, and the next month
  74       *
  75       * @param calendar_information $calendar
  76       * @return string
  77       */
  78      public function fake_block_threemonths(calendar_information $calendar) {
  79          // Get the calendar type we are using.
  80          $calendartype = \core_calendar\type_factory::get_calendar_instance();
  81  
  82          $date = $calendartype->timestamp_to_date_array($calendar->time);
  83  
  84          $prevmonth = calendar_sub_month($date['mon'], $date['year']);
  85          $prevmonthtime = $calendartype->convert_to_gregorian($prevmonth[1], $prevmonth[0], 1);
  86          $prevmonthtime = make_timestamp($prevmonthtime['year'], $prevmonthtime['month'], $prevmonthtime['day'],
  87              $prevmonthtime['hour'], $prevmonthtime['minute']);
  88  
  89          $nextmonth = calendar_add_month($date['mon'], $date['year']);
  90          $nextmonthtime = $calendartype->convert_to_gregorian($nextmonth[1], $nextmonth[0], 1);
  91          $nextmonthtime = make_timestamp($nextmonthtime['year'], $nextmonthtime['month'], $nextmonthtime['day'],
  92              $nextmonthtime['hour'], $nextmonthtime['minute']);
  93  
  94          $content  = html_writer::start_tag('div', array('class' => 'minicalendarblock'));
  95          $content .= calendar_get_mini($calendar->courses, $calendar->groups, $calendar->users, false, false, 'display', $calendar->courseid, $prevmonthtime);
  96          $content .= html_writer::end_tag('div');
  97          $content .= html_writer::start_tag('div', array('class' => 'minicalendarblock'));
  98          $content .= calendar_get_mini($calendar->courses, $calendar->groups, $calendar->users, false, false, 'display', $calendar->courseid, $calendar->time);
  99          $content .= html_writer::end_tag('div');
 100          $content .= html_writer::start_tag('div', array('class' => 'minicalendarblock'));
 101          $content .= calendar_get_mini($calendar->courses, $calendar->groups, $calendar->users, false, false, 'display', $calendar->courseid, $nextmonthtime);
 102          $content .= html_writer::end_tag('div');
 103          return $content;
 104      }
 105  
 106      /**
 107       * Adds a pretent calendar block
 108       *
 109       * @param block_contents $bc
 110       * @param mixed $pos BLOCK_POS_RIGHT | BLOCK_POS_LEFT
 111       */
 112      public function add_pretend_calendar_block(block_contents $bc, $pos=BLOCK_POS_RIGHT) {
 113          $this->page->blocks->add_fake_block($bc, $pos);
 114      }
 115  
 116      /**
 117       * Creates a button to add a new event
 118       *
 119       * @param int $courseid
 120       * @param int $day
 121       * @param int $month
 122       * @param int $year
 123       * @param int $time the unixtime, used for multiple calendar support. The values $day,
 124       *     $month and $year are kept for backwards compatibility.
 125       * @return string
 126       */
 127      protected function add_event_button($courseid, $day = null, $month = null, $year = null, $time = null) {
 128          // If a day, month and year were passed then convert it to a timestamp. If these were passed
 129          // then we can assume the day, month and year are passed as Gregorian, as no where in core
 130          // should we be passing these values rather than the time. This is done for BC.
 131          if (!empty($day) && !empty($month) && !empty($year)) {
 132              if (checkdate($month, $day, $year)) {
 133                  $time = make_timestamp($year, $month, $day);
 134              } else {
 135                  $time = time();
 136              }
 137          } else if (empty($time)) {
 138              $time = time();
 139          }
 140  
 141          $output = html_writer::start_tag('div', array('class'=>'buttons'));
 142          $output .= html_writer::start_tag('form', array('action' => CALENDAR_URL . 'event.php', 'method' => 'get'));
 143          $output .= html_writer::start_tag('div');
 144          $output .= html_writer::empty_tag('input', array('type'=>'hidden', 'name' => 'action', 'value' => 'new'));
 145          $output .= html_writer::empty_tag('input', array('type'=>'hidden', 'name' => 'course', 'value' => $courseid));
 146          $output .= html_writer::empty_tag('input', array('type'=>'hidden', 'name' => 'time', 'value' => $time));
 147          $output .= html_writer::empty_tag('input', array('type'=>'submit', 'value' => get_string('newevent', 'calendar')));
 148          $output .= html_writer::end_tag('div');
 149          $output .= html_writer::end_tag('form');
 150          $output .= html_writer::end_tag('div');
 151          return $output;
 152      }
 153  
 154      /**
 155       * Displays the calendar for a single day
 156       *
 157       * @param calendar_information $calendar
 158       * @return string
 159       */
 160      public function show_day(calendar_information $calendar, moodle_url $returnurl = null) {
 161  
 162          if ($returnurl === null) {
 163              $returnurl = $this->page->url;
 164          }
 165  
 166          $events = calendar_get_upcoming($calendar->courses, $calendar->groups, $calendar->users, 1, 100, $calendar->timestamp_today());
 167  
 168          $output  = html_writer::start_tag('div', array('class'=>'header'));
 169          $output .= $this->course_filter_selector($returnurl, get_string('dayviewfor', 'calendar'));
 170          if (calendar_user_can_add_event($calendar->course)) {
 171              $output .= $this->add_event_button($calendar->course->id, 0, 0, 0, $calendar->time);
 172          }
 173          $output .= html_writer::end_tag('div');
 174          // Controls
 175          $output .= html_writer::tag('div', calendar_top_controls('day', array('id' => $calendar->courseid, 'time' => $calendar->time)), array('class'=>'controls'));
 176  
 177          if (empty($events)) {
 178              // There is nothing to display today.
 179              $output .= html_writer::span(get_string('daywithnoevents', 'calendar'), 'calendar-information calendar-no-results');
 180          } else {
 181              $output .= html_writer::start_tag('div', array('class' => 'eventlist'));
 182              $underway = array();
 183              // First, print details about events that start today
 184              foreach ($events as $event) {
 185                  $event = new calendar_event($event);
 186                  $event->calendarcourseid = $calendar->courseid;
 187                  if ($event->timestart >= $calendar->timestamp_today() && $event->timestart <= $calendar->timestamp_tomorrow()-1) {  // Print it now
 188                      $event->time = calendar_format_event_time($event, time(), null, false, $calendar->timestamp_today());
 189                      $output .= $this->event($event);
 190                  } else {                                                                 // Save this for later
 191                      $underway[] = $event;
 192                  }
 193              }
 194  
 195              // Then, show a list of all events that just span this day
 196              if (!empty($underway)) {
 197                  $output .= html_writer::span(get_string('spanningevents', 'calendar'),
 198                      'calendar-information calendar-span-multiple-days');
 199                  foreach ($underway as $event) {
 200                      $event->time = calendar_format_event_time($event, time(), null, false, $calendar->timestamp_today());
 201                      $output .= $this->event($event);
 202                  }
 203              }
 204  
 205              $output .= html_writer::end_tag('div');
 206          }
 207  
 208          return $output;
 209      }
 210  
 211      /**
 212       * Displays an event
 213       *
 214       * @param calendar_event $event
 215       * @param bool $showactions
 216       * @return string
 217       */
 218      public function event(calendar_event $event, $showactions=true) {
 219          global $CFG;
 220  
 221          $event = calendar_add_event_metadata($event);
 222          $context = $event->context;
 223          $output = '';
 224  
 225          if (!empty($event->icon)) {
 226              $output .= $event->icon;
 227          } else {
 228              $output .= $this->output->spacer(array('height' => 16, 'width' => 16));
 229          }
 230  
 231          if (!empty($event->referer)) {
 232              $output .= $this->output->heading($event->referer, 3, array('class' => 'referer'));
 233          } else {
 234              $output .= $this->output->heading(
 235                  format_string($event->name, false, array('context' => $context)),
 236                  3,
 237                  array('class' => 'name')
 238              );
 239          }
 240          if (!empty($event->courselink)) {
 241              $output .= html_writer::tag('div', $event->courselink, array('class' => 'course'));
 242          }
 243          // Show subscription source if needed.
 244          if (!empty($event->subscription) && $CFG->calendar_showicalsource) {
 245              if (!empty($event->subscription->url)) {
 246                  $source = html_writer::link($event->subscription->url, get_string('subsource', 'calendar', $event->subscription));
 247              } else {
 248                  // File based ical.
 249                  $source = get_string('subsource', 'calendar', $event->subscription);
 250              }
 251              $output .= html_writer::tag('div', $source, array('class' => 'subscription'));
 252          }
 253          if (!empty($event->time)) {
 254              $output .= html_writer::tag('span', $event->time, array('class' => 'date'));
 255          } else {
 256              $output .= html_writer::tag('span', calendar_time_representation($event->timestart), array('class' => 'date'));
 257          }
 258  
 259          $eventdetailshtml = '';
 260          $eventdetailsclasses = '';
 261  
 262          $eventdetailshtml .= format_text($event->description, $event->format, array('context' => $context));
 263          $eventdetailsclasses .= 'description';
 264          if (isset($event->cssclass)) {
 265              $eventdetailsclasses .= ' '.$event->cssclass;
 266          }
 267  
 268          $output .= html_writer::tag('div', $eventdetailshtml, array('class' => $eventdetailsclasses));
 269  
 270          if (calendar_edit_event_allowed($event) && $showactions) {
 271              if (empty($event->cmid)) {
 272                  $editlink = new moodle_url(CALENDAR_URL.'event.php', array('action'=>'edit', 'id'=>$event->id));
 273                  $deletelink = new moodle_url(CALENDAR_URL.'delete.php', array('id'=>$event->id));
 274                  if (!empty($event->calendarcourseid)) {
 275                      $editlink->param('course', $event->calendarcourseid);
 276                      $deletelink->param('course', $event->calendarcourseid);
 277                  }
 278              } else {
 279                  $editlink = new moodle_url('/course/mod.php', array('update'=>$event->cmid, 'return'=>true, 'sesskey'=>sesskey()));
 280                  $deletelink = null;
 281              }
 282  
 283              $commands  = html_writer::start_tag('div', array('class'=>'commands'));
 284              $commands .= html_writer::start_tag('a', array('href'=>$editlink));
 285              $commands .= html_writer::empty_tag('img', array('src'=>$this->output->pix_url('t/edit'), 'alt'=>get_string('tt_editevent', 'calendar'), 'title'=>get_string('tt_editevent', 'calendar')));
 286              $commands .= html_writer::end_tag('a');
 287              if ($deletelink != null) {
 288                  $commands .= html_writer::start_tag('a', array('href'=>$deletelink));
 289                  $commands .= html_writer::empty_tag('img', array('src'=>$this->output->pix_url('t/delete'), 'alt'=>get_string('tt_deleteevent', 'calendar'), 'title'=>get_string('tt_deleteevent', 'calendar')));
 290                  $commands .= html_writer::end_tag('a');
 291              }
 292              $commands .= html_writer::end_tag('div');
 293              $output .= $commands;
 294          }
 295          return html_writer::tag('div', $output , array('class' => 'event', 'id' => 'event_' . $event->id));
 296      }
 297  
 298      /**
 299       * Displays a month in detail
 300       *
 301       * @param calendar_information $calendar
 302       * @param moodle_url $returnurl the url to return to
 303       * @return string
 304       */
 305      public function show_month_detailed(calendar_information $calendar, moodle_url $returnurl  = null) {
 306          global $CFG;
 307  
 308          if (empty($returnurl)) {
 309              $returnurl = $this->page->url;
 310          }
 311  
 312          // Get the calendar type we are using.
 313          $calendartype = \core_calendar\type_factory::get_calendar_instance();
 314  
 315          // Store the display settings.
 316          $display = new stdClass;
 317          $display->thismonth = false;
 318  
 319          // Get the specified date in the calendar type being used.
 320          $date = $calendartype->timestamp_to_date_array($calendar->time);
 321          $thisdate = $calendartype->timestamp_to_date_array(time());
 322          if ($date['mon'] == $thisdate['mon'] && $date['year'] == $thisdate['year']) {
 323              $display->thismonth = true;
 324              $date = $thisdate;
 325              $calendar->time = time();
 326          }
 327  
 328          // Get Gregorian date for the start of the month.
 329          $gregoriandate = $calendartype->convert_to_gregorian($date['year'], $date['mon'], 1);
 330          // Store the gregorian date values to be used later.
 331          list($gy, $gm, $gd, $gh, $gmin) = array($gregoriandate['year'], $gregoriandate['month'], $gregoriandate['day'],
 332              $gregoriandate['hour'], $gregoriandate['minute']);
 333  
 334          // Get the starting week day for this month.
 335          $startwday = dayofweek(1, $date['mon'], $date['year']);
 336          // Get the days in a week.
 337          $daynames = calendar_get_days();
 338          // Store the number of days in a week.
 339          $numberofdaysinweek = $calendartype->get_num_weekdays();
 340  
 341          $display->minwday = calendar_get_starting_weekday();
 342          $display->maxwday = $display->minwday + ($numberofdaysinweek - 1);
 343          $display->maxdays = calendar_days_in_month($date['mon'], $date['year']);
 344  
 345          // These are used for DB queries, so we want unixtime, so we need to use Gregorian dates.
 346          $display->tstart = make_timestamp($gy, $gm, $gd, $gh, $gmin, 0);
 347          $display->tend = $display->tstart + ($display->maxdays * DAYSECS) - 1;
 348  
 349          // Align the starting weekday to fall in our display range
 350          // This is simple, not foolproof.
 351          if ($startwday < $display->minwday) {
 352              $startwday += $numberofdaysinweek;
 353          }
 354  
 355          // Get events from database
 356          $events = calendar_get_events($display->tstart, $display->tend, $calendar->users, $calendar->groups, $calendar->courses);
 357          if (!empty($events)) {
 358              foreach($events as $eventid => $event) {
 359                  $event = new calendar_event($event);
 360                  if (!empty($event->modulename)) {
 361                      $cm = get_coursemodule_from_instance($event->modulename, $event->instance);
 362                      if (!\core_availability\info_module::is_user_visible($cm, 0, false)) {
 363                          unset($events[$eventid]);
 364                      }
 365                  }
 366              }
 367          }
 368  
 369          // Extract information: events vs. time
 370          calendar_events_by_day($events, $date['mon'], $date['year'], $eventsbyday, $durationbyday, $typesbyday, $calendar->courses);
 371  
 372          $output  = html_writer::start_tag('div', array('class'=>'header'));
 373          $output .= $this->course_filter_selector($returnurl, get_string('detailedmonthviewfor', 'calendar'));
 374          if (calendar_user_can_add_event($calendar->course)) {
 375              $output .= $this->add_event_button($calendar->course->id, 0, 0, 0, $calendar->time);
 376          }
 377          $output .= html_writer::end_tag('div', array('class'=>'header'));
 378          // Controls
 379          $output .= html_writer::tag('div', calendar_top_controls('month', array('id' => $calendar->courseid, 'time' => $calendar->time)), array('class' => 'controls'));
 380  
 381          $table = new html_table();
 382          $table->attributes = array('class'=>'calendarmonth calendartable');
 383          $table->summary = get_string('calendarheading', 'calendar', userdate($calendar->time, get_string('strftimemonthyear')));
 384          $table->data = array();
 385  
 386          // Get the day names as the header.
 387          $header = array();
 388          for($i = $display->minwday; $i <= $display->maxwday; ++$i) {
 389              $header[] = $daynames[$i % $numberofdaysinweek]['shortname'];
 390          }
 391          $table->head = $header;
 392  
 393          // For the table display. $week is the row; $dayweek is the column.
 394          $week = 1;
 395          $dayweek = $startwday;
 396  
 397          $row = new html_table_row(array());
 398  
 399          // Paddding (the first week may have blank days in the beginning)
 400          for($i = $display->minwday; $i < $startwday; ++$i) {
 401              $cell = new html_table_cell('&nbsp;');
 402              $cell->attributes = array('class'=>'nottoday dayblank');
 403              $row->cells[] = $cell;
 404          }
 405  
 406          // Now display all the calendar
 407          $weekend = CALENDAR_DEFAULT_WEEKEND;
 408          if (isset($CFG->calendar_weekend)) {
 409              $weekend = intval($CFG->calendar_weekend);
 410          }
 411  
 412          $daytime = strtotime('-1 day', $display->tstart);
 413          for ($day = 1; $day <= $display->maxdays; ++$day, ++$dayweek) {
 414              $daytime = strtotime('+1 day', $daytime);
 415              if($dayweek > $display->maxwday) {
 416                  // We need to change week (table row)
 417                  $table->data[] = $row;
 418                  $row = new html_table_row(array());
 419                  $dayweek = $display->minwday;
 420                  ++$week;
 421              }
 422  
 423              // Reset vars
 424              $cell = new html_table_cell();
 425              $dayhref = calendar_get_link_href(new moodle_url(CALENDAR_URL.'view.php', array('view' => 'day', 'course' => $calendar->courseid)), 0, 0, 0, $daytime);
 426  
 427              $cellclasses = array();
 428  
 429              if ($weekend & (1 << ($dayweek % $numberofdaysinweek))) {
 430                  // Weekend. This is true no matter what the exact range is.
 431                  $cellclasses[] = 'weekend';
 432              }
 433  
 434              // Special visual fx if an event is defined
 435              if (isset($eventsbyday[$day])) {
 436                  if(count($eventsbyday[$day]) == 1) {
 437                      $title = get_string('oneevent', 'calendar');
 438                  } else {
 439                      $title = get_string('manyevents', 'calendar', count($eventsbyday[$day]));
 440                  }
 441                  $cell->text = html_writer::tag('div', html_writer::link($dayhref, $day, array('title'=>$title)), array('class'=>'day'));
 442              } else {
 443                  $cell->text = html_writer::tag('div', $day, array('class'=>'day'));
 444              }
 445  
 446              // Special visual fx if an event spans many days
 447              $durationclass = false;
 448              if (isset($typesbyday[$day]['durationglobal'])) {
 449                  $durationclass = 'duration_global';
 450              } else if (isset($typesbyday[$day]['durationcourse'])) {
 451                  $durationclass = 'duration_course';
 452              } else if (isset($typesbyday[$day]['durationgroup'])) {
 453                  $durationclass = 'duration_group';
 454              } else if (isset($typesbyday[$day]['durationuser'])) {
 455                  $durationclass = 'duration_user';
 456              }
 457              if ($durationclass) {
 458                  $cellclasses[] = 'duration';
 459                  $cellclasses[] = $durationclass;
 460              }
 461  
 462              // Special visual fx for today
 463              if ($display->thismonth && $day == $date['mday']) {
 464                  $cellclasses[] = 'day today';
 465              } else {
 466                  $cellclasses[] = 'day nottoday';
 467              }
 468              $cell->attributes = array('class'=>join(' ',$cellclasses));
 469  
 470              if (isset($eventsbyday[$day])) {
 471                  $cell->text .= html_writer::start_tag('ul', array('class'=>'events-new'));
 472                  foreach($eventsbyday[$day] as $eventindex) {
 473                      // If event has a class set then add it to the event <li> tag
 474                      $attributes = array();
 475                      if (!empty($events[$eventindex]->class)) {
 476                          $attributes['class'] = $events[$eventindex]->class;
 477                      }
 478                      $dayhref->set_anchor('event_'.$events[$eventindex]->id);
 479                      $link = html_writer::link($dayhref, format_string($events[$eventindex]->name, true));
 480                      $cell->text .= html_writer::tag('li', $link, $attributes);
 481                  }
 482                  $cell->text .= html_writer::end_tag('ul');
 483              }
 484              if (isset($durationbyday[$day])) {
 485                  $cell->text .= html_writer::start_tag('ul', array('class'=>'events-underway'));
 486                  foreach($durationbyday[$day] as $eventindex) {
 487                      $cell->text .= html_writer::tag('li', '['.format_string($events[$eventindex]->name,true).']', array('class'=>'events-underway'));
 488                  }
 489                  $cell->text .= html_writer::end_tag('ul');
 490              }
 491              $row->cells[] = $cell;
 492          }
 493  
 494          // Paddding (the last week may have blank days at the end)
 495          for($i = $dayweek; $i <= $display->maxwday; ++$i) {
 496              $cell = new html_table_cell('&nbsp;');
 497              $cell->attributes = array('class'=>'nottoday dayblank');
 498              $row->cells[] = $cell;
 499          }
 500          $table->data[] = $row;
 501          $output .= html_writer::table($table);
 502  
 503          return $output;
 504      }
 505  
 506      /**
 507       * Displays upcoming events
 508       *
 509       * @param calendar_information $calendar
 510       * @param int $futuredays
 511       * @param int $maxevents
 512       * @return string
 513       */
 514      public function show_upcoming_events(calendar_information $calendar, $futuredays, $maxevents, moodle_url $returnurl = null) {
 515  
 516          if ($returnurl === null) {
 517              $returnurl = $this->page->url;
 518          }
 519  
 520          $events = calendar_get_upcoming($calendar->courses, $calendar->groups, $calendar->users, $futuredays, $maxevents);
 521  
 522          $output  = html_writer::start_tag('div', array('class'=>'header'));
 523          $output .= $this->course_filter_selector($returnurl, get_string('upcomingeventsfor', 'calendar'));
 524          if (calendar_user_can_add_event($calendar->course)) {
 525              $output .= $this->add_event_button($calendar->course->id);
 526          }
 527          $output .= html_writer::end_tag('div');
 528  
 529          if ($events) {
 530              $output .= html_writer::start_tag('div', array('class' => 'eventlist'));
 531              foreach ($events as $event) {
 532                  // Convert to calendar_event object so that we transform description
 533                  // accordingly
 534                  $event = new calendar_event($event);
 535                  $event->calendarcourseid = $calendar->courseid;
 536                  $output .= $this->event($event);
 537              }
 538              $output .= html_writer::end_tag('div');
 539          } else {
 540              $output .= html_writer::span(get_string('noupcomingevents', 'calendar'), 'calendar-information calendar-no-results');
 541          }
 542  
 543          return $output;
 544      }
 545  
 546      /**
 547       * Displays a course filter selector
 548       *
 549       * @param moodle_url $returnurl The URL that the user should be taken too upon selecting a course.
 550       * @param string $label The label to use for the course select.
 551       * @return string
 552       */
 553      protected function course_filter_selector(moodle_url $returnurl, $label=null) {
 554          global $USER, $SESSION, $CFG;
 555  
 556          if (!isloggedin() or isguestuser()) {
 557              return '';
 558          }
 559  
 560          if (has_capability('moodle/calendar:manageentries', context_system::instance()) && !empty($CFG->calendar_adminseesall)) {
 561              $courses = get_courses('all', 'c.shortname','c.id,c.shortname');
 562          } else {
 563              $courses = enrol_get_my_courses();
 564          }
 565  
 566          unset($courses[SITEID]);
 567  
 568          $courseoptions = array();
 569          $courseoptions[SITEID] = get_string('fulllistofcourses');
 570          foreach ($courses as $course) {
 571              $coursecontext = context_course::instance($course->id);
 572              $courseoptions[$course->id] = format_string($course->shortname, true, array('context' => $coursecontext));
 573          }
 574  
 575          if ($this->page->course->id !== SITEID) {
 576              $selected = $this->page->course->id;
 577          } else {
 578              $selected = '';
 579          }
 580          $courseurl = new moodle_url($returnurl);
 581          $courseurl->remove_params('course');
 582          $select = new single_select($courseurl, 'course', $courseoptions, $selected, null);
 583          $select->class = 'cal_courses_flt';
 584          if ($label !== null) {
 585              $select->set_label($label);
 586          } else {
 587              $select->set_label(get_string('listofcourses'), array('class' => 'accesshide'));
 588          }
 589          return $this->output->render($select);
 590      }
 591  
 592      /**
 593       * Renders a table containing information about calendar subscriptions.
 594       *
 595       * @param int $courseid
 596       * @param array $subscriptions
 597       * @param string $importresults
 598       * @return string
 599       */
 600      public function subscription_details($courseid, $subscriptions, $importresults = '') {
 601          $table = new html_table();
 602          $table->head  = array(
 603              get_string('colcalendar', 'calendar'),
 604              get_string('collastupdated', 'calendar'),
 605              get_string('eventkind', 'calendar'),
 606              get_string('colpoll', 'calendar'),
 607              get_string('colactions', 'calendar')
 608          );
 609          $table->align = array('left', 'left', 'left', 'center');
 610          $table->width = '100%';
 611          $table->data  = array();
 612  
 613          if (empty($subscriptions)) {
 614              $cell = new html_table_cell(get_string('nocalendarsubscriptions', 'calendar'));
 615              $cell->colspan = 5;
 616              $table->data[] = new html_table_row(array($cell));
 617          }
 618          $strnever = new lang_string('never', 'calendar');
 619          foreach ($subscriptions as $sub) {
 620              $label = $sub->name;
 621              if (!empty($sub->url)) {
 622                  $label = html_writer::link($sub->url, $label);
 623              }
 624              if (empty($sub->lastupdated)) {
 625                  $lastupdated = $strnever->out();
 626              } else {
 627                  $lastupdated = userdate($sub->lastupdated, get_string('strftimedatetimeshort', 'langconfig'));
 628              }
 629  
 630              $cell = new html_table_cell($this->subscription_action_form($sub, $courseid));
 631              $cell->colspan = 2;
 632              $type = $sub->eventtype . 'events';
 633  
 634              $table->data[] = new html_table_row(array(
 635                  new html_table_cell($label),
 636                  new html_table_cell($lastupdated),
 637                  new html_table_cell(get_string($type, 'calendar')),
 638                  $cell
 639              ));
 640          }
 641  
 642          $out  = $this->output->box_start('generalbox calendarsubs');
 643  
 644          $out .= $importresults;
 645          $out .= html_writer::table($table);
 646          $out .= $this->output->box_end();
 647          return $out;
 648      }
 649  
 650      /**
 651       * Creates a form to perform actions on a given subscription.
 652       *
 653       * @param stdClass $subscription
 654       * @param int $courseid
 655       * @return string
 656       */
 657      protected function subscription_action_form($subscription, $courseid) {
 658          // Assemble form for the subscription row.
 659          $html = html_writer::start_tag('form', array('action' => new moodle_url('/calendar/managesubscriptions.php'), 'method' => 'post'));
 660          if (empty($subscription->url)) {
 661              // Don't update an iCal file, which has no URL.
 662              $html .= html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'pollinterval', 'value' => '0'));
 663          } else {
 664              // Assemble pollinterval control.
 665              $html .= html_writer::start_tag('div', array('style' => 'float:left;'));
 666              $html .= html_writer::start_tag('select', array('name' => 'pollinterval'));
 667              foreach (calendar_get_pollinterval_choices() as $k => $v) {
 668                  $attributes = array();
 669                  if ($k == $subscription->pollinterval) {
 670                      $attributes['selected'] = 'selected';
 671                  }
 672                  $attributes['value'] = $k;
 673                  $html .= html_writer::tag('option', $v, $attributes);
 674              }
 675              $html .= html_writer::end_tag('select');
 676              $html .= html_writer::end_tag('div');
 677          }
 678          $html .= html_writer::start_tag('div', array('style' => 'float:right;'));
 679          $html .= html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'sesskey', 'value' => sesskey()));
 680          $html .= html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'course', 'value' => $courseid));
 681          $html .= html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'id', 'value' => $subscription->id));
 682          if (!empty($subscription->url)) {
 683              $html .= html_writer::tag('button', get_string('update'), array('type'  => 'submit', 'name' => 'action',
 684                                                                              'value' => CALENDAR_SUBSCRIPTION_UPDATE));
 685          }
 686          $html .= html_writer::tag('button', get_string('remove'), array('type'  => 'submit', 'name' => 'action',
 687                                                                          'value' => CALENDAR_SUBSCRIPTION_REMOVE));
 688          $html .= html_writer::end_tag('div');
 689          $html .= html_writer::end_tag('form');
 690          return $html;
 691      }
 692  }