File: /home/mbp/domains/mbp.ac.th/public_html/biology/calendar/renderer.php
<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* This file contains the renderers for the calendar within Moodle
*
* @copyright 2010 Sam Hemelryk
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @package calendar
*/
if (!defined('MOODLE_INTERNAL')) {
die('Direct access to this script is forbidden.'); /// It must be included from a Moodle page
}
/**
* The primary renderer for the calendar.
*/
class core_calendar_renderer extends plugin_renderer_base {
/**
* Starts the standard layout for the page
*
* @return string
*/
public function start_layout() {
return html_writer::start_tag('div', array('class'=>'maincalendar'));
}
/**
* Creates the remainder of the layout
*
* @return string
*/
public function complete_layout() {
return html_writer::end_tag('div');
}
/**
* Produces the content for the filters block (pretend block)
*
* @param int $courseid
* @param int $day
* @param int $month
* @param int $year
* @param int $view
* @param int $courses
* @return string
*/
public function fake_block_filters($courseid, $day, $month, $year, $view, $courses) {
$returnurl = $this->page->url;
$returnurl->param('course', $courseid);
return html_writer::tag('div', calendar_filter_controls($returnurl), array('class'=>'calendar_filters filters'));
}
/**
* Produces the content for the three months block (pretend block)
*
* This includes the previous month, the current month, and the next month
*
* @param calendar_information $calendar
* @return string
*/
public function fake_block_threemonths(calendar_information $calendar) {
// Get the calendar type we are using.
$calendartype = \core_calendar\type_factory::get_calendar_instance();
$date = $calendartype->timestamp_to_date_array($calendar->time);
$prevmonth = calendar_sub_month($date['mon'], $date['year']);
$prevmonthtime = $calendartype->convert_to_gregorian($prevmonth[1], $prevmonth[0], 1);
$prevmonthtime = make_timestamp($prevmonthtime['year'], $prevmonthtime['month'], $prevmonthtime['day'],
$prevmonthtime['hour'], $prevmonthtime['minute']);
$nextmonth = calendar_add_month($date['mon'], $date['year']);
$nextmonthtime = $calendartype->convert_to_gregorian($nextmonth[1], $nextmonth[0], 1);
$nextmonthtime = make_timestamp($nextmonthtime['year'], $nextmonthtime['month'], $nextmonthtime['day'],
$nextmonthtime['hour'], $nextmonthtime['minute']);
$content = html_writer::start_tag('div', array('class' => 'minicalendarblock'));
$content .= calendar_get_mini($calendar->courses, $calendar->groups, $calendar->users, false, false, 'display', $calendar->courseid, $prevmonthtime);
$content .= html_writer::end_tag('div');
$content .= html_writer::start_tag('div', array('class' => 'minicalendarblock'));
$content .= calendar_get_mini($calendar->courses, $calendar->groups, $calendar->users, false, false, 'display', $calendar->courseid, $calendar->time);
$content .= html_writer::end_tag('div');
$content .= html_writer::start_tag('div', array('class' => 'minicalendarblock'));
$content .= calendar_get_mini($calendar->courses, $calendar->groups, $calendar->users, false, false, 'display', $calendar->courseid, $nextmonthtime);
$content .= html_writer::end_tag('div');
return $content;
}
/**
* Adds a pretent calendar block
*
* @param block_contents $bc
* @param mixed $pos BLOCK_POS_RIGHT | BLOCK_POS_LEFT
*/
public function add_pretend_calendar_block(block_contents $bc, $pos=BLOCK_POS_RIGHT) {
$this->page->blocks->add_fake_block($bc, $pos);
}
/**
* Creates a button to add a new event
*
* @param int $courseid
* @param int $day
* @param int $month
* @param int $year
* @param int $time the unixtime, used for multiple calendar support. The values $day,
* $month and $year are kept for backwards compatibility.
* @return string
*/
protected function add_event_button($courseid, $day = null, $month = null, $year = null, $time = null) {
// If a day, month and year were passed then convert it to a timestamp. If these were passed
// then we can assume the day, month and year are passed as Gregorian, as no where in core
// should we be passing these values rather than the time. This is done for BC.
if (!empty($day) && !empty($month) && !empty($year)) {
if (checkdate($month, $day, $year)) {
$time = make_timestamp($year, $month, $day);
} else {
$time = time();
}
} else if (empty($time)) {
$time = time();
}
$output = html_writer::start_tag('div', array('class'=>'buttons'));
$output .= html_writer::start_tag('form', array('action' => CALENDAR_URL . 'event.php', 'method' => 'get'));
$output .= html_writer::start_tag('div');
$output .= html_writer::empty_tag('input', array('type'=>'hidden', 'name' => 'action', 'value' => 'new'));
$output .= html_writer::empty_tag('input', array('type'=>'hidden', 'name' => 'course', 'value' => $courseid));
$output .= html_writer::empty_tag('input', array('type'=>'hidden', 'name' => 'time', 'value' => $time));
$output .= html_writer::empty_tag('input', array('type'=>'submit', 'value' => get_string('newevent', 'calendar')));
$output .= html_writer::end_tag('div');
$output .= html_writer::end_tag('form');
$output .= html_writer::end_tag('div');
return $output;
}
/**
* Displays the calendar for a single day
*
* @param calendar_information $calendar
* @return string
*/
public function show_day(calendar_information $calendar, moodle_url $returnurl = null) {
if ($returnurl === null) {
$returnurl = $this->page->url;
}
$events = calendar_get_upcoming($calendar->courses, $calendar->groups, $calendar->users, 1, 100, $calendar->timestamp_today());
$output = html_writer::start_tag('div', array('class'=>'header'));
$output .= $this->course_filter_selector($returnurl, get_string('dayviewfor', 'calendar'));
if (calendar_user_can_add_event($calendar->course)) {
$output .= $this->add_event_button($calendar->course->id, 0, 0, 0, $calendar->time);
}
$output .= html_writer::end_tag('div');
// Controls
$output .= html_writer::tag('div', calendar_top_controls('day', array('id' => $calendar->courseid, 'time' => $calendar->time)), array('class'=>'controls'));
if (empty($events)) {
// There is nothing to display today.
$output .= html_writer::span(get_string('daywithnoevents', 'calendar'), 'calendar-information calendar-no-results');
} else {
$output .= html_writer::start_tag('div', array('class' => 'eventlist'));
$underway = array();
// First, print details about events that start today
foreach ($events as $event) {
$event = new calendar_event($event);
$event->calendarcourseid = $calendar->courseid;
if ($event->timestart >= $calendar->timestamp_today() && $event->timestart <= $calendar->timestamp_tomorrow()-1) { // Print it now
$event->time = calendar_format_event_time($event, time(), null, false, $calendar->timestamp_today());
$output .= $this->event($event);
} else { // Save this for later
$underway[] = $event;
}
}
// Then, show a list of all events that just span this day
if (!empty($underway)) {
$output .= html_writer::span(get_string('spanningevents', 'calendar'),
'calendar-information calendar-span-multiple-days');
foreach ($underway as $event) {
$event->time = calendar_format_event_time($event, time(), null, false, $calendar->timestamp_today());
$output .= $this->event($event);
}
}
$output .= html_writer::end_tag('div');
}
return $output;
}
/**
* Displays an event
*
* @param calendar_event $event
* @param bool $showactions
* @return string
*/
public function event(calendar_event $event, $showactions=true) {
global $CFG;
$event = calendar_add_event_metadata($event);
$context = $event->context;
$output = '';
if (!empty($event->icon)) {
$output .= $event->icon;
} else {
$output .= $this->output->spacer(array('height' => 16, 'width' => 16));
}
if (!empty($event->referer)) {
$output .= $this->output->heading($event->referer, 3, array('class' => 'referer'));
} else {
$output .= $this->output->heading(
format_string($event->name, false, array('context' => $context)),
3,
array('class' => 'name')
);
}
if (!empty($event->courselink)) {
$output .= html_writer::tag('div', $event->courselink, array('class' => 'course'));
}
// Show subscription source if needed.
if (!empty($event->subscription) && $CFG->calendar_showicalsource) {
if (!empty($event->subscription->url)) {
$source = html_writer::link($event->subscription->url, get_string('subsource', 'calendar', $event->subscription));
} else {
// File based ical.
$source = get_string('subsource', 'calendar', $event->subscription);
}
$output .= html_writer::tag('div', $source, array('class' => 'subscription'));
}
if (!empty($event->time)) {
$output .= html_writer::tag('span', $event->time, array('class' => 'date'));
} else {
$output .= html_writer::tag('span', calendar_time_representation($event->timestart), array('class' => 'date'));
}
$eventdetailshtml = '';
$eventdetailsclasses = '';
$eventdetailshtml .= format_text($event->description, $event->format, array('context' => $context));
$eventdetailsclasses .= 'description';
if (isset($event->cssclass)) {
$eventdetailsclasses .= ' '.$event->cssclass;
}
$output .= html_writer::tag('div', $eventdetailshtml, array('class' => $eventdetailsclasses));
if (calendar_edit_event_allowed($event) && $showactions) {
if (empty($event->cmid)) {
$editlink = new moodle_url(CALENDAR_URL.'event.php', array('action'=>'edit', 'id'=>$event->id));
$deletelink = new moodle_url(CALENDAR_URL.'delete.php', array('id'=>$event->id));
if (!empty($event->calendarcourseid)) {
$editlink->param('course', $event->calendarcourseid);
$deletelink->param('course', $event->calendarcourseid);
}
} else {
$editlink = new moodle_url('/course/mod.php', array('update'=>$event->cmid, 'return'=>true, 'sesskey'=>sesskey()));
$deletelink = null;
}
$commands = html_writer::start_tag('div', array('class'=>'commands'));
$commands .= html_writer::start_tag('a', array('href'=>$editlink));
$commands .= html_writer::empty_tag('img', array('src'=>$this->output->pix_url('t/edit'), 'alt'=>get_string('tt_editevent', 'calendar'), 'title'=>get_string('tt_editevent', 'calendar')));
$commands .= html_writer::end_tag('a');
if ($deletelink != null) {
$commands .= html_writer::start_tag('a', array('href'=>$deletelink));
$commands .= html_writer::empty_tag('img', array('src'=>$this->output->pix_url('t/delete'), 'alt'=>get_string('tt_deleteevent', 'calendar'), 'title'=>get_string('tt_deleteevent', 'calendar')));
$commands .= html_writer::end_tag('a');
}
$commands .= html_writer::end_tag('div');
$output .= $commands;
}
return html_writer::tag('div', $output , array('class' => 'event', 'id' => 'event_' . $event->id));
}
/**
* Displays a month in detail
*
* @param calendar_information $calendar
* @param moodle_url $returnurl the url to return to
* @return string
*/
public function show_month_detailed(calendar_information $calendar, moodle_url $returnurl = null) {
global $CFG;
if (empty($returnurl)) {
$returnurl = $this->page->url;
}
// Get the calendar type we are using.
$calendartype = \core_calendar\type_factory::get_calendar_instance();
// Store the display settings.
$display = new stdClass;
$display->thismonth = false;
// Get the specified date in the calendar type being used.
$date = $calendartype->timestamp_to_date_array($calendar->time);
$thisdate = $calendartype->timestamp_to_date_array(time());
if ($date['mon'] == $thisdate['mon'] && $date['year'] == $thisdate['year']) {
$display->thismonth = true;
$date = $thisdate;
$calendar->time = time();
}
// Get Gregorian date for the start of the month.
$gregoriandate = $calendartype->convert_to_gregorian($date['year'], $date['mon'], 1);
// Store the gregorian date values to be used later.
list($gy, $gm, $gd, $gh, $gmin) = array($gregoriandate['year'], $gregoriandate['month'], $gregoriandate['day'],
$gregoriandate['hour'], $gregoriandate['minute']);
// Get the starting week day for this month.
$startwday = dayofweek(1, $date['mon'], $date['year']);
// Get the days in a week.
$daynames = calendar_get_days();
// Store the number of days in a week.
$numberofdaysinweek = $calendartype->get_num_weekdays();
$display->minwday = calendar_get_starting_weekday();
$display->maxwday = $display->minwday + ($numberofdaysinweek - 1);
$display->maxdays = calendar_days_in_month($date['mon'], $date['year']);
// These are used for DB queries, so we want unixtime, so we need to use Gregorian dates.
$display->tstart = make_timestamp($gy, $gm, $gd, $gh, $gmin, 0);
$display->tend = $display->tstart + ($display->maxdays * DAYSECS) - 1;
// Align the starting weekday to fall in our display range
// This is simple, not foolproof.
if ($startwday < $display->minwday) {
$startwday += $numberofdaysinweek;
}
// Get events from database
$events = calendar_get_events($display->tstart, $display->tend, $calendar->users, $calendar->groups, $calendar->courses);
if (!empty($events)) {
foreach($events as $eventid => $event) {
$event = new calendar_event($event);
if (!empty($event->modulename)) {
$cm = get_coursemodule_from_instance($event->modulename, $event->instance);
if (!\core_availability\info_module::is_user_visible($cm, 0, false)) {
unset($events[$eventid]);
}
}
}
}
// Extract information: events vs. time
calendar_events_by_day($events, $date['mon'], $date['year'], $eventsbyday, $durationbyday, $typesbyday, $calendar->courses);
$output = html_writer::start_tag('div', array('class'=>'header'));
$output .= $this->course_filter_selector($returnurl, get_string('detailedmonthviewfor', 'calendar'));
if (calendar_user_can_add_event($calendar->course)) {
$output .= $this->add_event_button($calendar->course->id, 0, 0, 0, $calendar->time);
}
$output .= html_writer::end_tag('div', array('class'=>'header'));
// Controls
$output .= html_writer::tag('div', calendar_top_controls('month', array('id' => $calendar->courseid, 'time' => $calendar->time)), array('class' => 'controls'));
$table = new html_table();
$table->attributes = array('class'=>'calendarmonth calendartable');
$table->summary = get_string('calendarheading', 'calendar', userdate($calendar->time, get_string('strftimemonthyear')));
$table->data = array();
// Get the day names as the header.
$header = array();
for($i = $display->minwday; $i <= $display->maxwday; ++$i) {
$header[] = $daynames[$i % $numberofdaysinweek]['shortname'];
}
$table->head = $header;
// For the table display. $week is the row; $dayweek is the column.
$week = 1;
$dayweek = $startwday;
$row = new html_table_row(array());
// Paddding (the first week may have blank days in the beginning)
for($i = $display->minwday; $i < $startwday; ++$i) {
$cell = new html_table_cell(' ');
$cell->attributes = array('class'=>'nottoday dayblank');
$row->cells[] = $cell;
}
// Now display all the calendar
$weekend = CALENDAR_DEFAULT_WEEKEND;
if (isset($CFG->calendar_weekend)) {
$weekend = intval($CFG->calendar_weekend);
}
$daytime = strtotime('-1 day', $display->tstart);
for ($day = 1; $day <= $display->maxdays; ++$day, ++$dayweek) {
$daytime = strtotime('+1 day', $daytime);
if($dayweek > $display->maxwday) {
// We need to change week (table row)
$table->data[] = $row;
$row = new html_table_row(array());
$dayweek = $display->minwday;
++$week;
}
// Reset vars
$cell = new html_table_cell();
$dayhref = calendar_get_link_href(new moodle_url(CALENDAR_URL.'view.php', array('view' => 'day', 'course' => $calendar->courseid)), 0, 0, 0, $daytime);
$cellclasses = array();
if ($weekend & (1 << ($dayweek % $numberofdaysinweek))) {
// Weekend. This is true no matter what the exact range is.
$cellclasses[] = 'weekend';
}
// Special visual fx if an event is defined
if (isset($eventsbyday[$day])) {
if(count($eventsbyday[$day]) == 1) {
$title = get_string('oneevent', 'calendar');
} else {
$title = get_string('manyevents', 'calendar', count($eventsbyday[$day]));
}
$cell->text = html_writer::tag('div', html_writer::link($dayhref, $day, array('title'=>$title)), array('class'=>'day'));
} else {
$cell->text = html_writer::tag('div', $day, array('class'=>'day'));
}
// Special visual fx if an event spans many days
$durationclass = false;
if (isset($typesbyday[$day]['durationglobal'])) {
$durationclass = 'duration_global';
} else if (isset($typesbyday[$day]['durationcourse'])) {
$durationclass = 'duration_course';
} else if (isset($typesbyday[$day]['durationgroup'])) {
$durationclass = 'duration_group';
} else if (isset($typesbyday[$day]['durationuser'])) {
$durationclass = 'duration_user';
}
if ($durationclass) {
$cellclasses[] = 'duration';
$cellclasses[] = $durationclass;
}
// Special visual fx for today
if ($display->thismonth && $day == $date['mday']) {
$cellclasses[] = 'day today';
} else {
$cellclasses[] = 'day nottoday';
}
$cell->attributes = array('class'=>join(' ',$cellclasses));
if (isset($eventsbyday[$day])) {
$cell->text .= html_writer::start_tag('ul', array('class'=>'events-new'));
foreach($eventsbyday[$day] as $eventindex) {
// If event has a class set then add it to the event <li> tag
$attributes = array();
if (!empty($events[$eventindex]->class)) {
$attributes['class'] = $events[$eventindex]->class;
}
$dayhref->set_anchor('event_'.$events[$eventindex]->id);
$link = html_writer::link($dayhref, format_string($events[$eventindex]->name, true));
$cell->text .= html_writer::tag('li', $link, $attributes);
}
$cell->text .= html_writer::end_tag('ul');
}
if (isset($durationbyday[$day])) {
$cell->text .= html_writer::start_tag('ul', array('class'=>'events-underway'));
foreach($durationbyday[$day] as $eventindex) {
$cell->text .= html_writer::tag('li', '['.format_string($events[$eventindex]->name,true).']', array('class'=>'events-underway'));
}
$cell->text .= html_writer::end_tag('ul');
}
$row->cells[] = $cell;
}
// Paddding (the last week may have blank days at the end)
for($i = $dayweek; $i <= $display->maxwday; ++$i) {
$cell = new html_table_cell(' ');
$cell->attributes = array('class'=>'nottoday dayblank');
$row->cells[] = $cell;
}
$table->data[] = $row;
$output .= html_writer::table($table);
return $output;
}
/**
* Displays upcoming events
*
* @param calendar_information $calendar
* @param int $futuredays
* @param int $maxevents
* @return string
*/
public function show_upcoming_events(calendar_information $calendar, $futuredays, $maxevents, moodle_url $returnurl = null) {
if ($returnurl === null) {
$returnurl = $this->page->url;
}
$events = calendar_get_upcoming($calendar->courses, $calendar->groups, $calendar->users, $futuredays, $maxevents);
$output = html_writer::start_tag('div', array('class'=>'header'));
$output .= $this->course_filter_selector($returnurl, get_string('upcomingeventsfor', 'calendar'));
if (calendar_user_can_add_event($calendar->course)) {
$output .= $this->add_event_button($calendar->course->id);
}
$output .= html_writer::end_tag('div');
if ($events) {
$output .= html_writer::start_tag('div', array('class' => 'eventlist'));
foreach ($events as $event) {
// Convert to calendar_event object so that we transform description
// accordingly
$event = new calendar_event($event);
$event->calendarcourseid = $calendar->courseid;
$output .= $this->event($event);
}
$output .= html_writer::end_tag('div');
} else {
$output .= html_writer::span(get_string('noupcomingevents', 'calendar'), 'calendar-information calendar-no-results');
}
return $output;
}
/**
* Displays a course filter selector
*
* @param moodle_url $returnurl The URL that the user should be taken too upon selecting a course.
* @param string $label The label to use for the course select.
* @return string
*/
protected function course_filter_selector(moodle_url $returnurl, $label=null) {
global $USER, $SESSION, $CFG;
if (!isloggedin() or isguestuser()) {
return '';
}
if (has_capability('moodle/calendar:manageentries', context_system::instance()) && !empty($CFG->calendar_adminseesall)) {
$courses = get_courses('all', 'c.shortname','c.id,c.shortname');
} else {
$courses = enrol_get_my_courses();
}
unset($courses[SITEID]);
$courseoptions = array();
$courseoptions[SITEID] = get_string('fulllistofcourses');
foreach ($courses as $course) {
$coursecontext = context_course::instance($course->id);
$courseoptions[$course->id] = format_string($course->shortname, true, array('context' => $coursecontext));
}
if ($this->page->course->id !== SITEID) {
$selected = $this->page->course->id;
} else {
$selected = '';
}
$courseurl = new moodle_url($returnurl);
$courseurl->remove_params('course');
$select = new single_select($courseurl, 'course', $courseoptions, $selected, null);
$select->class = 'cal_courses_flt';
if ($label !== null) {
$select->set_label($label);
} else {
$select->set_label(get_string('listofcourses'), array('class' => 'accesshide'));
}
return $this->output->render($select);
}
/**
* Renders a table containing information about calendar subscriptions.
*
* @param int $courseid
* @param array $subscriptions
* @param string $importresults
* @return string
*/
public function subscription_details($courseid, $subscriptions, $importresults = '') {
$table = new html_table();
$table->head = array(
get_string('colcalendar', 'calendar'),
get_string('collastupdated', 'calendar'),
get_string('eventkind', 'calendar'),
get_string('colpoll', 'calendar'),
get_string('colactions', 'calendar')
);
$table->align = array('left', 'left', 'left', 'center');
$table->width = '100%';
$table->data = array();
if (empty($subscriptions)) {
$cell = new html_table_cell(get_string('nocalendarsubscriptions', 'calendar'));
$cell->colspan = 5;
$table->data[] = new html_table_row(array($cell));
}
$strnever = new lang_string('never', 'calendar');
foreach ($subscriptions as $sub) {
$label = $sub->name;
if (!empty($sub->url)) {
$label = html_writer::link($sub->url, $label);
}
if (empty($sub->lastupdated)) {
$lastupdated = $strnever->out();
} else {
$lastupdated = userdate($sub->lastupdated, get_string('strftimedatetimeshort', 'langconfig'));
}
$cell = new html_table_cell($this->subscription_action_form($sub, $courseid));
$cell->colspan = 2;
$type = $sub->eventtype . 'events';
$table->data[] = new html_table_row(array(
new html_table_cell($label),
new html_table_cell($lastupdated),
new html_table_cell(get_string($type, 'calendar')),
$cell
));
}
$out = $this->output->box_start('generalbox calendarsubs');
$out .= $importresults;
$out .= html_writer::table($table);
$out .= $this->output->box_end();
return $out;
}
/**
* Creates a form to perform actions on a given subscription.
*
* @param stdClass $subscription
* @param int $courseid
* @return string
*/
protected function subscription_action_form($subscription, $courseid) {
// Assemble form for the subscription row.
$html = html_writer::start_tag('form', array('action' => new moodle_url('/calendar/managesubscriptions.php'), 'method' => 'post'));
if (empty($subscription->url)) {
// Don't update an iCal file, which has no URL.
$html .= html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'pollinterval', 'value' => '0'));
} else {
// Assemble pollinterval control.
$html .= html_writer::start_tag('div', array('style' => 'float:left;'));
$html .= html_writer::start_tag('select', array('name' => 'pollinterval'));
foreach (calendar_get_pollinterval_choices() as $k => $v) {
$attributes = array();
if ($k == $subscription->pollinterval) {
$attributes['selected'] = 'selected';
}
$attributes['value'] = $k;
$html .= html_writer::tag('option', $v, $attributes);
}
$html .= html_writer::end_tag('select');
$html .= html_writer::end_tag('div');
}
$html .= html_writer::start_tag('div', array('style' => 'float:right;'));
$html .= html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'sesskey', 'value' => sesskey()));
$html .= html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'course', 'value' => $courseid));
$html .= html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'id', 'value' => $subscription->id));
if (!empty($subscription->url)) {
$html .= html_writer::tag('button', get_string('update'), array('type' => 'submit', 'name' => 'action',
'value' => CALENDAR_SUBSCRIPTION_UPDATE));
}
$html .= html_writer::tag('button', get_string('remove'), array('type' => 'submit', 'name' => 'action',
'value' => CALENDAR_SUBSCRIPTION_REMOVE));
$html .= html_writer::end_tag('div');
$html .= html_writer::end_tag('form');
return $html;
}
}