calendar/renderer.php

   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', ['data-region' => 'calendar', '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 three months block (pretend block)
  55      *
  56      * This includes the previous month, the current month, and the next month
  57      *
  58      * @param calendar_information $calendar
  59      * @return string
  60      */
  61     public function fake_block_threemonths(calendar_information $calendar) {
  62         // Get the calendar type we are using.
  63         $calendartype = \core_calendar\type_factory::get_calendar_instance();
  64         $time = $calendartype->timestamp_to_date_array($calendar->time);
  65
  66         $current = $calendar->time;
  67         $prevmonthyear = $calendartype->get_prev_month($time['year'], $time['mon']);
  68         $prev = $calendartype->convert_to_timestamp(
  69                 $prevmonthyear[1],
  70                 $prevmonthyear[0],
  71                 1
  72             );
  73         $nextmonthyear = $calendartype->get_next_month($time['year'], $time['mon']);
  74         $next = $calendartype->convert_to_timestamp(
  75                 $nextmonthyear[1],
  76                 $nextmonthyear[0],
  77                 1
  78             );
  79
  80         $content = '';
  81
  82         // Previous.
  83         $calendar->set_time($prev);
  84         list($previousmonth, ) = calendar_get_view($calendar, 'minithree', false, true);
  85
  86         // Current month.
  87         $calendar->set_time($current);
  88         list($currentmonth, ) = calendar_get_view($calendar, 'minithree', false, true);
  89
  90         // Next month.
  91         $calendar->set_time($next);
  92         list($nextmonth, ) = calendar_get_view($calendar, 'minithree', false, true);
  93
  94         // Reset the time back.
  95         $calendar->set_time($current);
  96
  97         $data = (object) [
  98             'previousmonth' => $previousmonth,
  99             'currentmonth' => $currentmonth,
 100             'nextmonth' => $nextmonth,
 101         ];
 102
 103         $template = 'core_calendar/calendar_threemonth';
 104         $content .= $this->render_from_template($template, $data);
 105         return $content;
 106     }
 107
 108     /**
 109      * Adds a pretent calendar block
 110      *
 111      * @param block_contents $bc
 112      * @param mixed $pos BLOCK_POS_RIGHT | BLOCK_POS_LEFT
 113      */
 114     public function add_pretend_calendar_block(block_contents $bc, $pos=BLOCK_POS_RIGHT) {
 115         $this->page->blocks->add_fake_block($bc, $pos);
 116     }
 117
 118     /**
 119      * Creates a button to add a new event.
 120      *
 121      * @param int $courseid
 122      * @param int $unused1
 123      * @param int $unused2
 124      * @param int $unused3
 125      * @param int $unused4
 126      * @return string
 127      */
 128     public function add_event_button($courseid, $unused1 = null, $unused2 = null, $unused3 = null, $unused4 = null) {
 129         $data = [
 130             'contextid' => (\context_course::instance($courseid))->id,
 131         ];
 132         return $this->render_from_template('core_calendar/add_event_button', $data);
 133     }
 134
 135     /**
 136      * Displays an event
 137      *
 138      * @deprecated since 3.9
 139      *
 140      * @param calendar_event $event
 141      * @param bool $showactions
 142      * @return string
 143      */
 144     public function event(calendar_event $event, $showactions=true) {
 145         global $CFG;
 146         debugging('This function is no longer used', DEBUG_DEVELOPER);
 147
 148         $event = calendar_add_event_metadata($event);
 149         $context = $event->context;
 150         $output = '';
 151
 152         $output .= $this->output->box_start('card-header clearfix');
 153         if (calendar_edit_event_allowed($event) && $showactions) {
 154             if (calendar_delete_event_allowed($event)) {
 155                 $editlink = new moodle_url(CALENDAR_URL.'event.php', array('action' => 'edit', 'id' => $event->id));
 156                 $deletelink = new moodle_url(CALENDAR_URL.'delete.php', array('id' => $event->id));
 157                 if (!empty($event->calendarcourseid)) {
 158                     $editlink->param('course', $event->calendarcourseid);
 159                     $deletelink->param('course', $event->calendarcourseid);
 160                 }
 161             } else {
 162                 $params = array('update' => $event->cmid, 'return' => true, 'sesskey' => sesskey());
 163                 $editlink = new moodle_url('/course/mod.php', $params);
 164                 $deletelink = null;
 165             }
 166
 167             $commands  = html_writer::start_tag('div', array('class' => 'commands float-sm-right'));
 168             $commands .= html_writer::start_tag('a', array('href' => $editlink));
 169             $str = get_string('tt_editevent', 'calendar');
 170             $commands .= $this->output->pix_icon('t/edit', $str);
 171             $commands .= html_writer::end_tag('a');
 172             if ($deletelink != null) {
 173                 $commands .= html_writer::start_tag('a', array('href' => $deletelink));
 174                 $str = get_string('tt_deleteevent', 'calendar');
 175                 $commands .= $this->output->pix_icon('t/delete', $str);
 176                 $commands .= html_writer::end_tag('a');
 177             }
 178             $commands .= html_writer::end_tag('div');
 179             $output .= $commands;
 180         }
 181         if (!empty($event->icon)) {
 182             $output .= $event->icon;
 183         } else {
 184             $output .= $this->output->spacer(array('height' => 16, 'width' => 16));
 185         }
 186
 187         if (!empty($event->referer)) {
 188             $output .= $this->output->heading($event->referer, 3, array('class' => 'referer'));
 189         } else {
 190             $output .= $this->output->heading(
 191                 format_string($event->name, false, array('context' => $context)),
 192                 3,
 193                 array('class' => 'name d-inline-block')
 194             );
 195         }
 196         // Show subscription source if needed.
 197         if (!empty($event->subscription) && $CFG->calendar_showicalsource) {
 198             if (!empty($event->subscription->url)) {
 199                 $source = html_writer::link($event->subscription->url,
 200                         get_string('subscriptionsource', 'calendar', $event->subscription->name));
 201             } else {
 202                 // File based ical.
 203                 $source = get_string('subscriptionsource', 'calendar', $event->subscription->name);
 204             }
 205             $output .= html_writer::tag('div', $source, array('class' => 'subscription'));
 206         }
 207         if (!empty($event->courselink)) {
 208             $output .= html_writer::tag('div', $event->courselink);
 209         }
 210         if (!empty($event->time)) {
 211             $output .= html_writer::tag('span', $event->time, array('class' => 'date float-sm-right mr-1'));
 212         } else {
 213             $attrs = array('class' => 'date float-sm-right mr-1');
 214             $output .= html_writer::tag('span', calendar_time_representation($event->timestart), $attrs);
 215         }
 216
 217         if (!empty($event->actionurl)) {
 218             $actionlink = html_writer::link(new moodle_url($event->actionurl), $event->actionname);
 219             $output .= html_writer::tag('div', $actionlink, ['class' => 'action']);
 220         }
 221
 222         $output .= $this->output->box_end();
 223         $eventdetailshtml = '';
 224         $eventdetailsclasses = '';
 225
 226         $eventdetailshtml .= format_text($event->description, $event->format, array('context' => $context));
 227         $eventdetailsclasses .= 'description card-block';
 228         if (isset($event->cssclass)) {
 229             $eventdetailsclasses .= ' '.$event->cssclass;
 230         }
 231
 232         if (!empty($eventdetailshtml)) {
 233             $output .= html_writer::tag('div', $eventdetailshtml, array('class' => $eventdetailsclasses));
 234         }
 235
 236         $eventhtml = html_writer::tag('div', $output, array('class' => 'card'));
 237         return html_writer::tag('div', $eventhtml, array('class' => 'event', 'id' => 'event_' . $event->id));
 238     }
 239
 240     /**
 241      * Displays a course filter selector
 242      *
 243      * @param moodle_url $returnurl The URL that the user should be taken too upon selecting a course.
 244      * @param string $label The label to use for the course select.
 245      * @param int $courseid The id of the course to be selected.
 246      * @return string
 247      */
 248     public function course_filter_selector(moodle_url $returnurl, $label = null, $courseid = null) {
 249         global $CFG, $DB;
 250
 251         if (!isloggedin() or isguestuser()) {
 252             return '';
 253         }
 254
 255         $contextrecords = [];
 256         $courses = calendar_get_default_courses($courseid, 'id, shortname');
 257
 258         if (!empty($courses) && count($courses) > CONTEXT_CACHE_MAX_SIZE) {
 259             // We need to pull the context records from the DB to preload them
 260             // below. The calendar_get_default_courses code will actually preload
 261             // the contexts itself however the context cache is capped to a certain
 262             // amount before it starts recycling. Unfortunately that starts to happen
 263             // quite a bit if a user has access to a large number of courses (e.g. admin).
 264             // So in order to avoid hitting the DB for each context as we loop below we
 265             // can load all of the context records and add them to the cache just in time.
 266             $courseids = array_map(function($c) {
 267                 return $c->id;
 268             }, $courses);
 269             list($insql, $params) = $DB->get_in_or_equal($courseids);
 270             $contextsql = "SELECT ctx.instanceid, " . context_helper::get_preload_record_columns_sql('ctx') .
 271                           " FROM {context} ctx WHERE ctx.contextlevel = ? AND ctx.instanceid $insql";
 272             array_unshift($params, CONTEXT_COURSE);
 273             $contextrecords = $DB->get_records_sql($contextsql, $params);
 274         }
 275
 276         unset($courses[SITEID]);
 277
 278         $courseoptions = array();
 279         $courseoptions[SITEID] = get_string('fulllistofcourses');
 280         foreach ($courses as $course) {
 281             if (isset($contextrecords[$course->id])) {
 282                 context_helper::preload_from_record($contextrecords[$course->id]);
 283             }
 284             $coursecontext = context_course::instance($course->id);
 285             $courseoptions[$course->id] = format_string($course->shortname, true, array('context' => $coursecontext));
 286         }
 287
 288         if ($courseid) {
 289             $selected = $courseid;
 290         } else if ($this->page->course->id !== SITEID) {
 291             $selected = $this->page->course->id;
 292         } else {
 293             $selected = '';
 294         }
 295         $courseurl = new moodle_url($returnurl);
 296         $courseurl->remove_params('course');
 297
 298         $labelattributes = [];
 299         if (empty($label)) {
 300             $label = get_string('listofcourses');
 301             $labelattributes['class'] = 'sr-only';
 302         }
 303
 304         $select = html_writer::label($label, 'course', false, $labelattributes);
 305         $select .= html_writer::select($courseoptions, 'course', $selected, false,
 306                 ['class' => 'cal_courses_flt ml-1 mr-auto', 'id' => 'course']);
 307
 308         return $select;
 309     }
 310
 311     /**
 312      * Renders a table containing information about calendar subscriptions.
 313      *
 314      * @param int $unused
 315      * @param array $subscriptions
 316      * @param string $importresults
 317      * @return string
 318      */
 319     public function subscription_details($unused, $subscriptions, $importresults = '') {
 320         $table = new html_table();
 321         $table->head  = array(
 322             get_string('colcalendar', 'calendar'),
 323             get_string('collastupdated', 'calendar'),
 324             get_string('eventkind', 'calendar'),
 325             get_string('colpoll', 'calendar'),
 326             get_string('colactions', 'calendar')
 327         );
 328         $table->align = array('left', 'left', 'left', 'center');
 329         $table->width = '100%';
 330         $table->data  = array();
 331
 332         if (empty($subscriptions)) {
 333             $cell = new html_table_cell(get_string('nocalendarsubscriptions', 'calendar'));
 334             $cell->colspan = 5;
 335             $table->data[] = new html_table_row(array($cell));
 336         }
 337         $strnever = new lang_string('never', 'calendar');
 338         foreach ($subscriptions as $sub) {
 339             $label = $sub->name;
 340             if (!empty($sub->url)) {
 341                 $label = html_writer::link($sub->url, $label);
 342             }
 343             if (empty($sub->lastupdated)) {
 344                 $lastupdated = $strnever->out();
 345             } else {
 346                 $lastupdated = userdate($sub->lastupdated, get_string('strftimedatetimeshort', 'langconfig'));
 347             }
 348
 349             $cell = new html_table_cell($this->subscription_action_form($sub));
 350             $cell->colspan = 2;
 351             $type = $sub->eventtype . 'events';
 352
 353             $table->data[] = new html_table_row(array(
 354                 new html_table_cell($label),
 355                 new html_table_cell($lastupdated),
 356                 new html_table_cell(get_string($type, 'calendar')),
 357                 $cell
 358             ));
 359         }
 360
 361         $out  = $this->output->box_start('generalbox calendarsubs');
 362
 363         $out .= $importresults;
 364         $out .= html_writer::table($table);
 365         $out .= $this->output->box_end();
 366         return $out;
 367     }
 368
 369     /**
 370      * Creates a form to perform actions on a given subscription.
 371      *
 372      * @param stdClass $subscription
 373      * @return string
 374      */
 375     protected function subscription_action_form($subscription) {
 376         // Assemble form for the subscription row.
 377         $html = html_writer::start_tag('form', array('action' => new moodle_url('/calendar/managesubscriptions.php'), 'method' => 'post'));
 378         if (empty($subscription->url)) {
 379             // Don't update an iCal file, which has no URL.
 380             $html .= html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'pollinterval', 'value' => '0'));
 381         } else {
 382             // Assemble pollinterval control.
 383             $html .= html_writer::start_tag('div', array('style' => 'float:left;'));
 384             $html .= html_writer::start_tag('select', array('name' => 'pollinterval', 'class' => 'custom-select'));
 385             foreach (calendar_get_pollinterval_choices() as $k => $v) {
 386                 $attributes = array();
 387                 if ($k == $subscription->pollinterval) {
 388                     $attributes['selected'] = 'selected';
 389                 }
 390                 $attributes['value'] = $k;
 391                 $html .= html_writer::tag('option', $v, $attributes);
 392             }
 393             $html .= html_writer::end_tag('select');
 394             $html .= html_writer::end_tag('div');
 395         }
 396         $html .= html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'sesskey', 'value' => sesskey()));
 397         $html .= html_writer::empty_tag('input', array('type' => 'hidden', 'name' => 'id', 'value' => $subscription->id));
 398         $html .= html_writer::start_tag('div', array('class' => 'btn-group float-right'));
 399         if (!empty($subscription->url)) {
 400             $html .= html_writer::tag('button', get_string('update'), array('type'  => 'submit', 'name' => 'action',
 401                                                                             'class' => 'btn btn-secondary',
 402                                                                             'value' => CALENDAR_SUBSCRIPTION_UPDATE));
 403         }
 404         $html .= html_writer::tag('button', get_string('remove'), array('type'  => 'submit', 'name' => 'action',
 405                                                                         'class' => 'btn btn-secondary',
 406                                                                         'value' => CALENDAR_SUBSCRIPTION_REMOVE));
 407         $html .= html_writer::end_tag('div');
 408         $html .= html_writer::end_tag('form');
 409         return $html;
 410     }
 411
 412     /**
 413      * Render the event filter region.
 414      *
 415      * @return  string
 416      */
 417     public function event_filter() {
 418         $data = [
 419             'eventtypes' => calendar_get_filter_types(),
 420         ];
 421         return $this->render_from_template('core_calendar/event_filter', $data);
 422     }
 423 }