calendar/externallib.php

   1 <?php
   2 // This file is part of Moodle - http://moodle.org/
   3 //
   4 // Moodle is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation, either version 3 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // Moodle is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License
  15 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16
  17
  18 /**
  19  * External calendar API
  20  *
  21  * @package    core_calendar
  22  * @category   external
  23  * @copyright  2012 Ankit Agarwal
  24  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  25  * @since Moodle 2.5
  26  */
  27
  28 defined('MOODLE_INTERNAL') || die;
  29
  30 require_once("$CFG->libdir/externallib.php");
  31
  32 use \core_calendar\local\api as local_api;
  33 use \core_calendar\local\event\container as event_container;
  34 use \core_calendar\local\event\forms\create as create_event_form;
  35 use \core_calendar\local\event\forms\update as update_event_form;
  36 use \core_calendar\local\event\mappers\create_update_form_mapper;
  37 use \core_calendar\external\event_exporter;
  38 use \core_calendar\external\events_exporter;
  39 use \core_calendar\external\events_grouped_by_course_exporter;
  40 use \core_calendar\external\events_related_objects_cache;
  41
  42 /**
  43  * Calendar external functions
  44  *
  45  * @package    core_calendar
  46  * @category   external
  47  * @copyright  2012 Ankit Agarwal
  48  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  49  * @since Moodle 2.5
  50  */
  51 class core_calendar_external extends external_api {
  52
  53
  54     /**
  55      * Returns description of method parameters
  56      *
  57      * @return external_function_parameters
  58      * @since Moodle 2.5
  59      */
  60     public static function delete_calendar_events_parameters() {
  61         return new external_function_parameters(
  62                 array('events' => new external_multiple_structure(
  63                         new external_single_structure(
  64                                 array(
  65                                         'eventid' => new external_value(PARAM_INT, 'Event ID', VALUE_REQUIRED, '', NULL_NOT_ALLOWED),
  66                                         'repeat'  => new external_value(PARAM_BOOL, 'Delete comeplete series if repeated event')
  67                                 ), 'List of events to delete'
  68                         )
  69                     )
  70                 )
  71         );
  72     }
  73
  74     /**
  75      * Delete Calendar events
  76      *
  77      * @param array $eventids A list of event ids with repeat flag to delete
  78      * @return null
  79      * @since Moodle 2.5
  80      */
  81     public static function delete_calendar_events($events) {
  82         global $CFG, $DB;
  83         require_once($CFG->dirroot."/calendar/lib.php");
  84
  85         // Parameter validation.
  86         $params = self::validate_parameters(self:: delete_calendar_events_parameters(), array('events' => $events));
  87
  88         $transaction = $DB->start_delegated_transaction();
  89
  90         foreach ($params['events'] as $event) {
  91             $eventobj = calendar_event::load($event['eventid']);
  92
  93             // Let's check if the user is allowed to delete an event.
  94             if (!calendar_delete_event_allowed($eventobj)) {
  95                 throw new moodle_exception('nopermissions', 'error', '', get_string('deleteevent', 'calendar'));
  96             }
  97             // Time to do the magic.
  98             $eventobj->delete($event['repeat']);
  99         }
 100
 101         // Everything done smoothly, let's commit.
 102         $transaction->allow_commit();
 103
 104         return null;
 105     }
 106
 107     /**
 108      * Returns description of method result value
 109      *
 110      * @return external_description
 111      * @since Moodle 2.5
 112      */
 113     public static function  delete_calendar_events_returns() {
 114         return null;
 115     }
 116
 117     /**
 118      * Returns description of method parameters
 119      *
 120      * @return external_function_parameters
 121      * @since Moodle 2.5
 122      */
 123     public static function get_calendar_events_parameters() {
 124         return new external_function_parameters(
 125                 array('events' => new external_single_structure(
 126                             array(
 127                                     'eventids' => new external_multiple_structure(
 128                                             new external_value(PARAM_INT, 'event ids')
 129                                             , 'List of event ids',
 130                                             VALUE_DEFAULT, array(), NULL_ALLOWED
 131                                                 ),
 132                                     'courseids' => new external_multiple_structure(
 133                                             new external_value(PARAM_INT, 'course ids')
 134                                             , 'List of course ids for which events will be returned',
 135                                             VALUE_DEFAULT, array(), NULL_ALLOWED
 136                                                 ),
 137                                     'groupids' => new external_multiple_structure(
 138                                             new external_value(PARAM_INT, 'group ids')
 139                                             , 'List of group ids for which events should be returned',
 140                                             VALUE_DEFAULT, array(), NULL_ALLOWED
 141                                                 )
 142                             ), 'Event details', VALUE_DEFAULT, array()),
 143                     'options' => new external_single_structure(
 144                             array(
 145                                     'userevents' => new external_value(PARAM_BOOL,
 146                                              "Set to true to return current user's user events",
 147                                              VALUE_DEFAULT, true, NULL_ALLOWED),
 148                                     'siteevents' => new external_value(PARAM_BOOL,
 149                                              "Set to true to return global events",
 150                                              VALUE_DEFAULT, true, NULL_ALLOWED),
 151                                     'timestart' => new external_value(PARAM_INT,
 152                                              "Time from which events should be returned",
 153                                              VALUE_DEFAULT, 0, NULL_ALLOWED),
 154                                     'timeend' => new external_value(PARAM_INT,
 155                                              "Time to which the events should be returned. We treat 0 and null as no end",
 156                                              VALUE_DEFAULT, 0, NULL_ALLOWED),
 157                                     'ignorehidden' => new external_value(PARAM_BOOL,
 158                                              "Ignore hidden events or not",
 159                                              VALUE_DEFAULT, true, NULL_ALLOWED),
 160
 161                             ), 'Options', VALUE_DEFAULT, array())
 162                 )
 163         );
 164     }
 165
 166     /**
 167      * Get Calendar events
 168      *
 169      * @param array $events A list of events
 170      * @param array $options various options
 171      * @return array Array of event details
 172      * @since Moodle 2.5
 173      */
 174     public static function get_calendar_events($events = array(), $options = array()) {
 175         global $SITE, $DB, $USER, $CFG;
 176         require_once($CFG->dirroot."/calendar/lib.php");
 177
 178         // Parameter validation.
 179         $params = self::validate_parameters(self::get_calendar_events_parameters(), array('events' => $events, 'options' => $options));
 180         $funcparam = array('courses' => array(), 'groups' => array());
 181         $hassystemcap = has_capability('moodle/calendar:manageentries', context_system::instance());
 182         $warnings = array();
 183
 184         // Let us findout courses that we can return events from.
 185         if (!$hassystemcap) {
 186             $courses = enrol_get_my_courses('id');
 187             $courses = array_keys($courses);
 188             foreach ($params['events']['courseids'] as $id) {
 189                try {
 190                     $context = context_course::instance($id);
 191                     self::validate_context($context);
 192                     $funcparam['courses'][] = $id;
 193                 } catch (Exception $e) {
 194                     $warnings[] = array(
 195                         'item' => 'course',
 196                         'itemid' => $id,
 197                         'warningcode' => 'nopermissions',
 198                         'message' => 'No access rights in course context '.$e->getMessage().$e->getTraceAsString()
 199                     );
 200                 }
 201             }
 202         } else {
 203             $courses = $params['events']['courseids'];
 204             $funcparam['courses'] = $courses;
 205         }
 206
 207         // Let us findout groups that we can return events from.
 208         if (!$hassystemcap) {
 209             $groups = groups_get_my_groups();
 210             $groups = array_keys($groups);
 211             foreach ($params['events']['groupids'] as $id) {
 212                 if (in_array($id, $groups)) {
 213                     $funcparam['groups'][] = $id;
 214                 } else {
 215                     $warnings[] = array('item' => $id, 'warningcode' => 'nopermissions', 'message' => 'you do not have permissions to access this group');
 216                 }
 217             }
 218         } else {
 219             $groups = $params['events']['groupids'];
 220             $funcparam['groups'] = $groups;
 221         }
 222
 223         // Do we need user events?
 224         if (!empty($params['options']['userevents'])) {
 225             $funcparam['users'] = array($USER->id);
 226         } else {
 227             $funcparam['users'] = false;
 228         }
 229
 230         // Do we need site events?
 231         if (!empty($params['options']['siteevents'])) {
 232             $funcparam['courses'][] = $SITE->id;
 233         }
 234
 235         // We treat 0 and null as no end.
 236         if (empty($params['options']['timeend'])) {
 237             $params['options']['timeend'] = PHP_INT_MAX;
 238         }
 239
 240         // Event list does not check visibility and permissions, we'll check that later.
 241         $eventlist = calendar_get_legacy_events($params['options']['timestart'], $params['options']['timeend'],
 242             $funcparam['users'], $funcparam['groups'], $funcparam['courses'], true, $params['options']['ignorehidden']);
 243
 244         // WS expects arrays.
 245         $events = array();
 246
 247         // We need to get events asked for eventids.
 248         if ($eventsbyid = calendar_get_events_by_id($params['events']['eventids'])) {
 249             $eventlist += $eventsbyid;
 250         }
 251
 252         foreach ($eventlist as $eventid => $eventobj) {
 253             $event = (array) $eventobj;
 254             // Description formatting.
 255             $calendareventobj = new calendar_event($event);
 256             list($event['description'], $event['format']) = $calendareventobj->format_external_text();
 257
 258             if ($hassystemcap) {
 259                 // User can see everything, no further check is needed.
 260                 $events[$eventid] = $event;
 261             } else if (!empty($eventobj->modulename)) {
 262                 $courseid = $eventobj->courseid;
 263                 if (!$courseid) {
 264                     if (!$calendareventobj->context || !($context = $calendareventobj->context->get_course_context(false))) {
 265                         continue;
 266                     }
 267                     $courseid = $context->instanceid;
 268                 }
 269                 $instances = get_fast_modinfo($courseid)->get_instances_of($eventobj->modulename);
 270                 if (!empty($instances[$eventobj->instance]->uservisible)) {
 271                     $events[$eventid] = $event;
 272                 }
 273             } else {
 274                 // Can the user actually see this event?
 275                 $eventobj = calendar_event::load($eventobj);
 276                 if (($eventobj->courseid == $SITE->id) ||
 277                             (!empty($eventobj->groupid) && in_array($eventobj->groupid, $groups)) ||
 278                             (!empty($eventobj->courseid) && in_array($eventobj->courseid, $courses)) ||
 279                             ($USER->id == $eventobj->userid) ||
 280                             (calendar_edit_event_allowed($eventobj))) {
 281                     $events[$eventid] = $event;
 282                 } else {
 283                     $warnings[] = array('item' => $eventid, 'warningcode' => 'nopermissions', 'message' => 'you do not have permissions to view this event');
 284                 }
 285             }
 286         }
 287         return array('events' => $events, 'warnings' => $warnings);
 288     }
 289
 290     /**
 291      * Returns description of method result value
 292      *
 293      * @return external_description
 294      * @since Moodle 2.5
 295      */
 296     public static function  get_calendar_events_returns() {
 297         return new external_single_structure(array(
 298                 'events' => new external_multiple_structure( new external_single_structure(
 299                         array(
 300                             'id' => new external_value(PARAM_INT, 'event id'),
 301                             'name' => new external_value(PARAM_TEXT, 'event name'),
 302                             'description' => new external_value(PARAM_RAW, 'Description', VALUE_OPTIONAL, null, NULL_ALLOWED),
 303                             'format' => new external_format_value('description'),
 304                             'courseid' => new external_value(PARAM_INT, 'course id'),
 305                             'groupid' => new external_value(PARAM_INT, 'group id'),
 306                             'userid' => new external_value(PARAM_INT, 'user id'),
 307                             'repeatid' => new external_value(PARAM_INT, 'repeat id'),
 308                             'modulename' => new external_value(PARAM_TEXT, 'module name', VALUE_OPTIONAL, null, NULL_ALLOWED),
 309                             'instance' => new external_value(PARAM_INT, 'instance id'),
 310                             'eventtype' => new external_value(PARAM_TEXT, 'Event type'),
 311                             'timestart' => new external_value(PARAM_INT, 'timestart'),
 312                             'timeduration' => new external_value(PARAM_INT, 'time duration'),
 313                             'visible' => new external_value(PARAM_INT, 'visible'),
 314                             'uuid' => new external_value(PARAM_TEXT, 'unique id of ical events', VALUE_OPTIONAL, null, NULL_NOT_ALLOWED),
 315                             'sequence' => new external_value(PARAM_INT, 'sequence'),
 316                             'timemodified' => new external_value(PARAM_INT, 'time modified'),
 317                             'subscriptionid' => new external_value(PARAM_INT, 'Subscription id', VALUE_OPTIONAL, null, NULL_ALLOWED),
 318                         ), 'event')
 319                  ),
 320                  'warnings' => new external_warnings()
 321                 )
 322         );
 323     }
 324
 325     /**
 326      * Returns description of method parameters.
 327      *
 328      * @since Moodle 3.3
 329      * @return external_function_parameters
 330      */
 331     public static function get_calendar_action_events_by_timesort_parameters() {
 332         return new external_function_parameters(
 333             array(
 334                 'timesortfrom' => new external_value(PARAM_INT, 'Time sort from', VALUE_DEFAULT, 0),
 335                 'timesortto' => new external_value(PARAM_INT, 'Time sort to', VALUE_DEFAULT, null),
 336                 'aftereventid' => new external_value(PARAM_INT, 'The last seen event id', VALUE_DEFAULT, 0),
 337                 'limitnum' => new external_value(PARAM_INT, 'Limit number', VALUE_DEFAULT, 20)
 338             )
 339         );
 340     }
 341
 342     /**
 343      * Get calendar action events based on the timesort value.
 344      *
 345      * @since Moodle 3.3
 346      * @param null|int $timesortfrom Events after this time (inclusive)
 347      * @param null|int $timesortto Events before this time (inclusive)
 348      * @param null|int $aftereventid Get events with ids greater than this one
 349      * @param int $limitnum Limit the number of results to this value
 350      * @return array
 351      */
 352     public static function get_calendar_action_events_by_timesort($timesortfrom = 0, $timesortto = null,
 353                                                        $aftereventid = 0, $limitnum = 20) {
 354         global $CFG, $PAGE, $USER;
 355
 356         require_once($CFG->dirroot . '/calendar/lib.php');
 357
 358         $user = null;
 359         $params = self::validate_parameters(
 360             self::get_calendar_action_events_by_timesort_parameters(),
 361             [
 362                 'timesortfrom' => $timesortfrom,
 363                 'timesortto' => $timesortto,
 364                 'aftereventid' => $aftereventid,
 365                 'limitnum' => $limitnum,
 366             ]
 367         );
 368         $context = \context_user::instance($USER->id);
 369         self::validate_context($context);
 370
 371         if (empty($params['aftereventid'])) {
 372             $params['aftereventid'] = null;
 373         }
 374
 375         $renderer = $PAGE->get_renderer('core_calendar');
 376         $events = local_api::get_action_events_by_timesort(
 377             $params['timesortfrom'],
 378             $params['timesortto'],
 379             $params['aftereventid'],
 380             $params['limitnum']
 381         );
 382
 383         $exportercache = new events_related_objects_cache($events);
 384         $exporter = new events_exporter($events, ['cache' => $exportercache]);
 385
 386         return $exporter->export($renderer);
 387     }
 388
 389     /**
 390      * Returns description of method result value.
 391      *
 392      * @since Moodle 3.3
 393      * @return external_description
 394      */
 395     public static function get_calendar_action_events_by_timesort_returns() {
 396         return events_exporter::get_read_structure();
 397     }
 398
 399     /**
 400      * Returns description of method parameters.
 401      *
 402      * @return external_function_parameters
 403      */
 404     public static function get_calendar_action_events_by_course_parameters() {
 405         return new external_function_parameters(
 406             array(
 407                 'courseid' => new external_value(PARAM_INT, 'Course id'),
 408                 'timesortfrom' => new external_value(PARAM_INT, 'Time sort from', VALUE_DEFAULT, null),
 409                 'timesortto' => new external_value(PARAM_INT, 'Time sort to', VALUE_DEFAULT, null),
 410                 'aftereventid' => new external_value(PARAM_INT, 'The last seen event id', VALUE_DEFAULT, 0),
 411                 'limitnum' => new external_value(PARAM_INT, 'Limit number', VALUE_DEFAULT, 20)
 412             )
 413         );
 414     }
 415
 416     /**
 417      * Get calendar action events for the given course.
 418      *
 419      * @since Moodle 3.3
 420      * @param int $courseid Only events in this course
 421      * @param null|int $timesortfrom Events after this time (inclusive)
 422      * @param null|int $timesortto Events before this time (inclusive)
 423      * @param null|int $aftereventid Get events with ids greater than this one
 424      * @param int $limitnum Limit the number of results to this value
 425      * @return array
 426      */
 427     public static function get_calendar_action_events_by_course(
 428         $courseid, $timesortfrom = null, $timesortto = null, $aftereventid = 0, $limitnum = 20) {
 429
 430         global $CFG, $PAGE, $USER;
 431
 432         require_once($CFG->dirroot . '/calendar/lib.php');
 433
 434         $user = null;
 435         $params = self::validate_parameters(
 436             self::get_calendar_action_events_by_course_parameters(),
 437             [
 438                 'courseid' => $courseid,
 439                 'timesortfrom' => $timesortfrom,
 440                 'timesortto' => $timesortto,
 441                 'aftereventid' => $aftereventid,
 442                 'limitnum' => $limitnum,
 443             ]
 444         );
 445         $context = \context_user::instance($USER->id);
 446         self::validate_context($context);
 447
 448         if (empty($params['aftereventid'])) {
 449             $params['aftereventid'] = null;
 450         }
 451
 452         $courses = enrol_get_my_courses('*', 'visible DESC,sortorder ASC', 0, [$courseid]);
 453         $courses = array_values($courses);
 454
 455         if (empty($courses)) {
 456             return [];
 457         }
 458
 459         $course = $courses[0];
 460         $renderer = $PAGE->get_renderer('core_calendar');
 461         $events = local_api::get_action_events_by_course(
 462             $course,
 463             $params['timesortfrom'],
 464             $params['timesortto'],
 465             $params['aftereventid'],
 466             $params['limitnum']
 467         );
 468
 469         $exportercache = new events_related_objects_cache($events, $courses);
 470         $exporter = new events_exporter($events, ['cache' => $exportercache]);
 471
 472         return $exporter->export($renderer);
 473     }
 474
 475     /**
 476      * Returns description of method result value.
 477      *
 478      * @return external_description
 479      */
 480     public static function get_calendar_action_events_by_course_returns() {
 481         return events_exporter::get_read_structure();
 482     }
 483
 484     /**
 485      * Returns description of method parameters.
 486      *
 487      * @return external_function_parameters
 488      */
 489     public static function get_calendar_action_events_by_courses_parameters() {
 490         return new external_function_parameters(
 491             array(
 492                 'courseids' => new external_multiple_structure(
 493                     new external_value(PARAM_INT, 'Course id')
 494                 ),
 495                 'timesortfrom' => new external_value(PARAM_INT, 'Time sort from', VALUE_DEFAULT, null),
 496                 'timesortto' => new external_value(PARAM_INT, 'Time sort to', VALUE_DEFAULT, null),
 497                 'limitnum' => new external_value(PARAM_INT, 'Limit number', VALUE_DEFAULT, 10)
 498             )
 499         );
 500     }
 501
 502     /**
 503      * Get calendar action events for a given list of courses.
 504      *
 505      * @since Moodle 3.3
 506      * @param array $courseids Only include events for these courses
 507      * @param null|int $timesortfrom Events after this time (inclusive)
 508      * @param null|int $timesortto Events before this time (inclusive)
 509      * @param int $limitnum Limit the number of results per course to this value
 510      * @return array
 511      */
 512     public static function get_calendar_action_events_by_courses(
 513         array $courseids, $timesortfrom = null, $timesortto = null, $limitnum = 10) {
 514
 515         global $CFG, $PAGE, $USER;
 516
 517         require_once($CFG->dirroot . '/calendar/lib.php');
 518
 519         $user = null;
 520         $params = self::validate_parameters(
 521             self::get_calendar_action_events_by_courses_parameters(),
 522             [
 523                 'courseids' => $courseids,
 524                 'timesortfrom' => $timesortfrom,
 525                 'timesortto' => $timesortto,
 526                 'limitnum' => $limitnum,
 527             ]
 528         );
 529         $context = \context_user::instance($USER->id);
 530         self::validate_context($context);
 531
 532         if (empty($params['courseids'])) {
 533             return ['groupedbycourse' => []];
 534         }
 535
 536         $renderer = $PAGE->get_renderer('core_calendar');
 537         $courses = enrol_get_my_courses('*', 'visible DESC,sortorder ASC', 0, $params['courseids']);
 538         $courses = array_values($courses);
 539
 540         if (empty($courses)) {
 541             return ['groupedbycourse' => []];
 542         }
 543
 544         $events = local_api::get_action_events_by_courses(
 545             $courses,
 546             $params['timesortfrom'],
 547             $params['timesortto'],
 548             $params['limitnum']
 549         );
 550
 551         if (empty($events)) {
 552             return ['groupedbycourse' => []];
 553         }
 554
 555         $exportercache = new events_related_objects_cache($events, $courses);
 556         $exporter = new events_grouped_by_course_exporter($events, ['cache' => $exportercache]);
 557
 558         return $exporter->export($renderer);
 559     }
 560
 561     /**
 562      * Returns description of method result value.
 563      *
 564      * @return external_description
 565      */
 566     public static function get_calendar_action_events_by_courses_returns() {
 567         return events_grouped_by_course_exporter::get_read_structure();
 568     }
 569
 570     /**
 571      * Returns description of method parameters.
 572      *
 573      * @return external_function_parameters.
 574      * @since Moodle 2.5
 575      */
 576     public static function create_calendar_events_parameters() {
 577         // Userid is always current user, so no need to get it from client.
 578         // Module based calendar events are not allowed here. Hence no need of instance and modulename.
 579         // subscription id and uuid is not allowed as this is not an ical api.
 580         return new external_function_parameters(
 581                 array('events' => new external_multiple_structure(
 582                         new external_single_structure(
 583                             array(
 584                                 'name' => new external_value(PARAM_TEXT, 'event name', VALUE_REQUIRED, '', NULL_NOT_ALLOWED),
 585                                 'description' => new external_value(PARAM_RAW, 'Description', VALUE_DEFAULT, null, NULL_ALLOWED),
 586                                 'format' => new external_format_value('description', VALUE_DEFAULT),
 587                                 'courseid' => new external_value(PARAM_INT, 'course id', VALUE_DEFAULT, 0, NULL_NOT_ALLOWED),
 588                                 'groupid' => new external_value(PARAM_INT, 'group id', VALUE_DEFAULT, 0, NULL_NOT_ALLOWED),
 589                                 'repeats' => new external_value(PARAM_INT, 'number of repeats', VALUE_DEFAULT, 0, NULL_NOT_ALLOWED),
 590                                 'eventtype' => new external_value(PARAM_TEXT, 'Event type', VALUE_DEFAULT, 'user', NULL_NOT_ALLOWED),
 591                                 'timestart' => new external_value(PARAM_INT, 'timestart', VALUE_DEFAULT, time(), NULL_NOT_ALLOWED),
 592                                 'timeduration' => new external_value(PARAM_INT, 'time duration', VALUE_DEFAULT, 0, NULL_NOT_ALLOWED),
 593                                 'visible' => new external_value(PARAM_INT, 'visible', VALUE_DEFAULT, 1, NULL_NOT_ALLOWED),
 594                                 'sequence' => new external_value(PARAM_INT, 'sequence', VALUE_DEFAULT, 1, NULL_NOT_ALLOWED),
 595                             ), 'event')
 596                 )
 597             )
 598         );
 599     }
 600
 601     /**
 602      * Delete Calendar events.
 603      *
 604      * @param array $events A list of events to create.
 605      * @return array array of events created.
 606      * @since Moodle 2.5
 607      * @throws moodle_exception if user doesnt have the permission to create events.
 608      */
 609     public static function create_calendar_events($events) {
 610         global $CFG, $DB, $USER;
 611         require_once($CFG->dirroot."/calendar/lib.php");
 612
 613         // Parameter validation.
 614         $params = self::validate_parameters(self::create_calendar_events_parameters(), array('events' => $events));
 615
 616         $transaction = $DB->start_delegated_transaction();
 617         $return = array();
 618         $warnings = array();
 619
 620         foreach ($params['events'] as $event) {
 621
 622             // Let us set some defaults.
 623             $event['userid'] = $USER->id;
 624             $event['modulename'] = '';
 625             $event['instance'] = 0;
 626             $event['subscriptionid'] = null;
 627             $event['uuid']= '';
 628             $event['format'] = external_validate_format($event['format']);
 629             if ($event['repeats'] > 0) {
 630                 $event['repeat'] = 1;
 631             } else {
 632                 $event['repeat'] = 0;
 633             }
 634
 635             $eventobj = new calendar_event($event);
 636
 637             // Let's check if the user is allowed to delete an event.
 638             if (!calendar_add_event_allowed($eventobj)) {
 639                 $warnings [] = array('item' => $event['name'], 'warningcode' => 'nopermissions', 'message' => 'you do not have permissions to create this event');
 640                 continue;
 641             }
 642             // Let's create the event.
 643             $var = $eventobj->create($event);
 644             $var = (array)$var->properties();
 645             if ($event['repeat']) {
 646                 $children = $DB->get_records('event', array('repeatid' => $var['id']));
 647                 foreach ($children as $child) {
 648                     $return[] = (array) $child;
 649                 }
 650             } else {
 651                 $return[] = $var;
 652             }
 653         }
 654
 655         // Everything done smoothly, let's commit.
 656         $transaction->allow_commit();
 657         return array('events' => $return, 'warnings' => $warnings);
 658     }
 659
 660     /**
 661      * Returns description of method result value.
 662      *
 663      * @return external_description.
 664      * @since Moodle 2.5
 665      */
 666     public static function  create_calendar_events_returns() {
 667             return new external_single_structure(
 668                     array(
 669                         'events' => new external_multiple_structure( new external_single_structure(
 670                                 array(
 671                                     'id' => new external_value(PARAM_INT, 'event id'),
 672                                     'name' => new external_value(PARAM_TEXT, 'event name'),
 673                                     'description' => new external_value(PARAM_RAW, 'Description', VALUE_OPTIONAL),
 674                                     'format' => new external_format_value('description'),
 675                                     'courseid' => new external_value(PARAM_INT, 'course id'),
 676                                     'groupid' => new external_value(PARAM_INT, 'group id'),
 677                                     'userid' => new external_value(PARAM_INT, 'user id'),
 678                                     'repeatid' => new external_value(PARAM_INT, 'repeat id', VALUE_OPTIONAL),
 679                                     'modulename' => new external_value(PARAM_TEXT, 'module name', VALUE_OPTIONAL),
 680                                     'instance' => new external_value(PARAM_INT, 'instance id'),
 681                                     'eventtype' => new external_value(PARAM_TEXT, 'Event type'),
 682                                     'timestart' => new external_value(PARAM_INT, 'timestart'),
 683                                     'timeduration' => new external_value(PARAM_INT, 'time duration'),
 684                                     'visible' => new external_value(PARAM_INT, 'visible'),
 685                                     'uuid' => new external_value(PARAM_TEXT, 'unique id of ical events', VALUE_OPTIONAL, '', NULL_NOT_ALLOWED),
 686                                     'sequence' => new external_value(PARAM_INT, 'sequence'),
 687                                     'timemodified' => new external_value(PARAM_INT, 'time modified'),
 688                                     'subscriptionid' => new external_value(PARAM_INT, 'Subscription id', VALUE_OPTIONAL),
 689                                 ), 'event')
 690                         ),
 691                       'warnings' => new external_warnings()
 692                     )
 693             );
 694     }
 695
 696     /**
 697      * Returns description of method parameters.
 698      *
 699      * @return external_function_parameters
 700      */
 701     public static function get_calendar_event_by_id_parameters() {
 702         return new external_function_parameters(
 703             array(
 704                 'eventid' => new external_value(PARAM_INT, 'The event id to be retrieved'),
 705             )
 706         );
 707     }
 708
 709     /**
 710      * Get calendar event by id.
 711      *
 712      * @param int $eventid The calendar event id to be retrieved.
 713      * @return array Array of event details
 714      */
 715     public static function get_calendar_event_by_id($eventid) {
 716         global $CFG, $PAGE, $USER;
 717         require_once($CFG->dirroot."/calendar/lib.php");
 718
 719         $params = self::validate_parameters(self::get_calendar_event_by_id_parameters(), ['eventid' => $eventid]);
 720         $context = \context_user::instance($USER->id);
 721
 722         self::validate_context($context);
 723         $warnings = array();
 724
 725         $legacyevent = calendar_event::load($eventid);
 726         $legacyevent->count_repeats();
 727
 728         $eventmapper = event_container::get_event_mapper();
 729         $event = $eventmapper->from_legacy_event_to_event($legacyevent);
 730
 731         $cache = new events_related_objects_cache([$event]);
 732         $relatedobjects = [
 733             'context' => $cache->get_context($event),
 734             'course' => $cache->get_course($event),
 735         ];
 736
 737         $exporter = new event_exporter($event, $relatedobjects);
 738         $renderer = $PAGE->get_renderer('core_calendar');
 739
 740         return array('event' => $exporter->export($renderer), 'warnings' => $warnings);
 741     }
 742
 743     /**
 744      * Returns description of method result value
 745      *
 746      * @return external_description
 747      */
 748     public static function get_calendar_event_by_id_returns() {
 749         $eventstructure = event_exporter::get_read_structure();
 750
 751         return new external_single_structure(array(
 752             'event' => $eventstructure,
 753             'warnings' => new external_warnings()
 754             )
 755         );
 756     }
 757
 758     /**
 759      * Returns description of method parameters.
 760      *
 761      * @return external_function_parameters.
 762      */
 763     public static function submit_create_update_form_parameters() {
 764         return new external_function_parameters(
 765             [
 766                 'formdata' => new external_value(PARAM_RAW, 'The data from the event form'),
 767             ]
 768         );
 769     }
 770
 771     /**
 772      * Handles the event form submission.
 773      *
 774      * @param string $formdata The event form data in a URI encoded param string
 775      * @return array The created or modified event
 776      * @throws moodle_exception
 777      */
 778     public static function submit_create_update_form($formdata) {
 779         global $CFG, $USER, $PAGE;
 780         require_once($CFG->dirroot."/calendar/lib.php");
 781         require_once($CFG->libdir."/filelib.php");
 782
 783         // Parameter validation.
 784         $params = self::validate_parameters(self::submit_create_update_form_parameters(), ['formdata' => $formdata]);
 785         $context = \context_user::instance($USER->id);
 786         $data = [];
 787
 788         self::validate_context($context);
 789         parse_str($params['formdata'], $data);
 790
 791         if (!empty($data['id'])) {
 792             $eventid = clean_param($data['id'], PARAM_INT);
 793             $legacyevent = calendar_event::load($eventid);
 794             $legacyevent->count_repeats();
 795             $formoptions = ['event' => $legacyevent];
 796             $mform = new update_event_form(null, $formoptions, 'post', '', null, true, $data);
 797         } else {
 798             $legacyevent = null;
 799             $mform = new create_event_form(null, null, 'post', '', null, true, $data);
 800         }
 801
 802         if ($validateddata = $mform->get_data()) {
 803             $formmapper = new create_update_form_mapper();
 804             $properties = $formmapper->from_data_to_event_properties($validateddata);
 805
 806             if (is_null($legacyevent)) {
 807                 $legacyevent = new \calendar_event($properties);
 808                 // Need to do this in order to initialise the description
 809                 // property which then triggers the update function below
 810                 // to set the appropriate default properties on the event.
 811                 $properties = $legacyevent->properties(true);
 812             }
 813
 814             if (!calendar_edit_event_allowed($legacyevent, true)) {
 815                 print_error('nopermissiontoupdatecalendar');
 816             }
 817
 818             $legacyevent->update($properties);
 819             $eventcontext = $legacyevent->context;
 820
 821             file_remove_editor_orphaned_files($validateddata->description);
 822
 823             // Take any files added to the description draft file area and
 824             // convert them into the proper event description file area. Also
 825             // parse the description text and replace the URLs to the draft files
 826             // with the @@PLUGIN_FILE@@ placeholder to be persisted in the DB.
 827             $description = file_save_draft_area_files(
 828                 $validateddata->description['itemid'],
 829                 $eventcontext->id,
 830                 'calendar',
 831                 'event_description',
 832                 $legacyevent->id,
 833                 create_event_form::build_editor_options($eventcontext),
 834                 $validateddata->description['text']
 835             );
 836
 837             // If draft files were found then we need to save the new
 838             // description value.
 839             if ($description != $validateddata->description['text']) {
 840                 $properties->id = $legacyevent->id;
 841                 $properties->description = $description;
 842                 $legacyevent->update($properties);
 843             }
 844
 845             $eventmapper = event_container::get_event_mapper();
 846             $event = $eventmapper->from_legacy_event_to_event($legacyevent);
 847             $cache = new events_related_objects_cache([$event]);
 848             $relatedobjects = [
 849                 'context' => $cache->get_context($event),
 850                 'course' => $cache->get_course($event),
 851             ];
 852             $exporter = new event_exporter($event, $relatedobjects);
 853             $renderer = $PAGE->get_renderer('core_calendar');
 854
 855             return [ 'event' => $exporter->export($renderer) ];
 856         } else {
 857             return [ 'validationerror' => true ];
 858         }
 859     }
 860
 861     /**
 862      * Returns description of method result value.
 863      *
 864      * @return external_description.
 865      */
 866     public static function  submit_create_update_form_returns() {
 867         $eventstructure = event_exporter::get_read_structure();
 868         $eventstructure->required = VALUE_OPTIONAL;
 869
 870         return new external_single_structure(
 871             array(
 872                 'event' => $eventstructure,
 873                 'validationerror' => new external_value(PARAM_BOOL, 'Invalid form data', VALUE_DEFAULT, false),
 874             )
 875         );
 876     }
 877
 878     /**
 879      * Get data for the monthly calendar view.
 880      *
 881      * @param   int     $year The year to be shown
 882      * @param   int     $month The month to be shown
 883      * @param   int     $courseid The course to be included
 884      * @param   int     $categoryid The category to be included
 885      * @param   bool    $includenavigation Whether to include navigation
 886      * @return  array
 887      */
 888     public static function get_calendar_monthly_view($year, $month, $courseid, $categoryid, $includenavigation) {
 889         global $CFG, $DB, $USER, $PAGE;
 890         require_once($CFG->dirroot."/calendar/lib.php");
 891
 892         // Parameter validation.
 893         $params = self::validate_parameters(self::get_calendar_monthly_view_parameters(), [
 894             'year' => $year,
 895             'month' => $month,
 896             'courseid' => $courseid,
 897             'categoryid' => $categoryid,
 898             'includenavigation' => $includenavigation,
 899         ]);
 900
 901         $context = \context_user::instance($USER->id);
 902         self::validate_context($context);
 903         $PAGE->set_url('/calendar/');
 904
 905         $type = \core_calendar\type_factory::get_calendar_instance();
 906
 907         $time = $type->convert_to_timestamp($params['year'], $params['month'], 1);
 908         $calendar = \calendar_information::create($time, $params['courseid'], $params['categoryid']);
 909         self::validate_context($calendar->context);
 910
 911         list($data, $template) = calendar_get_view($calendar, 'month', $params['includenavigation']);
 912
 913         return $data;
 914     }
 915
 916     /**
 917      * Returns description of method parameters.
 918      *
 919      * @return external_function_parameters
 920      */
 921     public static function get_calendar_monthly_view_parameters() {
 922         return new external_function_parameters(
 923             [
 924                 'year' => new external_value(PARAM_INT, 'Month to be viewed', VALUE_REQUIRED),
 925                 'month' => new external_value(PARAM_INT, 'Year to be viewed', VALUE_REQUIRED),
 926                 'courseid' => new external_value(PARAM_INT, 'Course being viewed', VALUE_DEFAULT, SITEID, NULL_ALLOWED),
 927                 'categoryid' => new external_value(PARAM_INT, 'Category being viewed', VALUE_DEFAULT, null, NULL_ALLOWED),
 928                 'includenavigation' => new external_value(
 929                     PARAM_BOOL,
 930                     'Whether to show course navigation',
 931                     VALUE_DEFAULT,
 932                     true,
 933                     NULL_ALLOWED
 934                 ),
 935             ]
 936         );
 937     }
 938
 939     /**
 940      * Returns description of method result value.
 941      *
 942      * @return external_description
 943      */
 944     public static function get_calendar_monthly_view_returns() {
 945         return \core_calendar\external\month_exporter::get_read_structure();
 946     }
 947
 948     /**
 949      * Get data for the daily calendar view.
 950      *
 951      * @param   int     $year The year to be shown
 952      * @param   int     $month The month to be shown
 953      * @param   int     $day The day to be shown
 954      * @param   int     $courseid The course to be included
 955      * @return  array
 956      */
 957     public static function get_calendar_day_view($year, $month, $day, $courseid, $categoryid) {
 958         global $CFG, $DB, $USER, $PAGE;
 959         require_once($CFG->dirroot."/calendar/lib.php");
 960
 961         // Parameter validation.
 962         $params = self::validate_parameters(self::get_calendar_day_view_parameters(), [
 963             'year' => $year,
 964             'month' => $month,
 965             'day' => $day,
 966             'courseid' => $courseid,
 967             'categoryid' => $categoryid,
 968         ]);
 969
 970         $context = \context_user::instance($USER->id);
 971         self::validate_context($context);
 972
 973         $type = \core_calendar\type_factory::get_calendar_instance();
 974
 975         $time = $type->convert_to_timestamp($params['year'], $params['month'], $params['day']);
 976         $calendar = \calendar_information::create($time, $params['courseid'], $params['categoryid']);
 977         self::validate_context($calendar->context);
 978
 979         list($data, $template) = calendar_get_view($calendar, 'day', $params['includenavigation']);
 980
 981         return $data;
 982     }
 983
 984     /**
 985      * Returns description of method parameters.
 986      *
 987      * @return external_function_parameters
 988      */
 989     public static function get_calendar_day_view_parameters() {
 990         return new external_function_parameters(
 991             [
 992                 'year' => new external_value(PARAM_INT, 'Year to be viewed', VALUE_REQUIRED),
 993                 'month' => new external_value(PARAM_INT, 'Month to be viewed', VALUE_REQUIRED),
 994                 'day' => new external_value(PARAM_INT, 'Day to be viewed', VALUE_REQUIRED),
 995                 'courseid' => new external_value(PARAM_INT, 'Course being viewed', VALUE_DEFAULT, SITEID, NULL_ALLOWED),
 996                 'categoryid' => new external_value(PARAM_INT, 'Category being viewed', VALUE_DEFAULT, null, NULL_ALLOWED),
 997             ]
 998         );
 999     }
1000
1001     /**
1002      * Returns description of method result value.
1003      *
1004      * @return external_description
1005      */
1006     public static function get_calendar_day_view_returns() {
1007         return \core_calendar\external\calendar_day_exporter::get_read_structure();
1008     }
1009
1010
1011     /**
1012      * Returns description of method parameters.
1013      *
1014      * @return external_function_parameters
1015      */
1016     public static function update_event_start_day_parameters() {
1017         return new external_function_parameters(
1018             [
1019                 'eventid' => new external_value(PARAM_INT, 'Id of event to be updated', VALUE_REQUIRED),
1020                 'daytimestamp' => new external_value(PARAM_INT, 'Timestamp for the new start day', VALUE_REQUIRED),
1021             ]
1022         );
1023     }
1024
1025     /**
1026      * Change the start day for the given calendar event to the day that
1027      * corresponds with the provided timestamp.
1028      *
1029      * The timestamp only needs to be anytime within the desired day as only
1030      * the date data is extracted from it.
1031      *
1032      * The event's original time of day is maintained, only the date is shifted.
1033      *
1034      * @param int $eventid Id of event to be updated
1035      * @param int $daytimestamp Timestamp for the new start day
1036      * @return  array
1037      */
1038     public static function update_event_start_day($eventid, $daytimestamp) {
1039         global $USER, $PAGE;
1040
1041         // Parameter validation.
1042         $params = self::validate_parameters(self::update_event_start_day_parameters(), [
1043             'eventid' => $eventid,
1044             'daytimestamp' => $daytimestamp,
1045         ]);
1046
1047         $vault = event_container::get_event_vault();
1048         $mapper = event_container::get_event_mapper();
1049         $event = $vault->get_event_by_id($eventid);
1050
1051         if (!$event) {
1052             throw new \moodle_exception('Unable to find event with id ' . $eventid);
1053         }
1054
1055         $legacyevent = $mapper->from_event_to_legacy_event($event);
1056
1057         if (!calendar_edit_event_allowed($legacyevent, true)) {
1058             print_error('nopermissiontoupdatecalendar');
1059         }
1060
1061         self::validate_context($legacyevent->context);
1062
1063         $newdate = usergetdate($daytimestamp);
1064         $startdatestring = implode('-', [$newdate['year'], $newdate['mon'], $newdate['mday']]);
1065         $startdate = new DateTimeImmutable($startdatestring);
1066         $event = local_api::update_event_start_day($event, $startdate);
1067         $cache = new events_related_objects_cache([$event]);
1068         $relatedobjects = [
1069             'context' => $cache->get_context($event),
1070             'course' => $cache->get_course($event),
1071         ];
1072         $exporter = new event_exporter($event, $relatedobjects);
1073         $renderer = $PAGE->get_renderer('core_calendar');
1074
1075         return array('event' => $exporter->export($renderer));
1076     }
1077
1078     /**
1079      * Returns description of method result value.
1080      *
1081      * @return external_description
1082      */
1083     public static function update_event_start_day_returns() {
1084         return new external_single_structure(
1085             array(
1086                 'event' => event_exporter::get_read_structure()
1087             )
1088         );
1089     }
1090
1091     /**
1092      * Get data for the monthly calendar view.
1093      *
1094      * @param   int     $courseid The course to be included
1095      * @param   int     $categoryid The category to be included
1096      * @return  array
1097      */
1098     public static function get_calendar_upcoming_view($courseid, $categoryid) {
1099         global $CFG, $DB, $USER, $PAGE;
1100         require_once($CFG->dirroot."/calendar/lib.php");
1101
1102         // Parameter validation.
1103         $params = self::validate_parameters(self::get_calendar_upcoming_view_parameters(), [
1104             'courseid' => $courseid,
1105             'categoryid' => $categoryid,
1106         ]);
1107
1108         $context = \context_user::instance($USER->id);
1109         self::validate_context($context);
1110         $PAGE->set_url('/calendar/');
1111
1112         $calendar = \calendar_information::create(time(), $params['courseid'], $params['categoryid']);
1113         self::validate_context($calendar->context);
1114
1115         list($data, $template) = calendar_get_view($calendar, 'upcoming');
1116
1117         return $data;
1118     }
1119
1120     /**
1121      * Returns description of method parameters.
1122      *
1123      * @return external_function_parameters
1124      */
1125     public static function get_calendar_upcoming_view_parameters() {
1126         return new external_function_parameters(
1127             [
1128                 'courseid' => new external_value(PARAM_INT, 'Course being viewed', VALUE_DEFAULT, SITEID, NULL_ALLOWED),
1129                 'categoryid' => new external_value(PARAM_INT, 'Category being viewed', VALUE_DEFAULT, null, NULL_ALLOWED),
1130             ]
1131         );
1132     }
1133
1134     /**
1135      * Returns description of method result value.
1136      *
1137      * @return external_description
1138      */
1139     public static function get_calendar_upcoming_view_returns() {
1140         return \core_calendar\external\calendar_upcoming_exporter::get_read_structure();
1141     }
1142 }