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Differences Between: [Versions 310 and 401] [Versions 311 and 401] [Versions 39 and 401] [Versions 400 and 401] [Versions 401 and 402] [Versions 401 and 403]

   1  <?php
   2  
   3  defined('MOODLE_INTERNAL') || die;
   4  
   5  require_once($CFG->libdir.'/formslib.php');
   6  require_once($CFG->libdir.'/completionlib.php');
   7  
   8  /**
   9   * The form for handling editing a course.
  10   */
  11  class course_edit_form extends moodleform {
  12      protected $course;
  13      protected $context;
  14  
  15      /**
  16       * Form definition.
  17       */
  18      function definition() {
  19          global $CFG, $PAGE;
  20  
  21          $mform    = $this->_form;
  22          $PAGE->requires->js_call_amd('core_course/formatchooser', 'init');
  23  
  24          $course        = $this->_customdata['course']; // this contains the data of this form
  25          $category      = $this->_customdata['category'];
  26          $editoroptions = $this->_customdata['editoroptions'];
  27          $returnto = $this->_customdata['returnto'];
  28          $returnurl = $this->_customdata['returnurl'];
  29  
  30          $systemcontext   = context_system::instance();
  31          $categorycontext = context_coursecat::instance($category->id);
  32  
  33          if (!empty($course->id)) {
  34              $coursecontext = context_course::instance($course->id);
  35              $context = $coursecontext;
  36          } else {
  37              $coursecontext = null;
  38              $context = $categorycontext;
  39          }
  40  
  41          $courseconfig = get_config('moodlecourse');
  42  
  43          $this->course  = $course;
  44          $this->context = $context;
  45  
  46          // Form definition with new course defaults.
  47          $mform->addElement('header','general', get_string('general', 'form'));
  48  
  49          $mform->addElement('hidden', 'returnto', null);
  50          $mform->setType('returnto', PARAM_ALPHANUM);
  51          $mform->setConstant('returnto', $returnto);
  52  
  53          $mform->addElement('hidden', 'returnurl', null);
  54          $mform->setType('returnurl', PARAM_LOCALURL);
  55          $mform->setConstant('returnurl', $returnurl);
  56  
  57          $mform->addElement('text','fullname', get_string('fullnamecourse'),'maxlength="254" size="50"');
  58          $mform->addHelpButton('fullname', 'fullnamecourse');
  59          $mform->addRule('fullname', get_string('missingfullname'), 'required', null, 'client');
  60          $mform->setType('fullname', PARAM_TEXT);
  61          if (!empty($course->id) and !has_capability('moodle/course:changefullname', $coursecontext)) {
  62              $mform->hardFreeze('fullname');
  63              $mform->setConstant('fullname', $course->fullname);
  64          }
  65  
  66          $mform->addElement('text', 'shortname', get_string('shortnamecourse'), 'maxlength="100" size="20"');
  67          $mform->addHelpButton('shortname', 'shortnamecourse');
  68          $mform->addRule('shortname', get_string('missingshortname'), 'required', null, 'client');
  69          $mform->setType('shortname', PARAM_TEXT);
  70          if (!empty($course->id) and !has_capability('moodle/course:changeshortname', $coursecontext)) {
  71              $mform->hardFreeze('shortname');
  72              $mform->setConstant('shortname', $course->shortname);
  73          }
  74  
  75          // Verify permissions to change course category or keep current.
  76          if (empty($course->id)) {
  77              if (has_capability('moodle/course:create', $categorycontext)) {
  78                  $displaylist = core_course_category::make_categories_list('moodle/course:create');
  79                  $mform->addElement('autocomplete', 'category', get_string('coursecategory'), $displaylist);
  80                  $mform->addRule('category', null, 'required', null, 'client');
  81                  $mform->addHelpButton('category', 'coursecategory');
  82                  $mform->setDefault('category', $category->id);
  83              } else {
  84                  $mform->addElement('hidden', 'category', null);
  85                  $mform->setType('category', PARAM_INT);
  86                  $mform->setConstant('category', $category->id);
  87              }
  88          } else {
  89              if (has_capability('moodle/course:changecategory', $coursecontext)) {
  90                  $displaylist = core_course_category::make_categories_list('moodle/course:changecategory');
  91                  if (!isset($displaylist[$course->category])) {
  92                      //always keep current
  93                      $displaylist[$course->category] = core_course_category::get($course->category, MUST_EXIST, true)
  94                          ->get_formatted_name();
  95                  }
  96                  $mform->addElement('autocomplete', 'category', get_string('coursecategory'), $displaylist);
  97                  $mform->addRule('category', null, 'required', null, 'client');
  98                  $mform->addHelpButton('category', 'coursecategory');
  99              } else {
 100                  //keep current
 101                  $mform->addElement('hidden', 'category', null);
 102                  $mform->setType('category', PARAM_INT);
 103                  $mform->setConstant('category', $course->category);
 104              }
 105          }
 106  
 107          $choices = array();
 108          $choices['0'] = get_string('hide');
 109          $choices['1'] = get_string('show');
 110          $mform->addElement('select', 'visible', get_string('coursevisibility'), $choices);
 111          $mform->addHelpButton('visible', 'coursevisibility');
 112          $mform->setDefault('visible', $courseconfig->visible);
 113          if (!empty($course->id)) {
 114              if (!has_capability('moodle/course:visibility', $coursecontext)) {
 115                  $mform->hardFreeze('visible');
 116                  $mform->setConstant('visible', $course->visible);
 117              }
 118          } else {
 119              if (!guess_if_creator_will_have_course_capability('moodle/course:visibility', $categorycontext)) {
 120                  $mform->hardFreeze('visible');
 121                  $mform->setConstant('visible', $courseconfig->visible);
 122              }
 123          }
 124  
 125          // Download course content.
 126          if ($CFG->downloadcoursecontentallowed) {
 127              $downloadchoices = [
 128                  DOWNLOAD_COURSE_CONTENT_DISABLED => get_string('no'),
 129                  DOWNLOAD_COURSE_CONTENT_ENABLED => get_string('yes'),
 130              ];
 131              $sitedefaultstring = $downloadchoices[$courseconfig->downloadcontentsitedefault];
 132              $downloadchoices[DOWNLOAD_COURSE_CONTENT_SITE_DEFAULT] = get_string('sitedefaultspecified', '', $sitedefaultstring);
 133              $downloadselectdefault = $courseconfig->downloadcontent ?? DOWNLOAD_COURSE_CONTENT_SITE_DEFAULT;
 134  
 135              $mform->addElement('select', 'downloadcontent', get_string('enabledownloadcoursecontent', 'course'), $downloadchoices);
 136              $mform->addHelpButton('downloadcontent', 'downloadcoursecontent', 'course');
 137              $mform->setDefault('downloadcontent', $downloadselectdefault);
 138  
 139              if ((!empty($course->id) && !has_capability('moodle/course:configuredownloadcontent', $coursecontext)) ||
 140                      (empty($course->id) &&
 141                      !guess_if_creator_will_have_course_capability('moodle/course:configuredownloadcontent', $categorycontext))) {
 142                  $mform->hardFreeze('downloadcontent');
 143                  $mform->setConstant('downloadcontent', $downloadselectdefault);
 144              }
 145          }
 146  
 147          $mform->addElement('date_time_selector', 'startdate', get_string('startdate'));
 148          $mform->addHelpButton('startdate', 'startdate');
 149          $date = (new DateTime())->setTimestamp(usergetmidnight(time()));
 150          $date->modify('+1 day');
 151          $mform->setDefault('startdate', $date->getTimestamp());
 152  
 153          $mform->addElement('date_time_selector', 'enddate', get_string('enddate'), array('optional' => true));
 154          $mform->addHelpButton('enddate', 'enddate');
 155  
 156          if (!empty($CFG->enablecourserelativedates)) {
 157              $attributes = [
 158                  'aria-describedby' => 'relativedatesmode_warning'
 159              ];
 160              if (!empty($course->id)) {
 161                  $attributes['disabled'] = true;
 162              }
 163              $relativeoptions = [
 164                  0 => get_string('no'),
 165                  1 => get_string('yes'),
 166              ];
 167              $relativedatesmodegroup = [];
 168              $relativedatesmodegroup[] = $mform->createElement('select', 'relativedatesmode', get_string('relativedatesmode'),
 169                  $relativeoptions, $attributes);
 170              $relativedatesmodegroup[] = $mform->createElement('html', html_writer::span(get_string('relativedatesmode_warning'),
 171                  '', ['id' => 'relativedatesmode_warning']));
 172              $mform->addGroup($relativedatesmodegroup, 'relativedatesmodegroup', get_string('relativedatesmode'), null, false);
 173              $mform->addHelpButton('relativedatesmodegroup', 'relativedatesmode');
 174          }
 175  
 176          $mform->addElement('text','idnumber', get_string('idnumbercourse'),'maxlength="100"  size="10"');
 177          $mform->addHelpButton('idnumber', 'idnumbercourse');
 178          $mform->setType('idnumber', PARAM_RAW);
 179          if (!empty($course->id) and !has_capability('moodle/course:changeidnumber', $coursecontext)) {
 180              $mform->hardFreeze('idnumber');
 181              $mform->setConstants('idnumber', $course->idnumber);
 182          }
 183  
 184          // Description.
 185          $mform->addElement('header', 'descriptionhdr', get_string('description'));
 186          $mform->setExpanded('descriptionhdr');
 187  
 188          $mform->addElement('editor','summary_editor', get_string('coursesummary'), null, $editoroptions);
 189          $mform->addHelpButton('summary_editor', 'coursesummary');
 190          $mform->setType('summary_editor', PARAM_RAW);
 191          $summaryfields = 'summary_editor';
 192  
 193          if ($overviewfilesoptions = course_overviewfiles_options($course)) {
 194              $mform->addElement('filemanager', 'overviewfiles_filemanager', get_string('courseoverviewfiles'), null, $overviewfilesoptions);
 195              $mform->addHelpButton('overviewfiles_filemanager', 'courseoverviewfiles');
 196              $summaryfields .= ',overviewfiles_filemanager';
 197          }
 198  
 199          if (!empty($course->id) and !has_capability('moodle/course:changesummary', $coursecontext)) {
 200              // Remove the description header it does not contain anything any more.
 201              $mform->removeElement('descriptionhdr');
 202              $mform->hardFreeze($summaryfields);
 203          }
 204  
 205          // Course format.
 206          $mform->addElement('header', 'courseformathdr', get_string('type_format', 'plugin'));
 207  
 208          $courseformats = get_sorted_course_formats(true);
 209          $formcourseformats = array();
 210          foreach ($courseformats as $courseformat) {
 211              $formcourseformats[$courseformat] = get_string('pluginname', "format_$courseformat");
 212          }
 213          if (isset($course->format)) {
 214              $course->format = course_get_format($course)->get_format(); // replace with default if not found
 215              if (!in_array($course->format, $courseformats)) {
 216                  // this format is disabled. Still display it in the dropdown
 217                  $formcourseformats[$course->format] = get_string('withdisablednote', 'moodle',
 218                          get_string('pluginname', 'format_'.$course->format));
 219              }
 220          }
 221  
 222          $mform->addElement('select', 'format', get_string('format'), $formcourseformats, [
 223              'data-formatchooser-field' => 'selector',
 224          ]);
 225          $mform->addHelpButton('format', 'format');
 226          $mform->setDefault('format', $courseconfig->format);
 227  
 228          // Button to update format-specific options on format change (will be hidden by JavaScript).
 229          $mform->registerNoSubmitButton('updatecourseformat');
 230          $mform->addElement('submit', 'updatecourseformat', get_string('courseformatudpate'), [
 231              'data-formatchooser-field' => 'updateButton',
 232              'class' => 'd-none',
 233          ]);
 234  
 235          // Just a placeholder for the course format options.
 236          $mform->addElement('hidden', 'addcourseformatoptionshere');
 237          $mform->setType('addcourseformatoptionshere', PARAM_BOOL);
 238  
 239          // Appearance.
 240          $mform->addElement('header', 'appearancehdr', get_string('appearance'));
 241  
 242          if (!empty($CFG->allowcoursethemes)) {
 243              $themeobjects = get_list_of_themes();
 244              $themes=array();
 245              $themes[''] = get_string('forceno');
 246              foreach ($themeobjects as $key=>$theme) {
 247                  if (empty($theme->hidefromselector)) {
 248                      $themes[$key] = get_string('pluginname', 'theme_'.$theme->name);
 249                  }
 250              }
 251              $mform->addElement('select', 'theme', get_string('forcetheme'), $themes);
 252          }
 253  
 254          if ((empty($course->id) && guess_if_creator_will_have_course_capability('moodle/course:setforcedlanguage', $categorycontext))
 255                  || (!empty($course->id) && has_capability('moodle/course:setforcedlanguage', $coursecontext))) {
 256  
 257              $languages = ['' => get_string('forceno')];
 258              $languages += get_string_manager()->get_list_of_translations();
 259  
 260              $mform->addElement('select', 'lang', get_string('forcelanguage'), $languages);
 261              $mform->setDefault('lang', $courseconfig->lang);
 262          }
 263  
 264          // Multi-Calendar Support - see MDL-18375.
 265          $calendartypes = \core_calendar\type_factory::get_list_of_calendar_types();
 266          // We do not want to show this option unless there is more than one calendar type to display.
 267          if (count($calendartypes) > 1) {
 268              $calendars = array();
 269              $calendars[''] = get_string('forceno');
 270              $calendars += $calendartypes;
 271              $mform->addElement('select', 'calendartype', get_string('forcecalendartype', 'calendar'), $calendars);
 272          }
 273  
 274          $options = range(0, 10);
 275          $mform->addElement('select', 'newsitems', get_string('newsitemsnumber'), $options);
 276          $courseconfig = get_config('moodlecourse');
 277          $mform->setDefault('newsitems', $courseconfig->newsitems);
 278          $mform->addHelpButton('newsitems', 'newsitemsnumber');
 279  
 280          $mform->addElement('selectyesno', 'showgrades', get_string('showgrades'));
 281          $mform->addHelpButton('showgrades', 'showgrades');
 282          $mform->setDefault('showgrades', $courseconfig->showgrades);
 283  
 284          $mform->addElement('selectyesno', 'showreports', get_string('showreports'));
 285          $mform->addHelpButton('showreports', 'showreports');
 286          $mform->setDefault('showreports', $courseconfig->showreports);
 287  
 288          // Show activity dates.
 289          $mform->addElement('selectyesno', 'showactivitydates', get_string('showactivitydates'));
 290          $mform->addHelpButton('showactivitydates', 'showactivitydates');
 291          $mform->setDefault('showactivitydates', $courseconfig->showactivitydates);
 292  
 293          // Files and uploads.
 294          $mform->addElement('header', 'filehdr', get_string('filesanduploads'));
 295  
 296          if (!empty($course->legacyfiles) or !empty($CFG->legacyfilesinnewcourses)) {
 297              if (empty($course->legacyfiles)) {
 298                  //0 or missing means no legacy files ever used in this course - new course or nobody turned on legacy files yet
 299                  $choices = array('0'=>get_string('no'), '2'=>get_string('yes'));
 300              } else {
 301                  $choices = array('1'=>get_string('no'), '2'=>get_string('yes'));
 302              }
 303              $mform->addElement('select', 'legacyfiles', get_string('courselegacyfiles'), $choices);
 304              $mform->addHelpButton('legacyfiles', 'courselegacyfiles');
 305              if (!isset($courseconfig->legacyfiles)) {
 306                  // in case this was not initialised properly due to switching of $CFG->legacyfilesinnewcourses
 307                  $courseconfig->legacyfiles = 0;
 308              }
 309              $mform->setDefault('legacyfiles', $courseconfig->legacyfiles);
 310          }
 311  
 312          // Handle non-existing $course->maxbytes on course creation.
 313          $coursemaxbytes = !isset($course->maxbytes) ? null : $course->maxbytes;
 314  
 315          // Let's prepare the maxbytes popup.
 316          $choices = get_max_upload_sizes($CFG->maxbytes, 0, 0, $coursemaxbytes);
 317          $mform->addElement('select', 'maxbytes', get_string('maximumupload'), $choices);
 318          $mform->addHelpButton('maxbytes', 'maximumupload');
 319          $mform->setDefault('maxbytes', $courseconfig->maxbytes);
 320  
 321          // Completion tracking.
 322          if (completion_info::is_enabled_for_site()) {
 323              $mform->addElement('header', 'completionhdr', get_string('completion', 'completion'));
 324              $mform->addElement('selectyesno', 'enablecompletion', get_string('enablecompletion', 'completion'));
 325              $mform->setDefault('enablecompletion', $courseconfig->enablecompletion);
 326              $mform->addHelpButton('enablecompletion', 'enablecompletion', 'completion');
 327  
 328              $showcompletionconditions = $courseconfig->showcompletionconditions ?? COMPLETION_SHOW_CONDITIONS;
 329              $mform->addElement('selectyesno', 'showcompletionconditions', get_string('showcompletionconditions', 'completion'));
 330              $mform->addHelpButton('showcompletionconditions', 'showcompletionconditions', 'completion');
 331              $mform->setDefault('showcompletionconditions', $showcompletionconditions);
 332              $mform->hideIf('showcompletionconditions', 'enablecompletion', 'eq', COMPLETION_DISABLED);
 333          } else {
 334              $mform->addElement('hidden', 'enablecompletion');
 335              $mform->setType('enablecompletion', PARAM_INT);
 336              $mform->setDefault('enablecompletion', 0);
 337          }
 338  
 339          enrol_course_edit_form($mform, $course, $context);
 340  
 341          $mform->addElement('header','groups', get_string('groupsettingsheader', 'group'));
 342  
 343          $choices = array();
 344          $choices[NOGROUPS] = get_string('groupsnone', 'group');
 345          $choices[SEPARATEGROUPS] = get_string('groupsseparate', 'group');
 346          $choices[VISIBLEGROUPS] = get_string('groupsvisible', 'group');
 347          $mform->addElement('select', 'groupmode', get_string('groupmode', 'group'), $choices);
 348          $mform->addHelpButton('groupmode', 'groupmode', 'group');
 349          $mform->setDefault('groupmode', $courseconfig->groupmode);
 350  
 351          $mform->addElement('selectyesno', 'groupmodeforce', get_string('groupmodeforce', 'group'));
 352          $mform->addHelpButton('groupmodeforce', 'groupmodeforce', 'group');
 353          $mform->setDefault('groupmodeforce', $courseconfig->groupmodeforce);
 354  
 355          //default groupings selector
 356          $options = array();
 357          $options[0] = get_string('none');
 358          $mform->addElement('select', 'defaultgroupingid', get_string('defaultgrouping', 'group'), $options);
 359  
 360          if ((empty($course->id) && guess_if_creator_will_have_course_capability('moodle/course:renameroles', $categorycontext))
 361                  || (!empty($course->id) && has_capability('moodle/course:renameroles', $coursecontext))) {
 362              // Customizable role names in this course.
 363              $mform->addElement('header', 'rolerenaming', get_string('rolerenaming'));
 364              $mform->addHelpButton('rolerenaming', 'rolerenaming');
 365  
 366              if ($roles = get_all_roles()) {
 367                  $roles = role_fix_names($roles, null, ROLENAME_ORIGINAL);
 368                  $assignableroles = get_roles_for_contextlevels(CONTEXT_COURSE);
 369                  foreach ($roles as $role) {
 370                      $mform->addElement('text', 'role_' . $role->id, get_string('yourwordforx', '', $role->localname));
 371                      $mform->setType('role_' . $role->id, PARAM_TEXT);
 372                  }
 373              }
 374          }
 375  
 376          if (core_tag_tag::is_enabled('core', 'course') &&
 377                  ((empty($course->id) && guess_if_creator_will_have_course_capability('moodle/course:tag', $categorycontext))
 378                  || (!empty($course->id) && has_capability('moodle/course:tag', $coursecontext)))) {
 379              $mform->addElement('header', 'tagshdr', get_string('tags', 'tag'));
 380              $mform->addElement('tags', 'tags', get_string('tags'),
 381                      array('itemtype' => 'course', 'component' => 'core'));
 382          }
 383  
 384          // Add custom fields to the form.
 385          $handler = core_course\customfield\course_handler::create();
 386          $handler->set_parent_context($categorycontext); // For course handler only.
 387          $handler->instance_form_definition($mform, empty($course->id) ? 0 : $course->id);
 388  
 389          // When two elements we need a group.
 390          $buttonarray = array();
 391          $classarray = array('class' => 'form-submit');
 392          if ($returnto !== 0) {
 393              $buttonarray[] = &$mform->createElement('submit', 'saveandreturn', get_string('savechangesandreturn'), $classarray);
 394          }
 395          $buttonarray[] = &$mform->createElement('submit', 'saveanddisplay', get_string('savechangesanddisplay'), $classarray);
 396          $buttonarray[] = &$mform->createElement('cancel');
 397          $mform->addGroup($buttonarray, 'buttonar', '', array(' '), false);
 398          $mform->closeHeaderBefore('buttonar');
 399  
 400          $mform->addElement('hidden', 'id', null);
 401          $mform->setType('id', PARAM_INT);
 402  
 403          // Prepare custom fields data.
 404          $handler->instance_form_before_set_data($course);
 405          // Finally set the current form data
 406          $this->set_data($course);
 407      }
 408  
 409      /**
 410       * Fill in the current page data for this course.
 411       */
 412      function definition_after_data() {
 413          global $DB;
 414  
 415          $mform = $this->_form;
 416  
 417          // add available groupings
 418          $courseid = $mform->getElementValue('id');
 419          if ($courseid and $mform->elementExists('defaultgroupingid')) {
 420              $options = array();
 421              if ($groupings = $DB->get_records('groupings', array('courseid'=>$courseid))) {
 422                  foreach ($groupings as $grouping) {
 423                      $options[$grouping->id] = format_string($grouping->name);
 424                  }
 425              }
 426              core_collator::asort($options);
 427              $gr_el =& $mform->getElement('defaultgroupingid');
 428              $gr_el->load($options);
 429          }
 430  
 431          // add course format options
 432          $formatvalue = $mform->getElementValue('format');
 433          if (is_array($formatvalue) && !empty($formatvalue)) {
 434  
 435              $params = array('format' => $formatvalue[0]);
 436              // Load the course as well if it is available, course formats may need it to work out
 437              // they preferred course end date.
 438              if ($courseid) {
 439                  $params['id'] = $courseid;
 440              }
 441              $courseformat = course_get_format((object)$params);
 442  
 443              $elements = $courseformat->create_edit_form_elements($mform);
 444              for ($i = 0; $i < count($elements); $i++) {
 445                  $mform->insertElementBefore($mform->removeElement($elements[$i]->getName(), false),
 446                          'addcourseformatoptionshere');
 447              }
 448  
 449              // Remove newsitems element if format does not support news.
 450              if (!$courseformat->supports_news()) {
 451                  $mform->removeElement('newsitems');
 452              }
 453          }
 454  
 455          // Tweak the form with values provided by custom fields in use.
 456          $handler  = core_course\customfield\course_handler::create();
 457          $handler->instance_form_definition_after_data($mform, empty($courseid) ? 0 : $courseid);
 458      }
 459  
 460      /**
 461       * Validation.
 462       *
 463       * @param array $data
 464       * @param array $files
 465       * @return array the errors that were found
 466       */
 467      function validation($data, $files) {
 468          global $DB;
 469  
 470          $errors = parent::validation($data, $files);
 471  
 472          // Add field validation check for duplicate shortname.
 473          if ($course = $DB->get_record('course', array('shortname' => $data['shortname']), '*', IGNORE_MULTIPLE)) {
 474              if (empty($data['id']) || $course->id != $data['id']) {
 475                  $errors['shortname'] = get_string('shortnametaken', '', $course->fullname);
 476              }
 477          }
 478  
 479          // Add field validation check for duplicate idnumber.
 480          if (!empty($data['idnumber']) && (empty($data['id']) || $this->course->idnumber != $data['idnumber'])) {
 481              if ($course = $DB->get_record('course', array('idnumber' => $data['idnumber']), '*', IGNORE_MULTIPLE)) {
 482                  if (empty($data['id']) || $course->id != $data['id']) {
 483                      $errors['idnumber'] = get_string('courseidnumbertaken', 'error', $course->fullname);
 484                  }
 485              }
 486          }
 487  
 488          if ($errorcode = course_validate_dates($data)) {
 489              $errors['enddate'] = get_string($errorcode, 'error');
 490          }
 491  
 492          $errors = array_merge($errors, enrol_course_edit_validation($data, $this->context));
 493  
 494          $courseformat = course_get_format((object)array('format' => $data['format']));
 495          $formaterrors = $courseformat->edit_form_validation($data, $files, $errors);
 496          if (!empty($formaterrors) && is_array($formaterrors)) {
 497              $errors = array_merge($errors, $formaterrors);
 498          }
 499  
 500          // Add the custom fields validation.
 501          $handler = core_course\customfield\course_handler::create();
 502          $errors  = array_merge($errors, $handler->instance_form_validation($data, $files));
 503  
 504          return $errors;
 505      }
 506  }