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/**
* Course selector field.
*
* Allows auto-complete ajax searching for courses and can restrict by enrolment, permissions, viewhidden...
*
* @package core_form
* @copyright 2015 Damyon Wiese
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
global $CFG;
require_once($CFG->libdir . '/form/autocomplete.php');
/**
* Form field type for choosing a course.
*
* Allows auto-complete ajax searching for courses and can restrict by enrolment, permissions, viewhidden...
*
* @package core_form
* @copyright 2015 Damyon Wiese
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class MoodleQuickForm_course extends MoodleQuickForm_autocomplete {
/**
* @var array $exclude Exclude a list of courses from the list (e.g. the current course).
*/
protected $exclude = array();
/**
* @var boolean $allowmultiple Allow selecting more than one course.
*/
protected $multiple = false;
/**
* @var array $requiredcapabilities Array of extra capabilities to check at the course context.
*/
protected $requiredcapabilities = array();
/**
* @var bool $limittoenrolled Only allow enrolled courses.
*/
protected $limittoenrolled = false;
/**
* Constructor
*
* @param string $elementname Element name
* @param mixed $elementlabel Label(s) for an element
* @param mixed $attributes Array of typical HTML attributes plus additional options, such as:
* 'multiple' - boolean multi select
* 'exclude' - array or int, list of course ids to never show
* 'requiredcapabilities' - array of capabilities. Uses ANY to combine them.
* 'limittoenrolled' - boolean Limits to enrolled courses.
* 'includefrontpage' - boolean Enables the frontpage to be selected.
* 'onlywithcompletion' - boolean Limits to courses where completion is enabled.
*/
public function __construct($elementname = null, $elementlabel = null, $attributes = array()) {
if (!is_array($attributes)) {
$attributes = [];
}
if (isset($attributes['multiple'])) {
$this->multiple = $attributes['multiple'];
}
if (isset($attributes['exclude'])) {
$this->exclude = $attributes['exclude'];
if (!is_array($this->exclude)) {
$this->exclude = array($this->exclude);
}
unset($attributes['exclude']);
}
if (isset($attributes['requiredcapabilities'])) {
$this->requiredcapabilities = $attributes['requiredcapabilities'];
unset($attributes['requiredcapabilities']);
}
if (isset($attributes['limittoenrolled'])) {
$this->limittoenrolled = $attributes['limittoenrolled'];
unset($attributes['limittoenrolled']);
}
$attributes += array(
'ajax' => 'core/form-course-selector',
'data-requiredcapabilities' => implode(',', $this->requiredcapabilities),
'data-exclude' => implode(',', $this->exclude),
'data-limittoenrolled' => (int)$this->limittoenrolled
);
if (!empty($attributes['includefrontpage'])) {
$attributes['data-includefrontpage'] = SITEID;
unset($attributes['includefrontpage']);
}
if (!empty($attributes['onlywithcompletion'])) {
$attributes['data-onlywithcompletion'] = 1;
unset($attributes['onlywithcompletion']);
}
parent::__construct($elementname, $elementlabel, array(), $attributes);
}
/**
* Set the value of this element. If values can be added or are unknown, we will
* make sure they exist in the options array.
* @param string|array $value The value to set.
* @return boolean
*/
public function setValue($value) {
global $DB;
$values = (array) $value;
$coursestofetch = array();
foreach ($values as $onevalue) {
if ($onevalue && !$this->optionExists($onevalue) &&
($onevalue !== '_qf__force_multiselect_submission')) {
array_push($coursestofetch, $onevalue);
}
}
if (empty($coursestofetch)) {
return $this->setSelected($values);
}
// There is no API function to load a list of course from a list of ids.
$ctxselect = context_helper::get_preload_record_columns_sql('ctx');
$fields = array('c.id', 'c.category', 'c.sortorder',
'c.shortname', 'c.fullname', 'c.idnumber',
'c.startdate', 'c.visible', 'c.cacherev');
list($whereclause, $params) = $DB->get_in_or_equal($coursestofetch, SQL_PARAMS_NAMED, 'id');
$sql = "SELECT ". join(',', $fields). ", $ctxselect
FROM {course} c
JOIN {context} ctx ON c.id = ctx.instanceid AND ctx.contextlevel = :contextcourse
WHERE c.id ". $whereclause." ORDER BY c.sortorder";
$list = $DB->get_records_sql($sql, array('contextcourse' => CONTEXT_COURSE) + $params);
$mycourses = enrol_get_my_courses(null, null, 0, array_keys($list));
$coursestoselect = array();
foreach ($list as $course) {
context_helper::preload_from_record($course);
$context = context_course::instance($course->id);
// Make sure we can see the course.
if (!array_key_exists($course->id, $mycourses) && !core_course_category::can_view_course_info($course)) {
continue;
}
$label = format_string(get_course_display_name_for_list($course), true, ['context' => $context]);
$this->addOption($label, $course->id);
array_push($coursestoselect, $course->id);
}
return $this->setSelected($values);
}
}