/**
* Return all the question types used in this quiz.
*
* @param boolean $includepotential if the quiz include random questions, setting this flag to true will make the function to
* return all the possible question types in the random questions category
* @return array a sorted array including the different question types
* @since Moodle 3.1
*/
public function get_all_question_types_used($includepotential = false)
{
$questiontypes = array();
// To control if we need to look in categories for questions.
$qcategories = array();
// We must be careful with random questions, if we find a random question we must assume that the quiz may content
// any of the questions in the referenced category (or subcategories).
foreach ($this->get_questions() as $questiondata) {
if ($questiondata->qtype == 'random' and $includepotential) {
$includesubcategories = (bool) $questiondata->questiontext;
if (!isset($qcategories[$questiondata->category])) {
$qcategories[$questiondata->category] = false;
}
if ($includesubcategories) {
$qcategories[$questiondata->category] = true;
}
} else {
if (!in_array($questiondata->qtype, $questiontypes)) {
$questiontypes[] = $questiondata->qtype;
}
}
}
if (!empty($qcategories)) {
// We have to look for all the question types in these categories.
$categoriestolook = array();
foreach ($qcategories as $cat => $includesubcats) {
if ($includesubcats) {
$categoriestolook = array_merge($categoriestolook, question_categorylist($cat));
} else {
$categoriestolook[] = $cat;
}
}
$questiontypesincategories = question_bank::get_all_question_types_in_categories($categoriestolook);
$questiontypes = array_merge($questiontypes, $questiontypesincategories);
}
$questiontypes = array_unique($questiontypes);
sort($questiontypes);
return $questiontypes;
}
