/**
* Perform the necessary preprocessing for the fields added by
* {@link add_per_answer_fields()}.
* @param object $question the data being passed to the form.
* @return object $question the modified data.
*/
protected function data_preprocessing_answers($question, $withanswerfiles = false)
{
if (empty($question->options->answers)) {
return $question;
}
$key = 0;
foreach ($question->options->answers as $answer) {
// answer content & format
$question->answer[$key] = json_encode(qtype_omerocommon::serialize_to_json_from($answer->answer));
$question->answerformat[$key] = $answer->answerformat;
// answer fraction
$question->fraction[$key] = 0 + $answer->fraction;
unset($this->_form->_defaultValues["fraction[{$key}]"]);
// answer feedback
$question->feedback[$key] = json_encode(qtype_omerocommon::serialize_to_json_from($answer->feedback));
$question->feedbackformat[$key] = $answer->feedbackformat;
$question->feedbackimages[$key] = empty($answer->images) ? json_encode(array()) : $answer->images;
$question->answer_locale_map[$key] = json_encode(qtype_omerocommon::serialize_to_json_from($answer->answer));
$question->feedback_locale_map[$key] = json_encode(qtype_omerocommon::serialize_to_json_from($answer->feedback));
$key++;
}
// Now process extra answer fields.
$extraanswerfields = question_bank::get_qtype($question->qtype)->extra_answer_fields();
if (is_array($extraanswerfields)) {
// Omit table name.
array_shift($extraanswerfields);
$question = $this->data_preprocessing_extra_answer_fields($question, $extraanswerfields);
}
return $question;
}
public function save_question_options($question)
{
global $DB;
$context = $question->context;
$result = new stdClass();
$oldanswers = $DB->get_records('question_answers', array('question' => $question->id), 'id ASC');
// Following hack to check at least two answers exist.
$answercount = 0;
foreach ($question->answer_locale_map as $key => $answer) {
if ($answer != '') {
$answercount++;
}
}
if ($answercount < 1) {
// Check there are at lest 2 answers for multiple choice.
$result->notice = get_string('notenoughanswers', 'qtype_multichoice', '1');
return $result;
}
// Insert all the new answers.
$totalfraction = 0;
$maxfraction = -1;
foreach ($question->answer_locale_map as $key => $answertext) {
if (trim($answertext) == '') {
continue;
}
// Update an existing answer if possible.
$answer = array_shift($oldanswers);
if (!$answer) {
$answer = new stdClass();
$answer->question = $question->id;
$answer->answer = '';
$answer->answerformat = '';
$answer->feedback = '';
$answer->fraction = 0;
$answer->id = $DB->insert_record('question_answers', $answer);
}
$answer->answer = qtype_omerocommon::serialize_to_multilang_form($question->answer_locale_map[$key]);
$answer->feedback = qtype_omerocommon::serialize_to_multilang_form($question->feedback_locale_map[$key]);
if (isset($question->fraction[$key])) {
$answer->fraction = $question->fraction[$key];
}
$DB->update_record('question_answers', $answer);
if ($question->fraction[$key] > 0) {
$totalfraction += $question->fraction[$key];
}
if ($question->fraction[$key] > $maxfraction) {
$maxfraction = $question->fraction[$key];
}
// NOTICE: our implementation supports at most one 'answer-option' per answer
$answer_option = $DB->get_record('question_answers_omemopt', array('answerid' => $answer->id));
if (!$answer_option) {
$answer_option = new stdClass();
$answer_option->answerid = $answer->id;
$answer_option->images = $question->feedbackimages[$key];
$answer_option->id = $DB->insert_record("question_answers_omemopt", $answer_option);
} else {
$answer_option->images = $question->feedbackimages[$key];
$DB->update_record("question_answers_omemopt", $answer_option);
}
}
// Delete any left over old answer records.
$fs = get_file_storage();
foreach ($oldanswers as $oldanswer) {
$fs->delete_area_files($context->id, 'question', 'answerfeedback', $oldanswer->id);
$DB->delete_records('question_answers', array('id' => $oldanswer->id));
}
$options = $DB->get_record($this->get_table_name(), array('questionid' => $question->id));
if (!$options) {
$options = new stdClass();
$options->questionid = $question->id;
$options->omeroimageurl = '';
$options->correctfeedback = '';
$options->partiallycorrectfeedback = '';
$options->incorrectfeedback = '';
$options->visiblerois = '';
$options->focusablerois = '';
$options->omeroimagelocked = 0;
$options->omeroimageproperties = "";
$options->id = $DB->insert_record($this->get_table_name(), $options);
}
$options->single = $question->single;
if (isset($question->layout)) {
$options->layout = $question->layout;
}
$options->omeroimageurl = $question->omeroimageurl;
$options->omeroimagelocked = $question->omeroimagelocked;
$options->omeroimageproperties = $question->omeroimageproperties;
$options->answernumbering = $question->answernumbering;
$options->shuffleanswers = $question->shuffleanswers;
$options->visiblerois = $question->visiblerois;
$options->focusablerois = $question->focusablerois;
$options = $this->save_combined_feedback_helper($options, $question, $context, true);
$options->correctfeedback = qtype_omerocommon::serialize_to_multilang_form($question->correctfeedback_locale_map);
$options->partiallycorrectfeedback = qtype_omerocommon::serialize_to_multilang_form($question->partiallycorrectfeedback_locale_map);
$options->incorrectfeedback = qtype_omerocommon::serialize_to_multilang_form($question->incorrectfeedback_locale_map);
$DB->update_record($this->get_table_name(), $options);
$this->save_hints($question, true);
// Perform sanity checks on fractional grades.
if ($options->single) {
if ($maxfraction != 1) {
$result->notice = get_string('fractionsnomax', 'qtype_multichoice', $maxfraction * 100);
return $result;
}
} else {
$totalfraction = round($totalfraction, 2);
if ($totalfraction != 1) {
$result->notice = get_string('fractionsaddwrong', 'qtype_multichoice', $totalfraction * 100);
return $result;
}
}
}
/**
* Serialize a JSON array of a multilang text to HTML
*
* @param $json_format
* @return string
*/
public static function serialize_to_multilang_form($json_format)
{
$result = "";
$languages = array();
$json_data = json_decode($json_format);
foreach ($json_data as $lang => $text) {
if (!empty(strip_tags($text)) && !in_array($lang, $languages)) {
$result .= '<div class="multilang" lang="' . $lang . '">' . $text . '</div>';
array_push($languages, $lang);
}
}
return qtype_omerocommon::normalize_html_text($result);
}