function find_closest($question, $currentanswer, $correct_response = false, $hintadded = false)
{
global $CFG;
// JR dec 2011 moved get alternate answers to new function
$alternateanswers = get_alternateanswers($question);
$alternatecorrectanswers = array();
// JR jan 2012 changed contents of alternateanswers
if (isset($question->id)) {
$qid = $question->id;
if (!isset($SESSION->qtype_regexp_question->alternatecorrectanswers[$qid])) {
foreach ($alternateanswers as $key => $alternateanswer) {
foreach ($alternateanswer['answers'] as $alternate) {
$alternatecorrectanswers[] = $alternate;
}
}
$SESSION->qtype_regexp_question->alternatecorrectanswers[$qid] = $alternatecorrectanswers;
}
}
// testing ignorecase
$ignorecase = 'i';
if ($question->usecase) {
$ignorecase = '';
}
// only use ishint value if hint button has been clicked
$ishint = $question->usehint * $hintadded;
// find closest answer matching student response
if (!isset($currentanswer) && !$correct_response) {
return null;
}
if ($correct_response) {
return $alternatecorrectanswers;
}
$closest = get_closest($currentanswer, $alternatecorrectanswers, $ignorecase, $ishint);
if ($closest[2] == 'complete') {
return $closest;
}
// give first character of firstcorrectanswer to student (if option usehint for this question)
// TODO JR maybe not?
/*if ($closest[0] == '' && ($question->usehint == true) && $closest[2] == 'nil' ) {
$closest[0] = $textlib->substr($firstcorrectanswer, 0, 1);
}*/
/**
* Add question-type specific form fields.
*
* @param MoodleQuickForm $mform the form being built.
*/
protected function definition_inner($mform)
{
global $CFG, $OUTPUT, $SESSION;
require_once $CFG->dirroot . '/question/type/regexp/locallib.php';
$this->showalternate = false;
if ("" != optional_param('showalternate', '', PARAM_RAW)) {
$this->showalternate = true;
$this->questionid = optional_param('id', '', PARAM_NOTAGS);
$this->usecase = optional_param('usecase', '', PARAM_NOTAGS);
$this->studentshowalternate = optional_param('studentshowalternate', '', PARAM_NOTAGS);
$this->fraction = optional_param_array('fraction', '', PARAM_RAW);
$this->currentanswers = optional_param_array('answer', '', PARAM_NOTAGS);
//$this->feedback = optional_param('feedback', '', PARAM_NOTAGS);
// no longer works in moodle 2.2 and later see http://moodle.org/mod/forum/discuss.php?d=197118
// so use data_submitted() instead
$feedback = data_submitted()->feedback;
// we only need to get the feedback text, for validation purposes when showalternate is requested
foreach ($feedback as $key => $fb) {
$this->feedback[$key]['text'] = clean_param($fb['text'], PARAM_NOTAGS);
}
}
// JR added advanced settings to hide mostly unwanted hints and tags settings
if ("" != optional_param('addhint', '', PARAM_RAW)) {
$this->hints = optional_param('hint', '', PARAM_NOTAGS);
} elseif (isset($this->question->hints)) {
$this->hints = $this->question->hints;
}
$counthints = 0;
if (isset($this->hints)) {
$counthints = count($this->hints);
}
$mform->setAdvanced('tags');
for ($i = 0; $i < $counthints; $i++) {
$mform->setAdvanced("hint[{$i}]");
}
// hint mode :: None / Letter / Word
$menu = array(get_string('none'), get_string('letter', 'qtype_regexp'), get_string('word', 'qtype_regexp'));
$mform->addElement('select', 'usehint', get_string('usehint', 'qtype_regexp'), $menu);
$mform->addHelpButton('usehint', 'usehint', 'qtype_regexp');
// use case :: yes / no
$menu = array(get_string('caseno', 'qtype_regexp'), get_string('caseyes', 'qtype_regexp'));
$mform->addElement('select', 'usecase', get_string('casesensitive', 'qtype_regexp'), $menu);
// display all correct alternate answers to student on review page :: yes / no
$menu = array(get_string('no'), get_string('yes'));
$mform->addElement('select', 'studentshowalternate', get_string('studentshowalternate', 'qtype_regexp'), $menu);
$mform->addHelpButton('studentshowalternate', 'studentshowalternate', 'qtype_regexp');
//$mform->closeHeaderBefore('answersinstruct');
$mform->addElement('static', 'answersinstruct', 'Note.-', get_string('filloutoneanswer', 'qtype_regexp'));
$this->add_per_answer_fields($mform, get_string('answerno', 'qtype_shortanswer', '{no}'), question_bank::fraction_options(), $minoptions = 3, $addoptions = 1);
$mform->addElement('header', 'showhidealternate', get_string('showhidealternate', 'qtype_regexp'));
$mform->addHelpButton('showhidealternate', 'showhidealternate', 'qtype_regexp');
$buttonarray = array();
$buttonarray[] = $mform->createElement('submit', 'showalternate', get_string('showalternate', 'qtype_regexp'));
$mform->registerNoSubmitButton('showalternate');
if ($this->showalternate) {
$qu = new stdClass();
$qu->id = $this->questionid;
$qu->answers = array();
$i = 0;
$this->fraction[0] = 1;
$data = array();
foreach ($this->currentanswers as $key => $answer) {
$qu->answers[$i] = new stdClass();
$qu->answers[$i]->answer = $answer;
$qu->answers[$i]->fraction = $this->fraction[$i];
// for sending $data to validation
$data['answer'][$i] = $answer;
$data['fraction'][$i] = $this->fraction[$i];
$data['feedback'][$i] = $this->feedback[$i];
$i++;
}
$moodle_val = $this->validation($data, '');
if (is_array($moodle_val) && count($moodle_val) !== 0) {
// non-empty array means errors
foreach ($moodle_val as $element => $msg) {
$mform->setElementError($element, $msg);
}
// set to false in order to set hidealternate button to disabled
$this->showalternate = false;
} else {
// we need to unset SESSION in case Answers have been edited since last call to get_alternateanswers()
if (isset($SESSION->qtype_regexp_question->alternateanswers[$this->questionid])) {
unset($SESSION->qtype_regexp_question->alternateanswers[$this->questionid]);
}
$alternateanswers = get_alternateanswers($qu);
$mform->addElement('html', '<div class="alternateanswers">');
$alternatelist = '';
foreach ($alternateanswers as $key => $alternateanswer) {
$mform->addElement('static', 'alternateanswer', get_string('answer') . ' ' . $key . ' (' . $alternateanswer['fraction'] . ')', '<span class="regexp">' . $alternateanswer['regexp'] . '</span>');
$list = '';
foreach ($alternateanswer['answers'] as $alternate) {
$list .= '<li>' . $alternate . '</li>';
}
$mform->addElement('static', 'alternateanswer', '', '<ul class="square">' . $list . '</ul>');
}
$mform->addElement('html', '</div>');
}
}
$disabled = '';
if ($this->showalternate) {
$disabled = '';
} else {
$disabled = 'disabled';
}
$buttonarray[] = $mform->createElement('submit', 'hidealternate', get_string('hidealternate', 'qtype_regexp'), $disabled);
$mform->registerNoSubmitButton('hidealternate');
$mform->addGroup($buttonarray, '', '', array(' '), false);
$mform->addElement('header', 'multitriesheader', get_string('settingsformultipletries', 'qtype_regexp'));
$withclearwrong = false;
$withshownumpartscorrect = false;
$penalties = array(1.0, 0.5, 0.33, 0.25, 0.2, 0.1, 0.05, 0.0);
if (!empty($this->question->penalty) && !in_array($this->question->penalty, $penalties)) {
$penalties[] = $this->question->penalty;
sort($penalties);
}
$penaltyoptions = array();
foreach ($penalties as $penalty) {
$penaltyoptions["{$penalty}"] = 100 * $penalty . '%';
}
$mform->addElement('select', 'penalty', get_string('penaltyforeachincorrecttry', 'qtype_regexp'), $penaltyoptions);
$mform->addRule('penalty', null, 'required', null, 'client');
$mform->addHelpButton('penalty', 'penaltyforeachincorrecttry', 'qtype_regexp');
$mform->setDefault('penalty', 0.1);
if ($this->question->formoptions->repeatelements) {
//$repeatsatstart = max(self::DEFAULT_NUM_HINTS, $counthints);
// JR we suppose hints are not really needed in REGEXP question type, so set start nb at zero
$repeatsatstart = max(0, $counthints);
} else {
$repeatsatstart = $counthints;
}
if ($counthints != 0) {
$addhint = get_string('addanotherhint', 'question');
} else {
$addhint = get_string('addahint', 'qtype_regexp');
}
list($repeated, $repeatedoptions) = $this->get_hint_fields($withclearwrong, $withshownumpartscorrect);
$this->repeat_elements($repeated, $repeatsatstart, $repeatedoptions, 'numhints', 'addhint', 1, $addhint);
}
public function correct_response(question_attempt $qa)
{
$question = $qa->get_question();
$display_responses = '';
$alternateanswers = get_alternateanswers($question);
$bestcorrectanswer = $alternateanswers[1]['answers'][0];
if (count($alternateanswers) == 1) {
// no alternative answers besides the only "correct" answer
$display_responses .= get_string('correctansweris', 'qtype_regexp', $bestcorrectanswer);
} else {
$display_responses .= get_string('bestcorrectansweris', 'qtype_regexp', $bestcorrectanswer) . '<br />';
}
if ($question->studentshowalternate) {
foreach ($alternateanswers as $key => $alternateanswer) {
if ($key == 1) {
// first (correct) Answer
$display_responses .= get_string('correctanswersare', 'qtype_regexp') . '<br />';
} else {
$fraction = $alternateanswer['fraction'];
$display_responses .= "<strong>{$fraction}</strong><br>";
foreach ($alternateanswer['answers'] as $alternate) {
$display_responses .= $alternate . '<br />';
}
}
}
}
return $display_responses;
}