matching.classes.inc in Quiz 7.5
Same filename and directory in other branches
- 6.6 question_types/matching/matching.classes.inc
- 6.3 question_types/matching/matching.classes.inc
- 6.4 question_types/matching/matching.classes.inc
- 6.5 question_types/matching/matching.classes.inc
- 7.6 question_types/matching/matching.classes.inc
- 7 question_types/matching/matching.classes.inc
- 7.4 question_types/matching/matching.classes.inc
Matching classes.
This module uses the question interface to define the matching question type.
A Matching node defines a series of questions and answers and requires the userto associate each answer with a question.
File
question_types/matching/matching.classes.incView source
<?php
/**
* @file
* Matching classes.
*
* This module uses the question interface to define the matching question type.
*
* A Matching node defines a series of questions and answers and requires the
* userto associate each answer with a question.
*/
/**
* Extension of QuizQuestion.
*/
class MatchingQuestion extends QuizQuestion {
/**
* Constructor
*
* @param $node
* matching node
*/
public function __construct(stdClass $node) {
parent::__construct($node);
if (empty($this->node->match)) {
$this->node->match = array();
}
}
/**
* Implementation of saveNodeProperties().
*
* @see QuizQuestion::saveNodeProperties()
*/
public function saveNodeProperties($is_new = FALSE) {
// Update or insert the question properties.
db_merge('quiz_matching_properties')
->key(array(
'nid' => $this->node->nid,
'vid' => $this->node->vid,
))
->fields(array(
'choice_penalty' => intval($this->node->choice_penalty),
))
->execute();
// Loop through each question-answer combination.
foreach ($this->node->match as $match) {
$match['feedback'] = isset($match['feedback']) ? $match['feedback'] : '';
// match_id is not so it is a new question.
if ($is_new || empty($match['match_id']) || $this->node->revision || isset($this->node->node_export_drupal_version)) {
if (!empty($match['question']) && !empty($match['answer'])) {
$id = db_insert('quiz_matching_node')
->fields(array(
'nid' => $this->node->nid,
'vid' => $this->node->vid,
'question' => $match['question'],
'answer' => $match['answer'],
'feedback' => $match['feedback'],
))
->execute();
}
}
else {
if (empty($match['question']) && empty($match['answer'])) {
// remove sub question.
db_delete('quiz_matching_node')
->condition('match_id', $match['match_id'])
->execute();
}
else {
// update sub question.
db_update('quiz_matching_node')
->fields(array(
'question' => $match['question'],
'answer' => $match['answer'],
'feedback' => $match['feedback'],
))
->condition('match_id', $match['match_id'])
->execute();
}
}
}
}
/**
* Implementation of validateNode().
*
* @see QuizQuestion::validateNode()
*/
public function validateNode(array &$form) {
// No validation is required.
// The first two pairs are required in the form, if there are other errors we forgive them.
}
/**
* Implementation of delete().
*
* @see QuizQuestion::delete()
*/
public function delete($only_this_version = FALSE) {
parent::delete($only_this_version);
$delete_properties = db_delete('quiz_matching_properties')
->condition('nid', $this->node->nid);
if ($only_this_version) {
$delete_properties
->condition('vid', $this->node->vid);
db_delete('quiz_matching_node')
->condition('nid', $this->node->nid)
->condition('vid', $this->node->vid)
->execute();
}
else {
db_delete('quiz_matching_node')
->condition('nid', $this->node->nid)
->execute();
}
$delete_properties
->execute();
}
/**
* Implementation of getNodeProperties().
*
* @see QuizQuestion::getNodeProperties()
*/
public function getNodeProperties() {
if (isset($this->nodeProperties)) {
return $this->nodeProperties;
}
$props = parent::getNodeProperties();
$res_a = db_query('SELECT choice_penalty FROM {quiz_matching_properties}
WHERE nid = :nid AND vid = :vid', array(
':nid' => $this->node->nid,
':vid' => $this->node->vid,
))
->fetchAssoc();
if (is_array($res_a)) {
$props = array_merge($props, $res_a);
}
//$sql = "SELECT match_id, question, answer, feedback FROM {quiz_matching_node} WHERE nid = %d AND vid = %d";
$query = db_query('SELECT match_id, question, answer, feedback FROM {quiz_matching_node} WHERE nid = :nid AND vid = :vid', array(
':nid' => $this->node->nid,
':vid' => $this->node->vid,
));
while ($result = $query
->fetch()) {
$props['match'][] = array(
'match_id' => $result->match_id,
'question' => $result->question,
'answer' => $result->answer,
'feedback' => $result->feedback,
);
}
$this->nodeProperties = $props;
return $props;
}
/**
* Implementation of getNodeView().
*
* @see QuizQuestion::getNodeView()
*/
public function getNodeView() {
$content = parent::getNodeView();
list($matches, $select_option) = $this
->getSubquestions();
$subquestions = array();
if ($this
->viewCanRevealCorrect()) {
foreach ($matches as $match) {
$subquestions[] = array(
'question' => $match['question'],
'correct' => $match['answer'],
'feedback' => $match['feedback'],
);
}
}
else {
// shuffle the answer column.
foreach ($matches as $match) {
$sub_qs[] = $match['question'];
$sub_as[] = $match['answer'];
}
shuffle($sub_as);
foreach ($sub_qs as $i => $sub_q) {
$subquestions[] = array(
'question' => $sub_q,
'random' => $sub_as[$i],
);
}
}
$content['answers'] = array(
'#markup' => theme('matching_match_node_view', array(
'subquestions' => $subquestions,
)),
'#weight' => 2,
);
return $content;
}
/**
* Implementation of getAnsweringForm().
*
* @see QuizQuestion::getAnsweringForm()
*/
public function getAnsweringForm(array $form_state = NULL, $result_id) {
$form = parent::getAnsweringForm($form_state, $result_id);
if (isset($result_id)) {
// The question has already been answered. We load the answers.
$response = new MatchingResponse($result_id, $this->node);
$responses = $response
->getResponse();
}
list($matches, $select_option) = $this
->getSubquestions();
//$form['#theme'] = 'matching_subquestion_form';
foreach ($matches as $match) {
$form[$match['match_id']] = array(
'#title' => $match['question'],
'#type' => 'select',
'#options' => array(
'def' => '',
),
);
$form[$match['match_id']]['#options'] += $this
->customShuffle($select_option);
if ($responses) {
// If this question already has been answered.
$form[$match['match_id']]['#default_value'] = $responses[$match['match_id']];
}
}
if (variable_get('quiz_matching_shuffle_options', TRUE)) {
$form = $this
->customShuffle($form);
}
$form['scoring_info'] = array(
'#access' => !empty($this->node->choice_penalty),
'#markup' => '<p><em>' . t('You lose points by selecting incorrect options. You may leave an option blank to avoid losing points.') . '</em></p>',
);
return $form;
}
/**
* Question response validator.
*/
public function getAnsweringFormValidate(array &$element, &$values) {
foreach ($values as $value) {
if ($value != 'def') {
return TRUE;
}
}
form_error($element, t('You need to match at least one of the items.'));
}
/**
* Shuffles an array, but keep the keys.
*
* @param array $array
* Array to be shuffled
* @return array
* A shuffled version of the array with keys preserved.
*/
private function customShuffle(array $array = array()) {
$new_array = array();
while (count($array)) {
$element = array_rand($array);
$new_array[$element] = $array[$element];
unset($array[$element]);
}
return $new_array;
}
/**
* Helper function to fetch subquestions
*
* @return array
* Array with two arrays, matches and selected options
*/
public function getSubquestions() {
$matches = $select_option = array();
//$sql = "SELECT match_id, question, answer, feedback FROM {quiz_matching_node} WHERE nid = %d AND vid = %d";
$query = db_query('SELECT match_id, question, answer, feedback FROM {quiz_matching_node} WHERE nid = :nid AND vid = :vid', array(
':nid' => $this->node->nid,
':vid' => $this->node->vid,
));
while ($result = $query
->fetch()) {
$matches[] = array(
'match_id' => $result->match_id,
'question' => $result->question,
'answer' => $result->answer,
'feedback' => $result->feedback,
);
$select_option[$result->match_id] = $result->answer;
}
return array(
$matches,
$select_option,
);
}
/**
* Implementation of getBodyFieldTitle().
*
* @see QuizQuestion::getBodyFieldTitle()
*/
public function getBodyFieldTitle() {
return t('Instruction');
}
/**
* Implementation of getCreationForm().
*
* @see QuizQuestion::getCreationForm()
*/
public function getCreationForm(array &$form_state = NULL) {
// Get the nodes settings, users settings or default settings.
$default_settings = $this
->getDefaultAltSettings();
$form['settings'] = array(
'#type' => 'fieldset',
'#title' => t('Settings'),
'#collapsible' => TRUE,
'#collapsed' => FALSE,
);
$form['settings']['choice_penalty'] = array(
'#type' => 'checkbox',
'#title' => t('Penalty for guessing'),
'#description' => t('Subtract 1 point from the users score for each incorrect match. Scores cannot go below 0.'),
'#default_value' => $default_settings['choice_penalty'],
'#parents' => array(
'choice_penalty',
),
);
$form['match'] = array(
'#type' => 'fieldset',
'#title' => t('Answer'),
'#weight' => -4,
'#tree' => TRUE,
'#theme' => 'matching_question_form',
'#description' => t('Write your pairs in the question and answer columns. For the user the question will be fixed and the answers will be shown as alternatives in a dropdown box.'),
);
for ($i = 1; $i <= variable_get('quiz_matching_form_size', 5); ++$i) {
$form['match'][$i] = array(
'#type' => 'fieldset',
'#title' => t('Question ' . $i),
);
$form['match'][$i]['match_id'] = array(
'#type' => 'value',
'#default_value' => isset($this->node->match[$i - 1]['match_id']) ? $this->node->match[$i - 1]['match_id'] : '',
);
$form['match'][$i]['question'] = array(
'#type' => 'textarea',
'#rows' => 2,
'#default_value' => isset($this->node->match[$i - 1]['question']) ? $this->node->match[$i - 1]['question'] : '',
'#required' => $i < 3,
);
$form['match'][$i]['answer'] = array(
'#type' => 'textarea',
'#rows' => 2,
'#default_value' => isset($this->node->match[$i - 1]['answer']) ? $this->node->match[$i - 1]['answer'] : '',
'#required' => $i < 3,
);
$form['match'][$i]['feedback'] = array(
'#type' => 'textarea',
'#rows' => 2,
'#default_value' => isset($this->node->match[$i - 1]['feedback']) ? $this->node->match[$i - 1]['feedback'] : '',
);
}
return $form;
}
/**
* Helper function providing the default settings for the creation form.
*
* @return array
* Array with the default settings
*/
private function getDefaultAltSettings() {
// If the node is being updated the default settings are those stored in the node.
if (isset($this->node->nid)) {
$settings['choice_penalty'] = $this->node->choice_penalty;
}
else {
$settings['choice_penalty'] = 0;
}
return $settings;
}
/**
* Implementation of getMaximumScore().
*
* @see QuizQuestion::getMaximumScore()
*/
public function getMaximumScore() {
$to_return = 0;
foreach ($this->node->match as $match) {
if (empty($match['question']) || empty($match['answer'])) {
continue;
}
$to_return++;
}
// The maximum score = the number of sub-questions.
return $to_return;
}
/**
* Get the correct answers for this question.
*
* @return array
* Array of correct answers
*/
public function getCorrectAnswer() {
$correct_answers = array();
$query = db_query('SELECT match_id, question, answer, feedback FROM {quiz_matching_node} WHERE nid = :nid AND vid = :vid', array(
':nid' => $this->node->nid,
':vid' => $this->node->vid,
));
while ($result = $query
->fetch()) {
$correct_answers[$result->match_id] = array(
'match_id' => $result->match_id,
'question' => $result->question,
'answer' => $result->answer,
'feedback' => $result->feedback,
);
}
return $correct_answers;
}
}
/**
* Extension of QuizQuestionResponse
*/
class MatchingResponse extends QuizQuestionResponse {
/**
* Constructor.
*
* @param int $result_id
* The result ID for the user's result set. There is one result ID per time
* the user takes a quiz.
* @param stdClass $question_node
* The question node.
* @param mixed $answer
* The answer (dependent on question type).
*/
public function __construct($result_id, stdClass $question_node, $answer = NULL) {
parent::__construct($result_id, $question_node, $answer);
if (!isset($answer)) {
$res = db_query('SELECT ua.answer, score, ua.match_id FROM {quiz_matching_user_answers} ua
JOIN {quiz_matching_node} n ON n.match_id = ua.match_id
WHERE n.nid = :nid AND n.vid = :vid AND ua.result_answer_id = :result_answer_id', array(
':nid' => $question_node->nid,
':vid' => $question_node->vid,
':result_answer_id' => $this->result_answer_id,
));
$this->answer = array();
while ($obj = $res
->fetch()) {
$this->answer[$obj->match_id] = $obj->answer;
}
}
$this->is_correct = $this
->isCorrect();
}
/**
* Implementation of save().
*
* @see QuizQuestionResponse::save()
*/
public function save() {
$this
->delete();
$insert = db_insert('quiz_matching_user_answers')
->fields(array(
'match_id',
'result_answer_id',
'answer',
'score',
));
foreach ($this->answer as $key => $value) {
$insert
->values(array(
'match_id' => $key,
'result_answer_id' => $this->result_answer_id,
'answer' => (int) $value,
'score' => $key == $value ? 1 : 0,
));
}
$insert
->execute();
}
/**
* Implementation of delete().
*
* @see QuizQuestionResponse::delete()
*/
public function delete() {
db_delete('quiz_matching_user_answers')
->condition('result_answer_id', $this->result_answer_id)
->execute();
}
/**
* Implementation of score().
*
* @see QuizQuestionResponse::score()
*/
public function score() {
$wrong_answer = 0;
$correct_answer = 0;
$user_answers = isset($this->answer['answer']) ? $this->answer['answer'] : $this->answer;
$MatchingQuestion = new MatchingQuestion($this->question);
$correct_answers = $MatchingQuestion
->getCorrectAnswer();
foreach ((array) $user_answers as $key => $value) {
if ($value != 0 && $correct_answers[$key]['answer'] == $correct_answers[$value]['answer']) {
$correct_answer++;
}
elseif ($value == 0 || $value == 'def') {
}
else {
$wrong_answer++;
}
}
$score = $correct_answer;
if ($this->question->choice_penalty) {
$score -= $wrong_answer;
}
return $score < 0 ? 0 : $score;
}
/**
* Implementation of getResponse().
*
* @see QuizQuestionResponse::getResponse()
*/
public function getResponse() {
return $this->answer;
}
/**
* Implementation of getFeedbackValues().
*
* @see QuizQuestionResponse::getFeedbackValues()
*/
public function getFeedbackValues() {
$data = array();
$answers = $this->question->answers[0]['answer'];
$solution = $this->quizQuestion
->getSubquestions();
foreach ($this->question->match as $match) {
$data[] = array(
'choice' => $match['question'],
'attempt' => !empty($answers[$match['match_id']]) ? $solution[1][$answers[$match['match_id']]] : '',
'correct' => $answers[$match['match_id']] == $match['match_id'] ? theme('quiz_answer_result', array(
'type' => 'correct',
)) : theme('quiz_answer_result', array(
'type' => 'incorrect',
)),
'score' => $answers[$match['match_id']] == $match['match_id'] ? 1 : 0,
'answer_feedback' => $match['feedback'],
'question_feedback' => 'Question feedback',
'solution' => $solution[1][$match['match_id']],
'quiz_feedback' => "Quiz feedback",
);
}
return $data;
}
/**
* Get answers for a question in a result.
*
* This static method assists in building views for the mass export of
* question answers.
*
* @see views_handler_field_prerender_list for the expected return value.
*/
public static function viewsGetAnswers(array $result_answer_ids = array()) {
$items = array();
foreach ($result_answer_ids as $result_answer_id) {
$ra = entity_load_single('quiz_result_answer', $result_answer_id);
$question = node_load($ra->question_nid, $ra->question_vid);
/** @var $ra_i QuizQuestionResponse */
$ra_i = _quiz_question_response_get_instance($ra->result_id, $question);
$matches = array();
foreach ($question->match as $match) {
$matches[$match['match_id']] = $match;
}
foreach ($ra_i
->getResponse() as $question_id => $answer_id) {
if (!empty($answer_id)) {
$items[$ra->result_id][] = array(
'answer' => $matches[$question_id]['question'] . ': ' . $matches[$answer_id]['answer'],
);
}
}
}
return $items;
}
}
Classes
Name![]() |
Description |
---|---|
MatchingQuestion | Extension of QuizQuestion. |
MatchingResponse | Extension of QuizQuestionResponse |