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561 lines
20 KiB
561 lines
20 KiB
<?php
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/**
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* @copyright (c) 2001-2006 Universite catholique de Louvain (UCL)
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*
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* @license http://www.gnu.org/copyleft/gpl.html (GPL) GENERAL PUBLIC LICENSE
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*
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* @package chamilo.exercise
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*
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* @author claro team <cvs@claroline.net>
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* @author Guillaume Lederer <guillaume@claroline.net>
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*/
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/**
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* function to create a temporary directory (SAME AS IN MODULE ADMIN)
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*/
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function tempdir($dir, $prefix = 'tmp', $mode = 0777)
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{
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if (substr($dir, -1) != '/') {
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$dir .= '/';
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}
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do {
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$path = $dir . $prefix . mt_rand(0, 9999999);
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} while (!mkdir($path, $mode));
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return $path;
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}
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/**
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* Unzip the exercise in the temp folder
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* @param string The path of the temporary directory where the exercise was uploaded and unzipped
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* @param string
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* @return bool
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*/
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function get_and_unzip_uploaded_exercise($baseWorkDir, $uploadPath)
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{
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$_course = api_get_course_info();
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$_user = api_get_user_info();
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//Check if the file is valid (not to big and exists)
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if (!isset($_FILES['userFile']) || !is_uploaded_file($_FILES['userFile']['tmp_name'])) {
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// upload failed
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return false;
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}
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if (preg_match('/.zip$/i', $_FILES['userFile']['name']) &&
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handle_uploaded_document(
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$_course,
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$_FILES['userFile'],
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$baseWorkDir,
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$uploadPath,
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$_user['user_id'],
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0,
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null,
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1
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)
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) {
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return true;
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}
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return false;
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}
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/**
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* Imports an exercise in QTI format if the XML structure can be found in it
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* @param array $file
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* @return an array as a backlog of what was really imported, and error or debug messages to display
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*/
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function import_exercise($file)
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{
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global $exercise_info;
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global $element_pile;
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global $non_HTML_tag_to_avoid;
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global $record_item_body;
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// used to specify the question directory where files could be found in relation in any question
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global $questionTempDir;
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$archive_path = api_get_path(SYS_ARCHIVE_PATH) . 'qti2';
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$baseWorkDir = $archive_path;
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if (!is_dir($baseWorkDir)) {
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mkdir($baseWorkDir, api_get_permissions_for_new_directories(), true);
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}
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$uploadPath = '/';
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// set some default values for the new exercise
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$exercise_info = array();
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$exercise_info['name'] = preg_replace('/.zip$/i', '', $file);
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$exercise_info['question'] = array();
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$element_pile = array();
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// create parser and array to retrieve info from manifest
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$element_pile = array(); //pile to known the depth in which we are
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//$module_info = array (); //array to store the info we need
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// if file is not a .zip, then we cancel all
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if (!preg_match('/.zip$/i', $file)) {
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return 'UplZipCorrupt';
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}
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// unzip the uploaded file in a tmp directory
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if (!get_and_unzip_uploaded_exercise($baseWorkDir, $uploadPath)) {
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return 'UplZipCorrupt';
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}
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// find the different manifests for each question and parse them.
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$exerciseHandle = opendir($baseWorkDir);
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//$question_number = 0;
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$file_found = false;
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$operation = false;
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$result = false;
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$filePath = null;
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// parse every subdirectory to search xml question files
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while (false !== ($file = readdir($exerciseHandle))) {
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if (is_dir($baseWorkDir . '/' . $file) && $file != "." && $file != "..") {
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// Find each manifest for each question repository found
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$questionHandle = opendir($baseWorkDir . '/' . $file);
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while (false !== ($questionFile = readdir($questionHandle))) {
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if (preg_match('/.xml$/i', $questionFile)) {
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$result = parse_file($baseWorkDir, $file, $questionFile);
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$filePath = $baseWorkDir . $file;
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$file_found = true;
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}
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}
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} elseif (preg_match('/.xml$/i', $file)) {
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// Else ignore file
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$result = parse_file($baseWorkDir, '', $file);
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$filePath = $baseWorkDir . '/' . $file;
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$file_found = true;
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}
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}
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if (!$file_found) {
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return 'NoXMLFileFoundInTheZip';
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}
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if ($result == false) {
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return false;
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}
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$doc = new DOMDocument();
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$doc->load($filePath);
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$encoding = $doc->encoding;
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// 1. Create exercise.
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$exercise = new Exercise();
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$exercise->exercise = $exercise_info['name'];
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$exercise->save();
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$last_exercise_id = $exercise->selectId();
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if (!empty($last_exercise_id)) {
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// For each question found...
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foreach ($exercise_info['question'] as $question_array) {
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//2. Create question
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$question = new Ims2Question();
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$question->type = $question_array['type'];
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$question->setAnswer();
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$question->updateTitle(formatText($question_array['title']));
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//$question->updateDescription($question_array['title']);
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$type = $question->selectType();
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$question->type = constant($type);
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$question->save($last_exercise_id);
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$last_question_id = $question->selectId();
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//3. Create answer
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$answer = new Answer($last_question_id);
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$answer->new_nbrAnswers = count($question_array['answer']);
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$totalCorrectWeight = 0;
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foreach ($question_array['answer'] as $key => $answers) {
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$split = explode('_', $key);
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$i = $split[1];
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// Answer
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$answer->new_answer[$i] = formatText($answers['value']);
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// Comment
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$answer->new_comment[$i] = isset($answers['feedback']) ? formatText($answers['feedback']) : null;
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// Position
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$answer->new_position[$i] = $i;
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// Correct answers
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if (in_array($key, $question_array['correct_answers'])) {
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$answer->new_correct[$i] = 1;
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} else {
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$answer->new_correct[$i] = 0;
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}
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$answer->new_weighting[$i] = $question_array['weighting'][$key];
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if ($answer->new_correct[$i]) {
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$totalCorrectWeight = $answer->new_weighting[$i];
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}
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}
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$question->updateWeighting($totalCorrectWeight);
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$question->save($last_exercise_id);
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$answer->save();
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}
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// delete the temp dir where the exercise was unzipped
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my_delete($baseWorkDir . $uploadPath);
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return $last_exercise_id;
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}
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return false;
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}
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/**
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* We assume the file charset is UTF8
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**/
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function formatText($text)
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{
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return api_html_entity_decode($text);
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}
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/**
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* Parses a given XML file and fills global arrays with the elements
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* @param $exercisePath
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* @param $file
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* @param $questionFile
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* @return bool
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*/
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function parse_file($exercisePath, $file, $questionFile)
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{
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global $non_HTML_tag_to_avoid;
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global $record_item_body;
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global $questionTempDir;
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$questionTempDir = $exercisePath . '/' . $file . '/';
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$questionFilePath = $questionTempDir . $questionFile;
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if (!($fp = fopen($questionFilePath, 'r'))) {
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Display:: display_error_message(get_lang('Error opening question\'s XML file'));
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return false;
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} else {
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$data = fread($fp, filesize($questionFilePath));
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}
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//parse XML question file
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$data = str_replace(array('<p>', '</p>', '<front>', '</front>'), '', $data);
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//used global variable start values declaration :
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$record_item_body = false;
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$non_HTML_tag_to_avoid = array(
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"SIMPLECHOICE",
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"CHOICEINTERACTION",
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"INLINECHOICEINTERACTION",
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"INLINECHOICE",
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"SIMPLEMATCHSET",
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"SIMPLEASSOCIABLECHOICE",
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"TEXTENTRYINTERACTION",
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"FEEDBACKINLINE",
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"MATCHINTERACTION",
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"ITEMBODY",
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"BR",
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"IMG"
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);
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$question_format_supported = true;
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$xml_parser = xml_parser_create();
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xml_parser_set_option($xml_parser, XML_OPTION_SKIP_WHITE, false);
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xml_set_element_handler($xml_parser, 'startElement', 'endElement');
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xml_set_character_data_handler($xml_parser, 'elementData');
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if (!xml_parse($xml_parser, $data, feof($fp))) {
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// if reading of the xml file in not successful :
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// set errorFound, set error msg, break while statement
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Display:: display_error_message(get_lang('Error reading XML file'));
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return false;
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}
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//close file
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fclose($fp);
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if (!$question_format_supported) {
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Display:: display_error_message(
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get_lang(
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'Unknown question format in file %file',
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array(
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'%file' => $questionFile
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)
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)
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);
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return false;
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}
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return true;
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}
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/**
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* Function used by the SAX xml parser when the parser meets a opening tag
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*
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* @param object $parser xml parser created with "xml_parser_create()"
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* @param string $name name of the element
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* @param array $attributes
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*/
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function startElement($parser, $name, $attributes)
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{
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global $element_pile;
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global $exercise_info;
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global $current_question_ident;
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global $current_answer_id;
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global $current_match_set;
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global $currentAssociableChoice;
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global $current_question_item_body;
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global $record_item_body;
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global $non_HTML_tag_to_avoid;
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global $current_inlinechoice_id;
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global $cardinality;
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global $questionTempDir;
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array_push($element_pile, $name);
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$current_element = end($element_pile);
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if (sizeof($element_pile) >= 2) {
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$parent_element = $element_pile[sizeof($element_pile) - 2];
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} else {
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$parent_element = "";
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}
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if (sizeof($element_pile) >= 3) {
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$grant_parent_element = $element_pile[sizeof($element_pile) - 3];
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} else {
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$grant_parent_element = "";
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}
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if ($record_item_body) {
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if ((!in_array($current_element, $non_HTML_tag_to_avoid))) {
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$current_question_item_body .= "<" . $name;
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foreach ($attributes as $attribute_name => $attribute_value) {
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$current_question_item_body .= " " . $attribute_name . "=\"" . $attribute_value . "\"";
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}
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$current_question_item_body .= ">";
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} else {
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//in case of FIB question, we replace the IMS-QTI tag b y the correct answer between "[" "]",
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//we first save with claroline tags ,then when the answer will be parsed, the claroline tags will be replaced
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if ($current_element == 'INLINECHOICEINTERACTION') {
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$current_question_item_body .= "**claroline_start**" . $attributes['RESPONSEIDENTIFIER'] . "**claroline_end**";
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}
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if ($current_element == 'TEXTENTRYINTERACTION') {
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$correct_answer_value = $exercise_info['question'][$current_question_ident]['correct_answers'][$current_answer_id];
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$current_question_item_body .= "[" . $correct_answer_value . "]";
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}
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if ($current_element == 'BR') {
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$current_question_item_body .= "<br />";
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}
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}
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}
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switch ($current_element) {
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case 'ASSESSMENTITEM':
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//retrieve current question
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$current_question_ident = $attributes['IDENTIFIER'];
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$exercise_info['question'][$current_question_ident] = array();
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$exercise_info['question'][$current_question_ident]['answer'] = array();
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$exercise_info['question'][$current_question_ident]['correct_answers'] = array();
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$exercise_info['question'][$current_question_ident]['title'] = $attributes['TITLE'];
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$exercise_info['question'][$current_question_ident]['tempdir'] = $questionTempDir;
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break;
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case 'SECTION':
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//retrieve exercise name
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$exercise_info['name'] = $attributes['TITLE'];
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break;
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case 'RESPONSEDECLARATION':
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// Retrieve question type
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if ("multiple" == $attributes['CARDINALITY']) {
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$exercise_info['question'][$current_question_ident]['type'] = 'MCMA';
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$cardinality = 'multiple';
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}
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if ("single" == $attributes['CARDINALITY']) {
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$exercise_info['question'][$current_question_ident]['type'] = 'MCUA';
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$cardinality = 'single';
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}
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//needed for FIB
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$current_answer_id = $attributes['IDENTIFIER'];
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break;
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case 'INLINECHOICEINTERACTION':
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$exercise_info['question'][$current_question_ident]['type'] = 'FIB';
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$exercise_info['question'][$current_question_ident]['subtype'] = 'LISTBOX_FILL';
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$current_answer_id = $attributes['RESPONSEIDENTIFIER'];
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break;
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case 'INLINECHOICE':
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$current_inlinechoice_id = $attributes['IDENTIFIER'];
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break;
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case 'TEXTENTRYINTERACTION':
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$exercise_info['question'][$current_question_ident]['type'] = 'FIB';
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$exercise_info['question'][$current_question_ident]['subtype'] = 'TEXTFIELD_FILL';
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$exercise_info['question'][$current_question_ident]['response_text'] = $current_question_item_body;
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//replace claroline tags
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break;
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case 'MATCHINTERACTION':
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$exercise_info['question'][$current_question_ident]['type'] = 'MATCHING';
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break;
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case 'SIMPLEMATCHSET':
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if (!isset ($current_match_set)) {
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$current_match_set = 1;
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} else {
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$current_match_set++;
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}
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$exercise_info['question'][$current_question_ident]['answer'][$current_match_set] = array();
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break;
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case 'SIMPLEASSOCIABLECHOICE':
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$currentAssociableChoice = $attributes['IDENTIFIER'];
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break;
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//retrieve answers id for MCUA and MCMA questions
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case 'SIMPLECHOICE':
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$current_answer_id = $attributes['IDENTIFIER'];
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if (!isset($exercise_info['question'][$current_question_ident]['answer'][$current_answer_id])) {
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$exercise_info['question'][$current_question_ident]['answer'][$current_answer_id] = array();
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}
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break;
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case 'MAPENTRY':
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if ($parent_element == "MAPPING") {
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$answer_id = $attributes['MAPKEY'];
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if (!isset ($exercise_info['question'][$current_question_ident]['weighting'])) {
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$exercise_info['question'][$current_question_ident]['weighting'] = array();
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}
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$exercise_info['question'][$current_question_ident]['weighting'][$answer_id] = $attributes['MAPPEDVALUE'];
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}
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break;
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case 'MAPPING':
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if (isset ($attributes['DEFAULTVALUE'])) {
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$exercise_info['question'][$current_question_ident]['default_weighting'] = $attributes['DEFAULTVALUE'];
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}
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case 'ITEMBODY':
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$record_item_body = true;
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$current_question_item_body = '';
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break;
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case 'IMG':
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$exercise_info['question'][$current_question_ident]['attached_file_url'] = $attributes['SRC'];
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break;
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}
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}
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/**
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* Function used by the SAX xml parser when the parser meets a closing tag
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*
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* @param $parser xml parser created with "xml_parser_create()"
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* @param $name name of the element
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*/
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function endElement($parser, $name)
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{
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global $element_pile;
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global $exercise_info;
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global $current_question_ident;
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global $record_item_body;
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global $current_question_item_body;
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global $non_HTML_tag_to_avoid;
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global $cardinality;
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$current_element = end($element_pile);
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//treat the record of the full content of itembody tag :
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if ($record_item_body && (!in_array($current_element, $non_HTML_tag_to_avoid))) {
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$current_question_item_body .= "</" . $name . ">";
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}
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switch ($name) {
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case 'ITEMBODY':
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$record_item_body = false;
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if ($exercise_info['question'][$current_question_ident]['type'] == 'FIB') {
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$exercise_info['question'][$current_question_ident]['response_text'] = $current_question_item_body;
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} else {
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$exercise_info['question'][$current_question_ident]['statement'] = $current_question_item_body;
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}
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break;
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}
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array_pop($element_pile);
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}
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/**
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* @param $parser
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* @param $data
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*/
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function elementData($parser, $data)
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{
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global $element_pile;
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global $exercise_info;
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global $current_question_ident;
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global $current_answer_id;
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global $current_match_set;
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global $currentAssociableChoice;
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global $current_question_item_body;
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global $record_item_body;
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global $non_HTML_tag_to_avoid;
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global $current_inlinechoice_id;
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global $cardinality;
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$current_element = end($element_pile);
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if (sizeof($element_pile) >= 2) {
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$parent_element = $element_pile[sizeof($element_pile) - 2];
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} else {
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$parent_element = "";
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}
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if (sizeof($element_pile) >= 3) {
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$grant_parent_element = $element_pile[sizeof($element_pile) - 3];
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} else {
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$grant_parent_element = "";
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}
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//treat the record of the full content of itembody tag (needed for question statment and/or FIB text:
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if ($record_item_body && (!in_array($current_element, $non_HTML_tag_to_avoid))) {
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$current_question_item_body .= $data;
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}
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switch ($current_element) {
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case 'SIMPLECHOICE':
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if (!isset ($exercise_info['question'][$current_question_ident]['answer'][$current_answer_id]['value'])) {
|
|
$exercise_info['question'][$current_question_ident]['answer'][$current_answer_id]['value'] = trim($data);
|
|
} else {
|
|
$exercise_info['question'][$current_question_ident]['answer'][$current_answer_id]['value'] .= '' . trim($data);
|
|
}
|
|
break;
|
|
case 'FEEDBACKINLINE':
|
|
if (!isset ($exercise_info['question'][$current_question_ident]['answer'][$current_answer_id]['feedback'])) {
|
|
$exercise_info['question'][$current_question_ident]['answer'][$current_answer_id]['feedback'] = trim($data);
|
|
} else {
|
|
$exercise_info['question'][$current_question_ident]['answer'][$current_answer_id]['feedback'] .= ' ' . trim($data);
|
|
}
|
|
break;
|
|
case 'SIMPLEASSOCIABLECHOICE':
|
|
$exercise_info['question'][$current_question_ident]['answer'][$current_match_set][$currentAssociableChoice] = trim($data);
|
|
break;
|
|
case 'VALUE':
|
|
if ($parent_element == "CORRECTRESPONSE") {
|
|
if ($cardinality == "single") {
|
|
$exercise_info['question'][$current_question_ident]['correct_answers'][$current_answer_id] = $data;
|
|
} else {
|
|
$exercise_info['question'][$current_question_ident]['correct_answers'][] = $data;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 'ITEMBODY':
|
|
$current_question_item_body .= $data;
|
|
break;
|
|
case 'INLINECHOICE':
|
|
// if this is the right answer, then we must replace the claroline tags in the FIB text bye the answer between "[" and "]" :
|
|
$answer_identifier = $exercise_info['question'][$current_question_ident]['correct_answers'][$current_answer_id];
|
|
if ($current_inlinechoice_id == $answer_identifier) {
|
|
$current_question_item_body = str_replace(
|
|
"**claroline_start**" . $current_answer_id . "**claroline_end**",
|
|
"[" . $data . "]",
|
|
$current_question_item_body
|
|
);
|
|
} else {
|
|
if (!isset ($exercise_info['question'][$current_question_ident]['wrong_answers'])) {
|
|
$exercise_info['question'][$current_question_ident]['wrong_answers'] = array();
|
|
}
|
|
$exercise_info['question'][$current_question_ident]['wrong_answers'][] = $data;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|