/**
* This function will add the attributes that are extracted from the qti xml
* into the database.
*
* @param array attributes that are extracted from the QTI XML.
* @return int the question ids.
*/
function importQuestions($attributes)
{
global $supported_media_type, $msg;
$qids = array();
foreach ($attributes as $resource => $attrs) {
if (preg_match('/imsqti\\_(.*)/', $attrs['type'])) {
//Instantiate class obj
$xml = new QTIParser($attrs['type']);
$xml_content = @file_get_contents($this->import_path . $attrs['href']);
$xml->setRelativePath($package_base_name);
if (!$xml->parse($xml_content)) {
$msg->addError('QTI_WRONG_PACKAGE');
break;
}
//set test title
$this->title = $xml->title;
//if ($attrs[href] =='56B1BEDC-A820-7AA8-A21D-F32017189445/56B1BEDC-A820-7AA8-A21D-F32017189445.xml'){
// debug($xml, 'attributes');
//}
//import file, should we use file href? or jsut this href?
//Aug 25, use both, so then it can check for respondus media as well.
foreach ($attrs['file'] as $file_id => $file_name) {
$file_pathinfo = pathinfo($file_name);
if ($file_pathinfo['basename'] == $attrs['href']) {
//This file will be parsed later
continue;
}
if (in_array(strtolower($file_pathinfo['extension']), $supported_media_type)) {
//copy medias over.
$this->copyMedia(array($file_name), $xml->items);
}
}
for ($loopcounter = 0; $loopcounter < $xml->item_num; $loopcounter++) {
//Create POST values.
unset($test_obj);
//clear cache
$test_obj['required'] = 1;
$test_obj['preset_num'] = 0;
$test_obj['category_id'] = 0;
$test_obj['question'] = $xml->question[$loopcounter];
$test_obj['feedback'] = $xml->feedback[$loopcounter];
$test_obj['groups'] = $xml->groups[$loopcounter];
$test_obj['property'] = intval($xml->attributes[$loopcounter]['render_fib']['property']);
$test_obj['choice'] = array();
$test_obj['answers'] = array();
//assign choices
$i = 0;
//trim values
if (is_array($xml->answers[$loopcounter])) {
array_walk($xml->answers[$loopcounter], 'trim_value');
}
//TODO: The groups is 1-0+ choices. So we should loop thru groups, not choices.
if (is_array($xml->choices[$loopcounter])) {
foreach ($xml->choices[$loopcounter] as $choiceNum => $choiceOpt) {
if (sizeof($test_obj['groups']) > 0) {
if (!empty($xml->answers[$loopcounter])) {
foreach ($xml->answers[$loopcounter] as $ansNum => $ansOpt) {
if ($choiceNum == $ansOpt) {
//Not exactly efficient, worst case N^2
$test_obj['answers'][$ansNum] = $i;
}
}
}
} else {
//save answer(s)
if (is_array($xml->answers[$loopcounter]) && in_array($choiceNum, $xml->answers[$loopcounter])) {
$test_obj['answers'][] = $i;
}
}
$test_obj['choice'][] = $choiceOpt;
$i++;
}
}
// unset($qti_import);
$this->constructParams($test_obj);
//debug($xml->getQuestionType($loopcounter), 'lp_'.$loopcounter);
//Create questions
$this->getQuestionType($xml->getQuestionType($loopcounter));
//save question id
$qids[] = $this->qid;
//Dependency handling
if (!empty($attrs['dependency'])) {
$xml_items = array_merge($xml_items, $xml->items);
}
}
//assign title
if ($xml->title != '') {
$this->title = $xml->title;
}
//assign marks/weights
$this->weights = $xml->weights;
$xml->close();
} elseif ($attrs['type'] == 'webcontent') {
//webcontent, copy it over.
$this->copyMedia($attrs['file'], $xml_items);
}
}
//debug($qids, 'qids');
return $qids;
}
/**
* Validate all the XML in the package, including checking XSDs, missing data.
* @param string the path of the directory that contains all the package files
* @return boolean true if every file exists in the manifest,
* false if any is missing.
*/
function checkResources($import_path)
{
global $items, $msg, $skip_ims_validation, $avail_dt;
if (!is_dir($import_path)) {
return;
}
//if the package has access for all content, skip validation for now.
//todo: import the XSD into our validator
if ($skip_ims_validation) {
return true;
}
//generate a file tree
$data = rscandir($import_path);
//check if every file is presented in the manifest
foreach ($data as $filepath) {
$filepath = substr($filepath, strlen($import_path));
//validate xml via its xsd/dtds
if (preg_match('/(.*)\\.xml/', $filepath)) {
libxml_use_internal_errors(true);
$dom = new DOMDocument();
$dom->load(realpath($import_path . $filepath));
if (!@$dom->schemaValidate('main.xsd')) {
$errors = libxml_get_errors();
foreach ($errors as $error) {
//suppress warnings
if ($error->level == LIBXML_ERR_WARNING) {
continue;
}
$msg->addError(array('IMPORT_CARTRIDGE_FAILED', libxml_display_error($error)));
}
libxml_clear_errors();
}
//if this is the manifest file, we do not have
//to check for its existance.
// if (preg_match('/(.*)imsmanifest\.xml/', $filepath)){
// continue;
// }
}
}
//Create an array that mimics the structure of the data array,
//based on the xml items
$filearray = array();
foreach ($items as $name => $fileinfo) {
if (isset($fileinfo['file']) && is_array($fileinfo['file']) && !empty($fileinfo['file'])) {
foreach ($fileinfo['file'] as $fn) {
if (!in_array(realpath($import_path . $fn), $filearray)) {
//if url, skip
if (preg_match('/^http[s]?\\:/', $fn) == 0) {
$filearray[] = realpath($import_path . $fn);
}
}
}
}
//validate the xml by its schema
if (preg_match('/imsqti\\_(.*)/', $fileinfo['type'])) {
$qti = new QTIParser($fileinfo['type']);
$xml_content = @file_get_contents($import_path . $fileinfo['href']);
$qti->parse($xml_content);
//will add error to $msg if failed
}
//add all dependent discussion tools to a list
if (isset($fileinfo['dependency']) && !empty($fileinfo['dependency'])) {
$avail_dt = array_merge($avail_dt, $fileinfo['dependency']);
}
}
//check if all files in the xml is presented in the archieve
$result = array_diff($filearray, $data);
//using sizeof because array_diff only
//returns an array containing all the entries from array1 that
//are not present in any of the
//other arrays.
//Using sizeof make sure it's not a subset of array2.
//-1 on data because it always contain the imsmanifest.xml file
if (!$skip_ims_validation) {
if (!empty($result) || sizeof($data) - 1 > sizeof($filearray)) {
$msg->addError(array('IMPORT_CARTRIDGE_FAILED', _AT('ims_missing_references')));
}
}
return true;
}
/**
* Validate all the XML in the package, including checking XSDs, missing data.
* @param string the path of the directory that contains all the package files
* @return boolean true if every file exists in the manifest, false if any is missing.
*/
function checkResources($import_path)
{
global $items, $msg, $skip_ims_validation;
if (!is_dir($import_path)) {
return;
}
//if the package has access for all content, skip validation for now.
//todo: import the XSD into our validator
if ($skip_ims_validation) {
return true;
}
//generate a file tree
$data = rscandir($import_path);
//check if every file is presented in the manifest
foreach ($data as $filepath) {
$filepath = substr($filepath, strlen($import_path));
//validate xml via its xsd/dtds
if (preg_match('/(.*)\\.xml/', $filepath)) {
$dom = new DOMDocument();
$dom->load(realpath($import_path . $filepath));
if (!@$dom->schemaValidate('main.xsd')) {
$msg->addError('MANIFEST_FAILED_VALIDATION - ' . $filepath);
}
//if this is the manifest file, we do not have to check for its existance.
if (preg_match('/(.*)imsmanifest\\.xml/', $filepath)) {
continue;
}
}
$flag = false;
$file_exists_in_manifest = false;
//check if every file in manifest indeed exists
foreach ($items as $name => $fileinfo) {
if (is_array($fileinfo['file'])) {
if (in_array($filepath, $fileinfo['file'])) {
$file_exists_in_manifest = true;
//validate the xml by its schema
if (preg_match('/imsqti\\_(.*)/', $fileinfo['type'])) {
$qti = new QTIParser($fileinfo['type']);
$xml_content = @file_get_contents($import_path . $fileinfo['href']);
$qti->parse($xml_content);
if ($msg->containsErrors()) {
$flag = false;
} else {
$flag = true;
}
} else {
$flag = true;
}
}
}
}
//check if all the files exists in the manifest, if not, throw error.
if (!$file_exists_in_manifest) {
$msg->addError('MANIFEST_NOT_WELLFORM: MISSING REFERENCES');
break;
}
if ($flag == false) {
//add an error message if it doesn't have any.
if (!$msg->containsErrors()) {
$msg->addError('MANIFEST_NOT_WELLFORM: MISSING REFERENCES');
}
return false;
}
}
return true;
}
