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- <?php //$id:$
- /**
- * Container for the scormResource class
- * @package scorm.learnpath
- * @author Yannick Warnier <ywarnier@beeznest.org>
- */
- /**
- * Class defining the <resource> tag in an imsmanifest.xml file
- *
- */
- class scormResource {
- var $identifier = '';
- var $type = 'webcontent';
- //var $identifierref = '';
- var $scormtype = 'asset';
- var $base = '';
- var $href = '';
- var $metadata;
- //var $file_href;
- //var $file_metadata;
- var $files = array();
- var $dependencies = array();
-
- /**
- * Class constructor. Depending of the type of construction called ('db' or 'manifest'), will create a scormResource
- * object from database records or from the DOM element given as parameter
- * @param string Type of construction needed ('db' or 'manifest', default = 'manifest')
- * @param mixed Depending on the type given, DB id for the lp_item or reference to the DOM element
- */
- function scormResource($type='manifest',&$element) {
- /*
- echo "<pre>Analysing resource:<br />\n";
- var_dump($element);
- echo "</pre><br />\n";
- */
- if(isset($element))
- {
- $v = substr(phpversion(),0,1);
- if($v == 4){
- switch($type){
- case 'db':
- //TODO implement this way of metadata object creation
- return false;
- case 'manifest': //do the same as the default
- default:
- //if($first_item->type == XML_ELEMENT_NODE) this is already check prior to the call to this function
- $children = $element->children();
- foreach($children as $a => $dummy)
- {
- $child =& $children[$a];
- switch($child->type)
- {
- case XML_ELEMENT_NODE:
- switch($child->tagname){
- case 'file':
- //echo "Child is a file tag<br />\n";
- $this->files[] = $child->get_attribute('href');
- //var_dump($this->files);
- //ignoring file metadata
- //files[] array contains all <file href='x'> tags one by one
- break;
- case 'metadata':
- //echo "Child is a metadata tag<br />\n";
- $this->metadata = new scormMetadata('manifest',$child);
- break;
- case 'dependency':
- //echo "Child is a dependency tag<br />\n";
- //need to get identifierref attribute inside dependency node
- //dependencies[] array represents all <dependency identifierref='x'> tags united
- $this->dependencies[] = $child->get_attribute('identifierref');
- break;
- }
- break;
- }
- }
- $attributes = $element->attributes();
- //$keep_href = '';
- if(count($attributes)>0){ //in some cases we get here with an empty attributes array
- //TODO find when and why we get such a case (empty array)
- foreach($attributes as $a1 => $dummy)
- {
- $attrib =& $attributes[$a1];
- switch($attrib->name){
- case 'identifier':
- $this->identifier = $attrib->value;
- break;
- case 'type':
- if(!empty($attrib->value)){
- $this->type = $attrib->value;
- }
- break;
- case 'scormtype':
- if(!empty($attrib->value)){
- $this->scormtype = $attrib->value;
- }
- break;
- case 'base':
- $this->base = $attrib->value;
- break;
- case 'href':
- $this->href = $attrib->value;
- break;
- }
- }
- }
- return true;
-
- }
- }elseif($v == 5){
- //parsing using PHP5 DOMXML methods
- switch($type){
- case 'db':
- //TODO implement this way of metadata object creation
- return false;
- case 'manifest': //do the same as the default
- default:
- //if($first_item->type == XML_ELEMENT_NODE) this is already check prior to the call to this function
- $children = $element->childNodes;
- foreach($children as $child)
- {
- switch($child->nodeType)
- {
- case XML_ELEMENT_NODE:
- switch($child->tagName){
- case 'file':
- //echo "Child is a file tag<br />\n";
- $this->files[] = $child->getAttribute('href');
- break;
- case 'metadata':
- //echo "Child is a metadata tag<br />\n";
- $this->metadata = new scormMetadata('manifest',$child);
- break;
- case 'dependency':
- //need to get identifierref attribute inside dependency node
- //dependencies[] array represents all <dependency identifierref='x'> tags united
- $this->dependencies[] = $child->getAttribute('identifierref');
- break;
- }
- break;
- }
- }
- //$keep_href = '';
- if($element->hasAttributes()){ //in some cases we get here with an empty attributes array
- //TODO find when and why we get such a case (empty array)
- $attributes = $element->attributes;
- foreach($attributes as $attrib)
- {
- switch($attrib->name){
- case 'identifier':
- $this->identifier = $attrib->value;
- break;
- case 'type':
- if(!empty($attrib->value)){
- $this->type = $attrib->value;
- }
- break;
- case 'scormtype':
- if(!empty($attrib->value)){
- $this->scormtype = $attrib->value;
- }
- break;
- case 'base':
- $this->base = $attrib->value;
- break;
- case 'href':
- $this->href = $attrib->value;
- break;
- }
- }
- }
- return true;
-
- }
- }else{
- //cannot parse because not PHP4 nor PHP5... We should not even be here anyway...
- return false;
- }
- }
- return false;
- }
- /**
- * Path getter
- * @return string Path for this resource
- */
- function get_path()
- {
- if(!empty($this->href))
- {
- require_once('learnpath.class.php');
- return learnpath::escape_string($this->href);
- }else{
- return '';
- }
- }
- /**
- * Scorm type getter
- * @return string generally 'asset' or 'sco' as these are the only two values defined in SCORM 1.2
- */
- function get_scorm_type()
- {
- if(!empty($this->scormtype)){
- require_once('learnpath.class.php');
- return learnpath::escape_string($this->scormtype);
- }else{
- return '';
- }
- }
- }
- ?>
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