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302 lines
11 KiB
302 lines
11 KiB
<?php //$id:$
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/**
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* Container for the scormItem class that deals with <item> elements in an imsmanifest file
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* @package dokeos.learnpath
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* @author Yannick Warnier <ywarnier@beeznest.org>
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*/
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/**
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* This class handles the <item> elements from an imsmanifest file.
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*/
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require_once('learnpathItem.class.php');
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class scormItem extends learnpathItem{
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var $identifier = '';
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var $identifierref = '';
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var $isvisible = '';
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var $parameters = '';
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var $title = '';
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var $sub_items = array();
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var $metadata;
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//var $prerequisites = ''; - defined in learnpathItem.class.php
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var $maxtimeallowed = '00:00:00';
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var $timelimitaction = '';
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var $datafromims = '';
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var $masteryscore = '';
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var $scorm_contact;
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/**
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* Class constructor. Depending of the type of construction called ('db' or 'manifest'), will create a scormItem
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* object from database records or from the DOM element given as parameter
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* @param string Type of construction needed ('db' or 'manifest', default = 'manifest')
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* @param mixed Depending on the type given, DB id for the lp_item or reference to the DOM element
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*/
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function scormItem($type='manifest',&$element) {
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if(isset($element))
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{
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$v = substr(phpversion(),0,1);
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if($v == 4){
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switch($type){
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case 'db':
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parent::learnpathItem($element,api_get_user_id());
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$this->scorm_contact = false;
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//TODO implement this way of metadata object creation
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return false;
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case 'manifest': //do the same as the default
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default:
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//if($first_item->type == XML_ELEMENT_NODE) this is already check prior to the call to this function
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$children = $element->children();
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foreach($children as $a => $dummy)
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{
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$child =& $children[$a];
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switch($child->type)
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{
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case XML_ELEMENT_NODE:
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switch($child->tagname){
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case 'title':
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$tmp_children = $child->children();
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if(count($tmp_children)==1 and $tmp_children[0]->content!='' )
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{
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$this->title = $tmp_children[0]->content;
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}
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break;
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case 'maxtimeallowed':
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$tmp_children = $child->children();
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if(count($tmp_children)==1 and $tmp_children[0]->content!='' )
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{
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$this->maxtimeallowed = $tmp_children[0]->content;
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}
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break;
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case 'prerequisites':
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$tmp_children = $child->children();
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if(count($tmp_children)==1 and $tmp_children[0]->content!='' )
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{
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$this->prereq_string = $tmp_children[0]->content;
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}
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break;
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case 'timelimitaction':
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$tmp_children = $child->children();
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if(count($tmp_children)==1 and $tmp_children[0]->content!='' )
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{
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$this->timelimitaction = $tmp_children[0]->content;
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}
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break;
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case 'datafromims':
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$tmp_children = $child->children();
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if(count($tmp_children)==1 and $tmp_children[0]->content!='' )
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{
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$this->datafromims = $tmp_children[0]->content;
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}
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break;
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case 'masteryscore':
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$tmp_children = $child->children();
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if(count($tmp_children)==1 and $tmp_children[0]->content!='' )
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{
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$this->masteryscore = $tmp_children[0]->content;
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}
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break;
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case 'item':
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$oItem = new scormItem('manifest',$child);
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if($oItem->identifier != ''){
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$this->sub_items[$oItem->identifier] = $oItem;
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}
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break;
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case 'metadata':
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$this->metadata = new scormMetadata('manifest',$child);
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break;
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}
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break;
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case XML_TEXT_NODE:
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//this case is actually treated by looking into ELEMENT_NODEs above
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break;
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}
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}
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$attributes = $element->attributes();
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//$keep_href = '';
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foreach($attributes as $a1 => $dummy)
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{
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$attrib =& $attributes[$a1];
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switch($attrib->name){
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case 'identifier':
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$this->identifier = $attrib->value;
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break;
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case 'identifierref':
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$this->identifierref = $attrib->value;
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break;
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case 'isvisible':
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$this->isvisible = $attrib->value;
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break;
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case 'parameters':
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$this->parameters = $attrib->value;
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break;
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}
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}
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return true;
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}
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}elseif($v == 5){
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//parsing using PHP5 DOMXML methods
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switch($type){
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case 'db':
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parent::learnpathItem($element,api_get_user_id());
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$this->scorm_contact = false;
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//TODO implement this way of metadata object creation
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return false;
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case 'manifest': //do the same as the default
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default:
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//if($first_item->type == XML_ELEMENT_NODE) this is already check prior to the call to this function
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$children = $element->childNodes;
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foreach($children as $child)
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{
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switch($child->nodeType)
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{
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case XML_ELEMENT_NODE:
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switch($child->tagName){
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case 'title':
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$tmp_children = $child->childNodes;
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//if(count($tmp_children)==1 and $tmp_children[0]->textContent!='' )
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if($tmp_children->length==1 and $child->firstChild->nodeValue!='' )
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{
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$this->title = $child->firstChild->nodeValue;
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}
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break;
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case 'maxtimeallowed':
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case 'adlcp:maxtimeallowed':
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$tmp_children = $child->childNodes;
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//if(count($tmp_children)==1 and $tmp_children[0]->textContent!='' )
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if($tmp_children->length==1 and $child->firstChild->nodeValue!='' )
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{
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$this->maxtimeallowed = $child->firstChild->nodeValue;
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}
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break;
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case 'prerequisites':
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case 'adlcp:prerequisites':
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$tmp_children = $child->childNodes;
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//if(count($tmp_children)==1 and $tmp_children[0]->textContent!='' )
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if($tmp_children->length==1 and $child->firstChild->nodeValue!='' )
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{
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$this->prereq_string = $child->firstChild->nodeValue;
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}
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break;
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case 'timelimitaction':
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case 'adlcp:timelimitaction':
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$tmp_children = $child->childNodes;
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//if(count($tmp_children)==1 and $tmp_children[0]->textContent!='' )
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if($tmp_children->length==1 and $child->firstChild->nodeValue!='' )
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{
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$this->timelimitaction = $child->firstChild->nodeValue;
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}
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break;
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case 'datafromims':
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case 'adlcp:datafromims':
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$tmp_children = $child->childNodes;
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//if(count($tmp_children)==1 and $tmp_children[0]->textContent!='' )
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if($tmp_children->length==1 and $child->firstChild->nodeValue!='' )
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{
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$this->datafromims = $child->firstChild->nodeValue;
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}
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break;
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case 'masteryscore':
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case 'adlcp:masteryscore':
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$tmp_children = $child->childNodes;
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//if(count($tmp_children)==1 and $tmp_children[0]->textContent!='' )
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if($tmp_children->length==1 and $child->firstChild->nodeValue!='' )
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{
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$this->masteryscore = $child->firstChild->nodeValue;
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}
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break;
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case 'item':
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$oItem = new scormItem('manifest',$child);
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if($oItem->identifier != ''){
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$this->sub_items[$oItem->identifier] = $oItem;
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}
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break;
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case 'metadata':
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$this->metadata = new scormMetadata('manifest',$child);
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break;
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}
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break;
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case XML_TEXT_NODE:
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//this case is actually treated by looking into ELEMENT_NODEs above
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break;
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}
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}
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if($element->hasAttributes()){
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$attributes = $element->attributes;
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//$keep_href = '';
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foreach($attributes as $attrib)
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{
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switch($attrib->name){
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case 'identifier':
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$this->identifier = $attrib->value;
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break;
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case 'identifierref':
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$this->identifierref = $attrib->value;
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break;
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case 'isvisible':
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$this->isvisible = $attrib->value;
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break;
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case 'parameters':
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$this->parameters = $attrib->value;
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break;
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}
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}
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}
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return true;
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}
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}else{
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//cannot parse because not PHP4 nor PHP5... We should not even be here anyway...
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return false;
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}
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}
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return false;
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}
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/**
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* Builds a flat list with the current item and calls itself recursively on all children
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* @param array Reference to the array to complete with the current item
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* @param integer Optional absolute order (pointer) of the item in this learning path
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* @param integer Optional relative order of the item at this level
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* @param integer Optional level. If not given, assumes it's level 0
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*/
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function get_flat_list(&$list,&$abs_order,$rel_order=1,$level=0)
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{
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$list[] = array(
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'abs_order' => $abs_order,
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'datafromims' => $this->datafromims,
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'identifier' => $this->identifier,
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'identifierref' => $this->identifierref,
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'isvisible' => $this->isvisible,
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'level' => $level,
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'masteryscore' => $this->masteryscore,
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'maxtimeallowed' => $this->maxtimeallowed,
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'metadata' => $this->metadata,
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'parameters' => $this->parameters,
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'prerequisites' => (!empty($this->prereq_string)?$this->prereq_string:''),
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'rel_order' => $rel_order,
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'timelimitaction' => $this->timelimitaction,
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'title' => $this->title
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);
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$abs_order++;
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$i = 1;
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foreach($this->sub_items as $id => $dummy)
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{
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$oSubitem =& $this->sub_items[$id];
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$oSubitem->get_flat_list($list,$abs_order,$i,$level+1);
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$i++;
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}
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}
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/**
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* Save function. Uses the parent save function and adds a layer for SCORM.
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* @param boolean Save from URL params (1) or from object attributes (0)
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*/
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function save($from_outside=true)
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{
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parent::save($from_outside);
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//under certain conditions, the scorm_contact should not be set, because no scorm signal was sent
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$this->scorm_contact = true;
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if(!$this->scorm_contact){
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//error_log('New LP - was expecting SCORM message but none received',0);
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}
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}
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}
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?>
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