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134 lines
5.2 KiB
134 lines
5.2 KiB
<?php
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/* For licensing terms, see /license.txt */
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/**
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* Container for the scormResource class.
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*
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* @author Yannick Warnier <ywarnier@beeznest.org>
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*/
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/**
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* Class defining the <resource> tag in an imsmanifest.xml file.
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*/
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class scormResource
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{
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public $identifier = '';
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public $type = 'webcontent';
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//public $identifierref = '';
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public $scormtype = 'sco'; // Fix problems with ENI content where asset is not defined.
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public $base = '';
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public $href = '';
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public $metadata;
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//public $file_href;
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//public $file_metadata;
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public $files = [];
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public $dependencies = [];
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/**
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* Class constructor. Depending of the type of construction called ('db' or 'manifest'), will create a scormResource
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* object from database records or from the DOM element given as parameter.
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*
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* @param string Type of construction needed ('db' or 'manifest', default = 'manifest')
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* @param mixed Depending on the type given, DB id for the lp_item or reference to the DOM element
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*/
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public function __construct($type = 'manifest', &$element)
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{
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if (isset($element)) {
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// Parsing using PHP5 DOMXML methods.
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switch ($type) {
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case 'db':
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// TODO: Implement this way of metadata object creation.
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return false;
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case 'manifest': // Do the same as the default.
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default:
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//if ($first_item->type == XML_ELEMENT_NODE) this is already check prior to the call to this function.
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$children = $element->childNodes;
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if (is_array($children)) {
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foreach ($children as $child) {
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switch ($child->nodeType) {
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case XML_ELEMENT_NODE:
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switch ($child->tagName) {
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case 'file':
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//echo "Child is a file tag<br />\n";
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$this->files[] = $child->getAttribute('href');
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break;
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case 'metadata':
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//echo "Child is a metadata tag<br />\n";
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$this->metadata = new scormMetadata('manifest', $child);
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break;
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case 'dependency':
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// Need to get identifierref attribute inside dependency node.
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// dependencies[] array represents all <dependency identifierref='x'> tags united.
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$this->dependencies[] = $child->getAttribute('identifierref');
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break;
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}
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break;
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}
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}
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}
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//$keep_href = '';
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if ($element->hasAttributes()) { //in some cases we get here with an empty attributes array
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// TODO: Find when and why we get such a case (empty array).
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$attributes = $element->attributes;
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foreach ($attributes as $attrib) {
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switch ($attrib->name) {
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case 'identifier':
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$this->identifier = $attrib->value;
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break;
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case 'type':
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if (!empty($attrib->value)) {
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$this->type = $attrib->value;
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}
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break;
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case 'scormtype':
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if (!empty($attrib->value)) {
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$this->scormtype = $attrib->value;
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}
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break;
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case 'base':
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$this->base = $attrib->value;
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break;
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case 'href':
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$this->href = $attrib->value;
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break;
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}
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}
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}
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return true;
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}
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// End parsing using PHP5 DOMXML methods.
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}
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return false;
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}
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/**
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* Path getter.
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*
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* @return string Path for this resource
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*/
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public function get_path()
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{
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if (!empty($this->href)) {
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return Database::escape_string($this->href);
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} else {
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return '';
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}
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}
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/**
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* Scorm type getter.
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*
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* @return string generally 'asset' or 'sco' as these are the only two values defined in SCORM 1.2
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*/
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public function get_scorm_type()
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{
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if (!empty($this->scormtype)) {
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return Database::escape_string($this->scormtype);
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} else {
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return '';
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}
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}
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}
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