99 lines
3.5 KiB
PHP
99 lines
3.5 KiB
PHP
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<?php
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/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; under version 2
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* of the License (non-upgradable).
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright (c) 2013 (original work) Open Assessment Technologies SA (under the project TAO-PRODUCT);
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*
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*
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*/
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namespace oat\taoQtiItem\model\qti;
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use oat\taoQtiItem\model\qti\exception\ParsingException;
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use \SimpleXMLElement;
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/**
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* The ParserFactory provides some methods to build the QTI_Data objects from an
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* element.
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* SimpleXML is used as source to build the model.
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*
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* @access public
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* @author Joel Bout, <joel.bout@tudor.lu>
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* @package taoQTI
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*/
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class ManifestParserFactory
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{
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/**
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* Enables you to build the QTI_Resources from a manifest xml data node
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* Content Packaging 1.1)
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*
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* @access public
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* @author Joel Bout, <joel.bout@tudor.lu>
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* @param SimpleXMLElement source
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* @return array
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* @see http://www.imsglobal.org/question/qti_v2p0/imsqti_intgv2p0.html#section10003
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*/
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public static function getResourcesFromManifest(SimpleXMLElement $source)
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{
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$returnValue = [];
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//check of the root tag
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if ($source->getName() != 'manifest') {
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throw new ParsingException("incorrect manifest root tag");
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}
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$resourceNodes = $source->xpath("//*[name(.)='resource']");
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foreach ($resourceNodes as $resourceNode) {
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$type = (string) $resourceNode['type'];
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if (Resource::isAssessmentItem($type)) {
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$id = (string) $resourceNode['identifier'];
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$href = (isset($resourceNode['href'])) ? (string) $resourceNode['href'] : '';
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$auxFiles = [];
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//parse for auxiliary files
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foreach ($resourceNode->file as $fileNode) {
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$fileHref = (string) $fileNode['href'];
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if ($href != $fileHref) {
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$auxFiles[] = $fileHref;
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}
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}
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//include dependency files in item
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foreach ($resourceNode->dependency as $dependencyNode) {
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$ref = (string) $dependencyNode['identifierref'];
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//find referenced files within the current manifest:
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$refResourceNodes = $source->xpath("//*[name(.)='resource' and @identifier='" . $ref . "']");
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foreach ($refResourceNodes as $refResourceNode) {
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if (isset($refResourceNode['href'])) {
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$auxFiles[] = (string) $refResourceNode['href'];
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}
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}
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}
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$resource = new Resource($id, $type, $href);
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$resource->setAuxiliaryFiles($auxFiles);
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$returnValue[] = $resource;
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}
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}
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return (array) $returnValue;
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}
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}
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