145 lines
4.7 KiB
PHP
145 lines
4.7 KiB
PHP
<?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) 2013-2014 (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\oatbox\service\ServiceManager;
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use oat\taoQtiItem\model\ValidationService;
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use \tao_models_classes_Parser;
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use \tao_helpers_Request;
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use oat\oatbox\log\LoggerAwareTrait;
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/**
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* Enables you to parse and validate an imsmanifest.xml file.
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* You can load a list QTI_Resources from the parsed file.
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*
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* @access public
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* @author Jerome Bogaerts <jerome@taotesting.com>
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* @author Joel Bout <joel@taotesting.com>
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* @author Somsack Sipasseuth <sam@taotesting.com>
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* @package taoQTI
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* @see http://www.imsglobal.org/question/qti_v2p0/imsqti_intgv2p0.html#section10003
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*/
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class ManifestParser extends tao_models_classes_Parser
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{
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use LoggerAwareTrait;
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/**
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* Validate the manifest against an XML Schema Definition.
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*
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* @access public
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* @param string schema
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* @return boolean
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*/
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public function validate($schema = '')
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{
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if (empty($schema)) {
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// Let's detect NS in use...
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$dom = new \DOMDocument('1.0', 'UTF-8');
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switch ($this->sourceType) {
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case self::SOURCE_FILE:
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$dom->load($this->source);
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break;
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case self::SOURCE_URL:
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$xmlContent = tao_helpers_Request::load($this->source, true);
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$dom->loadXML($xmlContent);
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break;
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case self::SOURCE_STRING:
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$dom->loadXML($this->source);
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break;
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}
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// Retrieve Root's namespace.
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if ($dom->documentElement == null) {
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$this->addError('dom is null and could not be validate');
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$returnValue = false;
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} else {
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$ns = $dom->documentElement->lookupNamespaceUri(null);
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$servicemanager = $this->getServiceManager();
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$validationService = $servicemanager->get(ValidationService::SERVICE_ID);
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$schemas = $validationService->getManifestValidationSchema($ns);
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$validSchema = $this->validateMultiple($schemas);
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$returnValue = $validSchema !== '';
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}
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} elseif (!file_exists($schema)) {
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throw new \common_Exception('no schema found in the location ' . $schema);
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} else {
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$this->logDebug("The following schema will be used to validate imsmanifest.xml: '" . $schema . "'.");
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$returnValue = parent::validate($schema);
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}
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return (bool) $returnValue;
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}
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/**
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* Extract the resources informations about the items
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* and build a list a QTI_Resource
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*
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* @access public
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* @return array
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*/
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public function load()
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{
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$returnValue = [];
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//load it using the SimpleXml library
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$xml = false;
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switch ($this->sourceType) {
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case self::SOURCE_FILE:
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$xml = simplexml_load_file($this->source);
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break;
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case self::SOURCE_URL:
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$xmlContent = tao_helpers_Request::load($this->source, true);
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$xml = simplexml_load_string($xmlContent);
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break;
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case self::SOURCE_STRING:
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$xml = simplexml_load_string($this->source);
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break;
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}
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if ($xml !== false) {
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//get the QTI Item's resources from the imsmanifest.xml
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$returnValue = ManifestParserFactory::getResourcesFromManifest($xml);
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if (!$this->valid) {
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$this->valid = true;
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libxml_clear_errors();
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}
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} elseif (!$this->valid) {
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$this->addErrors(libxml_get_errors());
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libxml_clear_errors();
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}
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return (array) $returnValue;
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}
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protected function getServiceManager()
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{
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return ServiceManager::getServiceManager();
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}
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}
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