103 lines
3.2 KiB
PHP
103 lines
3.2 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) 2014-2021 (original work) Open Assessment Technologies SA (under the project TAO-PRODUCT);
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*
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*/
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namespace oat\taoQtiItem\model\search;
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use core_kernel_classes_Resource;
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use oat\generis\model\fileReference\FileReferenceSerializer;
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use oat\generis\model\OntologyAwareTrait;
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use oat\oatbox\service\ConfigurableService;
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use oat\tao\model\search\tokenizer\ResourceTokenizer;
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use oat\taoQtiItem\model\qti\Service;
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use oat\taoQtiItem\model\search\Tokenizer\Filter\TokenFilterInterface;
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use taoItems_models_classes_ItemsService;
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class QtiItemContentTokenizer extends ConfigurableService implements ResourceTokenizer
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{
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use OntologyAwareTrait;
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public const SERVICE_ID = 'taoQtiItem/QtiItemContentTokenizer';
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public const OPTION_FILTERS = 'data_filters';
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/**
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* Get tokens as string[] extracted from a QTI file
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* XML inside qti.xml is parsed and all text is tokenized
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*
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* @return array
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*/
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public function getStrings(core_kernel_classes_Resource $resource)
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{
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try {
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$ontologyFiles = $resource->getPropertyValues(
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$this->getProperty(taoItems_models_classes_ItemsService::PROPERTY_ITEM_CONTENT)
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);
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if (empty($ontologyFiles)) {
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return [];
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}
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} catch (\core_kernel_classes_EmptyProperty $e) {
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return [];
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}
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$file = $this->getFileReferenceSerializer()
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->unserializeDirectory(reset($ontologyFiles))
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->getFile(Service::QTI_ITEM_FILE);
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if (!$file->exists()) {
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return [];
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}
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$content = $file->read();
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if (empty($content)) {
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return [];
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}
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$dom = new \DOMDocument();
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$dom->loadXML($content);
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$xpath = new \DOMXPath($dom);
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$textNodes = $xpath->query('//text()');
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unset($xpath);
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$contentStrings = [];
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foreach ($textNodes as $textNode) {
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if ($this->applyFilters($textNode->wholeText)) {
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$contentStrings[] = trim($textNode->wholeText);
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}
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}
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return $contentStrings;
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}
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protected function getFileReferenceSerializer(): FileReferenceSerializer
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{
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return $this->getServiceManager()->get(FileReferenceSerializer::SERVICE_ID);
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}
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protected function applyFilters(string $data): string
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{
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/** @var TokenFilterInterface $filter */
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foreach ($this->getOption(self::OPTION_FILTERS, []) as $filter) {
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$output = $filter->filter($output ?? $data);
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}
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return $output ?? $data;
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}
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}
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