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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; under version 2 |
| 7 | * of the License (non-upgradable). |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 17 | * |
| 18 | * Copyright (c) 2013 (original work) Open Assessment Technologies SA (under the project TAO-PRODUCT); |
| 19 | * |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | use qtism\common\ResolutionException; |
| 24 | use qtism\common\Resolver; |
| 25 | use oat\taoQtiItem\model\qti\Service; |
| 26 | use oat\generis\model\OntologyAwareTrait; |
| 27 | |
| 28 | /** |
| 29 | * The ItemResolver class implements the logic to resolve TAO Item URIs to |
| 30 | * paths to the related QTI-XML files. |
| 31 | * |
| 32 | * @author Jérôme Bogaerts <jerome@taotesting.com> |
| 33 | * |
| 34 | */ |
| 35 | class taoQtiTest_helpers_ItemResolver implements Resolver |
| 36 | { |
| 37 | use OntologyAwareTrait; |
| 38 | |
| 39 | /** |
| 40 | * @var Service |
| 41 | */ |
| 42 | private $service; |
| 43 | |
| 44 | /** @var string[] */ |
| 45 | private $tmpFiles = []; |
| 46 | |
| 47 | public function __construct(Service $itemService) |
| 48 | { |
| 49 | $this->service = $itemService; |
| 50 | } |
| 51 | |
| 52 | /** |
| 53 | * Resolve the given TAO Item URI in the path to |
| 54 | * the related QTI-XML file. |
| 55 | * |
| 56 | * @param string $url The URI of the TAO Item to resolve. |
| 57 | * @return string The path to the related QTI-XML file. |
| 58 | * @throws ResolutionException If an error occurs during the resolution of $url. |
| 59 | */ |
| 60 | public function resolve($url) |
| 61 | { |
| 62 | $taoItem = new core_kernel_classes_Resource($url); |
| 63 | if ($taoItem->exists() === false) { |
| 64 | $msg = __("The QTI Item with URI '%s' cannot be found.", $url); |
| 65 | throw new ResolutionException($msg); |
| 66 | } |
| 67 | |
| 68 | // The item is retrieved from the database. |
| 69 | // We can try to reach the QTI-XML file by detecting |
| 70 | // where it is supposed to be located. |
| 71 | |
| 72 | // strip xinclude, we don't need that at the moment. |
| 73 | $raw = $this->service->getXmlByRdfItem($this->getResource($url)); |
| 74 | $dom = new DOMDocument(); |
| 75 | $dom->loadXML($raw); |
| 76 | foreach ($dom->getElementsByTagNameNS('http://www.w3.org/2001/XInclude', 'include') as $element) { |
| 77 | $element->parentNode->removeChild($element); |
| 78 | } |
| 79 | |
| 80 | $tmpfile = sys_get_temp_dir() . '/' . md5($url) . '.xml'; |
| 81 | file_put_contents($tmpfile, $dom->saveXML()); |
| 82 | |
| 83 | $this->tmpFiles[] = $tmpfile; |
| 84 | |
| 85 | return $tmpfile; |
| 86 | } |
| 87 | |
| 88 | public function __destruct() |
| 89 | { |
| 90 | foreach ($this->tmpFiles as $tmpFile) { |
| 91 | if (is_writable($tmpFile)) { |
| 92 | unlink($tmpFile); |
| 93 | } |
| 94 | } |
| 95 | } |
| 96 | } |