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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) 2024 (original work) Open Assessment Technologies SA; |
19 | */ |
20 | |
21 | declare(strict_types=1); |
22 | |
23 | namespace oat\taoQtiItem\helpers; |
24 | |
25 | use common_ext_ExtensionsManager as ExtensionsManager; |
26 | use DOMDocument; |
27 | use Exception; |
28 | use oat\taoQtiItem\model\qti\exception\QtiModelException; |
29 | |
30 | class QtiXmlLoader |
31 | { |
32 | private ExtensionsManager $extensionsManager; |
33 | |
34 | /** |
35 | * @param ExtensionsManager $extensionsManager |
36 | */ |
37 | public function __construct(ExtensionsManager $extensionsManager) |
38 | { |
39 | $this->extensionsManager = $extensionsManager; |
40 | } |
41 | |
42 | /** |
43 | * Load QTI xml and return DOMDocument instance. |
44 | * This is service implementation of oat\taoQtiItem\helpers\Authoring::loadQtiXml |
45 | * @throws QtiModelException |
46 | */ |
47 | public function load(string $xml): DOMDocument |
48 | { |
49 | $dom = new DOMDocument('1.0', 'UTF-8'); |
50 | $this->configDomParser($dom); |
51 | try { |
52 | $dom->loadXML($xml); |
53 | } catch (Exception $e) { |
54 | throw new QtiModelException('Invalid QTI XML', 0, $e); |
55 | } |
56 | |
57 | return $dom; |
58 | } |
59 | |
60 | private function getQtiParserConfig(): array |
61 | { |
62 | return $this->extensionsManager->getExtensionById('taoQtiItem') |
63 | ->getConfig('XMLParser'); |
64 | } |
65 | |
66 | private function configDomParser(DOMDocument $dom): void |
67 | { |
68 | $parserConfig = $this->getQtiParserConfig(); |
69 | if ($this->parserConfigValid($parserConfig)) { |
70 | $dom->formatOutput = $parserConfig['formatOutput']; |
71 | $dom->preserveWhiteSpace = $parserConfig['preserveWhiteSpace']; |
72 | $dom->validateOnParse = $parserConfig['validateOnParse']; |
73 | |
74 | return; |
75 | } |
76 | |
77 | $dom->formatOutput = true; |
78 | $dom->preserveWhiteSpace = false; |
79 | $dom->validateOnParse = false; |
80 | } |
81 | |
82 | private function parserConfigValid(array $parserConfig): bool |
83 | { |
84 | return !empty($parserConfig) && |
85 | isset($parserConfig['formatOutput'], $parserConfig['preserveWhiteSpace'], $parserConfig['validateOnParse']); |
86 | } |
87 | } |