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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
21declare(strict_types=1);
22
23namespace oat\tao\model\Translation\Service;
24
25use core_kernel_classes_Resource;
26use InvalidArgumentException;
27use oat\oatbox\user\UserLanguageServiceInterface;
28
29class ResourceLanguageRetriever
30{
31    private UserLanguageServiceInterface $userLanguageService;
32
33    private array $retrievers = [];
34
35    public function __construct(UserLanguageServiceInterface $userLanguageService)
36    {
37        $this->userLanguageService = $userLanguageService;
38    }
39
40    public function setRetriever(string $resourceType, callable $retriever): void
41    {
42        if (array_key_exists($resourceType, $this->retrievers)) {
43            throw new InvalidArgumentException(sprintf('Retriever for resource type %s already set.', $resourceType));
44        }
45
46        $this->retrievers[$resourceType] = $retriever;
47    }
48
49    public function retrieve(core_kernel_classes_Resource $resource): string
50    {
51        $resourceType = $resource->getRootId();
52
53        $language = isset($this->retrievers[$resourceType])
54            ? $this->retrievers[$resourceType]($resource)
55            : null;
56
57        return $language ?? $this->userLanguageService->getDefaultLanguage();
58    }
59}