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1 | <?php |
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2 | declare(strict_types=1); |
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3 | |||
4 | namespace Nexendrie\Translation\Resolvers; |
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5 | |||
6 | use Nexendrie\Translation\Loaders\ILoader, |
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7 | Nette\Http\IRequest, |
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8 | Nexendrie\Translation\LoaderNotSetException, |
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9 | Nette\Http\RequestFactory; |
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10 | |||
11 | /** |
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12 | * HeaderLocaleResolver |
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13 | * |
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14 | * @author Jakub Konečný |
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15 | */ |
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16 | 1 | class HeaderLocaleResolver implements ILoaderAwareLocaleResolver { |
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17 | 1 | use \Nette\SmartObject; |
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18 | |||
19 | /** @var ILoader|NULL */ |
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20 | protected $loader = NULL; |
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21 | /** @var IRequest */ |
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22 | protected $request; |
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23 | |||
24 | function __construct(IRequest $request = NULL) { |
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25 | 1 | if(is_null($request)) { |
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26 | 1 | $request = (new RequestFactory)->createHttpRequest(); |
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27 | } |
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28 | 1 | $this->request = $request; |
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29 | 1 | } |
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30 | |||
31 | function setLoader(ILoader $loader): void { |
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32 | 1 | $this->loader = $loader; |
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33 | 1 | } |
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34 | |||
35 | /** |
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36 | * Resolve language |
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37 | * |
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38 | * Taken from Nette\Http\Request::detectLanguage() |
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39 | * @author David Grudl |
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40 | */ |
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41 | function resolve(): ?string { |
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42 | 1 | if(is_null($this->loader)) { |
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43 | 1 | throw new LoaderNotSetException("Loader is not available, cannot detect possible languages."); |
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44 | } |
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45 | 1 | $header = $this->request->getHeader("Accept-Language"); |
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46 | 1 | $langs = $this->loader->getAvailableLanguages(); |
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47 | 1 | if(is_null($header)) { |
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48 | 1 | return NULL; |
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49 | } |
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50 | 1 | $s = strtolower($header); // case insensitive |
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51 | 1 | $s = strtr($s, '_', '-'); // cs_CZ means cs-CZ |
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52 | 1 | rsort($langs); // first more specific |
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53 | 1 | $pattern = ')(?:-[^\s,;=]+)?\s*(?:;\s*q=([0-9.]+))?#'; |
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54 | 1 | preg_match_all('#(' . implode('|', $langs) . $pattern, $s, $matches); |
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55 | 1 | if(!$matches[0]) { |
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56 | 1 | return NULL; |
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57 | } |
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58 | 1 | $max = 0; |
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59 | 1 | $lang = NULL; |
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60 | 1 | foreach($matches[1] as $key => $value) { |
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61 | 1 | $q = ($matches[2][$key] === '') ? 1.0 : (float) $matches[2][$key]; |
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62 | 1 | if($q > $max) { |
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63 | 1 | $max = $q; |
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64 | 1 | $lang = $value; |
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65 | } |
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66 | } |
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67 | 1 | return $lang; |
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68 | } |
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69 | } |
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70 | ?> |
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