1 | <?php |
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2 | |||
3 | namespace SilverStripe\TextExtraction\Cache\FileTextCache; |
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4 | |||
5 | use Psr\SimpleCache\CacheInterface; |
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6 | use SilverStripe\Assets\File; |
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7 | use SilverStripe\Core\Config\Configurable; |
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8 | use SilverStripe\Core\Flushable; |
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9 | use SilverStripe\Core\Injector\Injector; |
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10 | use SilverStripe\TextExtraction\Cache\FileTextCache; |
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11 | |||
12 | /** |
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13 | * Uses SS_Cache with a lifetime to cache extracted content |
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14 | */ |
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15 | class Cache implements FileTextCache, Flushable |
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16 | { |
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17 | use Configurable; |
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18 | |||
19 | /** |
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20 | * Lifetime of cache in seconds |
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21 | * Null is indefinite |
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22 | * |
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23 | * @var int|null |
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24 | * @config |
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25 | */ |
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26 | private static $lifetime = null; |
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27 | |||
28 | /** |
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29 | * @return CacheInterface |
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30 | */ |
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31 | protected static function get_cache() |
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32 | { |
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33 | $for = sprintf('%s.%s', CacheInterface::class, 'FileTextCache_Cache'); |
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34 | |||
35 | return Injector::inst()->get($for); |
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36 | } |
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37 | |||
38 | /** |
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39 | * |
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40 | * @param File $file |
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41 | * @return string |
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42 | */ |
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43 | protected function getKey(File $file) |
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44 | { |
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45 | return md5($file->getFilename()); |
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46 | } |
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47 | |||
48 | /** |
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49 | * |
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50 | * @param File $file |
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51 | * @return mixed |
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52 | */ |
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53 | public function load(File $file) |
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54 | { |
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55 | $key = $this->getKey($file); |
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56 | $cache = self::get_cache(); |
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57 | |||
58 | return $cache->get($key); |
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59 | } |
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60 | |||
61 | /** |
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62 | * @param File $file |
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63 | * @param string $content |
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64 | * @return string |
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65 | */ |
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66 | public function save(File $file, $content) |
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67 | { |
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68 | $lifetime = $this->config()->get('lifetime') ?: 3600; |
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69 | $key = $this->getKey($file); |
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70 | $cache = self::get_cache(); |
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71 | |||
72 | return $cache->set($key, $content, $lifetime); |
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73 | } |
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74 | |||
75 | /** |
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76 | * @return void |
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77 | */ |
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78 | public static function flush() |
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79 | { |
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80 | $cache = self::get_cache(); |
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81 | $cache->clear(); |
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82 | } |
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83 | |||
84 | /** |
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85 | * Alias for $this->flush() |
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86 | * |
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87 | * @return void |
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88 | */ |
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89 | public static function clear() |
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90 | { |
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91 | $cache = self::get_cache(); |
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92 | $cache->clear(); |
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93 | } |
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94 | |||
95 | /** |
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96 | * |
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97 | * @param File $file |
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98 | * @return bool |
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99 | */ |
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100 | public function invalidate(File $file) |
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101 | { |
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102 | $key = $this->getKey($file); |
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103 | $cache = self::get_cache(); |
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104 | |||
105 | return $cache->delete($key); |
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106 | } |
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107 | } |
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108 |