[7575] | 1 | <?php |
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| 2 | |
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| 3 | /* |
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| 4 | * This file is part of the Assetic package, an OpenSky project. |
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| 5 | * |
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| 6 | * (c) 2010-2012 OpenSky Project Inc |
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| 7 | * |
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| 8 | * For the full copyright and license information, please view the LICENSE |
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| 9 | * file that was distributed with this source code. |
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| 10 | */ |
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| 11 | |
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| 12 | namespace Assetic\Asset; |
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| 13 | |
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| 14 | use Assetic\Cache\CacheInterface; |
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| 15 | use Assetic\Filter\FilterInterface; |
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| 16 | use Assetic\Filter\HashableInterface; |
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| 17 | |
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| 18 | /** |
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| 19 | * Caches an asset to avoid the cost of loading and dumping. |
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| 20 | * |
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| 21 | * @author Kris Wallsmith <kris.wallsmith@gmail.com> |
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| 22 | */ |
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| 23 | class AssetCache implements AssetInterface |
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| 24 | { |
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| 25 | private $asset; |
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| 26 | private $cache; |
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| 27 | |
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| 28 | public function __construct(AssetInterface $asset, CacheInterface $cache) |
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| 29 | { |
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| 30 | $this->asset = $asset; |
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| 31 | $this->cache = $cache; |
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| 32 | } |
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| 33 | |
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| 34 | public function ensureFilter(FilterInterface $filter) |
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| 35 | { |
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| 36 | $this->asset->ensureFilter($filter); |
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| 37 | } |
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| 38 | |
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| 39 | public function getFilters() |
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| 40 | { |
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| 41 | return $this->asset->getFilters(); |
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| 42 | } |
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| 43 | |
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| 44 | public function clearFilters() |
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| 45 | { |
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| 46 | $this->asset->clearFilters(); |
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| 47 | } |
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| 48 | |
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| 49 | public function load(FilterInterface $additionalFilter = null) |
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| 50 | { |
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| 51 | $cacheKey = self::getCacheKey($this->asset, $additionalFilter, 'load'); |
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| 52 | if ($this->cache->has($cacheKey)) { |
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| 53 | $this->asset->setContent($this->cache->get($cacheKey)); |
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| 54 | |
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| 55 | return; |
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| 56 | } |
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| 57 | |
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| 58 | $this->asset->load($additionalFilter); |
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| 59 | $this->cache->set($cacheKey, $this->asset->getContent()); |
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| 60 | } |
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| 61 | |
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| 62 | public function dump(FilterInterface $additionalFilter = null) |
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| 63 | { |
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| 64 | $cacheKey = self::getCacheKey($this->asset, $additionalFilter, 'dump'); |
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| 65 | if ($this->cache->has($cacheKey)) { |
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| 66 | return $this->cache->get($cacheKey); |
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| 67 | } |
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| 68 | |
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| 69 | $content = $this->asset->dump($additionalFilter); |
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| 70 | $this->cache->set($cacheKey, $content); |
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| 71 | |
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| 72 | return $content; |
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| 73 | } |
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| 74 | |
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| 75 | public function getContent() |
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| 76 | { |
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| 77 | return $this->asset->getContent(); |
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| 78 | } |
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| 79 | |
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| 80 | public function setContent($content) |
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| 81 | { |
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| 82 | $this->asset->setContent($content); |
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| 83 | } |
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| 84 | |
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| 85 | public function getSourceRoot() |
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| 86 | { |
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| 87 | return $this->asset->getSourceRoot(); |
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| 88 | } |
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| 89 | |
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| 90 | public function getSourcePath() |
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| 91 | { |
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| 92 | return $this->asset->getSourcePath(); |
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| 93 | } |
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| 94 | |
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| 95 | public function getTargetPath() |
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| 96 | { |
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| 97 | return $this->asset->getTargetPath(); |
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| 98 | } |
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| 99 | |
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| 100 | public function setTargetPath($targetPath) |
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| 101 | { |
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| 102 | $this->asset->setTargetPath($targetPath); |
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| 103 | } |
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| 104 | |
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| 105 | public function getLastModified() |
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| 106 | { |
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| 107 | return $this->asset->getLastModified(); |
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| 108 | } |
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| 109 | |
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| 110 | public function getVars() |
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| 111 | { |
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| 112 | return $this->asset->getVars(); |
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| 113 | } |
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| 114 | |
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| 115 | public function setValues(array $values) |
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| 116 | { |
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| 117 | $this->asset->setValues($values); |
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| 118 | } |
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| 119 | |
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| 120 | public function getValues() |
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| 121 | { |
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| 122 | return $this->asset->getValues(); |
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| 123 | } |
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| 124 | |
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| 125 | /** |
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| 126 | * Returns a cache key for the current asset. |
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| 127 | * |
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| 128 | * The key is composed of everything but an asset's content: |
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| 129 | * |
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| 130 | * * source root |
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| 131 | * * source path |
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| 132 | * * target url |
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| 133 | * * last modified |
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| 134 | * * filters |
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| 135 | * |
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| 136 | * @param AssetInterface $asset The asset |
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| 137 | * @param FilterInterface $additionalFilter Any additional filter being applied |
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| 138 | * @param string $salt Salt for the key |
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| 139 | * |
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| 140 | * @return string A key for identifying the current asset |
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| 141 | */ |
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| 142 | private static function getCacheKey(AssetInterface $asset, FilterInterface $additionalFilter = null, $salt = '') |
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| 143 | { |
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| 144 | if ($additionalFilter) { |
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| 145 | $asset = clone $asset; |
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| 146 | $asset->ensureFilter($additionalFilter); |
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| 147 | } |
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| 148 | |
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| 149 | $cacheKey = $asset->getSourceRoot(); |
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| 150 | $cacheKey .= $asset->getSourcePath(); |
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| 151 | $cacheKey .= $asset->getTargetPath(); |
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| 152 | $cacheKey .= $asset->getLastModified(); |
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| 153 | |
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| 154 | foreach ($asset->getFilters() as $filter) { |
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| 155 | if ($filter instanceof HashableInterface) { |
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| 156 | $cacheKey .= $filter->hash(); |
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| 157 | } else { |
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| 158 | $cacheKey .= serialize($filter); |
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| 159 | } |
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| 160 | } |
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| 161 | |
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| 162 | if ($values = $asset->getValues()) { |
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| 163 | asort($values); |
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| 164 | $cacheKey .= serialize($values); |
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| 165 | } |
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| 166 | |
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| 167 | return md5($cacheKey.$salt); |
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| 168 | } |
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| 169 | } |
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