[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\Cache; |
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| 13 | |
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| 14 | /** |
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| 15 | * A config cache stores values using var_export() and include. |
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| 16 | * |
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| 17 | * @author Kris Wallsmith <kris.wallsmith@gmail.com> |
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| 18 | */ |
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| 19 | class ConfigCache |
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| 20 | { |
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| 21 | private $dir; |
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| 22 | |
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| 23 | /** |
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| 24 | * Construct. |
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| 25 | * |
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| 26 | * @param string $dir The cache directory |
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| 27 | */ |
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| 28 | public function __construct($dir) |
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| 29 | { |
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| 30 | $this->dir = $dir; |
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| 31 | } |
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| 32 | |
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| 33 | /** |
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| 34 | * Checks of the cache has a file. |
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| 35 | * |
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| 36 | * @param string $resource A cache key |
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| 37 | * |
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| 38 | * @return Boolean True if a file exists |
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| 39 | */ |
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| 40 | public function has($resource) |
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| 41 | { |
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| 42 | return file_exists($this->getSourcePath($resource)); |
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| 43 | } |
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| 44 | |
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| 45 | /** |
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| 46 | * Writes a value to a file. |
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| 47 | * |
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| 48 | * @param string $resource A cache key |
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| 49 | * @param mixed $value A value to cache |
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| 50 | */ |
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| 51 | public function set($resource, $value) |
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| 52 | { |
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| 53 | $path = $this->getSourcePath($resource); |
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| 54 | |
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| 55 | if (!is_dir($dir = dirname($path)) && false === @mkdir($dir, 0777, true)) { |
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| 56 | // @codeCoverageIgnoreStart |
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| 57 | throw new \RuntimeException('Unable to create directory '.$dir); |
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| 58 | // @codeCoverageIgnoreEnd |
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| 59 | } |
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| 60 | |
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| 61 | if (false === @file_put_contents($path, sprintf("<?php\n\n// $resource\nreturn %s;\n", var_export($value, true)))) { |
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| 62 | // @codeCoverageIgnoreStart |
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| 63 | throw new \RuntimeException('Unable to write file '.$path); |
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| 64 | // @codeCoverageIgnoreEnd |
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| 65 | } |
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| 66 | } |
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| 67 | |
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| 68 | /** |
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| 69 | * Loads and returns the value for the supplied cache key. |
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| 70 | * |
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| 71 | * @param string $resource A cache key |
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| 72 | * |
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| 73 | * @return mixed The cached value |
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| 74 | */ |
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| 75 | public function get($resource) |
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| 76 | { |
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| 77 | $path = $this->getSourcePath($resource); |
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| 78 | |
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| 79 | if (!file_exists($path)) { |
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| 80 | throw new \RuntimeException('There is no cached value for '.$resource); |
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| 81 | } |
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| 82 | |
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| 83 | return include $path; |
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| 84 | } |
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| 85 | |
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| 86 | /** |
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| 87 | * Returns a timestamp for when the cache was created. |
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| 88 | * |
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| 89 | * @param string $resource A cache key |
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| 90 | * |
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| 91 | * @return integer A UNIX timestamp |
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| 92 | */ |
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| 93 | public function getTimestamp($resource) |
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| 94 | { |
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| 95 | $path = $this->getSourcePath($resource); |
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| 96 | |
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| 97 | if (!file_exists($path)) { |
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| 98 | throw new \RuntimeException('There is no cached value for '.$resource); |
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| 99 | } |
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| 100 | |
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| 101 | if (false === $mtime = @filemtime($path)) { |
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| 102 | // @codeCoverageIgnoreStart |
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| 103 | throw new \RuntimeException('Unable to determine file mtime for '.$path); |
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| 104 | // @codeCoverageIgnoreEnd |
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| 105 | } |
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| 106 | |
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| 107 | return $mtime; |
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| 108 | } |
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| 109 | |
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| 110 | /** |
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| 111 | * Returns the path where the file corresponding to the supplied cache key can be included from. |
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| 112 | * |
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| 113 | * @param string $resource A cache key |
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| 114 | * |
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| 115 | * @return string A file path |
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| 116 | */ |
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| 117 | private function getSourcePath($resource) |
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| 118 | { |
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| 119 | $key = md5($resource); |
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| 120 | |
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| 121 | return $this->dir.'/'.$key[0].'/'.$key.'.php'; |
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| 122 | } |
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| 123 | } |
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