|
1 <?php |
|
2 |
|
3 /* |
|
4 * This file is part of the Assetic package, an OpenSky project. |
|
5 * |
|
6 * (c) 2010-2011 OpenSky Project Inc |
|
7 * |
|
8 * For the full copyright and license information, please view the LICENSE |
|
9 * file that was distributed with this source code. |
|
10 */ |
|
11 |
|
12 namespace Assetic\Cache; |
|
13 |
|
14 /** |
|
15 * A config cache stores values using var_export() and include. |
|
16 * |
|
17 * @author Kris Wallsmith <kris.wallsmith@gmail.com> |
|
18 */ |
|
19 class ConfigCache |
|
20 { |
|
21 private $dir; |
|
22 |
|
23 /** |
|
24 * Construct. |
|
25 * |
|
26 * @param string $dir The cache directory |
|
27 */ |
|
28 public function __construct($dir) |
|
29 { |
|
30 $this->dir = $dir; |
|
31 } |
|
32 |
|
33 /** |
|
34 * Checks of the cache has a file. |
|
35 * |
|
36 * @param string $resource A cache key |
|
37 * |
|
38 * @return Boolean True if a file exists |
|
39 */ |
|
40 public function has($resource) |
|
41 { |
|
42 return file_exists($this->getSourcePath($resource)); |
|
43 } |
|
44 |
|
45 /** |
|
46 * Writes a value to a file. |
|
47 * |
|
48 * @param string $resource A cache key |
|
49 * @param mixed $value A value to cache |
|
50 */ |
|
51 public function set($resource, $value) |
|
52 { |
|
53 $path = $this->getSourcePath($resource); |
|
54 |
|
55 if (!is_dir($dir = dirname($path)) && false === @mkdir($dir, 0777, true)) { |
|
56 // @codeCoverageIgnoreStart |
|
57 throw new \RuntimeException('Unable to create directory '.$dir); |
|
58 // @codeCoverageIgnoreEnd |
|
59 } |
|
60 |
|
61 if (false === @file_put_contents($path, sprintf("<?php\n\n// $resource\nreturn %s;\n", var_export($value, true)))) { |
|
62 // @codeCoverageIgnoreStart |
|
63 throw new \RuntimeException('Unable to write file '.$path); |
|
64 // @codeCoverageIgnoreEnd |
|
65 } |
|
66 } |
|
67 |
|
68 /** |
|
69 * Loads and returns the value for the supplied cache key. |
|
70 * |
|
71 * @param string $resource A cache key |
|
72 * |
|
73 * @return mixed The cached value |
|
74 */ |
|
75 public function get($resource) |
|
76 { |
|
77 $path = $this->getSourcePath($resource); |
|
78 |
|
79 if (!file_exists($path)) { |
|
80 throw new \RuntimeException('There is no cached value for '.$resource); |
|
81 } |
|
82 |
|
83 return include $path; |
|
84 } |
|
85 |
|
86 /** |
|
87 * Returns a timestamp for when the cache was created. |
|
88 * |
|
89 * @param string $resource A cache key |
|
90 * |
|
91 * @return integer A UNIX timestamp |
|
92 */ |
|
93 public function getTimestamp($resource) |
|
94 { |
|
95 $path = $this->getSourcePath($resource); |
|
96 |
|
97 if (!file_exists($path)) { |
|
98 throw new \RuntimeException('There is no cached value for '.$resource); |
|
99 } |
|
100 |
|
101 if (false === $mtime = @filemtime($path)) { |
|
102 // @codeCoverageIgnoreStart |
|
103 throw new \RuntimeException('Unable to determine file mtime for '.$path); |
|
104 // @codeCoverageIgnoreEnd |
|
105 } |
|
106 |
|
107 return $mtime; |
|
108 } |
|
109 |
|
110 /** |
|
111 * Returns the path where the file corresponding to the supplied cache key can be included from. |
|
112 * |
|
113 * @param string $resource A cache key |
|
114 * |
|
115 * @return string A file path |
|
116 */ |
|
117 private function getSourcePath($resource) |
|
118 { |
|
119 $key = md5($resource); |
|
120 |
|
121 return $this->dir.'/'.$key[0].'/'.$key.'.php'; |
|
122 } |
|
123 } |