include/lib.static_cache.php

   1 <?php
   2
   3 namespace Garradin;
   4
   5 class Static_Cache
   6 {
   7         const EXPIRE = 3600; // 1h
   8         const CLEAN_EXPIRE = 86400; // 1 day
   9
  10         protected static function _getCacheDir()
  11         {
  12                 return DATA_ROOT . '/cache/static';
  13         }
  14
  15         protected static function _getCachePath($id)
  16         {
  17                 $id = 'cache_' . sha1($id);
  18                 return self::_getCacheDir() . '/' . $id;
  19         }
  20
  21         static public function store($id, $content)
  22         {
  23                 $path = self::_getCachePath($id);
  24                 return (bool) file_put_contents($path, $content);
  25         }
  26
  27         static public function expired($id, $expire = self::EXPIRE)
  28         {
  29                 $path = self::_getCachePath($id);
  30                 $time = @filemtime($path);
  31
  32                 if (!$time)
  33                 {
  34                         return true;
  35                 }
  36
  37                 return ($time > (time() - (int)$expire)) ? false : true;
  38         }
  39
  40         static public function get($id)
  41         {
  42                 $path = self::_getCachePath($id);
  43                 return file_get_contents($path);
  44         }
  45
  46         static public function display($id)
  47         {
  48                 $path = self::_getCachePath($id);
  49                 return readfile($path);
  50         }
  51
  52         static public function getPath($id)
  53         {
  54                 return self::_getCachePath($id);
  55         }
  56
  57         static public function remove($id)
  58         {
  59                 $path = self::_getCachePath($id);
  60                 return unlink($path);
  61         }
  62
  63         static public function clean($expire = self::CLEAN_EXPIRE)
  64         {
  65                 $dir = self::_getCacheDir();
  66                 $d = dir($dir);
  67
  68                 $expire = time() - $expire;
  69
  70                 while ($file = $d->read())
  71                 {
  72                         if ($file[0] == '.')
  73                         {
  74                                 continue;
  75                         }
  76
  77                         if (filemtime($dir . '/' . $file) > $expire)
  78                         {
  79                                 unlink($dir . '/' . $file);
  80                         }
  81                 }
  82
  83                 $d->close();
  84
  85                 return true;
  86         }
  87 }