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<?php namespace Illuminate\Cache;
use Illuminate\Filesystem\Filesystem;
class FileStore implements StoreInterface {
/**
* The Illuminate Filesystem instance.
*
* @var \Illuminate\Filesystem\Filesystem
*/
protected $files;
/**
* The file cache directory
*
* @var string
*/
protected $directory;
/**
* Create a new file cache store instance.
*
* @param \Illuminate\Filesystem\Filesystem $files
* @param string $directory
* @return void
*/
public function __construct(Filesystem $files, $directory)
{
$this->files = $files;
$this->directory = $directory;
}
/**
* Retrieve an item from the cache by key.
*
* @param string $key
* @return mixed
*/
public function get($key)
{
$path = $this->path($key);
// If the file doesn't exists, we obviously can't return the cache so we will
// just return null. Otherwise, we'll get the contents of the file and get
// the expiration UNIX timestamps from the start of the file's contents.
if ( ! $this->files->exists($path))
{
return null;
}
try
{
$expire = substr($contents = $this->files->get($path), 0, 10);
}
catch (\Exception $e)
{
return null;
}
// If the current time is greater than expiration timestamps we will delete
// the file and return null. This helps clean up the old files and keeps
// this directory much cleaner for us as old files aren't hanging out.
if (time() >= $expire)
{
return $this->forget($key);
}
return unserialize(substr($contents, 10));
}
/**
* Store an item in the cache for a given number of minutes.
*
* @param string $key
* @param mixed $value
* @param int $minutes
* @return void
*/
public function put($key, $value, $minutes)
{
$value = $this->expiration($minutes).serialize($value);
$this->createCacheDirectory($path = $this->path($key));
$this->files->put($path, $value);
}
/**
* Create the file cache directory if necessary.
*
* @param string $path
* @return void
*/
protected function createCacheDirectory($path)
{
try
{
$this->files->makeDirectory(dirname($path), 0777, true, true);
}
catch (\Exception $e)
{
//
}
}
/**
* Increment the value of an item in the cache.
*
* @param string $key
* @param mixed $value
* @return void
*
* @throws \LogicException
*/
public function increment($key, $value = 1)
{
throw new \LogicException("Increment operations not supported by this driver.");
}
/**
* Decrement the value of an item in the cache.
*
* @param string $key
* @param mixed $value
* @return void
*
* @throws \LogicException
*/
public function decrement($key, $value = 1)
{
throw new \LogicException("Decrement operations not supported by this driver.");
}
/**
* Store an item in the cache indefinitely.
*
* @param string $key
* @param mixed $value
* @return void
*/
public function forever($key, $value)
{
return $this->put($key, $value, 0);
}
/**
* Remove an item from the cache.
*
* @param string $key
* @return void
*/
public function forget($key)
{
$file = $this->path($key);
if ($this->files->exists($file))
{
$this->files->delete($file);
}
}
/**
* Remove all items from the cache.
*
* @return void
*/
public function flush()
{
foreach ($this->files->directories($this->directory) as $directory)
{
$this->files->deleteDirectory($directory);
}
}
/**
* Get the full path for the given cache key.
*
* @param string $key
* @return string
*/
protected function path($key)
{
$parts = array_slice(str_split($hash = md5($key), 2), 0, 2);
return $this->directory.'/'.join('/', $parts).'/'.$hash;
}
/**
* Get the expiration time based on the given minutes.
*
* @param int $minutes
* @return int
*/
protected function expiration($minutes)
{
if ($minutes === 0) return 9999999999;
return time() + ($minutes * 60);
}
/**
* Get the Filesystem instance.
*
* @return \Illuminate\Filesystem\Filesystem
*/
public function getFilesystem()
{
return $this->files;
}
/**
* Get the working directory of the cache.
*
* @return string
*/
public function getDirectory()
{
return $this->directory;
}
/**
* Get the cache key prefix.
*
* @return string
*/
public function getPrefix()
{
return '';
}
}
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