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<?php
namespace Kanboard\Core\Cache;
use Kanboard\Core\Tool;
use LogicException;
/**
* Class FileCache
*
* @package Kanboard\Core\Cache
*/
class FileCache extends BaseCache
{
/**
* Store an item in the cache
*
* @access public
* @param string $key
* @param string $value
*/
public function set($key, $value)
{
$this->createCacheFolder();
file_put_contents($this->getFilenameFromKey($key), serialize($value));
}
/**
* Retrieve an item from the cache by key
*
* @access public
* @param string $key
* @return mixed Null when not found, cached value otherwise
*/
public function get($key)
{
$filename = $this->getFilenameFromKey($key);
if (file_exists($filename)) {
return unserialize(file_get_contents($filename));
}
return null;
}
/**
* Remove all items from the cache
*
* @access public
*/
public function flush()
{
$this->createCacheFolder();
Tool::removeAllFiles(CACHE_DIR, false);
}
/**
* Remove an item from the cache
*
* @access public
* @param string $key
*/
public function remove($key)
{
$filename = $this->getFilenameFromKey($key);
if (file_exists($filename)) {
unlink($filename);
}
}
/**
* Get absolute filename from the key
*
* @access protected
* @param string $key
* @return string
*/
protected function getFilenameFromKey($key)
{
return CACHE_DIR.DIRECTORY_SEPARATOR.$key;
}
/**
* Create cache folder if missing
*
* @access protected
* @throws LogicException
*/
protected function createCacheFolder()
{
if (! is_dir(CACHE_DIR)) {
if (! mkdir(CACHE_DIR, 0755)) {
throw new LogicException('Unable to create cache directory: '.CACHE_DIR);
}
}
}
}
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