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<?php
/**
* This file is part of RSS-Bridge, a PHP project capable of generating RSS and
* Atom feeds for websites that don't have one.
*
* For the full license information, please view the UNLICENSE file distributed
* with this source code.
*
* @package Core
* @license http://unlicense.org/ UNLICENSE
* @link https://github.com/rss-bridge/rss-bridge
*/
/**
* The cache interface
*/
interface CacheInterface {
/**
* Set scope of the current cache
*
* If $scope is an empty string, the cache is set to a global context.
*
* @param string $scope The scope the data is related to
*/
public function setScope($scope);
/**
* Set key to assign the current data
*
* Since $key can be anything, the cache implementation must ensure to
* assign the related data reliably; most commonly by serializing and
* hashing the key in an appropriate way.
*
* @param array $key The key the data is related to
*/
public function setKey($key);
/**
* Loads data from cache
*
* @return mixed The cached data or null
*/
public function loadData();
/**
* Stores data to the cache
*
* @param mixed $data The data to store
* @return self The cache object
*/
public function saveData($data);
/**
* Returns the timestamp for the curent cache data
*
* @return int Timestamp or null
*/
public function getTime();
/**
* Removes any data that is older than the specified age from cache
*
* @param int $seconds The cache age in seconds
*/
public function purgeCache($seconds);
}
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