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<?php
/**
 * Copyright (c) 2013 Thomas Tanghus (thomas@tanghus.net)
 * This file is licensed under the Affero General Public License version 3 or
 * later.
 * See the COPYING-README file.
 */
namespace OC\Cache;

/**
 * This interface defines method for accessing the file based user cache.
 */
class UserCache implements \OCP\ICache {

	/**
	 * @var \OC\Cache\File $userCache
	 */
	protected $userCache;

	public function __construct() {
		$this->userCache = new File();
	}

	/**
	 * Get a value from the user cache
	 *
	 * @param string $key
	 * @return mixed
	 */
	public function get($key) {
		return $this->userCache->get($key);
	}

	/**
	 * Set a value in the user cache
	 *
	 * @param string $key
	 * @param string $value
	 * @param int $ttl Time To Live in seconds. Defaults to 60*60*24
	 * @return bool
	 */
	public function set($key, $value, $ttl = 0) {
		if (empty($key)) {
			return false;
		}
		return $this->userCache->set($key, $value, $ttl);
	}

	/**
	 * Check if a value is set in the user cache
	 *
	 * @param string $key
	 * @return bool
	 */
	public function hasKey($key) {
		return $this->userCache->hasKey($key);
	}

	/**
	 * Remove an item from the user cache
	 *
	 * @param string $key
	 * @return bool
	 */
	public function remove($key) {
		return $this->userCache->remove($key);
	}

	/**
	 * clear the user cache of all entries starting with a prefix
	 * @param string $prefix (optional)
	 * @return bool
	 */
	public function clear($prefix = '') {
		return $this->userCache->clear($prefix);
	}
}