<?php

class cache {
	public $token = "";

	private $db;

	public function __construct($rconnect, $rdb){
		$this->db = new Redis();	

		try {
			$this->db->connect($rconnect);
		} catch (Exception $e) {
			return $e->getMessage();
		}
		try {
			$this->db->ping();
		} catch (Exception $e) {
			return $e->getMessage();
		}
		try {
			$this->db->select($rdb);
		} catch (Exception $e) {
			return $e->getMessage();
		}
	}

	public function check(){
		try {
			return $this->db->ping();
		} catch (Exception $e) {
			return $e->getMessage();
		}
	}

	public function setKey($key, $value, $ttl = null){
		$this->db->set($key, $value, $ttl);
	}

	public function getValue($key){
		return $this->db->get($key);
	}

	public function getToken($data, $append = ""){
		$this->token = CACHEPREFIX . $append . md5(strtolower($data));
		return $this->token;
	}
	
	public function exists($key){
		return $this->db->exists($key);
	}

	public function delete($key){
		return $this->db->delete($key);
	}

	public function del($key){
		return $this->db->delete($key);
	}

	public function flush($token = null){
		if ( is_null($token) )
			return $this->db->flushDB();
		else
			return $this->db->delete($token);
	}
}