<?php

/*
 * Copyright 2004-2017, AfterLogic Corp.
 * Licensed under AGPLv3 license or AfterLogic license
 * if commercial version of the product was purchased.
 * See the LICENSE file for a full license statement.
 */

namespace MailSo\Cache;

/**
 * @category MailSo
 * @package Cache
 */
class CacheClient
{
	/**
	 * @var \MailSo\Cache\DriverInterface
	 */
	private $oDriver;

	/**
	 * @var string
	 */
	private $sCacheIndex;

	/**
	 * @access private
	 */
	private function __construct()
	{
		$this->oDriver = null;
		$this->sCacheIndex = '';
	}

	/**
	 * @return \MailSo\Cache\CacheClient
	 */
	public static function NewInstance()
	{
		return new self();
	}

	/**
	 * @param string $sKey
	 * @param string $sValue
	 *
	 * @return bool
	 */
	public function Set($sKey, $sValue)
	{
		return $this->oDriver ? $this->oDriver->Set($sKey.$this->sCacheIndex, $sValue) : false;
	}
	
	/**
	 * @param string $sKey
	 *
	 * @return bool
	 */
	public function SetTimer($sKey)
	{
		return $this->Set($sKey.'/TIMER', time());
	}

	/**
	 * @param string $sKey
	 * @param string $bClearAfterGet = false
	 *
	 * @return string
	 */
	public function get($sKey, $bClearAfterGet = false)
	{
		$sValue = '';

		if ($this->oDriver)
		{
			$sValue = $this->oDriver->get($sKey.$this->sCacheIndex);
		}

		if ($bClearAfterGet)
		{
			$this->Delete($sKey);
		}

		return $sValue;
	}

	/**
	 * @param string $sKey
	 *
	 * @return int
	 */
	public function GetTimer($sKey)
	{
		$iTimer = 0;
		$sValue = $this->get($sKey.'/TIMER');
		if (0 < strlen($sValue) && is_numeric($sValue))
		{
			$iTimer = (int) $sValue;
		}

		return $iTimer;
	}

	/**
	 * @param string $sKey
	 *
	 * @return \MailSo\Cache\CacheClient
	 */
	public function Delete($sKey)
	{
		if ($this->oDriver)
		{
			$this->oDriver->Delete($sKey.$this->sCacheIndex);
		}

		return $this;
	}

	/**
	 * @param \MailSo\Cache\DriverInterface $oDriver
	 *
	 * @return \MailSo\Cache\CacheClient
	 */
	public function SetDriver(\MailSo\Cache\DriverInterface $oDriver)
	{
		$this->oDriver = $oDriver;

		return $this;
	}

	/**
	 * @param int $iTimeToClearInHours = 24
	 *
	 * @return bool
	 */
	public function gc($iTimeToClearInHours = 24)
	{
		return $this->oDriver ? $this->oDriver->gc($iTimeToClearInHours) : false;
	}

	/**
	 * @return bool
	 */
	public function IsInited()
	{
		return $this->oDriver instanceof \MailSo\Cache\DriverInterface;
	}

	/**
	 * @param string $sCacheIndex
	 *
	 * @return \MailSo\Cache\CacheClient
	 */
	public function SetCacheIndex($sCacheIndex)
	{
		$this->sCacheIndex = 0 < \strlen($sCacheIndex) ? "\x0".$sCacheIndex : '';

		return $this;
	}
}
