<?php
/*
+--------------------------------------------------------------------------
|   WeCenter [#RELEASE_VERSION#]
|   ========================================
|   by WeCenter Software
|   © 2011 - 2014 WeCenter. All Rights Reserved
|   http://www.wecenter.com
|   ========================================
|   Support: WeCenter@qq.com
|
+---------------------------------------------------------------------------
*/

class core_cache
{
	private $cache_factory;
	private $frontendName = 'Core';

	private $frontendOptions = array(
		'lifeTime' => 3600,
		'automatic_serialization' => TRUE
	);

	// 支持 File, Memcached, APC, Xcache, 手册参考: http://framework.zend.com/manual/zh/zend.cache.html
private $backendName = 'Memcached';



private $backendOptions = array(



    // Memcache 配置

    'servers' => array(

        array(

            'host' => '42.121.131.146', 

            'port' => 11211, 

            'persistent' => true,

            'timeout' => 5,

            'compression' => false, // 压缩

            'compatibility' => false    // 兼容旧版 Memcache servers

        )   

    )

);
	private $groupPrefix = '_group_';
	private $cachePrefix = '_cache_';


	public function __construct()
	{
		$this->groupPrefix = G_COOKIE_HASH_KEY . $this->groupPrefix;
		$this->cachePrefix = G_COOKIE_HASH_KEY . $this->cachePrefix;

		if (defined('IN_SAE'))
		{
			$this->backendName = 'Memcached';
		}
		else if ($this->backendName == 'File')
		{
			$cache_dir = ROOT_PATH . 'cache/';

			if (!file_exists($cache_dir . 'index.html'))
			{
				file_put_contents($cache_dir . 'index.html', '');
			}

			$this->backendOptions = array(
				'cache_dir' => realpath($cache_dir),
				'hashed_directory_level' => 1,
				'read_control_type' => 'adler32',
				'file_name_prefix' => substr(md5(G_SECUKEY), 0, 6)
			);
		}

		$this->cache_factory = Zend_Cache::factory($this->frontendName, $this->backendName, $this->frontendOptions, $this->backendOptions);

		AWS_APP::debug_log('cache', null, 'Backend: ' . $this->backendName);

		return true;
	}

	/**
	 * SET
	 * @param  $key
	 * @param  $value
	 * @param  $group
	 * @param  $lifetime
	 * @return boolean
	 */
	public function set($key, $value, $lifetime = 60, $group = null)
	{
		if (AWS_APP::config()->get('system')->debug)
		{
			list($usec, $sec) = explode(' ', microtime());
			$start_time = (float)$usec + (float)$sec;
		}

		if (! $key)
		{
			return false;
		}

		$result = $this->cache_factory->save($value, $this->cachePrefix . $key, array(), $lifetime);

		if ($group)
		{
			if (is_array($group))
			{
				if (count($group) > 0)
				{
					foreach ($group as $cg)
					{
						$this->setGroup($cg, $key, $lifetime);
					}
				}
			}
			else
			{
				$this->setGroup($group, $key, $lifetime);
			}
		}

		if (AWS_APP::config()->get('system')->debug)
		{
			list($usec, $sec) = explode(' ', microtime());
			$end_time = (float)$usec + (float)$sec;
			$stime = sprintf("f", $end_time - $start_time);

			AWS_APP::debug_log('cache', $stime, 'Save Cache: ' . $key . ', result type: ' . gettype($value));
		}

		return $result;
	}

	/**
	 * GET
	 * @param  $key
	 */
	public function get($key)
	{
		if (AWS_APP::config()->get('system')->debug)
		{
			list($usec, $sec) = explode(' ', microtime());
			$start_time = (float)$usec + (float)$sec;
		}

		if (! $key)
		{
			return false;
		}

		$result = $this->cache_factory->load($this->cachePrefix . $key);

		if (AWS_APP::config()->get('system')->debug)
		{
			list($usec, $sec) = explode(' ', microtime());
			$end_time = (float)$usec + (float)$sec;
			$stime = sprintf("f", $end_time - $start_time);

			AWS_APP::debug_log('cache', $stime, 'Get Cache: ' . str_replace($this->groupPrefix, '', $key) . ', result type: ' . gettype($result));
		}

		return $result;
	}

	/**
	 * SET_GROUP
	 * @param  $group_name
	 * @param  $key
	 */
	public function setGroup($group_name, $key, $lifetime)
	{
		$groupData = $this->get($this->groupPrefix . $group_name);

		if (is_array($groupData) && in_array($key, $groupData))
		{
			return false;
		}

		$groupData[] = $key;

		return $this->set($this->groupPrefix . $group_name, $groupData, $lifetime);
	}

	/**
	 * GET GROUP
	 * @param  $group_name
	 */
	public function getGroup($group_name)
	{
		return $this->get($this->groupPrefix . $group_name);
	}

	/**
	 * CLEAN GROUP
	 * @param  $group_name
	 */
	public function cleanGroup($group_name)
	{
		$groupData = $this->get($this->groupPrefix . $group_name);

		if ($groupData && is_array($groupData))
		{
			foreach ($groupData as $item)
			{
				$this->delete($item);
			}
		}

		$this->delete($this->groupPrefix . $group_name);
	}

	/**
	 * DELETE
	 * @param  $key
	 */
	public function delete($key)
	{
		$key = $this->cachePrefix . $key;

		return $this->cache_factory->remove($key);
	}

	/**
	 * CLEAN
	 */
	public function clean()
	{
		return $this->cache_factory->clean(Zend_Cache::CLEANING_MODE_ALL);
	}

	/**
	 * START
	 * @param  $key
	 */
	public function start($key)
	{
		$key = $this->cachePrefix . $key;

		$this->cache_factory->start($key);
	}

	/**
	 * END
	 */
	public function end()
	{
		$this->cache_factory->end();
	}
}