<?php

/**
 * @author Any
 * @description KISS
 * @date 2021年8月10日
 * @version 1.0.0
 * 
 * _____LOG_____
 * 
 */
namespace app\components;



class LockUtil
{
    public $enabled = true;
    public $expire_time;   //锁有效时长
    
    private $lock_name;     //锁名称
    private $cx_mch_id;
    private $cx_client_id;



    public function __construct($cx_mch_id, $cx_client_id) {
        $this->cx_mch_id = $cx_mch_id;
        $this->cx_client_id = $cx_client_id;
        $this->expire_time = 86400 * 365;
    }
    
    private function get_lock_name($lock_name = null)
    {
        if($lock_name == null){
            $lock_name = \Yii::$app->request->getPathInfo();
            $lock_name = "LK{$this->cx_mch_id}_" . md5($lock_name) . "_" .$this->cx_client_id;            
        }
        return $lock_name;
    }


    public function acquire($lock_name = null)
    {
        if(!$this->enabled){
            return true;
        }
        $lock_name = $this->get_lock_name($lock_name);
        $lock = FlashStorage::getCache($lock_name);
        if($lock)
            return false;        
        return FlashStorage::setCache($lock_name, time(), $this->expire_time);
    }
    
    public function release($lock_name = null)
    {
        if(!$this->enabled){
            return true;
        }        
        $lock_name = $this->get_lock_name($lock_name);
        $lock = FlashStorage::getCache($lock_name);
        if(!$lock)
            return false;
        return FlashStorage::deleteCache($lock_name);
    }
}