<?php

namespace common\components;

use Yii;
use yii\base\Component;
use yii\db\Transaction as DbTransaction;

class Transaction extends Component{

    
    /**
     * 开启一个事务，不嵌套，多次调用只在一个事务中，兼容mycat
     * @Author bing
     * @DateTime 2021-10-14 10:59:56
     * @copyright: Copyright (c) 2020 广东七件事集团
     * @return DbTransaction
     */
    public $dirver;//数据库【mycat mysql】
    private $level=0;
    private $transaction;
    public function start(){
        if($this->dirver == 'mysql') return Yii::$app->db->beginTransaction();
        $this->transaction = Yii::$app->db->getTransaction();
        if($this->transaction){
            $this->transaction = Yii::$app->db->beginTransaction();
        }
        $this->level ++;
        return $this;
        // $level = Yii::$app->db->getTransaction()->getLevel();
    }

    public function rollback(){
        $this->level --;
        if($this->level === 0){
            $this->transaction->rollback();
            return;
        }
    }


    public function commit(){
        $this->level --;
        if($this->level === 0){
            $this->transaction->commit();
        }
    }

    public function getLevel(){
        $this->transaction->commit();
        return $this->level;
    }

}