写代码的时候，总是1个方法里把全部逻辑都实现了，修改的时候写了注释，自己都晕头转向， 一点都没有用到面向对象，怎么样才能精简自己的代码，看上去思路清晰，一目了然，请教大神指条明路！下面是代码

public function qqLogin(){

    $appid = C('APPID');
    $openid = I('openid');
    $accesstoken = I('accesstoken');
    $pid = I('pid');
    $url = "https://graph.qq.com/user/get_user_info?access_token=".$accesstoken."&oauth_consumer_key=".$appid."&openid=".$openid;

// 获取QQ用户详细信息

    $result = $this->http_curl($url);
    $User = M('users');
    if($result['ret'] == 0){

// QQ注册,查看是否注册过了

        $userRes = M('user_auths')->where(array('identity_type'=>'qq','identifier'=>$openid))->find();
        if(!$userRes)
        {
            $User->startTrans(); //开启事物
//            添加到users表
            $userdata['phone'] = 0;
            $res_user_uid = $User->add($userdata);
//            添加到user_auth表
            $userAuth['user_id'] = $res_user_uid;
            $userAuth['identity_type'] = 'qq';
            $userAuth['identifier'] = $openid;
            $userAuth['credential'] = $accesstoken;//第三方登陆的openid
            $userAuth['token'] = $this->create_token();//第三方登陆的access_token
            $userAuth['login_time'] = time();
            $userAuth['pid'] = $pid;//客户端推送的唯一ID
            $res_user_auths = M('user_auths')->add($userAuth);
            if($res_user_auths && $res_user_uid){
                $User->commit(); //如果两张表都添加成功 执行事物 添加操作
                $res = $User->where(array('id'=>$res_user_uid))->field('nickname,avatar,id')->find();
                $code = 1;
                $msg = '查询成功';
                $data['uId'] = $res['id'];
                if($res['nickname'] != "")
                {
                    $data['uName'] = $res['nickname'];    
                }
                if($res['avatar'] != "")
                {
                    $data['uIc'] = $res['avatar'];
                }
                if($res['phone'] != 0)
                {
                    $data['uTel'] = $res['phone'];
                }
                $data['uToken'] = M('user_auths')->where(array("id"=>$res_user_auths))->getField('token');
                echoMsg($code, $msg, $data); 
            }else
            {
                $User->rollback(); //事物回滚
            }
        
        }else{

// 登陆时 获取新的token值

                $token = $this->create_token();
                M('user_auths')->where(array("id"=>$userRes['id']))->save(array('token'=>$token,'login_time'=>time(),'pid'=>$pid));

// 返回数据信息

                $res = $User->where(array('id'=>$userRes['user_id']))->field('nickname,avatar,id')->find();
                $code = 1;
                $msg = '查询成功';
                $data['uId'] = $res['id'];
                if($res['nickname'] != "")
                {
                    $data['uName'] = $res['nickname'];    
                }
                if($res['avatar'] != "")
                {
                    $data['uIc'] = $res['avatar'];
                }
                if($res['phone'] != 0)
                {
                    $data['uTel'] = $res['phone'];
                }
                $data['uToken'] = M('user_auths')->where(array('id'=>$userRes['id']))->getField('token');
                echoMsg($code, $msg, $data);
        }
    }else{
            $code = 90001;
            $msg = '登陆失败';
            echoMsg($code, $msg);
    }

}