// ***********************************************常用函数*************************************************** \\

// API中生成返回结果的方法

// OpAndToAndFrom[0]参数为空时，系统将指定与对端相同的操作符

// OpAndToAndFrom[1]参数为空时，系统将指定与对端为接收者

// OpAndToAndFrom[2]参数为空时，系统将指定自身为发送者

func ReturnData(body interface{}, OpAndToAndFrom ...string) *NetData {

    data := &NetData{

        Status: SUCCESS,

        Body:   body,

    }

    if len(OpAndToAndFrom) > 0 {

        data.Operation = OpAndToAndFrom[0]

    }

    if len(OpAndToAndFrom) > 1 {

        data.To = OpAndToAndFrom[1]

    }

    if len(OpAndToAndFrom) > 2 {

        data.From = OpAndToAndFrom[2]

    }

    return data

}

// 返回错误，receive建议为直接接收到的*NetData

func ReturnError(receive *NetData, status int, msg string, nodeuid ...string) *NetData {

    receive.Status = status

    receive.Body = msg

    receive.From = ""

    if len(nodeuid) > 0 {

        receive.To = nodeuid[0]

    } else {

        receive.To = ""

    }

    return receive

}