註冊

註冊流程如下：

知道流程後，程式該怎麼寫呢?

app.post('/register', function (req, res) {

    var user;
    //TODO 用req.body.username去lowdb找資料回傳給user 

    //如果沒找到資料
    if (!user) {

        //TODO 將req.body寫進資料庫裡

        res.send({
            code: 200,
            msg: "register successfully"
        });

    } else {
        //TODO 用res.send({ ... });去回傳帳號已存在
    }


});

完整版

app.post('/register', function (req, res) {

    var user =
        db.get('users')
            .find({ username: req.body.username })
            .value();

    if (!user) {
        var newUser =
            db.get('users')
                .push(req.body)
                .last()
                .assign({ id: uuid() })
                .write();

        console.log(req.body);
        res.send({
            code: 200,
            msg: "register successfully"
        });
    } else {
        res.send({
            code: 409,
            msg: "username is alreay existed"
        });
    }

});