Nodejs-Assignment-7

 Create User API & Product API using async & await. Handle asynchronous errors using try/catch OR express-async-handler module.

User API for ref

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//create mini-express app(A router)

const exp = require("express");

const userApp = exp.Router();

const expressAsyncHandler = require("express-async-handler");

const bryptjs = require("bcryptjs");

//body parser middleware

userApp.use(exp.json());

//CREATE user API

//create user

userApp.post(

"/user-signup",

expressAsyncHandler(async (request, response) => {

//get userCollectionObj

const userCollectionObj = request.app.get("userCollectionObj");

//get newUser from request

const newUser = request.body;

//check for duplicate user by username

let userOfDB = await userCollectionObj.findOne({

username: newUser.username,

});

//if user already existed, send res to clint as "User already existed"

if (userOfDB != null) {

response.status(200).send({ message: "User already existed" });

}

//if user not existed

else {

//hash the password

let hashedPassword = await bryptjs.hash(newUser.password, 5);

//replace plain pass with hashed password

newUser.password = hashedPassword;

//insert user

await userCollectionObj.insertOne(newUser);

//send res

response.status(201).send({ message: "User created" });

}

})

);

//export userApp

module.exports = userApp;