user.js

const express = require('express');
const router = express.Router();
const {check, validationResult} = require("express-validator");
const gravatar = require("gravatar");
const bcrypt = require("bcryptjs");
const jwt = require("jsonwebtoken");
const config = require("config");

const User = require("../../model/User");


//@route    post api/users
//@desc     User Register route
//@access   Public 
router.post('/',[ 
                check("name", "Name is required")
                .not()
                .isEmpty(),
                check("email", "Please include a valid email").isEmail(),
                check(
                    "password", "please enter a password with 6 characters"
                ).isLength({ min:6 })
            ], 
    async (req, res) => {
        const errors = validationResult(req);
    if(!errors.isEmpty()){
        return res.status(400).json({ errors: errors.array()});
    }
    console.log(req.body);

    const {name, email, password} = req.body;

    try {
     
        let    user = await User.findOne({ email: email}  );

        if(user){
   return res.status(400).json({ errors: [{msg: "user already exist"} ] });

        }

        const avatar = gravatar.url(email, {
            s: "200",
            r: "pg",
            d: "mm"

        })

        user = new User({
            name, 
            email,
            avatar,
            password

        });
            

        const salt = await bcrypt.genSalt(10);

        user.password = await bcrypt.hash(password, salt);

        await user.save();


        const payload = {
            user:   {
                id: user.id
            }
        }

            jwt.sign(payload, 
                config.get("jwtSecret"),
                {expiresIn: 360000},
                (err, token)=>{
                    if(err) throw err;
                    res.json({token});
                });
   
         } catch (err) {
        console.error(err.message);
        res.status(500).send("server error");
    }
});

module.exports = router;