Authenticating Functionality

// routes/admin.js
var express = require('express');
var router = express.Router();

router.post('/login', function(req, res, next) {
  const login = require('../controllers/login');
  login.postLogin(req, res);
});

module.exports = router;

// controllers/login.js
class Login{
  constructor(){
    this.deepcopy = require('deepcopy');
    this.vdict = require('../config');
    this.usersdb = require('../models/usersdb');
    this.bcrypt = require('bcryptjs');
  }

  postLogin(req, res){
    const self = this;
    const data = this.deepcopy(this.vdict);
    delete data.databaseAccess;

    this.usersdb.checkUser(req, function(user){
      if(user){
        if(self.bcrypt.compareSync(req.body.password, user.password)){
          req.session.user = user;
          data.success = true;
          res.json(data);
        }else{
          data.message = 'The password is wrong.';
          data.success = false;
          res.json(data);
        }
      }else{
        data.message = 'The email is wrong.';
        data.success = false;
        res.json(data);
      }
    });
  }

}//end class

module.exports = new Login();

// models/usersdb.js
class Usersdb{
  constructor(){
    const mongoose = require('mongoose');
    const bcrypt = require('bcryptjs');

    const usersSchema = new mongoose.Schema({
      username: {type: String, required: true},
      userid: {type: String, required: true},
      password: {type: String, required: true},
      email: {type: String, required: true},
      role: {type: String, required: true},
      info: {type: String, required: false},
      date: {type: Date, required: true}
    });

    const users = mongoose.model('users', usersSchema);
    this.users = users;
    this.bcrypt = bcrypt;

    users.findOne(function (err, user){
      if (err) return console.error(err);
      if(!user){
        const hash = bcrypt.hashSync('password', 12);
        const id = (new Date()).getTime().toString(36) + Math.random().toString(36).slice(2);
        const root = new users({userid:id, username:'root', password:hash, email:'root@multimedia.com', role:'Admin', info:'test', date: new Date()});
        root.save(function (err, root){
          if (err) return console.error(err);
        });
      }
    });
  }

  checkUser(req, callback){
    this.users.findOne({email:req.body.email}, function (err, user){
      if (err) return console.error(err);
      return callback(user);
    });
  }

}//class ending 

module.exports = new Usersdb();

import React from 'react';
import './login.scss';

import tool from '../tool.js';

class Login extends React.Component{
  constructor(props){
    super(props);
    this.state = {
      message: '',
      email: '',
      password: '',
      siteTitle: 'Dashboard'
    };
  }

  onChangeHandler = (event) => {
    let nam = event.target.name;
    let val = event.target.value;
    this.setState({[nam]: val});
  }

  onSubmitHandler = async (event) => {
    event.preventDefault();
    const option = {
      email: this.state.email,
      password: this.state.password
    }
    const result = await tool.fetchPostAPI('/admin/login', option);
    this.setState({
      message: result.message,
      siteTitle: result.siteTitle
    });
  }

  render(){
    return(
      <div className='Login region'>
        <form id="login" action="/admin/login" method="post" onSubmit={this.onSubmitHandler}>
          <span>Email:</span><input onChange={this.onChangeHandler} type="email" name="email" required />
          <span>Password:</span><input onChange={this.onChangeHandler} type="password" name="password" required />
          <span></span><input type="submit"  />
        </form>
        <div className="message"> {this.state.message} </div>
      </div>
    );
  }
}

export default Login;

GitHub: "https://github.com/Sokhavuth/emultimedia
Heroku: https://khmerweb-emultimedia.herokuapp.com/