server.js

const express = require('express');
const bodyParser = require('body-parser');
const path = require('path');
const mongoose = require('mongoose');
const UsersModel = require('./Models/users')
const dotenv = require('dotenv');
const userController = require('./Controllers/UserController');
const examController = require('./Controllers/ExamController');
const cors = require('cors');
const jwt = require('jsonwebtoken');
const verifyToken = require('./Middleware/VerifyJwt')

const app = express();

app.use(bodyParser.json());
app.use(express.static(__dirname));
app.use(cors({
    origin: "*",
    methods: ["GET","POST"],
    allowedHeaders: ['Content-Type']
}))

dotenv.config();

const dbUri = process.env.DB_URL;
mongoose.connect(dbUri,{useNewUrlParser: true, useUnifiedTopology: true})
.then(result=>{
    console.log("Connected to db")
}).catch(err=>console.log(err));

app.post('/add-user', verifyToken, (req,res)=>{
    userController.AddUser(req,res);
})
app.get('/all-users',(req,res)=>{
    userController.FindUsers(res)
})
app.get('/single-user',(req,res)=>{
    userController.FindSingleUser(req,res);
})
app.post('/delete-user',(req,res)=>{
    userController.DeleteUser(req,res);
})
app.post('/update-user',(req,res)=>{
    userController.UpdateUser(req,res);
})

app.post('/add-exam', (req,res)=>{
    examController.addExam(req,res);
})
app.get('/all-exams',(req,res)=>{
    examController.getExams(req,res);
})
app.post('/add-question',(req,res)=>{
    examController.addQuestion(req,res);
})
app.post('/delete-question',(req,res)=>{
    examController.deleteQuestion2(req,res);
})
app.get('/exams/:id',(req,res)=>{
    examController.getOneExam(req,res);
});
app.get('/admin/*',(req,res)=>{
    res.sendFile(path.join(__dirname,'Static/admin.html'))
})
app.get('/admin', (req,res)=>{
    res.sendFile(path.join(__dirname,'Static/admin.html'))
})
app.get('/login',(req,res)=>{
    res.sendFile(path.join(__dirname,'Static/login.html'))
})
app.post('/loginuser',(req,res)=>{
    //Authenticate user and reply with token
     userController.FindUser(req,res);
})

app.post('/user/admin',verifyToken,(req,res)=>{
    jwt.verify(req.token, 'secretkey', (err, authData)=>{
        if(err){
            res.sendStatus(403);
        }
        else{
            res.json({
                message: 'verification successful',
                authData
            })
        }
    })
})

app.all('/*',(req,res)=>{
    res.status(404).send({404: 'PAGE NOT FOUND!'})
})

/*
    FORMAT OF TOKEN 
    Authorization: Bearer <access_token>
*/



if(process.env.NODE_ENV === 'production'){
    app.listen();
}
else{
    const port = process.env.PORT || 5000;
    app.listen(port, ()=>console.log(`Server started on port ${port}`));
}