app.js

const express = require('express')
const bodyParser = require('body-parser')
const app = express()
const mongoose = require('mongoose');
const url = 'mongodb://localhost/blogDb';

const User = require('./model/user');
const Post = require('./model/post');

app.use(bodyParser.json())
app.use(bodyParser.urlencoded({ extended: false }))

app.post('/api/user/login', (req, res) => {
    mongoose.connect(url,/*{ useMongoClient: true }, */ { useNewUrlParser: true }, function (err) {
        if (err) throw err;
        User.find({
            username: req.body.username, password: req.body.password
        }, function (err, user) {
            if (err) throw err;
            if (user.length === 1) {
                return res.status(200).json({
                    status: 'success',
                    data: user
                })
            } else {
                return res.status(200).json({
                    status: 'fail',
                    message: 'Login Failed'
                })
            }

        })
    });
});

app.post('/api/post/getAllPost', (req, res) => {
    mongoose.connect(url, /*{ useMongoClient: true },*/ { useNewUrlParser: true }, function (err) {
        if (err) throw err;
        Post.find({}, [], { sort: { _id: -1 } }, (err, doc) => {
            if (err) throw err;
            return res.status(200).json({
                status: 'success',
                data: doc
            })
        })
    });
});

app.post('/api/post/createPost', (req, res) => {
    mongoose.connect(url, /*{ useMongoClient: true },*/ { useNewUrlParser: true }, function (err) {
        if (err) throw err;
        const post = new Post({
            title: req.body.title,
            description: req.body.description
        })
        post.save((err, doc) => {
            if (err) throw err;
            return res.status(200).json({
                status: 'success',
                data: doc
            })
        })
    });
});

app.post('/api/post/updatePost', (req, res) => {
    mongoose.connect(url, /*{ useMongoClient: true },*/ { useNewUrlParser: true }, function (err) {
        if (err) throw err;
        Post.update(
            { _id: req.body.id },
            { title: req.body.title, description: req.body.description },
            (err, doc) => {
                if (err) throw err;
                return res.status(200).json({
                    status: 'success',
                    data: doc
                })
            })
    });
});


app.post('/api/post/deletePost', (req, res) => {
    mongoose.connect(url, /*{ useMongoClient: true },*/ { useNewUrlParser: true }, function (err) {
        if (err) throw err;
        Post.findByIdAndRemove(req.body.id,
            (err, doc) => {
                if (err) throw err;
                return res.status(200).json({
                    status: 'success',
                    data: doc
                })
            })
    });
})

app.listen(3000, () => console.log('blog server running on port 3000!'));