app.js

//JSON data
let inventaryRecords = require('./queries.json');
var express = require('express');
var app = express();
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var mongoose = require('mongoose');
var path = require('path');

app.use(cookieParser());
app.use(express.static('public'));
app.use(express.static(path.join(__dirname, 'public')));

app.use(bodyParser.json()); // support json encoded bodies
app.use(bodyParser.urlencoded({
		extended: true
}));

app.use((req, res, next) => {
		res.header("Access-Control-Allow-Origin", "*");
		res.header(
				"Access-Control-Allow-Headers",
				"Origin, X-Requested-With, Content-Type, Accept, Authorization"
		);
		if (req.method === "OPTIONS") {
				res.header("Access-Control-Allow-Methods", "PUT, POST, PATCH, DELETE, GET");
				return res.status(200).json({});
		}
		next();
});
const fs = require('fs');

mongoose.connect(
		"mongodb+srv://sid:kctaneja@cluster0-pqe9f.mongodb.net/test?retryWrites=true&w=majority", {
				useNewUrlParser: true
		}
).then(
() => {
	console.log('mongoose connected');
},
err => {
	console.log('mongoose connection failed');
 }
);
var nameSchema = mongoose.Schema({
		username: String,
		password: String,
		created: {
			type: Date,
			default: Date.now
		}
});
var User = mongoose.model("User", nameSchema);

app.post("/addname", (req, res) => {
		var myData = new User(req.body);
		myData.save()
				.then(item => {
						res.send("Name saved to database");
				})
				.catch(err => {
						res.status(400).send("Unable to save to database");
				});
});


app.post("/finduser", function(req, res) {
		console.log(req);

		User.find(req.body).exec().then(docs => {
				console.log(docs);
				if(docs.length > 0){
					if((req.body.username === docs[0].username) && (req.body.password === docs[0].password)) {
						res.status(200).json({status:true, value: "validated"});
					} else {
						res.status(200).json({status:false, value: "not validated"});
					}
				} else {
					res.status(200).json({status:false, value: "not validated"});
				}
		})
		.catch(err => {
				console.log(err);
				res.status(500).json({
						status:false, value: "not validated"
				});
		});
})


app.get('/users', function(req, res) {
	console.log(req);

		User.find()
				.exec()
				.then(docs => {
						console.log(docs);
						res.status(200).json(docs);
				})
				.catch(err => {
						console.log(err);
						res.status(500).json({
								error: err
						});
				});
})

app.listen(4000, function() {
		console.log('server running at port 4000');
})