server.js

const express = require("express");
const app = express();
require("dotenv").config();
app.set("view engine", "ejs");
app.use(express.static(__dirname + "/public"));
app.use(express.urlencoded({ extended: true }));

const mongoose = require("mongoose");

const Document = require("./models/Document");
// const URI = `mongodb+srv://admin:${process.env.PASSWORD}@dip-bin.ysmvr.mongodb.net/Randomtext?retryWrites=true&w=majority`;
const URI = process.env.MONGODB_URI;

app.listen(process.env.PORT);

(async () => {
	try {
		const connection = await mongoose.connect(URI, {
			useNewUrlParser: true,
			useUnifiedTopology: true,
		});
	} catch (e) {
		console.log(e);
	}
})();

app.get("/", (req, res) => {
	const code = `Sharing code is a good thing, and it should be _really_ easy to do it.
A lot of times, I want to show you something I'm seeing - and that's where we
use pastebins.Haste is the prettiest, easiest to use pastebin ever made`;

	res.render("code_window", { code, language: "plaintext" });
});

app.get("/new", (req, res) => {
	res.render("new");
});

app.post("/save", async (req, res) => {
	const value = req.body.value;
	try {
		//create() is a static function of the Model class
		const document = await Document.create({ text: value });
		const id = document._id.toString();
		res.redirect(`/${id}`);
		// console.log(document._id.toString());
	} catch (e) {
		console.log(e);
		res.render("new", { value });
	}
});

app.get("/:id", async (req, res) => {
	const id = req.params.id;

	try {
		const doc = await Document.findById(id);
		res.render("code_window", { code: doc.text, id });
	} catch (e) {
		res.redirect("/");
	}
});

app.get("/:id/duplicate", async (req, res) => {
	const id = req.params.id;

	try {
		const doc = await Document.findById(id);
		res.render("new", { value: doc.text });
	} catch (e) {
		res.redirect("/");
	}
});