app.js

require("dotenv").config();
const createError = require("http-errors");
const express = require("express");
const path = require("path");
const cookieParser = require("cookie-parser");
const logger = require("morgan");
const expressLayouts = require("express-ejs-layouts");
const mongoose = require("mongoose");
const flash = require("connect-flash");
const session = require("express-session");
const passport = require("passport");
const STATIC_PATH = path.join(__dirname, "dist");

var indexRouter = require("./routes/index");
var usersRouter = require("./routes/users");
var adminRouter = require("./routes/admin");

let DATABASE_URL;

if (process.env.mode == "development" || process.env.mode == "production") {
	DATABASE_URL = require("./keys").mongoURI;
} else {
	DATABASE_URL = process.env.DATABASE_URL;
}

const app = express();

// Passport Config
require("./config/passport")(passport);

//Database Connection
mongoose.connect(DATABASE_URL, {
	useNewUrlParser: true,
	useUnifiedTopology: true
});
const db = mongoose.connection;
db.on("error", error => console.error(error));
db.once("open", () => console.log("Connected to Database"));

// view engine setup
app.set("views", path.join(__dirname, "views"));
app.set("view engine", "ejs");

app.use(logger("dev"));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(STATIC_PATH));

// Express session
app.use(
	session({
		secret: "secret",
		resave: true,
		saveUninitialized: true
	})
);

// Passport middleware
app.use(passport.initialize());
app.use(passport.session());

// Connect flash
app.use(flash());

// Global consts
app.use((req, res, next) => {
	res.locals.success_msg = req.flash("success_msg");
	res.locals.error_msg = req.flash("error_msg");
	res.locals.error = req.flash("error");
	next();
});

// routes for static files
app.use("/", express.static(STATIC_PATH));
app.use("/users", express.static(STATIC_PATH));
app.use("/admin", express.static(STATIC_PATH));

// routes
app.use(expressLayouts);
app.use("/", indexRouter);
app.use("/users", usersRouter);
app.use("/admin", adminRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
	next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
	// set locals, only providing error in development
	res.locals.message = err.message;
	res.locals.error = req.app.get("env") === "development" ? err : {};

	// render the error page
	res.status(err.status || 500);
	res.render("error");
});

module.exports = app;