app.js

var createError = require("http-errors");
var express = require("express");
var path = require("path");
var cookieParser = require("cookie-parser");
var cors = require("cors");
var logger = require("morgan");
require("dotenv").config();
const mongoose = require("mongoose");
var indexRouter = require("./routes/index");

// database connection

const connectDatabase = async (req, res) => {
  try {
    await mongoose.connect(process.env.MONGO_URL);

    console.log("Database connected successfully");
  } catch (err) {
    console.error("Database connection error:", err.message);
  }
};

connectDatabase();

var app = express();

// 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(path.join(__dirname, "public")));
app.use(cors());

app.use("/", indexRouter);

// 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;