app.js

var mongoose = require("mongoose");
var createError = require("http-errors");
var express = require("express");
var exphbs = require("express-handlebars");
var path = require("path");
var cookieParser = require("cookie-parser");
var logger = require("morgan");
var session = require("express-session");
var flash = require("connect-flash");

require("dotenv").config();

// The database setup
// we should probable store the url in .env for security reasons.
var databaseUrl =
  "mongodb://job_alert_admin:#developerHNG1@ds135456.mlab.com:35456/job_alert_db";

// connect to database
mongoose.connect(databaseUrl, { useNewUrlParser: true }, function(err, client) {
  if (err) console.log(err);
  console.log("Connection passed");
});

let db = mongoose.connection;

db.once("open", () => console.log("Connected to database"));

// checks if connection to db is a success
db.on("error", console.error.bind(console, "Database connection error:"));

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

var app = express();

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

app.engine(".hbs", exphbs({ defaultLayout: "main", extname: ".hbs" }));

app.set("view engine", "hbs");

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(
  session({
    secret: "dfgdhhahg15sdff",
    saveUninitialized: false,
    resave: false
  })
);
app.use(flash());

//locals
app.use(function(req, res, next) {
  res.locals.success = req.flash("success");
  res.locals.emailError = req.flash("emailError");
  res.locals.errors = req.flash("errors");
  next();
});

app.use("/", indexRouter);
// app.use('/users', usersRouter);

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

console.log("Server running on PORT 3000");

// 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;