app.js

// this is environment variable
if (process.env.NODE_ENV !== "production") {
require("dotenv").config();
}

const express = require("express");
const path = require("path");
const mongoose = require("mongoose");
const ejsMate = require("ejs-mate");
const session = require("express-session");
const flash = require("connect-flash");
const catchAsync = require("./utils/catchAsync");
const ExpressError = require("./utils/ExpressError");
const methodOverride = require("method-override");
const passport = require("passport");
const LocalStrategy = require("passport-local");
const User = require("./models/user");
const mongoSanitize = require("express-mongo-sanitize");
const userRoutes = require("./routes/users");
const campgroundRoutes = require("./routes/campgrounds.js");
const reviewRoutes = require("./routes/reviews.js");
const MongoStore = require("connect-mongo");

const MongoDBStore = require("connect-mongo")(session);
// const dbUrl = process.env.DB_URL;
const dbUrl = process.env.DB_URL || "mongodb://127.0.0.1:27017/yelp-camp";

// Connect to MongoDB
mongoose
  .connect(dbUrl, {
    useNewUrlParser: true,
    useUnifiedTopology: true,
    // useCreateIndex: true,
    // useFindAndModify: false,
    // strictQuery: false
  })
  .then(() => {
    console.log("Database Connected!!!");
  })
  .catch((error) => {
    console.error("Database Connection Error:", error);
  });

const db = mongoose.connection;
db.on("error", console.error.bind(console, "connection error:"));
db.once("open", () => {
  console.log("Database Connected!");
});

const app = express();

// Set up view engine and views directory
app.engine("ejs", ejsMate);
app.set("view engine", "ejs");
app.set("views", path.join(__dirname, "views"));

app.use(express.urlencoded({ extended: true }));
app.use(methodOverride("_method"));
app.use(express.static(path.join(__dirname, "public")));
app.use(
  mongoSanitize({
    replaceWith: "_",
  })
);

const store = new MongoDBStore({
  url: dbUrl,
  secret: "thisshouldbebettersecret!",
  touchAfter: 24 * 60 * 60,
});

store.on("error", function (e) {
  console.log("SESSION STORE ERROR", e);
});

const sessionConfig = {
  store,
  secret: "thisshouldbebettersecret!",
  resave: false,
  saveUninitialized: true,
  cookie: {
    httpOnly: true,
    expires: Date.now() + 1000 * 60 * 60 * 24 * 7,
    maxAge: 1000 * 60 * 60 * 24 * 7,
  },
};
app.use(session(sessionConfig));
app.use(flash());

app.use(passport.initialize());
app.use(passport.session());
passport.use(new LocalStrategy(User.authenticate()));

passport.serializeUser(User.serializeUser());
passport.deserializeUser(User.deserializeUser());

app.use((req, res, next) => {
  // console.log(req.query);
  res.locals.currentUser = req.user;
  res.locals.success = req.flash("success");
  res.locals.error = req.flash("error");
  next();
});

app.use("/", userRoutes);
app.use("/campgrounds", campgroundRoutes);
app.use("/campgrounds/:id/reviews", reviewRoutes);

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

app.all("*", (req, res, next) => {
  next(new ExpressError("Page Not Found", 404));
});

// Error handling middleware
app.use((err, req, res, next) => {
  const { statusCode = 500 } = err;
  if (!err.message) err.message = "OH NO, Somthing went wrong!!";
  res.status(statusCode).render("error", { err });
});

// Start the server
const port = process.env.PORT || 3000;
app.listen(port, () => {
  console.log(`Serving on Post ${port}`);
});