app.js

require('dotenv').config(); // Load environment variables from .env file

// Required modules
const express = require("express");
const app = express();
const bodyParser = require("body-parser");
const mongoose = require("mongoose");
const methodOverride = require("method-override");
const flash = require("connect-flash");
const passport = require("passport");
const LocalStrategy = require("passport-local");
const session = require("express-session");
const moment = require("moment");

// Models
const Campground = require("./models/campground");
const Comment = require("./models/comment");
const User = require("./models/user");

// Routes
const commentRoutes = require("./routes/comments");
const campgroundRoutes = require("./routes/campgrounds");
const indexRoutes = require("./routes/index");

// App configuration
app.set("view engine", "ejs");
app.use(bodyParser.urlencoded({ extended: true }));
app.use(express.static(__dirname + "/public"));
app.use(methodOverride("_method"));
app.use(flash());

// Passport configuration
app.use(session({
  secret: "shibas are the best dogs in the world.",
  resave: false,
  saveUninitialized: false
}));
app.use(passport.initialize());
app.use(passport.session());
passport.use(new LocalStrategy(User.authenticate()));
passport.serializeUser(User.serializeUser());
passport.deserializeUser(User.deserializeUser());

// Middleware to pass currentUser, error, and success messages to all views
app.use(function(req, res, next) {
  res.locals.currentUser = req.user;
  res.locals.error = req.flash("error");
  res.locals.success = req.flash("success");
  res.locals.moment = moment; // Make moment.js available in all views
  next();
});

// Connect to MongoDB
mongoose.connect(process.env.DATABASEURL, {
  useNewUrlParser: true,
  useUnifiedTopology: true
}).then(() => {
  console.log("Connected to MongoDB");
}).catch(err => {
  console.error("Error connecting to MongoDB:", err.message);
});


// Routes
app.use("/", indexRoutes);
app.use("/campgrounds", campgroundRoutes);
app.use("/campgrounds/:id/comments", commentRoutes);

// Error handling for undefined routes
app.get("*", function(req, res) {
  res.render("error");
});

// Start server
const port = process.env.PORT || 3000;
app.listen(port, function() {
  console.log(`Server started on http://localhost:${port}/`);
});