app.js

require("dotenv").config();
const createError = require("http-errors");
const express = require("express");
const session = require("express-session");
const bcrypt = require("bcryptjs");
const path = require("path");
const passport = require("passport");
const LocalStrategy = require("passport-local");
const cookieParser = require("cookie-parser");
const logger = require("morgan");
const mongoose = require("mongoose");
const User = require("./models/User");

const indexRouter = require("./routes/index");

const app = express();

const mongoDB = process.env.MONGODB_URI;
async function main() {
  try {
    await mongoose.connect(mongoDB);
  } catch (e) {
    console.error(e);
  }
}

main();

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

// middleware helpers
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: process.env.SESSION_KEY,
    cookie: { maxAge: 10 * 60 * 1000 }, // 10 mins in ms
    resave: false,
    saveUninitialized: true,
  })
);
passport.use(
  new LocalStrategy(
    { usernameField: "email" },
    async (email, password, done) => {
      try {
        const user = await User.findOne({ email });
        if (!user)
          return done(null, false, { errors: { email: "Email not found" } });

        const match = await bcrypt.compare(password, user.password);
        if (!match) {
          return done(null, false, {
            errors: { password: "Incorrect password" },
          });
        }

        return done(null, user);
      } catch (err) {
        console.error("error: ", err);
        return done(err);
      }
    }
  )
);
passport.serializeUser(function (user, done) {
  done(null, user.id);
});

passport.deserializeUser(async function (id, done) {
  try {
    const user = await User.findById(id);
    done(null, user);
  } catch (err) {
    done(err);
  }
});
app.use(passport.initialize());
app.use(passport.session());
app.use(function (req, res, next) {
  res.locals.currentUser = req.user;
  next();
});

// routes
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;