app.js

//jshint esversion:6
require("dotenv").config();
const express = require("express");
const body_parser = require("body-parser");
const ejs = require("ejs");
const bodyParser = require("body-parser");
const mongoose = require("mongoose");
const session = require("express-session");
const passport = require("passport");
const passportLocalMongoose = require("passport-local-mongoose");
const GoogleStrategy = require("passport-google-oauth20").Strategy;
const findOrCreate = require("mongoose-findorcreate");
const app = express();

app.use(express.static("public"));
app.set("view engine", "ejs");

app.use(
  bodyParser.urlencoded({
    extended: true,
  })
);

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

app.use(passport.initialize());
app.use(passport.session());

// ----- Mongoose -------- ////
main().catch((err) => console.log(err));

async function main() {
  await mongoose.connect("mongodb://127.0.0.1:27017/userDB", {
    useNewUrlParser: true,
  });
}

const userSchema = new mongoose.Schema({
  email: String,
  password: String,
  googleId: String,
  secret: String
});

userSchema.plugin(passportLocalMongoose);
userSchema.plugin(findOrCreate);

const User = new mongoose.model("User", userSchema);

passport.use(User.createStrategy());

passport.serializeUser(function (user, cb) {
  process.nextTick(function () {
    cb(null, { id: user.id, username: user.username, name: user.name });
  });
});

passport.deserializeUser(function (user, cb) {
  process.nextTick(function () {
    return cb(null, user);
  });
});

passport.use(
  new GoogleStrategy(
    {
      clientID: process.env.CLIENT_ID,
      clientSecret: process.env.CLIENT_SECRET,
      callbackURL: "http://localhost:3000/auth/google/secrets",
      userProfileURL: "https://www.googleapis.com/oauth2/v3/userinfo",
    },
    function (accessToken, refreshToken, profile, cb) {
      console.log(profile);
      User.findOrCreate({ googleId: profile.id }, function (err, user) {
        return cb(err, user);
      });
    }
  )
);

app.get("/", function (req, res) {
  res.render("home");
});
app.get(
  "/auth/google",
  passport.authenticate("google", { scope: ["profile"] })
);

app.get(
  "/auth/google/secrets",
  passport.authenticate("google", { failureRedirect: "/login" }),
  function (req, res) {
    // Successful authentication, redirect home.
    res.redirect("/secrets");
  }
);
app.get("/login", function (req, res) {
  res.render("login");
});
app.get("/register", function (req, res) {
  res.render("register");
});

app.get("/secrets", function (req, res) {
  User.find({"secret":{$ne:null}})
  .then(foundUsers => {
    res.render("secrets", {usersWithSecrets: foundUsers});
  })
});

app.get("/submit", function (req, res) {
  if (req.isAuthenticated()) {
    res.render("submit");
  } else {
    res.redirect("/login");
  }
});

app.post("/submit", function(req, res){
  const submittedSecret = req.body.secret;
  User.findById(req.user.id)
  .then(foundUser=>{
    if(foundUser){
      foundUser.secret = submittedSecret;
      foundUser.save()
      .then(found=> {
        res.redirect("/secrets");
      })
      .catch(err => {
        console.log(err);
      });
    }
  })
  .catch(err => {
    console.log(err);
  });
});

app.post("/register", function (req, res) {
  User.register(
    { username: req.body.username },
    req.body.password,
    function (err, user) {
      if (err) {
        console.log(err);
        res.redirect("/register");
      } else {
        passport.authenticate("local")(req, res, function () {
          res.redirect("/secrets");
        });
      }
    }
  );
});

app.post("/login", function (req, res) {
  const user = new User({
    username: req.body.username,
    password: req.body.password,
  });

  req.logIn(user, function (err) {
    if (err) {
      console.log(err);
    } else {
      passport.authenticate("local")(req, res, function () {
        res.redirect("/secrets");
      });
    }
  });
});

app.get("/logout", function (req, res, next) {
  req.logOut(function (err) {
    if (err) {
      return next(err);
    } else {
      res.redirect("/");
    }
  });
});

app.listen(3000, function (req, res) {
  console.log("Server started on port 3000");
});