app.js

//jshint esversion:6
// read documentation of passport,passportLocalMongoose,passportLocal,express session for more understanding. and also watch angela's video again.
require("dotenv").config();
const express = require("express");
const bodyParser = require("body-parser");
const ejs = require("ejs");
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 FacebookStrategy = require("passport-facebook").Strategy;
const findOrCreate = require("mongoose-findorcreate");
// const bcrypt = require("bcrypt");
// const saltRounds = 10;

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.connect(process.env.MONGODB_URI, {
  useNewUrlParser: true,
});

const userSchema = new mongoose.Schema({
  email: String,
  password: String,
  googleId: String,
  secrets: [String],
  facebookId: String,
});

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

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

passport.use(User.createStrategy());

passport.serializeUser(function (user, done) {
  done(null, user.id);
});

passport.deserializeUser(function (id, done) {
  User.findById(id, function (err, user) {
    done(err, user);
  });
});

passport.use(
  new GoogleStrategy(
    {
      clientID: process.env.CLIENT_ID,
      clientSecret: process.env.CLIENT_SECRET,
      callbackURL: "https://secret-things.herokuapp.com/auth/google/secrets",
    },
    function (accessToken, refreshToken, profile, cb) {
      User.findOrCreate({ googleId: profile.id }, function (err, user) {
        return cb(err, user);
      });
    }
  )
);

passport.use(
  new FacebookStrategy(
    {
      clientID: process.env.FACEBOOK_APP_ID,
      clientSecret: process.env.FACEBOOK_APP_SECRET,
      callbackURL: "https://secret-things.herokuapp.com/auth/facebook/secrets",
    },
    function (accessToken, refreshToken, profile, cb) {
      User.findOrCreate({ facebookId: profile.id }, function (err, user) {
        return cb(err, user);
      });
    }
  )
);

app.get("/", function (req, res) {
  res.render("home");
});

app.get(
  "/auth/facebook",
  passport.authenticate("facebook", { scope: "public_profile" })
);

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

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 to secrets.
    res.redirect("/secrets");
  }
);

app
  .route("/register")
  .get(function (req, res) {
    res.render("register");
  })
  .post(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
  .route("/login")
  .get(function (req, res) {
    res.render("login");
  })
  .post(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("/secrets", function (req, res) {
  if (req.isAuthenticated()) {
    User.find({ secrets: { $exists: true } }, function (err, foundUsers) {
      if (err) console.log(err);
      else {
        if (foundUsers) {
          res.render("secrets", { userWithSecrets: foundUsers });
        }
      }
    });
  } else {
    res.render("login");
  }
});

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, function (err, foundUser) {
    if (err) console.log(err);
    else {
      if (foundUser) {
        foundUser.secrets.push(submittedSecret);
        foundUser.save(function () {
          res.redirect("/secrets");
        });
      }
    }
  });
});

app.get("/logout", function (req, res) {
  req.logout();
  res.redirect("/");
});
app.listen(process.env.PORT || "3000", function () {
  console.log("server started on port 3000");
});