app.js

//jshint esversion:6
require('dotenv').config();
const ejs = require("ejs");
const express = require("express");
const bodyParser = require("body-parser");
const mongoose = require("mongoose");
// const encrypt = require("mongoose-encryption");
// const md5 = require("md5");
// const bcrypt = require("bcrypt");
// const saltRounds = 10;
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.set('view engine', 'ejs');
app.use(bodyParser.urlencoded({extended: true}));
app.use(express.static("public"));

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

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

mongoose.connect("mongodb://localhost:27017/userDB", {useNewUrlParser: true});
// mongoose.set("useCreateIndex", true);

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

userSchema.plugin(passportLocalMongoose);
userSchema.plugin(findOrCreate);
// userSchema.plugin(encrypt, {secret:process.env.SECRETS, encryptedFields: ["password"]});

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: "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("/login", function(req,res){
    res.render("login");
});

app.get("/logout", function(req,res){
    req.logout();
    res.redirect("/");
});

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

app.get("/auth/google/secrets", 
    passport.authenticate('google', {failureRedirect:"/login"}),
    function(req,res){
        res.redirect("/secrets"); 
    }
); 

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

app.post("/submit", function(req,res){
    submittedSecret = req.body.secret;
    User.findById(req.user.id, function(err, foundUser){
        if(err){
            console.log(err);
        } else {
            if(foundUser){
                foundUser.secret = submittedSecret;
                foundUser.save(function(err){
                    if(!err){
                        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");
            }); 
        }
    });

    // User.findOne({email:username}, function(err, foundUser){
    //     if(err){
    //         console.log(err);
    //     } else {
    //         if(foundUser){
    //             bcrypt.compare(password, foundUser.password, function(err,result){
    //                 if(result==true){
    //                     res.render("secrets");
    //                 } else {
    //                     res.send("Password is not matching.Please try again");
    //                 }
    //             });
    //         } else {
    //             res.send("This email does not exist");
    //         }
    //     }
    // })
})

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

app.get("/secrets", function(req,res){
    User.find({"secret": {$ne: null}}, function(err, foundUsers){
        if(err){
            console.log(err);
        } else {
            res.render("secrets", {usersWithSecrets: foundUsers});
        }
    });
    // if(req.isAuthenticated()){
    //     res.render("secrets");
    // } else {
    //     res.redirect("/login");
    // }
});

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");
            });
        }
    });

    // bcrypt.hash(req.body.password, saltRounds, function(err, hash){
    //     const newUser = new User({
    //         email: req.body.username,
    //         password: hash
    //     });
    
    //     newUser.save(function(err){
    //         if(!err){
    //             res.render("secrets");
    //         }
    //     }); 
    // });
});


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