app-L2.js

//jshint esversion:6
require('dotenv').config();
const express=require("express");
const bodyParser= require("body-parser");
const ejs=require("ejs");
const mongoose=require("mongoose");
const encrypt=require("mongoose-encryption");
/*This mongoose-encrypt works by encrypting the 
data on save and decrypt the data when we use find*/
const app= express();

const secret=process.env.SECRET;

app.use(express.static("public"));
app.set("view engine","ejs");
app.use(bodyParser.urlencoded({extended:true}));


mongoose.connect("mongodb://localhost:27017/userDB");

const userSchema = new mongoose.Schema({     //this is a proper mongoose schema.
    email:{type:String, required:true},
    password:{type:String, required:true}
 });


userSchema.plugin (encrypt,{secret:secret , encryptedFields:["password"]});  //This is a plugin, it should be placed before defining model
//we dont want to encrypt our entire model, therefore we added only password in encrypted feilds. 
 const User = new mongoose.model("User",userSchema);

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

app.get("/login",(req,res)=>{
    res.render("login");
});

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

app.post("/register",(req,res)=>{
    const newUser=new User({
        email:req.body.username,
        password:req.body.password
    });
    newUser.save((err)=>{
        if(err){
            console.log(err);
        }else{
            res.render("secrets");
        }
    });
});

app.post("/login", (req,res)=>{
    const username=req.body.username;
    const password=req.body.password;

    User.findOne({email:username},(err,foundUser)=>{
        if(err){
            console.log(err);
        }else{
            if(foundUser){
                if(foundUser.password===password){
                    res.render("secrets");
                }
            }
        }
    })
})



 










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