app.js

const express = require('express');
const app = express();
const bcrypt = require('bcrypt');
const jwt = require('jsonwebtoken');
const crypto = require('crypto');
const path = require('path');
const userModel = require('./models/user');
const postModel = require('./models/post')
const cookieParser = require('cookie-parser');
const multer  = require('multer');
const { posts } = require('moongose/models');

app.set("view engine", "ejs");
app.use(express.json());
app.use(express.urlencoded({extended: true}));
app.use(cookieParser());

const storage = multer.diskStorage({
    destination: function (req, file, cb) {
      cb(null, './public/images/uploads')
    },
    filename: function (req, file, cb) {
      crypto.randomBytes(12 , function(err, bytes){
        const fn = bytes.toString("hex") + path.extname(file.originalname);
          cb(null, fn);
        
      })
    }
  })
  
  const upload = multer({ storage: storage })

app.get('/',function(req,res){
    res.render('index');
})

app.get('/file',function(req,res){
    res.render('file');
})

app.post('/upload', upload.single('file'),function(req,res){
    console.log(req.file);
    res.render('upload');
})

app.get('/login',function(req,res){
    res.render('login');
})

app.post('/register',async (req,res)=>{
    let {username, name, age, email, password} = req.body;

    let user =  await userModel.findOne({email})
    if(user) return res.status(500).send("User already created");

    bcrypt.genSalt(10, (err, salt) => {
        bcrypt.hash(password, salt, async (err, hash)=>{
            // console.log(hash)
            let user = await userModel.create({
                username,
                name,
                age,
                email,
                password:hash
            });

            let token = jwt.sign({email: email, userid: user._id}, "ahhahahah");
            res.cookie("token",token);
            res.send("Created...")
        });
    })
})

app.post('/login',async (req,res)=>{
    let {username, name, age, email, password} = req.body;

    let user =  await userModel.findOne({email})
    if(!user) return res.status(500).send("Something Went Wrong");

    bcrypt.compare(password, user.password, function(err, result){
        
        if(result) {
            let token = jwt.sign({email: email, userid: user._id}, "ahhahahah");
            res.cookie("token",token);
            res.status(200).redirect("profile");
        }
        else return res.redirect("/login")
    })
})


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

app.get('/profile', isLoggedIn , async function(req,res){
    let user = await userModel.findOne({email: req.user.email}).populate("posts");
    // console.log(user)
    
    res.render("profile", {user})
});

app.get('/like/:id', isLoggedIn , async function(req,res){
    let post = await postModel.findOne({_id: req.params.id}).populate("user");
    if(post.likes.indexOf(req.user.userid) === -1){
        post.likes.push(req.user.userid);
    }
    else{
        post.likes.splice(post.likes.indexOf(req.user.userid),1);
    }

    await post.save()
    res.redirect("/profile")
})


app.get('/edit/:id', isLoggedIn , async function(req,res){
    let post = await postModel.findOne({_id: req.params.id}).populate("user");

    res.render("edit", {post});
})


app.post('/update/:id', isLoggedIn , async function(req,res){
    let post = await postModel.findOneAndUpdate({_id: req.params.id}, {content: req.body.content});

    res.redirect("/profile");
})




app.post('/post', isLoggedIn , async function(req,res){
    let user = await userModel.findOne({email: req.user.email});
    // console.log(user)
    let {content} = req.body;
    let post = await postModel.create({
        user: user._id,
        content
    });
    user.posts.push(post._id);
    await user.save();
    res.redirect("/profile")
})







function isLoggedIn(req,res, next){
    if (req.cookies.token === "") {
        res.redirect("/login")
    }
    else{
        let data = jwt.verify(req.cookies.token, "ahhahahah");
        req.user = data;
        next();
    }
}

app.listen(3000);