assignment-app1/Router.js at master · samdevlops/assignment-app1 · GitHub

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const bcrypt = require('bcrypt');
class Router{

    constructor(app, db){
        this.login(app, db);
        this.logout(app, db);
        this.isLoggedIn(app, db);
    }

    login(app, db){

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

            username = username.toLowerCase();

            if(username.length > 12 || password.length > 12){
                res.json({
                    success:false,
                    msg: 'An error occured, Plz try again.'
                });
                return;
            }

            var cols = [username];
            db.query('SELECT * FROM user WHERE username =? LIMIT 1', cols, (err, data, fields) => {

                if(err){
                    res.json({
                        success:false,
                        msg: 'An error occured, Plz try again.'
                    });
                    return;
                }

                if(data && data.length === 1){

                    bcrypt.compare(password, data[0].password, (bcryptErr, verified) => {

                        if(verified){
                            req.session.userID = data[0].id;

                            res.json({
                                success:false,
                                username: data[0].username
                            });
                            return;
                        }
                        else{
                            res.json({
                                success:false,
                                msg: 'Invalid Password. Plz try again.'
                            });
                            return;
                        }

                    });

                }
                else{
                    res.json({
                        success:false,
                        msg: 'User Not Found. Plz try again.'
                    });
                    return;
                }

            });

        });

    }

    logout(app, db){

        app.post('/logout', (req, res) => {

            if(req.session.userID){
                req.session.destroy();
                res.json({
                    success:true
                })
                return true;
            }
            else{
                res.json({
                    success:false
                })
                return false;
            }

        });

    }

    isLoggedIn(app, db){

        app.post('/isLoggedIn', (req, res) =>{

            if(req.session.userID){
                var cols = [req.session.userID];
                db.query('SELECT * FROM user WHERE id = ? LIMIT 1', cols, (err, data, fields) => {

                    if(data && data.length === 1){
                        res.json({
                            success:true,
                            username: data[0].username
                        })

                        return true;
                    }
                    else{
                        res.json({
                            success:true
                        })
                    }
                });
            }
            else{
                res.json({
                    success:false
                })
            }

        });

    }
}

module.exports = Router;