app.js

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 app = express();

// For time-stamp in chat.

function timestamp() {
    let d = new Date();
    let ISTTime = new Date(d.getTime() + (330 + d.getTimezoneOffset()) * 60000);
    let timeStamp = `[${['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'][ISTTime.getDay()]} ${ISTTime.getHours() % 12 || 12}:${ISTTime.getMinutes()} ${ISTTime.getHours() >= 12 ? "PM" : "AM"} ${d.getDate()}/${d.getMonth() + 1}/${d.getFullYear()} IST]`;
    return timeStamp;
}



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

app.use(session({
    secret: process.env.SECRET_KEY,
    resave: false,
    saveUninitialized: false
    // cookie: { secure: true }
}));

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

mongoose.connect(`mongodb+srv://admin_subhranshu:${process.env.DB_KEY}@cluster0.one0j.mongodb.net/anonymousChat`);

const userSkeliton = new mongoose.Schema({
    email: String,
    password: String
}); // schema

const roomSchema = new mongoose.Schema({
    roomname: String,
    password: String,
    messages: [String],

});


userSkeliton.plugin(passportLocalMongoose);


const Room = new mongoose.model("room", roomSchema);
const User = new mongoose.model("user", userSkeliton);

passport.use(User.createStrategy());

passport.serializeUser(User.serializeUser());
passport.deserializeUser(User.deserializeUser());

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

app.use((req, res, next) => { res.header({ "Access-Control-Allow-Origin": "*" }); next(); })

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

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

app.get("/room", (req, res) => {

    if (req.isAuthenticated()) {
        res.render("room", { username: req.user.username });
    } else {
        res.redirect("/login");
    }
});

app.get("/logout", (req, res) => {
    req.logout((err) => {
        if (err) {
            console.log(err);
            res.send("Something went wrong! Kindy retry or conatct subhranshu choudhury.")
        } else {
            res.redirect("/");

        }
    });
});

app.post("/register", (req, res) => {

    User.register({ username: req.body.username }, req.body.password, (err, u) => {
        if (err) {
            console.log(err);
            res.redirect("/register");
        } else {
            passport.authenticate("local")(req, res, () => {
                res.redirect("/room");
            });
        }
    });


});

app.post("/login", (req, res) => {
    const user = new User({
        username: req.body.username,
        password: req.body.password
    });

    req.login(user, (err) => {
        if (err) {
            console.log(err);
        } else {
            passport.authenticate("local")(req, res, () => {
                res.redirect("/room");
            });
        }
    });

});

// ROOM 

app.get("/create-room", (req, res) => {
    if (req.isAuthenticated()) {
        res.render("create-room");
    } else {
        res.redirect("/login");
    }
})

app.post("/create-room", (req, res) => {
    const newRoom = new Room({
        roomname: req.body.roomname,
        password: req.body.password
    });

    newRoom.save((err) => {
        if (err) {
            res.send(err);
        } else {
            res.redirect("/join-room");
        }

    });
});



app.get("/chat/:roomName/:roomPassword", (req, res) => {
    if (req.isAuthenticated()) {
        Room.findOne({ roomname: req.params.roomName, password: req.params.roomPassword }, (err, message) => {
            if (message) {
                const userMessage = message.messages;
                res.render("chat", { roomName: req.params.roomName, roomPassword: req.params.roomPassword, userMessage: userMessage });

            } else {
                if (err) {
                    res.send(err);
                } else {
                    res.render("result", { message: "Room has been deleted or not found." });
                }
            }
        });

    } else {
        res.redirect("/login");
    }
});

app.post("/chat/:roomName/:roomPassword", (req, res) => {

    if (req.isAuthenticated()) {
        const message = req.body.message;
        const username = req.user.username;
        Room.updateOne({ roomname: req.params.roomName, password: req.params.roomPassword }, { $push: { messages: `${timestamp()}<br><i>[${username}]</i> :- <b>${message}</b>` } }, (err) => {
            if (err) {
                res.send(err);
            } else {
                res.redirect(`/chat/${req.params.roomName}/${req.params.roomPassword}`);

            }
        });
    } else {
        res.redirect("/login");
    }


});

app.get("/join-room", (req, res) => {
    if (req.isAuthenticated()) {
        res.render("join-room");
    } else {
        res.redirect("login");
    }
});

app.post("/join-room", (req, res) => {
    if (req.isAuthenticated()) {
        const roomname = req.body.roomname;
        const password = req.body.password;
        Room.findOne({ roomname: roomname, password: password }, (err, foundRoom) => {
            if (foundRoom) {
                res.redirect(`/chat/${roomname}/${password}`);

            } else {
                if (err) {
                    res.send(err);
                } else {
                    res.render("result", { message: "Room Name or Room Password mismatched. Kindly Recheck." });
                }
            }
        });

        ;
    } else {
        res.redirect("login");
    }
});

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

app.post("/delete-room", (req, res) => {
    const roomName = req.body.roomName;
    const roomPassword = req.body.roomPassword;

    Room.deleteOne({ roomname: roomName, password: roomPassword }, (err) => {
        if (err) {
            res.send(err);
        } else {
            res.render("result", { message: "Room has been deleted successfully." })
        }
    })
})

app.get("/messages/:roomName/:roomPassword", (req, res) => {
    const roomName = req.params.roomName;
    const roomPassword = req.params.roomPassword;

    Room.findOne({ roomname: roomName, password: roomPassword }, (err, message) => {
        if (message) {
            res.send(message.messages);

        } else {
            if (err) {
                res.send(err);
            } else {
                res.render("result", { message: "No room matched. Recheck Room Name & Room Password." });
            }
        }
    });
});



app.listen(process.env.PORT || 3000, () => {
    console.log("===> Live at port 3000")
});