main.py

import os
import random
from string import ascii_uppercase

from dotenv import load_dotenv
from flask import Flask, redirect, render_template, request, session, url_for
from flask_socketio import SocketIO, join_room, leave_room, send


app = Flask(__name__)

# Load environment variables from .env file
load_dotenv()

# Access the SECRET_KEY from the environment variables
app.config["SECRET_KEY"] = os.getenv("SECRET_KEY")

# Configure the SocketIO server to use the Flask application
socketio = SocketIO(app)
rooms = {}


def generate_unique_room_code(length):
    while True:
        code = ""

        for _ in range(length):
            code += random.choice(ascii_uppercase)

        if code not in rooms:
            break

    return code


@app.route("/", methods=["GET", "POST"])
def home():
    session.clear()
    if request.method == "POST":
        name = request.form.get("name")
        code = request.form.get("code")
        join = request.form.get("join", False)
        create = request.form.get("create", False)

        if not name:
            return render_template(
                "home.html", error="Please enter a name!", code=code, name=name
            )

        if join != False and not code:
            return render_template(
                "home.html", error="Please enter a room code!", code=code, name=name
            )

        room = code
        if create != False:
            room = generate_unique_room_code(4)
            rooms[room] = {"members": 0, "messages": []}
        elif code not in rooms:
            return render_template(
                "home.html", error="Room does not exist!", code=code, name=name
            )

        session["room"] = room
        session["name"] = name

        return redirect(url_for("room"))

    return render_template("home.html")


@app.route("/room")
def room():
    room = session.get("room")

    if room is None or session.get("name") is None or room not in rooms:
        return redirect(url_for("home"))

    return render_template("room.html", code=room, messages=rooms[room]["messages"])


@socketio.on("message")
def message(data):
    room = session.get("room")

    if room not in room:
        return

    content = {"name": session.get("name"), "message": data["data"]}
    send(content, to=room)
    rooms[room]["messages"].append(content)

    print(f"{session.get('name' )} said: {data['data']}")


@socketio.on("connect")
def connect(auth):
    room = session.get("room")
    name = session.get("name")

    if not room or not name:
        return

    if room not in rooms:
        leave_room(room)
        return

    join_room(room)
    send({"name": name, "message": "has entered the room"}, to=room)
    rooms[room]["members"] += 1
    print(f"{name} joined room {room}")


@socketio.on("disconnect")
def disconnect():
    room = session.get("room")
    name = session.get("name")
    leave_room(room)

    if room in rooms:
        rooms[room]["members"] -= 1
        if rooms[room]["members"] <= 0:
            del rooms[room]

    send({"name": name, "message": "has left the room"}, to=room)
    print(f"{name} left room {room}")


if __name__ == "__main__":
    socketio.run(app, debug=True)