app.py

import flask
import flask_cors
import uuid

rooms = {}

app = flask.Flask(__name__)
flask_cors.CORS(app)


@app.route('/')
def index():
    return flask.render_template('index.html')

@app.route('/createRoom', methods=['POST'])
def create_room():
    roomId = flask.request.get_json()['roomIdInput']

    success = True
    
    for room in rooms:
        if room == roomId:
            success = False
    if success:      
        rooms.update = {roomId: {}}  # Create an empty room with an empty message list
        return flask.jsonify({'roomId': roomId, "success": True})
    else:
        return flask.jsonify({"success": False})

@app.route('/postMessage', methods=['POST'])
def post():
    nameIn = flask.request.get_json()['nameInput']
    messageIn = flask.request.get_json()['messageInput']
    roomidIn = flask.request.get_json()['roomIdInput']
    
    n = len(rooms[roomidIn])+1
    rooms[roomidIn].update({"message"+str(n): {"name": nameIn, "message": messageIn}})
    
    return flask.jsonify({"success": True})

@app.route('/messages', methods=['POST'])
def messages():
    roomidInput = flask.request.get_json()['roomIdInput']
    if roomidInput in rooms:
        return flask.jsonify(rooms[roomidInput])
    else:
        return flask.jsonify({"message": "room does not exist"})


if __name__ == "__main__":
    app.run(debug=True,host="0.0.0.0",port=5000)