feat: Add real-time quiz lobby functionality

- Implement WebSocket-based lobby system for quiz participants
- Add lobby page with real-time participant updates
- Create LobbyConsumer for WebSocket communication
- Add routing configuration for WebSocket connections
- Update requirements with WebSocket dependencies
- Add development and production server documentation

This change enables real-time quiz lobbies where participants can
join and wait for the quiz to start, with instant updates for all
connected users.

django/play/views.py

@@ -2,34 +2,52 @@ from django.shortcuts import render
 from django.shortcuts import render, redirect, get_object_or_404, reverse
 from play.models import QuizGame, QuizGameParticipant
 from library.models import QivipQuiz, QivipQuestion
-from django.http import HttpResponseRedirect
+from django.http import HttpResponseRedirect, HttpResponseNotFound
 
 import json
 
 # Create your views here.
 def lobby(request, join_code):
-    if not "participant_id" in request.COOKIES:
-        return redirect('play:create_participant', join_code=join_code)
-    participant_id = request.COOKIES['participant_id']
     quiz_game = get_object_or_404(QuizGame, join_code=join_code)
     quiz = get_object_or_404(QivipQuiz, pk=quiz_game.quiz_id.id)
-    participant = get_object_or_404(QuizGameParticipant, participant_id=participant_id)
-
-    if not participant.quiz_game.join_code == join_code:
-        participant.quiz_game = quiz_game
-        participant.save()
-
     context = {
-        'debug': "test", 
-        'participant': participant,
         'quiz': quiz,
+        'quiz_game': quiz_game,
     }
-    
+
+    if "host_id" in request.COOKIES:
+        host_id = request.COOKIES['host_id']
+        if host_id == quiz_game.host_id:
+            context['host_id'] = host_id
+            return render(request, 'play/lobby.html', context=context)
+
+    if not "participant_id" in request.COOKIES:
+        return redirect('play:create_participant', join_code=join_code)
+
+    participant_id = request.COOKIES['participant_id']
+    try:
+        participant = QuizGameParticipant.objects.get(participant_id=participant_id)
+        if not participant.quiz_game.join_code == join_code: # Teilnehmer dem richtigen Spiel hinzufügen
+            participant.quiz_game = quiz_game
+            participant.save()
+    except QuizGameParticipant.DoesNotExist:
+        return redirect('play:create_participant', join_code=join_code)
+
+    context['participant'] = participant
     return render(request, 'play/lobby.html', context=context)
 
 def create_participant(request, join_code):
-    if "participant_id" in request.COOKIES: # Umleiten, falls Teilnehmer bereits erstellt
-        return redirect('play:lobby', join_code=join_code)
+    if "participant_id" in request.COOKIES:
+        # Prüfe ob der Teilnehmer noch existiert
+        participant_id = request.COOKIES['participant_id']
+        try:
+            participant = QuizGameParticipant.objects.get(participant_id=participant_id)
+            return redirect('play:lobby', join_code=join_code)
+        except QuizGameParticipant.DoesNotExist:
+            # Cookie löschen wenn Teilnehmer nicht mehr existiert
+            response = HttpResponseRedirect(request.path)
+            response.delete_cookie('participant_id')
+            return response
     if request.method == 'POST':
         display_name = request.POST.get('display_name')
         join_code = request.POST.get('join_code')
@@ -50,6 +68,22 @@ def create_participant(request, join_code):
 
     return render(request, 'play/initialize_participant.html', {'join_code': join_code})
 
+def create_game(request, quiz_id):
+    try:
+        quiz = QivipQuiz.objects.get(id=quiz_id)
+        game = QuizGame()
+        game.quiz_id = quiz
+        game.host_id = game.generate_unique_id()
+        game.save()
+
+        response = HttpResponseRedirect(reverse('play:lobby', kwargs={'join_code': game.join_code}))
+        response.set_cookie('host_id', game.host_id, max_age=3600)
+        
+        return response
+    except QivipQuiz.DoesNotExist:
+        return HttpResponseNotFound("Quiz nicht gefunden")
+    
+
 def join_game(request):
     if request.method == 'POST':
         join_code = request.POST.get('game_code')