old_contents: from django.views.generic import View
  from django.http import JsonResponse
  from django.views.decorators.csrf import csrf_exempt
  from django.utils.decorators import method_decorator
  
  from .forms import SubscribeForm, UnsubscribeForm, ConfirmEmailForm
  from . import user_service
  
  
  class SubscribeView(View):
      form_class = SubscribeForm
  
      @method_decorator(csrf_exempt)
      def dispatch(self, request, *args, **kwargs):
          return super(SubscribeView, self).dispatch(request, *args, **kwargs)
  
      def post(self, request):
          form = self.form_class(request.POST)
          if form.is_valid():
              email = form.cleaned_data['email']
              tags = form.cleaned_data['tags']
              user = user_service.get_or_create_user(email=email)
              is_updated = user_service.update_user_tags(user=user, tags=tags)
              if is_updated:
                  key = user_service.generate_key(user=user)
                  user_service.send_confirmation_email(
                      request=request, user=user, key=key)
                  return JsonResponse({'success': key})
              return JsonResponse({'success': False})
  
  
  class UnsubscribeView(View):
  
      form_class = UnsubscribeForm
  
      @method_decorator(csrf_exempt)
      def dispatch(self, request, *args, **kwargs):
          return super(UnsubscribeView, self).dispatch(request, *args, **kwargs)
  
      def post(self, request):
          form = self.form_class(request.POST)
          if form.is_valid():
              email = form.cleaned_data['email']
              user = user_service.get_user(email=email)
              if not user:
                  return JsonResponse({'success': False})
              return JsonResponse({'success': True})
  
  
  class ConfirmEmailView(View):
  
      form_class = ConfirmEmailForm
  
      def get(self, request):
          form = self.form_class(request.GET)
          if form.is_valid():
              if form.cleaned_data['subscribe']:
                  return JsonResponse({'status': 'Subscribed'})
              else:
                  return JsonResponse({'status': 'Unsubscribed'})
          return JsonResponse({'success': form.errors})
  
new_contents: from django.views.generic import View
  from django.http import JsonResponse
  from django.views.decorators.csrf import csrf_exempt
  from django.utils.decorators import method_decorator
  
  from .forms import SubscribeForm, UnsubscribeForm, ConfirmEmailForm
  from . import user_service
  
  
  class SubscribeView(View):
      form_class = SubscribeForm
  
      @method_decorator(csrf_exempt)
      def dispatch(self, request, *args, **kwargs):
          return super(SubscribeView, self).dispatch(request, *args, **kwargs)
  
      def post(self, request):
          form = self.form_class(request.POST)
          if form.is_valid():
              email = form.cleaned_data['email']
              tags = form.cleaned_data['tags']
              user = user_service.get_or_create_user(email=email)
              is_updated = user_service.update_user_tags(user=user, tags=tags)
              if is_updated:
                  key = user_service.generate_key(user=user)
                  user_service.send_confirmation_email(
                      request=request, user=user, key=key)
                  return JsonResponse({'status': 'Email sent'})
              return JsonResponse({'status': 'No tags updated'})
          return JsonResponse({'errors': form.errors})
  
  
  class UnsubscribeView(View):
  
      form_class = UnsubscribeForm
  
      @method_decorator(csrf_exempt)
      def dispatch(self, request, *args, **kwargs):
          return super(UnsubscribeView, self).dispatch(request, *args, **kwargs)
  
      def post(self, request):
          form = self.form_class(request.POST)
          if form.is_valid():
              email = form.cleaned_data['email']
              user = user_service.get_user(email=email)
              if not user:
                  return JsonResponse({'error': 'User Not Found'})
              key = user_service.generate_key(user=user, for_subscription=False)
              user_service.send_confirmation_email(
                  request=request, user=user, key=key, for_subscription=False)
              return JsonResponse({'status': 'Email sent'})
          return JsonResponse({'errors': form.errors})
  
  
  class ConfirmEmailView(View):
  
      form_class = ConfirmEmailForm
  
      def get(self, request):
          form = self.form_class(request.GET)
          if form.is_valid():
              is_subscribed = form.cleaned_data['subscribe']
              user = form.cleaned_data['user']
              user_service.update_subscription(user=user, status=is_subscribed)
              if is_subscribed:
                  return JsonResponse({'status': 'Subscribed'})
              else:
                  return JsonResponse({'status': 'Unsubscribed'})
          return JsonResponse({'errors': form.errors})
  
subject: Update views to send proper responses