from django.utils import timezone from users.models import Identity, User class IdentityMiddleware: """ Adds a request.identity object which is either the current session's identity, or None if they have not picked one yet/it's invalid. """ def __init__(self, get_response): self.get_response = get_response def __call__(self, request): # The API middleware might have set identity already if not hasattr(request, "identity"): # See if we have one in the session identity_id = request.session.get("identity_id") if not identity_id: request.identity = None else: # Pull it out of the DB and assign it try: request.identity = Identity.objects.get(id=identity_id) User.objects.filter(pk=request.user.pk).update( last_seen=timezone.now() ) except Identity.DoesNotExist: request.identity = None response = self.get_response(request) if request.user: response.headers["X-Takahe-User"] = str(request.user) if request.identity: response.headers["X-Takahe-Identity"] = str(request.identity) return response