from djangoldp.serializers import LDPSerializer
from djangoldp.views import LDPViewSet
from djangoldp.pagination import LDPPagination


class LDPNotificationsPagination(LDPPagination):
    default_limit = 80


class LDPNotificationsViewSet(LDPViewSet):
    '''overridden LDPViewSet to force pagination'''
    pagination_class = LDPNotificationsPagination
    depth = 0

    def update(self, request, *args, **kwargs):
        instance = self.get_object()

        LDPSerializer.to_representation_cache.invalidate(instance.user.urlid)

        return super().update(request, *args, **kwargs)