from ..utils.access_permissions import BaseAccessPermissions class ProjectorAccessPermissions(BaseAccessPermissions): """ Access permissions container for Projector and ProjectorViewSet. """ def check_permissions(self, user): """ Returns True if the user has read access model instances. """ return user.has_perm('core.can_see_projector') def get_serializer_class(self, user=None): """ Returns serializer class. """ from .serializers import ProjectorSerializer return ProjectorSerializer class TagAccessPermissions(BaseAccessPermissions): """ Access permissions container for Tag and TagViewSet. """ def check_permissions(self, user): """ Returns True if the user has read access model instances. """ from .config import config # Every authenticated user can retrieve tags. Anonymous users can do # so if they are enabled. return user.is_authenticated() or config['general_system_enable_anonymous'] def get_serializer_class(self, user=None): """ Returns serializer class. """ from .serializers import TagSerializer return TagSerializer class ChatMessageAccessPermissions(BaseAccessPermissions): """ Access permissions container for ChatMessage and ChatMessageViewSet. """ def check_permissions(self, user): """ Returns True if the user has read access model instances. """ # Anonymous users can see the chat if the anonymous group has the # permission core.can_use_chat. But they can not use it. See views.py. return user.has_perm('core.can_use_chat') def get_serializer_class(self, user=None): """ Returns serializer class. """ from .serializers import ChatMessageSerializer return ChatMessageSerializer class ConfigAccessPermissions(BaseAccessPermissions): """ Access permissions container for the config (ConfigStore and ConfigViewSet). """ def check_permissions(self, user): """ Returns True if the user has read access model instances. """ from .config import config # Every authenticated user can see the metadata and list or retrieve # the config. Anonymous users can do so if they are enabled. return user.is_authenticated() or config['general_system_enable_anonymous'] def get_full_data(self, instance): """ Returns the serlialized config data. """ from .config import config from .models import ConfigStore # Attention: The format of this response has to be the same as in # the retrieve method of ConfigViewSet. if isinstance(instance, ConfigStore): result = {'key': instance.key, 'value': config[instance.key]} else: # It is possible, that the caching system already sends the correct data as "instance". result = instance return result