6abb0976c2
* Second websocket channel for the projector * Removed use of projector requirements for REST API requests. Refactored data serializing for projector websocket connection. * Refactor the way that the projector autoupdate get its data. * Fixed missing assignment slide title for hidden items. * Release all items for item list slide and list of speakers slide. Fixed error with motion workflow. * Created CollectionElement class which helps to handle autoupdate.
86 lines
2.9 KiB
Python
86 lines
2.9 KiB
Python
from django.dispatch import Signal
|
|
|
|
from .dispatch import SignalConnectMetaClass
|
|
|
|
|
|
class BaseAccessPermissions(object, metaclass=SignalConnectMetaClass):
|
|
"""
|
|
Base access permissions container.
|
|
|
|
Every app which has autoupdate models has to create classes subclassing
|
|
from this base class for every autoupdate root model. Each subclass has
|
|
to have a globally unique name. The metaclass (SignalConnectMetaClass)
|
|
does the rest of the magic.
|
|
"""
|
|
signal = Signal()
|
|
|
|
def __init__(self, **kwargs):
|
|
"""
|
|
Initializes the access permission instance. This is done when the
|
|
signal is sent.
|
|
|
|
Because of Django's signal API, we have to take wildcard keyword
|
|
arguments. But they are not used here.
|
|
"""
|
|
pass
|
|
|
|
@classmethod
|
|
def get_dispatch_uid(cls):
|
|
"""
|
|
Returns the classname as a unique string for each class. Returns None
|
|
for the base class so it will not be connected to the signal.
|
|
"""
|
|
if not cls.__name__ == 'BaseAccessPermissions':
|
|
return cls.__name__
|
|
|
|
def check_permissions(self, user):
|
|
"""
|
|
Returns True if the user has read access to model instances.
|
|
"""
|
|
return False
|
|
|
|
def get_serializer_class(self, user=None):
|
|
"""
|
|
Returns different serializer classes according to users permissions.
|
|
|
|
This should return the serializer for full data access if user is
|
|
None. See get_full_data().
|
|
"""
|
|
raise NotImplementedError(
|
|
"You have to add the method 'get_serializer_class' to your "
|
|
"access permissions class.".format(self))
|
|
|
|
def get_full_data(self, instance):
|
|
"""
|
|
Returns all possible serialized data for the given instance.
|
|
"""
|
|
return self.get_serializer_class(user=None)(instance).data
|
|
|
|
def get_restricted_data(self, full_data, user):
|
|
"""
|
|
Returns the restricted serialized data for the instance prepared
|
|
for the user.
|
|
|
|
Returns None if the user has no read access. Returns reduced data
|
|
if the user has limited access. Default: Returns full data if the
|
|
user has read access to model instances.
|
|
|
|
Hint: You should override this method if your get_serializer_class()
|
|
method returns different serializers for different users or if you
|
|
have access restrictions in your view or viewset in methods like
|
|
retrieve(), list() or check_object_permissions().
|
|
"""
|
|
if self.check_permissions(user):
|
|
data = full_data
|
|
else:
|
|
data = None
|
|
return data
|
|
|
|
def get_projector_data(self, full_data):
|
|
"""
|
|
Returns the serialized data for the projector. Returns None if has no
|
|
access to this specific data. Returns reduced data if the user has
|
|
limited access. Default: Returns full data.
|
|
"""
|
|
return full_data
|