OpenSlides/openslides/agenda/access_permissions.py

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from typing import Any, Dict, Iterable, List, Optional # noqa
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from ..utils.access_permissions import BaseAccessPermissions
from ..utils.auth import has_perm
from ..utils.collection import CollectionElement
class ItemAccessPermissions(BaseAccessPermissions):
"""
Access permissions container for Item and ItemViewSet.
"""
def check_permissions(self, user):
"""
Returns True if the user has read access model instances.
"""
return has_perm(user, 'agenda.can_see')
def get_serializer_class(self, user=None):
"""
Returns serializer class.
"""
from .serializers import ItemSerializer
return ItemSerializer
# TODO: In the following method we use full_data['is_hidden'] and
# full_data['is_internal'] but this can be out of date.
def get_restricted_data(
self,
full_data: List[Dict[str, Any]],
user: Optional[CollectionElement]) -> List[Dict[str, Any]]:
"""
Returns the restricted serialized data for the instance prepared
for the user.
Hidden items can only be seen by managers with can_manage permission.
We remove comments for non admins/managers and a lot of fields of
internal items for users without permission to see internal items.
"""
def filtered_data(full_data, blocked_keys):
"""
Returns a new dict like full_data but with all blocked_keys removed.
"""
whitelist = full_data.keys() - blocked_keys
return {key: full_data[key] for key in whitelist}
# Parse data.
if full_data and has_perm(user, 'agenda.can_see'):
if has_perm(user, 'agenda.can_manage') and has_perm(user, 'agenda.can_see_internal_items'):
# Managers with special permission can see everything.
data = full_data
elif has_perm(user, 'agenda.can_see_internal_items'):
# Non managers with special permission can see everything but
# comments and hidden items.
data = [full for full in full_data if not full['is_hidden']] # filter hidden items
blocked_keys = ('comment',)
data = [filtered_data(full, blocked_keys) for full in data] # remove blocked_keys
else:
# Users without special permission for internal items.
# In internal and hidden case managers and non managers see only some fields
# so that list of speakers is provided regardless. Hidden items can only be seen by managers.
# We know that full_data has at least one entry which can be used to parse the keys.
blocked_keys_internal_hidden_case = set(full_data[0].keys()) - set((
'id',
'title',
'speakers',
'speaker_list_closed',
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'content_object'))
# In non internal case managers see everything and non managers see
# everything but comments.
if has_perm(user, 'agenda.can_manage'):
blocked_keys_non_internal_hidden_case = [] # type: Iterable[str]
can_see_hidden = True
else:
blocked_keys_non_internal_hidden_case = ('comment',)
can_see_hidden = False
data = []
for full in full_data:
if full['is_hidden'] and can_see_hidden:
# Same filtering for internal and hidden items
data.append(filtered_data(full, blocked_keys_internal_hidden_case))
elif full['is_internal']:
data.append(filtered_data(full, blocked_keys_internal_hidden_case))
else: # agenda item
data.append(filtered_data(full, blocked_keys_non_internal_hidden_case))
else:
data = []
return data
def get_projector_data(self, full_data: List[Dict[str, Any]]) -> List[Dict[str, Any]]:
"""
Returns the restricted serialized data for the instance prepared
for the projector. Removes field 'comment'.
"""
def filtered_data(full_data, blocked_keys):
"""
Returns a new dict like full_data but with all blocked_keys removed.
"""
whitelist = full_data.keys() - blocked_keys
return {key: full_data[key] for key in whitelist}
# Parse data.
blocked_keys = ('comment',)
data = [filtered_data(full, blocked_keys) for full in full_data]
return data