102 lines
3.8 KiB
Python
102 lines
3.8 KiB
Python
from typing import Any, Dict, Iterable, List, Optional # noqa
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from ..utils.access_permissions import BaseAccessPermissions
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from ..utils.auth import has_perm
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from ..utils.collection import CollectionElement
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class ItemAccessPermissions(BaseAccessPermissions):
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"""
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Access permissions container for Item and ItemViewSet.
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"""
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def check_permissions(self, user):
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"""
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Returns True if the user has read access model instances.
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"""
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return has_perm(user, 'agenda.can_see')
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def get_serializer_class(self, user=None):
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"""
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Returns serializer class.
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"""
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from .serializers import ItemSerializer
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return ItemSerializer
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# TODO: In the following method we use full_data['is_hidden'] but this can be out of date.
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def get_restricted_data(
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self,
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full_data: List[Dict[str, Any]],
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user: Optional[CollectionElement]) -> List[Dict[str, Any]]:
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"""
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Returns the restricted serialized data for the instance prepared
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for the user.
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We remove comments for non admins/managers and a lot of fields of
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hidden items for users without permission to see hidden items.
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"""
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def filtered_data(full_data, blocked_keys):
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"""
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Returns a new dict like full_data but with all blocked_keys removed.
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"""
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whitelist = full_data.keys() - blocked_keys
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return {key: full_data[key] for key in whitelist}
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# Parse data.
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if has_perm(user, 'agenda.can_see'):
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if has_perm(user, 'agenda.can_manage') and has_perm(user, 'agenda.can_see_hidden_items'):
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# Managers with special permission can see everything.
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data = full_data
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elif has_perm(user, 'agenda.can_see_hidden_items'):
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# Non managers with special permission can see everything but comments.
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blocked_keys = ('comment',)
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data = [filtered_data(full, blocked_keys) for full in full_data]
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else:
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# Users without special permissin for hidden items.
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# In hidden case managers and non managers see only some fields
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# so that list of speakers is provided regardless.
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blocked_keys_hidden_case = set(full_data[0].keys()) - set((
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'id',
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'title',
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'speakers',
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'speaker_list_closed',
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'content_object'))
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# In non hidden case managers see everything and non managers see
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# everything but comments.
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if has_perm(user, 'agenda.can_manage'):
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blocked_keys_non_hidden_case = [] # type: Iterable[str]
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else:
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blocked_keys_non_hidden_case = ('comment',)
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data = []
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for full in full_data:
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if full['is_hidden']:
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data.append(filtered_data(full, blocked_keys_hidden_case))
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else:
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data.append(filtered_data(full, blocked_keys_non_hidden_case))
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else:
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data = []
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return data
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def get_projector_data(self, full_data: List[Dict[str, Any]]) -> List[Dict[str, Any]]:
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"""
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Returns the restricted serialized data for the instance prepared
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for the projector. Removes field 'comment'.
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"""
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def filtered_data(full_data, blocked_keys):
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"""
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Returns a new dict like full_data but with all blocked_keys removed.
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"""
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whitelist = full_data.keys() - blocked_keys
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return {key: full_data[key] for key in whitelist}
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# Parse data.
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blocked_keys = ('comment',)
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data = [filtered_data(full, blocked_keys) for full in full_data]
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return data
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