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72 lines
2.5 KiB
Python
72 lines
2.5 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from .room import (
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RoomMemberEvent, RoomJoinRulesEvent, RoomPowerLevelsEvent,
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RoomAddStateLevelEvent, RoomSendEventLevelEvent, RoomOpsPowerLevelsEvent,
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RoomAliasesEvent, RoomCreateEvent,
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)
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def prune_event(event):
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""" Prunes the given event of all keys we don't know about or think could
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potentially be dodgy.
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This is used when we "redact" an event. We want to remove all fields that
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the user has specified, but we do want to keep necessary information like
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type, state_key etc.
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"""
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return _prune_event_or_pdu(event.type, event)
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def prune_pdu(pdu):
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"""Removes keys that contain unrestricted and non-essential data from a PDU
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"""
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return _prune_event_or_pdu(pdu.pdu_type, pdu)
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def _prune_event_or_pdu(event_type, event):
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# Remove all extraneous fields.
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event.unrecognized_keys = {}
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new_content = {}
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def add_fields(*fields):
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for field in fields:
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if field in event.content:
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new_content[field] = event.content[field]
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if event_type == RoomMemberEvent.TYPE:
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add_fields("membership")
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elif event_type == RoomCreateEvent.TYPE:
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add_fields("creator")
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elif event_type == RoomJoinRulesEvent.TYPE:
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add_fields("join_rule")
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elif event_type == RoomPowerLevelsEvent.TYPE:
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# TODO: Actually check these are valid user_ids etc.
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add_fields("default")
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for k, v in event.content.items():
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if k.startswith("@") and isinstance(v, (int, long)):
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new_content[k] = v
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elif event_type == RoomAddStateLevelEvent.TYPE:
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add_fields("level")
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elif event_type == RoomSendEventLevelEvent.TYPE:
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add_fields("level")
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elif event_type == RoomOpsPowerLevelsEvent.TYPE:
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add_fields("kick_level", "ban_level", "redact_level")
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elif event_type == RoomAliasesEvent.TYPE:
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add_fields("aliases")
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event.content = new_content
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return event
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