mirror of
https://git.anonymousland.org/anonymousland/synapse.git
synced 2024-10-01 11:49:51 -04:00
148 lines
4.7 KiB
Python
148 lines
4.7 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014-2016 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 frozendict import frozendict
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class EventContext(object):
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"""
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Attributes:
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current_state_ids (dict[(str, str), str]):
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The current state map including the current event.
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(type, state_key) -> event_id
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prev_state_ids (dict[(str, str), str]):
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The current state map excluding the current event.
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(type, state_key) -> event_id
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state_group (int|None): state group id, if the state has been stored
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as a state group. This is usually only None if e.g. the event is
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an outlier.
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rejected (bool|str): A rejection reason if the event was rejected, else
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False
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push_actions (list[(str, list[object])]): list of (user_id, actions)
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tuples
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prev_group (int): Previously persisted state group. ``None`` for an
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outlier.
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delta_ids (dict[(str, str), str]): Delta from ``prev_group``.
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(type, state_key) -> event_id. ``None`` for an outlier.
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prev_state_events (?): XXX: is this ever set to anything other than
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the empty list?
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"""
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__slots__ = [
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"current_state_ids",
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"prev_state_ids",
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"state_group",
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"rejected",
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"push_actions",
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"prev_group",
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"delta_ids",
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"prev_state_events",
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"app_service",
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]
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def __init__(self):
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# The current state including the current event
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self.current_state_ids = None
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# The current state excluding the current event
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self.prev_state_ids = None
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self.state_group = None
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self.rejected = False
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self.push_actions = []
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# A previously persisted state group and a delta between that
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# and this state.
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self.prev_group = None
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self.delta_ids = None
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self.prev_state_events = None
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self.app_service = None
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def serialize(self):
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"""Converts self to a type that can be serialized as JSON, and then
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deserialized by `deserialize`
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Returns:
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dict
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"""
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return {
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"current_state_ids": _encode_state_dict(self.current_state_ids),
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"prev_state_ids": _encode_state_dict(self.prev_state_ids),
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"state_group": self.state_group,
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"rejected": self.rejected,
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"push_actions": self.push_actions,
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"prev_group": self.prev_group,
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"delta_ids": _encode_state_dict(self.delta_ids),
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"prev_state_events": self.prev_state_events,
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"app_service_id": self.app_service.id if self.app_service else None
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}
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@staticmethod
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def deserialize(store, input):
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"""Converts a dict that was produced by `serialize` back into a
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EventContext.
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Args:
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store (DataStore): Used to convert AS ID to AS object
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input (dict): A dict produced by `serialize`
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Returns:
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EventContext
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"""
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context = EventContext()
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context.current_state_ids = _decode_state_dict(input["current_state_ids"])
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context.prev_state_ids = _decode_state_dict(input["prev_state_ids"])
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context.state_group = input["state_group"]
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context.rejected = input["rejected"]
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context.push_actions = input["push_actions"]
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context.prev_group = input["prev_group"]
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context.delta_ids = _decode_state_dict(input["delta_ids"])
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context.prev_state_events = input["prev_state_events"]
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app_service_id = input["app_service_id"]
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if app_service_id:
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context.app_service = store.get_app_service_by_id(app_service_id)
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return context
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def _encode_state_dict(state_dict):
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"""Since dicts of (type, state_key) -> event_id cannot be serialized in
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JSON we need to convert them to a form that can.
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"""
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if state_dict is None:
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return None
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return [
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(etype, state_key, v)
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for (etype, state_key), v in state_dict.iteritems()
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]
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def _decode_state_dict(input):
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"""Decodes a state dict encoded using `_encode_state_dict` above
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"""
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if input is None:
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return None
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return frozendict({(etype, state_key,): v for etype, state_key, v in input})
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