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# -*- coding: utf-8 -*-
# Copyright 2014 OpenMarket Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from .units import Pdu
from synapse.crypto.event_signing import hash_event_pdu, sign_event_pdu
import copy
def decode_event_id(event_id, server_name):
parts = event_id.split("@")
if len(parts) < 2:
return (event_id, server_name)
else:
return (parts[0], "".join(parts[1:]))
def encode_event_id(pdu_id, origin):
return "%s@%s" % (pdu_id, origin)
class PduCodec(object):
def __init__(self, hs):
self.signing_key = hs.config.signing_key[0]
self.server_name = hs.hostname
self.event_factory = hs.get_event_factory()
self.clock = hs.get_clock()
def event_from_pdu(self, pdu):
kwargs = {}
kwargs["event_id"] = encode_event_id(pdu.pdu_id, pdu.origin)
kwargs["room_id"] = pdu.context
kwargs["etype"] = pdu.pdu_type
kwargs["prev_pdus"] = pdu.prev_pdus
if hasattr(pdu, "prev_state_id") and hasattr(pdu, "prev_state_origin"):
kwargs["prev_state"] = encode_event_id(
pdu.prev_state_id, pdu.prev_state_origin
)
kwargs.update({
k: v
for k, v in pdu.get_full_dict().items()
if k not in [
"pdu_id",
"context",
"pdu_type",
"prev_pdus",
"prev_state_id",
"prev_state_origin",
]
})
return self.event_factory.create_event(**kwargs)
def pdu_from_event(self, event):
d = event.get_full_dict()
d["pdu_id"], d["origin"] = decode_event_id(
event.event_id, self.server_name
)
d["context"] = event.room_id
d["pdu_type"] = event.type
if hasattr(event, "prev_pdus"):
d["prev_pdus"] = event.prev_pdus
if hasattr(event, "prev_state"):
d["prev_state_id"], d["prev_state_origin"] = (
decode_event_id(event.prev_state, self.server_name)
)
if hasattr(event, "state_key"):
d["is_state"] = True
kwargs = copy.deepcopy(event.unrecognized_keys)
kwargs.update({
k: v for k, v in d.items()
if k not in ["event_id", "room_id", "type"]
})
if "ts" not in kwargs:
kwargs["ts"] = int(self.clock.time_msec())
pdu = Pdu(**kwargs)
pdu = hash_event_pdu(pdu)
return sign_event_pdu(pdu, self.server_name, self.signing_key)
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