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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 synapse.api.errors import SynapseError
from collections import namedtuple
class DomainSpecificString(
namedtuple("DomainSpecificString", ("localpart", "domain", "is_mine"))
):
"""Common base class among ID/name strings that have a local part and a
domain name, prefixed with a sigil.
Has the fields:
'localpart' : The local part of the name (without the leading sigil)
'domain' : The domain part of the name
'is_mine' : Boolean indicating if the domain name is recognised by the
HomeServer as being its own
"""
# Deny iteration because it will bite you if you try to create a singleton
# set by:
# users = set(user)
def __iter__(self):
raise ValueError("Attempted to iterate a %s" % (type(self).__name__))
# Because this class is a namedtuple of strings and booleans, it is deeply
# immutable.
def __copy__(self):
return self
def __deepcopy__(self, memo):
return self
@classmethod
def from_string(cls, s, hs):
"""Parse the string given by 's' into a structure object."""
if s[0] != cls.SIGIL:
raise SynapseError(400, "Expected %s string to start with '%s'" % (
cls.__name__, cls.SIGIL,
))
parts = s[1:].split(':', 1)
if len(parts) != 2:
raise SynapseError(
400, "Expected %s of the form '%slocalname:domain'" % (
cls.__name__, cls.SIGIL,
)
)
domain = parts[1]
# This code will need changing if we want to support multiple domain
# names on one HS
is_mine = domain == hs.hostname
return cls(localpart=parts[0], domain=domain, is_mine=is_mine)
def to_string(self):
"""Return a string encoding the fields of the structure object."""
return "%s%s:%s" % (self.SIGIL, self.localpart, self.domain)
@classmethod
def create_local(cls, localpart, hs):
"""Create a structure on the local domain"""
return cls(localpart=localpart, domain=hs.hostname, is_mine=True)
@classmethod
def create(cls, localpart, domain, hs):
is_mine = domain == hs.hostname
return cls(localpart=localpart, domain=domain, is_mine=is_mine)
class UserID(DomainSpecificString):
"""Structure representing a user ID."""
SIGIL = "@"
class RoomAlias(DomainSpecificString):
"""Structure representing a room name."""
SIGIL = "#"
class RoomID(DomainSpecificString):
"""Structure representing a room id. """
SIGIL = "!"
class EventID(DomainSpecificString):
"""Structure representing an event id. """
SIGIL = "$"
class StreamToken(
namedtuple(
"Token",
("room_key", "presence_key", "typing_key")
)
):
_SEPARATOR = "_"
@classmethod
def from_string(cls, string):
try:
keys = string.split(cls._SEPARATOR)
return cls(*keys)
except:
raise SynapseError(400, "Invalid Token")
def to_string(self):
return self._SEPARATOR.join([str(k) for k in self])
def copy_and_replace(self, key, new_value):
d = self._asdict()
d[key] = new_value
return StreamToken(**d)
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