132 lines
4.7 KiB
Python
132 lines
4.7 KiB
Python
# Copyright 2018 New Vector 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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import logging
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from typing import TYPE_CHECKING, Any, Set
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from synapse.api.errors import SynapseError
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from synapse.api.urls import ConsentURIBuilder
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from synapse.config import ConfigError
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from synapse.types import get_localpart_from_id
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if TYPE_CHECKING:
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from synapse.server import HomeServer
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logger = logging.getLogger(__name__)
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class ConsentServerNotices:
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"""Keeps track of whether we need to send users server_notices about
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privacy policy consent, and sends one if we do.
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"""
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def __init__(self, hs: "HomeServer"):
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self._server_notices_manager = hs.get_server_notices_manager()
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self._store = hs.get_datastore()
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self._users_in_progress: Set[str] = set()
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self._current_consent_version = hs.config.consent.user_consent_version
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self._server_notice_content = (
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hs.config.consent.user_consent_server_notice_content
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)
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self._send_to_guests = hs.config.consent.user_consent_server_notice_to_guests
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if self._server_notice_content is not None:
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if not self._server_notices_manager.is_enabled():
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raise ConfigError(
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"user_consent configuration requires server notices, but "
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"server notices are not enabled."
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)
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if "body" not in self._server_notice_content:
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raise ConfigError(
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"user_consent server_notice_consent must contain a 'body' key."
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)
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self._consent_uri_builder = ConsentURIBuilder(hs.config)
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async def maybe_send_server_notice_to_user(self, user_id: str) -> None:
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"""Check if we need to send a notice to this user, and does so if so
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Args:
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user_id: user to check
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"""
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if self._server_notice_content is None:
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# not enabled
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return
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# A consent version must be given.
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assert self._current_consent_version is not None
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# make sure we don't send two messages to the same user at once
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if user_id in self._users_in_progress:
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return
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self._users_in_progress.add(user_id)
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try:
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u = await self._store.get_user_by_id(user_id)
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# The user doesn't exist.
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if u is None:
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return
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if u["is_guest"] and not self._send_to_guests:
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# don't send to guests
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return
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if u["consent_version"] == self._current_consent_version:
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# user has already consented
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return
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if u["consent_server_notice_sent"] == self._current_consent_version:
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# we've already sent a notice to the user
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return
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# need to send a message.
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try:
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consent_uri = self._consent_uri_builder.build_user_consent_uri(
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get_localpart_from_id(user_id)
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)
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content = copy_with_str_subst(
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self._server_notice_content, {"consent_uri": consent_uri}
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)
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await self._server_notices_manager.send_notice(user_id, content)
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await self._store.user_set_consent_server_notice_sent(
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user_id, self._current_consent_version
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)
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except SynapseError as e:
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logger.error("Error sending server notice about user consent: %s", e)
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finally:
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self._users_in_progress.remove(user_id)
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def copy_with_str_subst(x: Any, substitutions: Any) -> Any:
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"""Deep-copy a structure, carrying out string substitutions on any strings
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Args:
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x (object): structure to be copied
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substitutions (object): substitutions to be made - passed into the
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string '%' operator
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Returns:
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copy of x
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"""
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if isinstance(x, str):
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return x % substitutions
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if isinstance(x, dict):
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return {k: copy_with_str_subst(v, substitutions) for (k, v) in x.items()}
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if isinstance(x, (list, tuple)):
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return [copy_with_str_subst(y, substitutions) for y in x]
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# assume it's uninterested and can be shallow-copied.
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return x
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