forked-synapse/synapse/handlers/groups_local.py

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# Copyright 2017 Vector Creations Ltd
# Copyright 2018 New Vector Ltd
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#
# 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.
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import logging
from typing import TYPE_CHECKING, Any, Awaitable, Callable, Dict, Iterable, List, Set
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from synapse.api.errors import HttpResponseException, RequestSendFailed, SynapseError
from synapse.types import GroupID, JsonDict, get_domain_from_id
if TYPE_CHECKING:
from synapse.server import HomeServer
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logger = logging.getLogger(__name__)
def _create_rerouter(func_name: str) -> Callable[..., Awaitable[JsonDict]]:
"""Returns an async function that looks at the group id and calls the function
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on federation or the local group server if the group is local
"""
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async def f(
self: "GroupsLocalWorkerHandler", group_id: str, *args: Any, **kwargs: Any
) -> JsonDict:
if not GroupID.is_valid(group_id):
raise SynapseError(400, "%s is not a legal group ID" % (group_id,))
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if self.is_mine_id(group_id):
return await getattr(self.groups_server_handler, func_name)(
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group_id, *args, **kwargs
)
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else:
destination = get_domain_from_id(group_id)
try:
return await getattr(self.transport_client, func_name)(
destination, group_id, *args, **kwargs
)
except HttpResponseException as e:
# Capture errors returned by the remote homeserver and
# re-throw specific errors as SynapseErrors. This is so
# when the remote end responds with things like 403 Not
# In Group, we can communicate that to the client instead
# of a 500.
raise e.to_synapse_error()
except RequestSendFailed:
raise SynapseError(502, "Failed to contact group server")
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return f
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class GroupsLocalWorkerHandler:
def __init__(self, hs: "HomeServer"):
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self.hs = hs
self.store = hs.get_datastores().main
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self.room_list_handler = hs.get_room_list_handler()
self.groups_server_handler = hs.get_groups_server_handler()
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self.transport_client = hs.get_federation_transport_client()
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self.auth = hs.get_auth()
self.clock = hs.get_clock()
self.keyring = hs.get_keyring()
self.is_mine_id = hs.is_mine_id
self.signing_key = hs.signing_key
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self.server_name = hs.hostname
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self.notifier = hs.get_notifier()
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self.attestations = hs.get_groups_attestation_signing()
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self.profile_handler = hs.get_profile_handler()
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# The following functions merely route the query to the local groups server
# or federation depending on if the group is local or remote
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get_group_profile = _create_rerouter("get_group_profile")
get_rooms_in_group = _create_rerouter("get_rooms_in_group")
get_invited_users_in_group = _create_rerouter("get_invited_users_in_group")
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get_group_category = _create_rerouter("get_group_category")
get_group_categories = _create_rerouter("get_group_categories")
get_group_role = _create_rerouter("get_group_role")
get_group_roles = _create_rerouter("get_group_roles")
async def get_group_summary(
self, group_id: str, requester_user_id: str
) -> JsonDict:
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"""Get the group summary for a group.
If the group is remote we check that the users have valid attestations.
"""
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if self.is_mine_id(group_id):
res = await self.groups_server_handler.get_group_summary(
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group_id, requester_user_id
)
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else:
try:
res = await self.transport_client.get_group_summary(
get_domain_from_id(group_id), group_id, requester_user_id
)
except HttpResponseException as e:
raise e.to_synapse_error()
except RequestSendFailed:
raise SynapseError(502, "Failed to contact group server")
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group_server_name = get_domain_from_id(group_id)
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# Loop through the users and validate the attestations.
chunk = res["users_section"]["users"]
valid_users = []
for entry in chunk:
g_user_id = entry["user_id"]
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attestation = entry.pop("attestation", {})
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try:
if get_domain_from_id(g_user_id) != group_server_name:
await self.attestations.verify_attestation(
attestation,
group_id=group_id,
user_id=g_user_id,
server_name=get_domain_from_id(g_user_id),
)
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valid_users.append(entry)
except Exception as e:
logger.info("Failed to verify user is in group: %s", e)
res["users_section"]["users"] = valid_users
res["users_section"]["users"].sort(key=lambda e: e.get("order", 0))
res["rooms_section"]["rooms"].sort(key=lambda e: e.get("order", 0))
# Add `is_publicised` flag to indicate whether the user has publicised their
# membership of the group on their profile
result = await self.store.get_publicised_groups_for_user(requester_user_id)
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is_publicised = group_id in result
res.setdefault("user", {})["is_publicised"] = is_publicised
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return res
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async def get_users_in_group(
self, group_id: str, requester_user_id: str
) -> JsonDict:
"""Get users in a group"""
if self.is_mine_id(group_id):
return await self.groups_server_handler.get_users_in_group(
group_id, requester_user_id
)
group_server_name = get_domain_from_id(group_id)
try:
res = await self.transport_client.get_users_in_group(
get_domain_from_id(group_id), group_id, requester_user_id
)
except HttpResponseException as e:
raise e.to_synapse_error()
except RequestSendFailed:
raise SynapseError(502, "Failed to contact group server")
chunk = res["chunk"]
valid_entries = []
for entry in chunk:
g_user_id = entry["user_id"]
attestation = entry.pop("attestation", {})
try:
if get_domain_from_id(g_user_id) != group_server_name:
await self.attestations.verify_attestation(
attestation,
group_id=group_id,
user_id=g_user_id,
server_name=get_domain_from_id(g_user_id),
)
valid_entries.append(entry)
except Exception as e:
logger.info("Failed to verify user is in group: %s", e)
res["chunk"] = valid_entries
return res
async def get_joined_groups(self, user_id: str) -> JsonDict:
group_ids = await self.store.get_joined_groups(user_id)
return {"groups": group_ids}
async def get_publicised_groups_for_user(self, user_id: str) -> JsonDict:
if self.hs.is_mine_id(user_id):
result = await self.store.get_publicised_groups_for_user(user_id)
# Check AS associated groups for this user - this depends on the
# RegExps in the AS registration file (under `users`)
for app_service in self.store.get_app_services():
result.extend(app_service.get_groups_for_user(user_id))
return {"groups": result}
else:
try:
bulk_result = await self.transport_client.bulk_get_publicised_groups(
get_domain_from_id(user_id), [user_id]
)
except HttpResponseException as e:
raise e.to_synapse_error()
except RequestSendFailed:
raise SynapseError(502, "Failed to contact group server")
result = bulk_result.get("users", {}).get(user_id)
# TODO: Verify attestations
return {"groups": result}
async def bulk_get_publicised_groups(
self, user_ids: Iterable[str], proxy: bool = True
) -> JsonDict:
destinations: Dict[str, Set[str]] = {}
local_users = set()
for user_id in user_ids:
if self.hs.is_mine_id(user_id):
local_users.add(user_id)
else:
destinations.setdefault(get_domain_from_id(user_id), set()).add(user_id)
if not proxy and destinations:
raise SynapseError(400, "Some user_ids are not local")
results = {}
failed_results: List[str] = []
for destination, dest_user_ids in destinations.items():
try:
r = await self.transport_client.bulk_get_publicised_groups(
destination, list(dest_user_ids)
)
results.update(r["users"])
except Exception:
failed_results.extend(dest_user_ids)
for uid in local_users:
results[uid] = await self.store.get_publicised_groups_for_user(uid)
# Check AS associated groups for this user - this depends on the
# RegExps in the AS registration file (under `users`)
for app_service in self.store.get_app_services():
results[uid].extend(app_service.get_groups_for_user(uid))
return {"users": results}
class GroupsLocalHandler(GroupsLocalWorkerHandler):
def __init__(self, hs: "HomeServer"):
super().__init__(hs)
# Ensure attestations get renewed
hs.get_groups_attestation_renewer()
# The following functions merely route the query to the local groups server
# or federation depending on if the group is local or remote
update_group_profile = _create_rerouter("update_group_profile")
add_room_to_group = _create_rerouter("add_room_to_group")
update_room_in_group = _create_rerouter("update_room_in_group")
remove_room_from_group = _create_rerouter("remove_room_from_group")
update_group_summary_room = _create_rerouter("update_group_summary_room")
delete_group_summary_room = _create_rerouter("delete_group_summary_room")
update_group_category = _create_rerouter("update_group_category")
delete_group_category = _create_rerouter("delete_group_category")
update_group_summary_user = _create_rerouter("update_group_summary_user")
delete_group_summary_user = _create_rerouter("delete_group_summary_user")
update_group_role = _create_rerouter("update_group_role")
delete_group_role = _create_rerouter("delete_group_role")
set_group_join_policy = _create_rerouter("set_group_join_policy")
async def create_group(
self, group_id: str, user_id: str, content: JsonDict
) -> JsonDict:
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"""Create a group"""
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logger.info("Asking to create group with ID: %r", group_id)
if self.is_mine_id(group_id):
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res = await self.groups_server_handler.create_group(
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group_id, user_id, content
)
local_attestation = None
remote_attestation = None
else:
raise SynapseError(400, "Unable to create remote groups")
is_publicised = content.get("publicise", False)
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token = await self.store.register_user_group_membership(
group_id,
user_id,
membership="join",
is_admin=True,
local_attestation=local_attestation,
remote_attestation=remote_attestation,
is_publicised=is_publicised,
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)
self.notifier.on_new_event("groups_key", token, users=[user_id])
return res
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async def join_group(
self, group_id: str, user_id: str, content: JsonDict
) -> JsonDict:
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"""Request to join a group"""
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if self.is_mine_id(group_id):
await self.groups_server_handler.join_group(group_id, user_id, content)
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local_attestation = None
remote_attestation = None
else:
local_attestation = self.attestations.create_attestation(group_id, user_id)
content["attestation"] = local_attestation
try:
res = await self.transport_client.join_group(
get_domain_from_id(group_id), group_id, user_id, content
)
except HttpResponseException as e:
raise e.to_synapse_error()
except RequestSendFailed:
raise SynapseError(502, "Failed to contact group server")
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remote_attestation = res["attestation"]
await self.attestations.verify_attestation(
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remote_attestation,
group_id=group_id,
user_id=user_id,
server_name=get_domain_from_id(group_id),
)
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# TODO: Check that the group is public and we're being added publicly
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is_publicised = content.get("publicise", False)
token = await self.store.register_user_group_membership(
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group_id,
user_id,
membership="join",
is_admin=False,
local_attestation=local_attestation,
remote_attestation=remote_attestation,
is_publicised=is_publicised,
)
self.notifier.on_new_event("groups_key", token, users=[user_id])
return {}
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async def accept_invite(
self, group_id: str, user_id: str, content: JsonDict
) -> JsonDict:
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"""Accept an invite to a group"""
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if self.is_mine_id(group_id):
await self.groups_server_handler.accept_invite(group_id, user_id, content)
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local_attestation = None
remote_attestation = None
else:
local_attestation = self.attestations.create_attestation(group_id, user_id)
content["attestation"] = local_attestation
try:
res = await self.transport_client.accept_group_invite(
get_domain_from_id(group_id), group_id, user_id, content
)
except HttpResponseException as e:
raise e.to_synapse_error()
except RequestSendFailed:
raise SynapseError(502, "Failed to contact group server")
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remote_attestation = res["attestation"]
await self.attestations.verify_attestation(
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remote_attestation,
group_id=group_id,
user_id=user_id,
server_name=get_domain_from_id(group_id),
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)
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# TODO: Check that the group is public and we're being added publicly
is_publicised = content.get("publicise", False)
token = await self.store.register_user_group_membership(
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group_id,
user_id,
membership="join",
is_admin=False,
local_attestation=local_attestation,
remote_attestation=remote_attestation,
is_publicised=is_publicised,
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)
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self.notifier.on_new_event("groups_key", token, users=[user_id])
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return {}
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async def invite(
self, group_id: str, user_id: str, requester_user_id: str, config: JsonDict
) -> JsonDict:
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"""Invite a user to a group"""
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content = {"requester_user_id": requester_user_id, "config": config}
if self.is_mine_id(group_id):
res = await self.groups_server_handler.invite_to_group(
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group_id, user_id, requester_user_id, content
)
else:
try:
res = await self.transport_client.invite_to_group(
get_domain_from_id(group_id),
group_id,
user_id,
requester_user_id,
content,
)
except HttpResponseException as e:
raise e.to_synapse_error()
except RequestSendFailed:
raise SynapseError(502, "Failed to contact group server")
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return res
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async def on_invite(
self, group_id: str, user_id: str, content: JsonDict
) -> JsonDict:
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"""One of our users were invited to a group"""
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# TODO: Support auto join and rejection
if not self.is_mine_id(user_id):
raise SynapseError(400, "User not on this server")
local_profile = {}
if "profile" in content:
if "name" in content["profile"]:
local_profile["name"] = content["profile"]["name"]
if "avatar_url" in content["profile"]:
local_profile["avatar_url"] = content["profile"]["avatar_url"]
token = await self.store.register_user_group_membership(
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group_id,
user_id,
membership="invite",
content={"profile": local_profile, "inviter": content["inviter"]},
)
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self.notifier.on_new_event("groups_key", token, users=[user_id])
try:
user_profile = await self.profile_handler.get_profile(user_id)
except Exception as e:
logger.warning("No profile for user %s: %s", user_id, e)
user_profile = {}
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return {"state": "invite", "user_profile": user_profile}
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async def remove_user_from_group(
self, group_id: str, user_id: str, requester_user_id: str, content: JsonDict
) -> JsonDict:
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"""Remove a user from a group"""
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if user_id == requester_user_id:
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token = await self.store.register_user_group_membership(
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group_id, user_id, membership="leave"
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)
self.notifier.on_new_event("groups_key", token, users=[user_id])
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# TODO: Should probably remember that we tried to leave so that we can
# retry if the group server is currently down.
if self.is_mine_id(group_id):
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res = await self.groups_server_handler.remove_user_from_group(
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group_id, user_id, requester_user_id, content
)
else:
content["requester_user_id"] = requester_user_id
try:
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res = await self.transport_client.remove_user_from_group(
get_domain_from_id(group_id),
group_id,
requester_user_id,
user_id,
content,
)
except HttpResponseException as e:
raise e.to_synapse_error()
except RequestSendFailed:
raise SynapseError(502, "Failed to contact group server")
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return res
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async def user_removed_from_group(
self, group_id: str, user_id: str, content: JsonDict
) -> None:
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"""One of our users was removed/kicked from a group"""
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# TODO: Check if user in group
token = await self.store.register_user_group_membership(
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group_id, user_id, membership="leave"
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)
self.notifier.on_new_event("groups_key", token, users=[user_id])