moment/src/python/matrix_client.py
2019-12-16 05:14:26 -04:00

947 lines
32 KiB
Python

import asyncio
import html
import io
import logging as log
import platform
import re
import traceback
from contextlib import suppress
from datetime import datetime
from functools import partial
from pathlib import Path
from typing import (
Any, DefaultDict, Dict, List, NamedTuple, Optional, Set, Tuple, Type,
Union,
)
from urllib.parse import urlparse
from uuid import UUID, uuid4
import cairosvg
from PIL import Image as PILImage
from pymediainfo import MediaInfo
import nio
from nio.crypto import AsyncDataT as UploadData
from nio.crypto import async_generator_from_data
from . import __about__, utils
from .errors import (
BadMimeType, InvalidUserId, InvalidUserInContext, MatrixError,
UneededThumbnail, UserNotFound,
)
from .html_filter import HTML_FILTER
from .models.items import (
Account, Event, Member, Room, TypeSpecifier, Upload, UploadStatus,
)
from .models.model_store import ModelStore
from .pyotherside_events import AlertRequested
CryptDict = Dict[str, Any]
class UploadReturn(NamedTuple):
mxc: str
mime: str
decryption_dict: Dict[str, Any]
class MatrixImageInfo(NamedTuple):
w: int
h: int
mimetype: str
size: int
class MatrixClient(nio.AsyncClient):
user_id_regex = re.compile(r"^@.+:.+")
room_id_or_alias_regex = re.compile(r"^[#!].+:.+")
http_s_url = re.compile(r"^https?://")
def __init__(self,
backend,
user: str,
homeserver: str = "https://matrix.org",
device_id: Optional[str] = None) -> None:
if not urlparse(homeserver).scheme:
raise ValueError(
f"homeserver is missing scheme (e.g. https://): {homeserver}",
)
store = Path(backend.app.appdirs.user_data_dir) / "encryption"
store.mkdir(parents=True, exist_ok=True)
super().__init__(
homeserver = homeserver,
user = user,
device_id = device_id,
store_path = store,
config = nio.AsyncClientConfig(
max_timeout_retry_wait_time = 10,
# TODO: pass a custom encryption DB pickle key?
),
)
from .backend import Backend
self.backend: Backend = backend
self.models: ModelStore = self.backend.models
self.profile_task: Optional[asyncio.Future] = None
self.sync_task: Optional[asyncio.Future] = None
self.load_rooms_task: Optional[asyncio.Future] = None
self.first_sync_done: asyncio.Event = asyncio.Event()
self.first_sync_date: Optional[datetime] = None
self.send_locks: DefaultDict[str, asyncio.Lock] = \
DefaultDict(asyncio.Lock) # {room_id: lock}
self.past_tokens: Dict[str, str] = {} # {room_id: token}
self.fully_loaded_rooms: Set[str] = set() # {room_id}
self.loaded_once_rooms: Set[str] = set() # {room_id}
self.cleared_events_rooms: Set[str] = set() # {room_id}
self.local_echoes_uuid: Set[str] = set()
self.resolved_echoes: Dict[str, str] = {} # {event_id: echo_uuid}
self.skipped_events: DefaultDict[str, int] = DefaultDict(lambda: 0)
from .nio_callbacks import NioCallbacks
self.nio_callbacks = NioCallbacks(self)
def __repr__(self) -> str:
return "%s(user_id=%r, homeserver=%r, device_id=%r)" % (
type(self).__name__, self.user_id, self.homeserver, self.device_id,
)
@property
def default_device_name(self) -> str:
os_ = f" on {platform.system()}".rstrip()
os_ = f"{os_} {platform.release()}".rstrip() if os_ != " on" else ""
return f"{__about__.__pretty_name__}{os_}"
async def login(self, password: str, device_name: str = "") -> None:
response = await super().login(
password, device_name or self.default_device_name,
)
if isinstance(response, nio.LoginError):
raise MatrixError.from_nio(response)
asyncio.ensure_future(self.start())
async def resume(self, user_id: str, token: str, device_id: str) -> None:
self.user_id = user_id
self.access_token = token
self.device_id = device_id
asyncio.ensure_future(self.start())
async def logout(self) -> None:
for task in (self.profile_task, self.load_rooms_task, self.sync_task):
if task:
task.cancel()
with suppress(asyncio.CancelledError):
await task
await super().logout()
await self.close()
async def start(self) -> None:
def on_profile_response(future) -> None:
exception = future.exception()
if exception:
log.warn("On %s client startup: %r", self.user_id, exception)
self.profile_task = asyncio.ensure_future(
self.backend.get_profile(self.user_id),
)
self.profile_task.add_done_callback(on_profile_response)
return
resp = future.result()
account = self.models[Account][self.user_id]
account.profile_updated = datetime.now()
account.display_name = resp.displayname or ""
account.avatar_url = resp.avatar_url or ""
self.profile_task = asyncio.ensure_future(
self.backend.get_profile(self.user_id),
)
self.profile_task.add_done_callback(on_profile_response)
while True:
try:
self.sync_task = asyncio.ensure_future(
self.sync_forever(timeout=10_000),
)
await self.sync_task
break # task cancelled
except Exception:
trace = traceback.format_exc().rstrip()
log.error("Exception during sync, will restart:\n%s", trace)
await asyncio.sleep(2)
@property
def all_rooms(self) -> Dict[str, nio.MatrixRoom]:
return {**self.invited_rooms, **self.rooms}
async def send_text(self, room_id: str, text: str) -> None:
escape = False
if text.startswith("//") or text.startswith(r"\/"):
escape = True
text = text[1:]
if text.startswith("/me ") and not escape:
event_type = nio.RoomMessageEmote
text = text[len("/me "): ]
content = {"body": text, "msgtype": "m.emote"}
to_html = HTML_FILTER.from_markdown_inline(text, outgoing=True)
echo_body = HTML_FILTER.from_markdown_inline(text)
else:
event_type = nio.RoomMessageText
content = {"body": text, "msgtype": "m.text"}
to_html = HTML_FILTER.from_markdown(text, outgoing=True)
echo_body = HTML_FILTER.from_markdown(text)
if to_html not in (html.escape(text), f"<p>{html.escape(text)}</p>"):
content["format"] = "org.matrix.custom.html"
content["formatted_body"] = to_html
uuid = str(uuid4())
await self._local_echo(room_id, uuid, event_type, content=echo_body)
await self._send_message(room_id, uuid, content)
async def send_file(self, room_id: str, path: Union[Path, str]) -> None:
item_uuid = uuid4()
try:
await self._send_file(item_uuid, room_id, path)
except (nio.TransferCancelledError, asyncio.CancelledError):
log.info("Deleting item for cancelled upload %s", item_uuid)
del self.models[Upload, room_id][str(item_uuid)]
async def _send_file(
self, item_uuid: UUID, room_id: str, path: Union[Path, str],
) -> None:
from .media_cache import Media, Thumbnail
path = Path(path)
encrypt = room_id in self.encrypted_rooms
try:
size = path.resolve().stat().st_size
except (PermissionError, FileNotFoundError):
# This error will be caught again by the try block later below
size = 0
task = asyncio.Task.current_task()
monitor = nio.TransferMonitor(size)
upload_item = Upload(item_uuid, task, monitor, path, total_size=size)
self.models[Upload, room_id][str(item_uuid)] = upload_item
def on_transfered(transfered: int) -> None:
upload_item.uploaded = transfered
def on_speed_changed(speed: float) -> None:
upload_item.speed = speed
upload_item.time_left = monitor.remaining_time
monitor.on_transfered = on_transfered
monitor.on_speed_changed = on_speed_changed
try:
url, mime, crypt_dict = await self.upload(
lambda *_: path,
filename = path.name,
encrypt = encrypt, monitor=monitor,
)
except (MatrixError, OSError) as err:
upload_item.status = UploadStatus.Error
upload_item.error = type(err)
upload_item.error_args = err.args
# Wait for cancellation from UI, see parent send_file() method
while True:
await asyncio.sleep(0.1)
upload_item.status = UploadStatus.Caching
await Media.from_existing_file(self.backend.media_cache, url, path)
kind = (mime or "").split("/")[0]
thumb_url: str = ""
thumb_info: Optional[MatrixImageInfo] = None
content: dict = {
"body": path.name,
"info": {
"mimetype": mime,
"size": upload_item.total_size,
},
}
if encrypt:
content["file"] = {"url": url, **crypt_dict}
else:
content["url"] = url
if kind == "image":
is_svg = mime == "image/svg+xml"
event_type = \
nio.RoomEncryptedImage if encrypt else nio.RoomMessageImage
content["msgtype"] = "m.image"
content["info"]["w"], content["info"]["h"] = (
await utils.svg_dimensions(path) if is_svg else
PILImage.open(path).size
)
try:
thumb_data, thumb_info = await self.generate_thumbnail(
path, is_svg=is_svg,
)
except UneededThumbnail:
pass
except OSError as err:
log.warning(f"Failed thumbnailing {path}: {err}")
else:
thumb_name = f"{path.stem}_thumbnail{''.join(path.suffixes)}"
upload_item.status = UploadStatus.Uploading
upload_item.filepath = Path(thumb_name)
upload_item.total_size = len(thumb_data)
try:
thumb_url, _, thumb_crypt_dict = await self.upload(
lambda *_: thumb_data,
filename =
f"{path.stem}_sample{''.join(path.suffixes)}",
encrypt = encrypt,
)
except MatrixError as err:
log.warning(f"Failed uploading thumbnail {path}: {err}")
else:
upload_item.status = UploadStatus.Caching
await Thumbnail.from_bytes(
self.backend.media_cache,
thumb_url,
thumb_data,
wanted_size = (content["info"]["w"],
content["info"]["h"]),
)
if encrypt:
content["info"]["thumbnail_file"] = {
"url": thumb_url,
**thumb_crypt_dict,
}
else:
content["info"]["thumbnail_url"] = thumb_url
content["info"]["thumbnail_info"] = thumb_info._asdict()
elif kind == "audio":
event_type = \
nio.RoomEncryptedAudio if encrypt else nio.RoomMessageAudio
content["msgtype"] = "m.audio"
content["info"]["duration"] = getattr(
MediaInfo.parse(path).tracks[0], "duration", 0,
) or 0
elif kind == "video":
event_type = \
nio.RoomEncryptedVideo if encrypt else nio.RoomMessageVideo
content["msgtype"] = "m.video"
tracks = MediaInfo.parse(path).tracks
content["info"]["duration"] = \
getattr(tracks[0], "duration", 0) or 0
content["info"]["w"] = max(
getattr(t, "width", 0) or 0 for t in tracks
)
content["info"]["h"] = max(
getattr(t, "height", 0) or 0 for t in tracks
)
else:
event_type = \
nio.RoomEncryptedFile if encrypt else nio.RoomMessageFile
content["msgtype"] = "m.file"
content["filename"] = path.name
del self.models[Upload, room_id][str(upload_item.uuid)]
uuid = str(uuid4())
await self._local_echo(
room_id, uuid, event_type,
inline_content = path.name,
media_url = url,
media_title = path.name,
media_width = content["info"].get("w", 0),
media_height = content["info"].get("h", 0),
media_duration = content["info"].get("duration", 0),
media_size = content["info"]["size"],
media_mime = content["info"]["mimetype"],
thumbnail_url = thumb_url,
thumbnail_width =
content["info"].get("thumbnail_info", {}).get("w", 0),
thumbnail_height =
content["info"].get("thumbnail_info", {}).get("h", 0),
)
await self._send_message(room_id, uuid, content)
async def _local_echo(
self, room_id: str, uuid: str,
event_type: Type[nio.Event], **event_fields,
) -> None:
our_info = self.models[Member, self.user_id, room_id][self.user_id]
event = Event(
source = None,
client_id = f"echo-{uuid}",
event_id = "",
date = datetime.now(),
sender_id = self.user_id,
sender_name = our_info.display_name,
sender_avatar = our_info.avatar_url,
is_local_echo = True,
local_event_type = event_type,
**event_fields,
)
self.local_echoes_uuid.add(uuid)
for user_id in self.models[Account]:
if user_id in self.models[Member, self.user_id, room_id]:
self.models[Event, user_id, room_id][f"echo-{uuid}"] = event
self.models[Event, user_id, room_id].sync_now()
await self.set_room_last_event(room_id, event)
async def _send_message(self, room_id: str, uuid: str, content: dict,
) -> None:
async with self.send_locks[room_id]:
response = await self.room_send(
room_id = room_id,
message_type = "m.room.message",
content = content,
tx_id = uuid,
ignore_unverified_devices = True,
)
if isinstance(response, nio.RoomSendError):
raise MatrixError.from_nio(response)
async def load_past_events(self, room_id: str) -> bool:
if room_id in self.fully_loaded_rooms or \
room_id in self.invited_rooms or \
room_id in self.cleared_events_rooms:
return False
await self.first_sync_done.wait()
while not self.past_tokens.get(room_id):
# If a new room was added, wait for onSyncResponse to set the token
await asyncio.sleep(0.1)
response = await self.room_messages(
room_id = room_id,
start = self.past_tokens[room_id],
limit = 100 if room_id in self.loaded_once_rooms else 25,
)
if isinstance(response, nio.RoomMessagesError):
log.error("Loading past messages for room %s failed: %s",
room_id, response)
return True
self.loaded_once_rooms.add(room_id)
more_to_load = True
self.past_tokens[room_id] = response.end
for event in response.chunk:
if isinstance(event, nio.RoomCreateEvent):
self.fully_loaded_rooms.add(room_id)
more_to_load = False
for cb in self.event_callbacks:
if (cb.filter is None or isinstance(event, cb.filter)):
await cb.func(self.all_rooms[room_id], event)
return more_to_load
async def load_rooms_without_visible_events(self) -> None:
for room_id in self.models[Room, self.user_id]:
asyncio.ensure_future(
self._load_room_without_visible_events(room_id),
)
async def _load_room_without_visible_events(self, room_id: str) -> None:
events = self.models[Event, self.user_id, room_id]
more = True
while self.skipped_events[room_id] and not events and more:
more = await self.load_past_events(room_id)
async def new_direct_chat(self, invite: str, encrypt: bool = False) -> str:
if invite == self.user_id:
raise InvalidUserInContext(invite)
if not self.user_id_regex.match(invite):
raise InvalidUserId(invite)
if isinstance(await self.get_profile(invite), nio.ProfileGetError):
raise UserNotFound(invite)
response = await super().room_create(
invite = [invite],
is_direct = True,
visibility = nio.RoomVisibility.private,
initial_state =
[nio.EnableEncryptionBuilder().as_dict()] if encrypt else [],
)
if isinstance(response, nio.RoomCreateError):
raise MatrixError.from_nio(response)
return response.room_id
async def new_group_chat(
self,
name: Optional[str] = None,
topic: Optional[str] = None,
public: bool = False,
encrypt: bool = False,
federate: bool = True,
) -> str:
response = await super().room_create(
name = name or None,
topic = topic or None,
federate = federate,
visibility =
nio.RoomVisibility.public if public else
nio.RoomVisibility.private,
initial_state =
[nio.EnableEncryptionBuilder().as_dict()] if encrypt else [],
)
if isinstance(response, nio.RoomCreateError):
raise MatrixError.from_nio(response)
return response.room_id
async def room_join(self, alias_or_id_or_url: str) -> str:
string = alias_or_id_or_url.strip()
if self.http_s_url.match(string):
for part in urlparse(string).fragment.split("/"):
if self.room_id_or_alias_regex.match(part):
string = part
break
else:
raise ValueError(f"No alias or room id found in url {string}")
if not self.room_id_or_alias_regex.match(string):
raise ValueError("Not an alias or room id")
response = await super().join(string)
if isinstance(response, nio.JoinError):
raise MatrixError.from_nio(response)
return response.room_id
async def room_forget(self, room_id: str) -> None:
await super().room_leave(room_id)
await super().room_forget(room_id)
self.models[Room, self.user_id].pop(room_id, None)
self.models.pop((Event, self.user_id, room_id), None)
self.models.pop((Member, self.user_id, room_id), None)
async def room_mass_invite(
self, room_id: str, *user_ids: str,
) -> Tuple[List[str], List[Tuple[str, Exception]]]:
user_ids = tuple(
uid for uid in user_ids
# Server would return a 403 forbidden for users already in the room
if uid not in self.all_rooms[room_id].users
)
async def invite(user):
if not self.user_id_regex.match(user):
return InvalidUserId(user)
if isinstance(await self.get_profile(user), nio.ProfileGetError):
return UserNotFound(user)
return await self.room_invite(room_id, user)
coros = [invite(uid) for uid in user_ids]
successes = []
errors: list = []
responses = await asyncio.gather(*coros)
for user_id, response in zip(user_ids, responses):
if isinstance(response, nio.RoomInviteError):
errors.append((user_id, MatrixError.from_nio(response)))
elif isinstance(response, Exception):
errors.append((user_id, response))
else:
successes.append(user_id)
return (successes, errors)
async def generate_thumbnail(
self, data: UploadData, is_svg: bool = False,
) -> Tuple[bytes, MatrixImageInfo]:
png_modes = ("1", "L", "P", "RGBA")
data = b"".join([c async for c in async_generator_from_data(data)])
is_svg = await utils.guess_mime(data) == "image/svg+xml"
if is_svg:
svg_width, svg_height = await utils.svg_dimensions(data)
data = cairosvg.svg2png(
bytestring = data,
parent_width = svg_width,
parent_height = svg_height,
)
thumb = PILImage.open(io.BytesIO(data))
small = thumb.width <= 800 and thumb.height <= 600
is_jpg_png = thumb.format in ("JPEG", "PNG")
jpgable_png = thumb.format == "PNG" and thumb.mode not in png_modes
if small and is_jpg_png and not jpgable_png and not is_svg:
raise UneededThumbnail()
if not small:
thumb.thumbnail((800, 600), PILImage.LANCZOS)
with io.BytesIO() as out:
if thumb.mode in png_modes:
thumb.save(out, "PNG", optimize=True)
mime = "image/png"
else:
thumb.convert("RGB").save(out, "JPEG", optimize=True)
mime = "image/jpeg"
data = out.getvalue()
info = MatrixImageInfo(thumb.width, thumb.height, mime, len(data))
return (data, info)
async def upload(
self,
data_provider: nio.DataProvider,
mime: Optional[str] = None,
filename: Optional[str] = None,
encrypt: bool = False,
monitor: Optional[nio.TransferMonitor] = None,
) -> UploadReturn:
mime = mime or await utils.guess_mime(data_provider(0, 0))
response, decryption_dict = await super().upload(
data_provider,
"application/octet-stream" if encrypt else mime,
filename,
encrypt,
monitor,
)
if isinstance(response, nio.UploadError):
raise MatrixError.from_nio(response)
return UploadReturn(response.content_uri, mime, decryption_dict)
async def set_avatar_from_file(self, path: Union[Path, str]) -> None:
mime = await utils.guess_mime(path)
if mime.split("/")[0] != "image":
raise BadMimeType(wanted="image/*", got=mime)
mxc, *_ = await self.upload(lambda *_: path, mime, Path(path).name)
await self.set_avatar(mxc)
async def import_keys(self, infile: str, passphrase: str) -> None:
await super().import_keys(infile, passphrase)
await self.retry_decrypting_events()
async def export_keys(self, outfile: str, passphrase: str) -> None:
path = Path(outfile)
path.parent.mkdir(parents=True, exist_ok=True)
# The QML dialog asks the user if he wants to overwrite before this
if path.exists():
path.unlink()
await super().export_keys(outfile, passphrase)
async def retry_decrypting_events(self) -> None:
for sync_id, model in self.models.items():
if not (isinstance(sync_id, tuple) and
sync_id[0:2] == (Event, self.user_id)):
continue
_, _, room_id = sync_id
for ev in model.values():
room = self.all_rooms[room_id]
if isinstance(ev.source, nio.MegolmEvent):
try:
decrypted = self.decrypt_event(ev.source)
if not decrypted:
raise nio.EncryptionError()
except nio.EncryptionError:
continue
for cb in self.event_callbacks:
if not cb.filter or isinstance(decrypted, cb.filter):
await asyncio.coroutine(cb.func)(room, decrypted)
async def clear_events(self, room_id: str) -> None:
self.cleared_events_rooms.add(room_id)
model = self.models[Event, self.user_id, room_id]
if model:
model.clear()
model.sync_now()
# Functions to register data into models
async def event_is_past(self, ev: Union[nio.Event, Event]) -> bool:
if not self.first_sync_date:
return True
if isinstance(ev, Event):
return ev.date < self.first_sync_date
date = datetime.fromtimestamp(ev.server_timestamp / 1000)
return date < self.first_sync_date
async def set_room_last_event(self, room_id: str, item: Event) -> None:
model = self.models[Room, self.user_id]
room = model[room_id]
if room.last_event is None:
room.last_event = item.serialized
if item.is_local_echo:
model.sync_now()
return
is_profile_ev = item.type_specifier == TypeSpecifier.profile_change
# If there were no better events available to show previously
prev_is_profile_ev = \
room.last_event["type_specifier"] == TypeSpecifier.profile_change
# If this is a profile event, only replace the currently shown one if
# it was also a profile event (we had nothing better to show).
if is_profile_ev and not prev_is_profile_ev:
return
# If this event is older than the currently shown one, only replace
# it if the previous was a profile event.
if item.date < room.last_event["date"] and not prev_is_profile_ev:
return
room.last_event = item.serialized
if item.is_local_echo:
model.sync_now()
async def register_nio_room(self, room: nio.MatrixRoom, left: bool = False,
) -> None:
# Add room
try:
last_ev = self.models[Room, self.user_id][room.room_id].last_event
except KeyError:
last_ev = None
inviter = getattr(room, "inviter", "") or ""
levels = room.power_levels
can_send_state = partial(levels.can_user_send_state, self.user_id)
can_send_msg = partial(levels.can_user_send_message, self.user_id)
self.models[Room, self.user_id][room.room_id] = Room(
room_id = room.room_id,
given_name = room.name or "",
display_name = room.display_name or "",
avatar_url = room.gen_avatar_url or "",
plain_topic = room.topic or "",
topic = HTML_FILTER.filter_inline(room.topic or ""),
inviter_id = inviter,
inviter_name = room.user_name(inviter) if inviter else "",
inviter_avatar =
(room.avatar_url(inviter) or "") if inviter else "",
left = left,
encrypted = room.encrypted,
invite_required = room.join_rule == "invite",
guests_allowed = room.guest_access == "can_join",
can_invite = levels.can_user_invite(self.user),
can_send_messages = can_send_msg(),
can_set_name = can_send_state("m.room.name"),
can_set_topic = can_send_state("m.room.topic"),
can_set_avatar = can_send_state("m.room.avatar"),
can_set_encryption = can_send_state("m.room.encryption"),
can_set_join_rules = can_send_state("m.room.join_rules"),
can_set_guest_access = can_send_state("m.room.guest_access"),
last_event = last_ev,
)
# List members that left the room, then remove them from our model
left_the_room = [
user_id
for user_id in self.models[Member, self.user_id, room.room_id]
if user_id not in room.users
]
for user_id in left_the_room:
del self.models[Member, self.user_id, room.room_id][user_id]
# Add the room members to the added room
new_dict = {
user_id: Member(
user_id = user_id,
display_name = room.user_name(user_id) # disambiguated
if member.display_name else "",
avatar_url = member.avatar_url or "",
typing = user_id in room.typing_users,
power_level = member.power_level,
invited = member.invited,
) for user_id, member in room.users.items()
}
self.models[Member, self.user_id, room.room_id].update(new_dict)
async def get_member_name_avatar(self, room_id: str, user_id: str,
) -> Tuple[str, str]:
try:
item = self.models[Member, self.user_id, room_id][user_id]
except KeyError: # e.g. user is not anymore in the room
try:
info = await self.backend.get_profile(user_id)
return (info.displayname or "", info.avatar_url or "")
except MatrixError:
return ("", "")
else:
return (item.display_name, item.avatar_url)
async def register_nio_event(
self, room: nio.MatrixRoom, ev: nio.Event, **fields,
) -> None:
await self.register_nio_room(room)
sender_name, sender_avatar = \
await self.get_member_name_avatar(room.room_id, ev.sender)
target_id = getattr(ev, "state_key", "") or ""
target_name, target_avatar = \
await self.get_member_name_avatar(room.room_id, target_id) \
if target_id else ("", "")
# Create Event ModelItem
item = Event(
source = ev,
client_id = ev.event_id,
event_id = ev.event_id,
date = datetime.fromtimestamp(ev.server_timestamp / 1000),
sender_id = ev.sender,
sender_name = sender_name,
sender_avatar = sender_avatar,
target_id = target_id,
target_name = target_name,
target_avatar = target_avatar,
**fields,
)
# Add the Event to model
if ev.transaction_id in self.local_echoes_uuid:
self.resolved_echoes[ev.event_id] = ev.transaction_id
self.local_echoes_uuid.discard(ev.transaction_id)
item.client_id = f"echo-{ev.transaction_id}"
elif ev.sender in self.backend.clients:
client = self.backend.clients[ev.sender]
# Wait until our other account has no more pending local echoes,
# so that we can know if this event should replace an echo
# from that client by finding its ID in the resolved_echoes dict.
# Server only gives back the transaction ID to the original sender.
while client.local_echoes_uuid: # while there are pending echoes
await asyncio.sleep(0.1)
with suppress(KeyError):
item.client_id = f"echo-{client.resolved_echoes[ev.event_id]}"
elif not await self.event_is_past(ev):
AlertRequested()
self.models[Event, self.user_id, room.room_id][item.client_id] = item
await self.set_room_last_event(room.room_id, item)
if item.sender_id == self.user_id:
self.models[Event, self.user_id, room.room_id].sync_now()