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Document matrix_client.py

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miruka 2019-12-18 13:16:15 -04:00
parent 05a331382e
commit c6938903b8
2 changed files with 161 additions and 14 deletions
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2
TODO.md
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@ -47,6 +47,8 @@
## Issues
- last event obj
- load_past raise
- Room pane slightly overlaps chat at small width
- invisible uploaded mxc images?
- first undecryptable message

167
src/backend/matrix_client.py
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@ -1,3 +1,5 @@
"""Matrix client and related classes."""
import asyncio
import html
import io
@ -41,23 +43,40 @@ CryptDict = Dict[str, Any]
class UploadReturn(NamedTuple):
"""Details for an uploaded file."""
mxc: str
mime: str
decryption_dict: Dict[str, Any]
class MatrixImageInfo(NamedTuple):
w: int
h: int
mimetype: str
"""Image informations to be passed for Matrix file events."""
width: int
height: int
mime: str
size: int
def as_dict(self) -> Dict[str, Union[int, str]]:
"""Return a dict ready to be included in a Matrix file events."""
return {
"w": self.width,
"h": self.height,
"mimetype": self.mime,
"size": self.size,
}
class MatrixClient(nio.AsyncClient):
"""A client for an account to interact with a matrix homeserver."""
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,
@ -112,12 +131,16 @@ class MatrixClient(nio.AsyncClient):
@property
def default_device_name(self) -> str:
"""Device name to set at login if the user hasn't set a custom one."""
os_ = f" on {platform.system()}".rstrip()
os_ = f"{os_} {platform.release()}".rstrip() if os_ != " on" else ""
return f"{__display_name__}{os_}"
async def login(self, password: str, device_name: str = "") -> None:
"""Login to the server using the account's password."""
response = await super().login(
password, device_name or self.default_device_name,
)
@ -125,17 +148,21 @@ class MatrixClient(nio.AsyncClient):
if isinstance(response, nio.LoginError):
raise MatrixError.from_nio(response)
asyncio.ensure_future(self.start())
asyncio.ensure_future(self._start())
async def resume(self, user_id: str, token: str, device_id: str) -> None:
"""Login to the server using an existing access token."""
response = nio.LoginResponse(user_id, device_id, token)
await self.receive_response(response)
asyncio.ensure_future(self.start())
asyncio.ensure_future(self._start())
async def logout(self) -> None:
"""Logout from the server. This will delete the device."""
for task in (self.profile_task, self.load_rooms_task, self.sync_task):
if task:
task.cancel()
@ -148,14 +175,20 @@ class MatrixClient(nio.AsyncClient):
@property
def syncing(self) -> bool:
"""Return whether this client is currently syncing with the server."""
if not self.sync_task:
return False
return not self.sync_task.done()
async def start(self) -> None:
async def _start(self) -> None:
"""Fetch our user profile and enter the server sync loop."""
def on_profile_response(future) -> None:
"""Update our model `Account` with the received profile details."""
exception = future.exception()
if exception:
@ -192,10 +225,14 @@ class MatrixClient(nio.AsyncClient):
@property
def all_rooms(self) -> Dict[str, nio.MatrixRoom]:
"""Return dict containing both our joined and invited rooms."""
return {**self.invited_rooms, **self.rooms}
async def send_text(self, room_id: str, text: str) -> None:
"""Send a markdown `m.text` or `m.notice` (with `/me`) message ."""
escape = False
if text.startswith("//") or text.startswith(r"\/"):
escape = True
@ -228,6 +265,8 @@ class MatrixClient(nio.AsyncClient):
async def send_file(self, room_id: str, path: Union[Path, str]) -> None:
"""Send a `m.file`, `m.image`, `m.audio` or `m.video` message."""
item_uuid = uuid4()
try:
@ -240,6 +279,11 @@ class MatrixClient(nio.AsyncClient):
async def _send_file(
self, item_uuid: UUID, room_id: str, path: Union[Path, str],
) -> None:
"""Monitorably upload a file + thumbnail and send the built event."""
# TODO: this function is WAY TOO COMPLEX, and most of it should be
# refactored into nio.
from .media_cache import Media, Thumbnail
transaction_id = uuid4()
@ -361,7 +405,7 @@ class MatrixClient(nio.AsyncClient):
else:
content["info"]["thumbnail_url"] = thumb_url
content["info"]["thumbnail_info"] = thumb_info._asdict()
content["info"]["thumbnail_info"] = thumb_info.as_dict()
elif kind == "audio":
event_type = \
@ -422,9 +466,27 @@ class MatrixClient(nio.AsyncClient):
async def _local_echo(
self, room_id: str, transaction_id: UUID,
event_type: Type[nio.Event], **event_fields,
self,
room_id: str,
transaction_id: UUID,
event_type: Type[nio.Event],
**event_fields,
) -> None:
"""Register a local model `Event` while waiting for the server.
When the user sends a message, we want to show instant feedback in
the UI timeline without waiting for the servers to receive our message
and retransmit it to us.
The event will be locally echoed for all our accounts that are members
of the `room_id` room.
This allows sending messages from other accounts within the same
composer without having to go to another page in the UI,
and getting direct feedback for these accounts in the timeline.
When we do get the real event retransmited by the server, it will
replace the local one we registered.
"""
our_info = self.models[Member, self.user_id, room_id][self.user_id]
@ -453,6 +515,7 @@ class MatrixClient(nio.AsyncClient):
async def _send_message(self, room_id: str, content: dict) -> None:
"""Send a message event with `content` dict to a room."""
async with self.backend.send_locks[room_id]:
response = await self.room_send(
@ -467,6 +530,14 @@ class MatrixClient(nio.AsyncClient):
async def load_past_events(self, room_id: str) -> bool:
"""Ask the server for 100 previous events of the room.
Events from before the client was started will be requested and
registered into our models.
Returns whether there are any messages left to load.
"""
if room_id in self.fully_loaded_rooms or \
room_id in self.invited_rooms or \
room_id in self.cleared_events_rooms:
@ -507,6 +578,8 @@ class MatrixClient(nio.AsyncClient):
async def load_rooms_without_visible_events(self) -> None:
"""Call `_load_room_without_visible_events` for all joined rooms."""
for room_id in self.models[Room, self.user_id]:
asyncio.ensure_future(
self._load_room_without_visible_events(room_id),
@ -514,6 +587,20 @@ class MatrixClient(nio.AsyncClient):
async def _load_room_without_visible_events(self, room_id: str) -> None:
"""Request past events for rooms without any suitable event to show.
Some events are currently not supported, or processed but not
shown in the UI timeline/room "last event" subtitle, e.g.
the "x changed their name/avatar" events.
It could happen that all the initial events received in the initial
sync for a room are such events,
and thus we'd have nothing to show in the room.
This method tries to load past events until we have at least one
to show or there is nothing left to load.
"""
events = self.models[Event, self.user_id, room_id]
more = True
@ -522,6 +609,8 @@ class MatrixClient(nio.AsyncClient):
async def new_direct_chat(self, invite: str, encrypt: bool = False) -> str:
"""Create a room and invite a single user in it for a direct chat."""
if invite == self.user_id:
raise InvalidUserInContext(invite)
@ -553,6 +642,7 @@ class MatrixClient(nio.AsyncClient):
encrypt: bool = False,
federate: bool = True,
) -> str:
"""Create a new matrix room with the purpose of being a group chat."""
response = await super().room_create(
name = name or None,
@ -571,6 +661,8 @@ class MatrixClient(nio.AsyncClient):
return response.room_id
async def room_join(self, alias_or_id_or_url: str) -> str:
"""Join an existing matrix room."""
string = alias_or_id_or_url.strip()
if self.http_s_url.match(string):
@ -593,6 +685,12 @@ class MatrixClient(nio.AsyncClient):
async def room_forget(self, room_id: str) -> None:
"""Leave a joined room (or decline an invite) and forget its history.
If all the members of a room leave and forget it, that room
will be marked as suitable for destruction by the server.
"""
await super().room_leave(room_id)
await super().room_forget(room_id)
self.models[Room, self.user_id].pop(room_id, None)
@ -603,6 +701,13 @@ class MatrixClient(nio.AsyncClient):
async def room_mass_invite(
self, room_id: str, *user_ids: str,
) -> Tuple[List[str], List[Tuple[str, Exception]]]:
"""Invite users to a room in parallel.
Returns a tuple with:
- A list of users we successfully invited
- A list of `(user_id, Exception)` tuples for those failed to invite.
"""
user_ids = tuple(
uid for uid in user_ids
@ -640,6 +745,7 @@ class MatrixClient(nio.AsyncClient):
async def generate_thumbnail(
self, data: UploadData, is_svg: bool = False,
) -> Tuple[bytes, MatrixImageInfo]:
"""Create a thumbnail from an image, return the bytes and info."""
png_modes = ("1", "L", "P", "RGBA")
@ -689,6 +795,7 @@ class MatrixClient(nio.AsyncClient):
encrypt: bool = False,
monitor: Optional[nio.TransferMonitor] = None,
) -> UploadReturn:
"""Upload a file to the matrix homeserver."""
mime = mime or await utils.guess_mime(data_provider(0, 0))
@ -707,6 +814,8 @@ class MatrixClient(nio.AsyncClient):
async def set_avatar_from_file(self, path: Union[Path, str]) -> None:
"""Upload an image to the homeserver and set it as our avatar."""
mime = await utils.guess_mime(path)
if mime.split("/")[0] != "image":
@ -717,11 +826,15 @@ class MatrixClient(nio.AsyncClient):
async def import_keys(self, infile: str, passphrase: str) -> None:
"""Import decryption keys from a file, then retry decrypting events."""
await super().import_keys(infile, passphrase)
await self.retry_decrypting_events()
async def export_keys(self, outfile: str, passphrase: str) -> None:
"""Export our decryption keys to a file."""
path = Path(outfile)
path.parent.mkdir(parents=True, exist_ok=True)
@ -733,6 +846,8 @@ class MatrixClient(nio.AsyncClient):
async def retry_decrypting_events(self) -> None:
"""Retry decrypting room `Event`s in our model we failed to decrypt."""
for sync_id, model in self.models.items():
if not (isinstance(sync_id, tuple) and
sync_id[0:2] == (Event, self.user_id)):
@ -759,6 +874,11 @@ class MatrixClient(nio.AsyncClient):
async def clear_events(self, room_id: str) -> None:
"""Remove every `Event` of a room we registred in our model.
The events will be gone from the UI, until the client is restarted.
"""
self.cleared_events_rooms.add(room_id)
model = self.models[Event, self.user_id, room_id]
if model:
@ -769,6 +889,8 @@ class MatrixClient(nio.AsyncClient):
# Functions to register data into models
async def event_is_past(self, ev: Union[nio.Event, Event]) -> bool:
"""Return whether an event was created before this client started."""
if not self.first_sync_date:
return True
@ -780,6 +902,11 @@ class MatrixClient(nio.AsyncClient):
async def set_room_last_event(self, room_id: str, item: Event) -> None:
"""Set the `last_event` for a `Room` using data in our `Event` model.
The `last_event` is notably displayed in the UI room subtitles.
"""
model = self.models[Room, self.user_id]
room = model[room_id]
@ -813,8 +940,11 @@ class MatrixClient(nio.AsyncClient):
model.sync_now()
async def register_nio_room(self, room: nio.MatrixRoom, left: bool = False,
async def register_nio_room(
self, room: nio.MatrixRoom, left: bool = False,
) -> None:
"""Register a `nio.MatrixRoom` as a `Room` object in our model."""
# Add room
try:
last_ev = self.models[Room, self.user_id][room.room_id].last_event
@ -880,16 +1010,26 @@ class MatrixClient(nio.AsyncClient):
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,
async def get_member_name_avatar(
self, room_id: str, user_id: str,
) -> Tuple[str, str]:
"""Return a room member's display name and avatar.
If the member isn't found in the room (e.g. they left), their
profile is retrieved using `MatrixClient.backend.get_profile()`.
"""
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)
@ -897,6 +1037,11 @@ class MatrixClient(nio.AsyncClient):
async def register_nio_event(
self, room: nio.MatrixRoom, ev: nio.Event, **fields,
) -> None:
"""Register a `nio.Event` as a `Event` object in our model.
`MatrixClient.register_nio_room` is called for the passed `room`
if neccessary before.
"""
await self.register_nio_room(room)