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matrix_queue_proc
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# Matrix Queue Processor (matrix_queue_proc)
This is a quickly-thrown-together script which will:
- retrieve unread text messages in a [Matrix](https://matrix.org) room
- execute a script of your choice for each one
- mark (✅ reaction) or redact those messages on success (0); or
- reply with the process's exit code on failure.
- exit once all those messages are processed.
- (it is currently intended for occasional usage rather than continuous usage, but continuous usage may appear in the future.)
## Use cases
- archiving (youtube-dl, archivebox, etc...)
- e.g. using the 'Share' function on a mobile phone to enqueue links
## Usage
```
python3 mxqueueproc.py <room ID> <command to run>
```
If you prefer messages to be **redacted** rather than **✅-reacted**, use
```
MXQP_REDACT=1 python3 mxqueueproc.py <room ID> <command to run>
```
e.g.
`python3 mxqueueproc.py !some_room_id:example.com youtube-dl`
### Installation and set-up
* Set up a Python 3 virtual environment `python3 -m venv path/to/venv`
* Activate it! `. path/to/env/activate`
* Install requirements `pip install -r requirements.txt`
* Activate this venv again whenever you wish to run mxqueueproc.
On first run, Matrix Queue Processor will guide you through a login.
You will need:
* your homeserver URL (e.g. `https://matrix.org`)
* your username (e.g. `reivilibre`)
* your password (e.g. `nottellingYOUofcourse`)
### For more advanced commands
For more complicated commands, it may be worthwhile (or even required) to create e.g. a bash script
```bash
#!/bin/bash
set -eu
task=$1
do_something --serious-business --wow=very $1
```
(`set -eu` makes undefined variables and command errors cause failure, so that the bot will report it to you.)
Don't forget to mark it as executable.

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# Copyright 2021 Olivier 'reivilibre'
# This file is part of https://bics.ga/reivilibre/matrix_queue_proc
#
# 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.
import asyncio
import json
import os
import subprocess
import sys
from asyncio import Semaphore
from getpass import getpass
from pathlib import Path
from typing import Union, List
from nio import (
AsyncClient,
AsyncClientConfig,
LoginResponse,
LoginError,
SyncResponse,
RoomGetStateError,
RoomGetStateResponse,
RoomGetStateEventError,
RoomGetStateEventResponse,
RoomContextError,
RoomContextResponse,
BadEvent,
Event,
UnknownBadEvent,
MegolmEvent,
EncryptionError,
RoomMessageText,
RoomMessageNotice,
MessageDirection,
RoomMessagesError,
RoomMessagesResponse,
)
from nio.client.async_client import ResponseCb
from nio.store import SqliteStore
class QueueProcBot:
def __init__(self, data_path: Path):
self.client: AsyncClient = None # type: ignore
self.data_path = data_path
self._sync_forever_task = None
data_path.mkdir(exist_ok=True)
async def connect(self):
cconfig = AsyncClientConfig(
# store=SqliteStore
)
login_info_path = Path(self.data_path, "login_info.json")
reusing_login = login_info_path.exists()
user_id = None
username = None
password = None
access_token = None
device_id = None
if reusing_login:
print(f"Reusing connection from {login_info_path}.", file=sys.stderr)
with open(login_info_path, "r") as fin:
login_info = json.load(fin)
homeserver = login_info["homeserver"]
user_id = login_info["user_id"]
access_token = login_info["access_token"]
device_id = login_info["device_id"]
else:
print("New connection.")
homeserver = input("Enter homeserver such as https://matrix.org: ")
username = input("Enter username: ")
password = getpass("Enter Matrix password")
store_path = Path(self.data_path, "nio_store")
store_path.mkdir(exist_ok=True)
self.client = AsyncClient(
homeserver, user_id or username, store_path=store_path, config=cconfig
)
if reusing_login:
self.client.restore_login(user_id, device_id, access_token)
return True
else:
lrp = await self.client.login(
password, device_name="Matrix Queue Processor"
)
if isinstance(lrp, LoginResponse):
login_info = {
"homeserver": homeserver,
"user_id": lrp.user_id,
"device_id": lrp.device_id,
"access_token": lrp.access_token,
}
with open(login_info_path, "w") as fout:
print("Saving login information.", file=sys.stderr)
json.dump(login_info, fout)
return True
elif isinstance(lrp, LoginError):
print(f"Error logging in\n\t{lrp}", file=sys.stderr)
return False
async def startup(self):
monitor = Semaphore(value=0)
resp_cb = None
async def good_to_go(_resp):
print("Synced!")
monitor.release()
self.client.response_callbacks.remove(resp_cb)
resp_cb = ResponseCb(good_to_go, SyncResponse)
self.client.response_callbacks.append(resp_cb)
self._sync_forever_task = asyncio.create_task(self.client.sync_forever())
await monitor.acquire()
async def process_events(
self,
events: List[Union[Event, BadEvent, UnknownBadEvent]],
program: str,
room_id: str,
delete_on_success: bool,
):
for event in events:
# print(event.event_id, event.__class__.__name__)
if isinstance(event, MegolmEvent):
print("!!! Megolm Event :(", event.event_id)
try:
await asyncio.sleep(2)
print(self.client.decrypt_event(event))
except EncryptionError:
print("failed to decrypt")
elif isinstance(event, RoomMessageText):
text = event.body
print(f"Task: {text}")
exit_code = await asyncio.get_event_loop().run_in_executor(
None, subprocess.call, [program, text]
)
if exit_code == 0:
if delete_on_success:
await self.client.room_send(
room_id,
"m.reaction",
{
"m.relates_to": {
"rel_type": "m.annotation",
"event_id": event.event_id,
"key": "✅",
}
},
ignore_unverified_devices=True,
)
else:
await self.client.room_redact(room_id, event.event_id)
else:
await self.client.room_send(
room_id,
"m.room.message",
{
"m.relates_to": {
"m.in_reply_to": {"event_id": event.event_id}
},
"msgtype": "m.notice",
"body": f"Failed with exit code {exit_code}.",
},
)
# update our marker
await self.client.room_read_markers(
room_id, event.event_id, event.event_id
)
# cooldown.
await asyncio.sleep(5)
async def catch_up(self, room_id: str, program: str, delete_on_success: bool):
room = self.client.rooms[room_id]
start_at = room.fully_read_marker
if start_at is None:
print("No fully read marker")
room_creation_event = await self.client.room_get_state_event(
room_id, "m.room.create"
)
if isinstance(room_creation_event, RoomGetStateEventError):
raise RuntimeError(str(room_creation_event))
assert isinstance(room_creation_event, RoomGetStateEventResponse)
start_at = room_creation_event.content["event_id"]
print("Starting at: ", start_at)
context = await self.client.room_context(room_id, start_at)
if isinstance(context, RoomContextError):
raise RuntimeError(str(context))
assert isinstance(context, RoomContextResponse)
await self.process_events(
context.events_after, program, room_id, delete_on_success
)
next_batch = context.end
while True:
messages = await self.client.room_messages(
room_id,
next_batch,
direction=MessageDirection.front,
)
if isinstance(messages, RoomMessagesError):
raise RuntimeError(str(messages))
assert isinstance(messages, RoomMessagesResponse)
next_batch = messages.end
if len(messages.chunk) == 0:
break
await self.process_events(messages.chunk, program, room_id)
if __name__ == "__main__":
if len(sys.argv) < 3:
print("Usage: mxprocqueue.py <room_id> <processing script>")
print("Set MXQP_REDACT=1 to redact messages on success.")
sys.exit(127)
room_id = sys.argv[1]
command = sys.argv[2]
bot = QueueProcBot(Path("./queueprocdata")) # TODO configurability
async def main():
print("Logging in...")
await bot.connect()
print("Syncing...")
await bot.startup()
print("Catching up...")
delete_on_success = os.environ.get("MXQP_REDACT") == "1"
await bot.catch_up(room_id, command, delete_on_success)
print("Done?")
asyncio.get_event_loop().run_until_complete(main())

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matrix-nio[e2e]