Kyoo/scanner/matcher/subscriber.py

63 lines
1.5 KiB
Python

import asyncio
from typing import Union, Literal
from msgspec import Struct, json
from logging import getLogger
from aio_pika.abc import AbstractIncomingMessage
from providers.rabbit_base import RabbitBase
from matcher.matcher import Matcher
logger = getLogger(__name__)
class Message(Struct, tag_field="action", tag=str.lower):
pass
class Scan(Message):
path: str
class Delete(Message):
path: str
class Refresh(Message):
kind: Literal["collection", "show", "movie", "season", "episode"]
id: str
decoder = json.Decoder(Union[Scan, Delete, Refresh])
class Subscriber(RabbitBase):
async def listen(self, matcher: Matcher):
async def on_message(message: AbstractIncomingMessage):
try:
msg = decoder.decode(message.body)
ack = False
match msg:
case Scan(path):
ack = await matcher.identify(path)
case Delete(path):
ack = await matcher.delete(path)
case Refresh(kind, id):
ack = await matcher.refresh(kind, id)
case _:
logger.error(f"Invalid action: {msg.action}")
if ack:
logger.info("finished processing %s", msg)
await message.ack()
else:
logger.warn("failed to process %s", msg)
await message.reject()
except Exception as e:
logger.exception("Unhandled error", exc_info=e)
await message.reject()
# Allow up to 20 scan requests to run in parallel on the same listener.
# Since most work is calling API not doing that is a waste.
await self._channel.set_qos(prefetch_count=20)
await self._queue.consume(on_message)
await asyncio.Future()