notifier/resolvers/listener.py

from orm.notification import Notification
from resolvers.model import NotificationReaction, NotificationAuthor, NotificationShout
from services.db import local_session
from services.rediscache import redis
import asyncio


class ServiceMessage:
    action: str
    entity: str
    payload: NotificationReaction | NotificationAuthor | NotificationShout


async def handle_notification(n: ServiceMessage, channel: str):
    """создаеёт новое хранимое уведомление"""
    with local_session() as session:
        try:
            if channel.startswith("follower:"):
                author_id = int(channel.split(":")[1])
                if isinstance(n.payload, NotificationAuthor):
                    n.payload.following_id = author_id
            n = Notification(action=n.action, entity=n.entity, payload=n.payload)
            session.add(n)
            session.commit()
        except Exception as e:
            session.rollback()
            print(f"[listener.handle_reaction] error: {str(e)}")


async def listen_task(pattern):
    async for message_data, channel in redis.listen(pattern):
        try:
            notification_message = ServiceMessage(**message_data)
            await handle_notification(notification_message, str(channel))
        except Exception as e:
            print(f"[listener.listen_task] Error processing notification: {str(e)}")


async def notifications_worker():
    # Use asyncio.gather to run tasks concurrently
    await asyncio.gather(listen_task("follower:*"), listen_task("reaction"), listen_task("shout"))