core/services/notify.py

import json

from orm.notification import Notification
from services.db import local_session
from utils.logger import root_logger as logger
from cache.rediscache import redis


def save_notification(action: str, entity: str, payload):
    with local_session() as session:
        n = Notification(action=action, entity=entity, payload=payload)
        session.add(n)
        session.commit()


async def notify_reaction(reaction, action: str = "create"):
    channel_name = "reaction"
    data = {"payload": reaction, "action": action}
    try:
        save_notification(action, channel_name, data.get("payload"))
        await redis.publish(channel_name, json.dumps(data))
    except Exception as e:
        logger.error(f"Failed to publish to channel {channel_name}: {e}")


async def notify_shout(shout, action: str = "update"):
    channel_name = "shout"
    data = {"payload": shout, "action": action}
    try:
        save_notification(action, channel_name, data.get("payload"))
        await redis.publish(channel_name, json.dumps(data))
    except Exception as e:
        logger.error(f"Failed to publish to channel {channel_name}: {e}")


async def notify_follower(follower: dict, author_id: int, action: str = "follow"):
    channel_name = f"follower:{author_id}"
    try:
        # Simplify dictionary before publishing
        simplified_follower = {k: follower[k] for k in ["id", "name", "slug", "pic"]}
        data = {"payload": simplified_follower, "action": action}
        # save in channel
        save_notification(action, channel_name, data.get("payload"))

        # Convert data to JSON string
        json_data = json.dumps(data)

        # Ensure the data is not empty before publishing
        if json_data:
            # Use the 'await' keyword when publishing
            await redis.publish(channel_name, json_data)

    except Exception as e:
        # Log the error and re-raise it
        logger.error(f"Failed to publish to channel {channel_name}: {e}")