125 lines
4.5 KiB
Python
125 lines
4.5 KiB
Python
# Copyright 2026 Logan Fick
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Business logic for managing room stream subscriptions."""
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import re
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from typing import TYPE_CHECKING
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from urllib.parse import urlparse
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from .types import (
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InvalidOwncastInstanceError,
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RoomSubscription,
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)
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if TYPE_CHECKING:
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import logging
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from .owncast_client import OwncastClient
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from .repository import SubscriptionRepository
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_DOMAIN_CLEANUP_RE = re.compile(r"[^a-z0-9.-]")
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def _domainify(url: str) -> str:
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"""Extract and sanitize a domain from user input."""
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url = url.strip()
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if "@" in url:
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url = url.rsplit("@", 1)[1]
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if not url.startswith(("http://", "https://", "//")):
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url = f"//{url}"
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parsed = urlparse(url)
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domain = (parsed.netloc or parsed.path).lower()
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domain = domain.partition(":")[0].partition("/")[0]
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return _DOMAIN_CLEANUP_RE.sub("", domain).strip(".-")
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class SubscriptionManager:
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"""Coordinates subscription use cases between handlers and repositories."""
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def __init__(
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self,
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owncast_client: OwncastClient,
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subscription_repo: SubscriptionRepository,
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logger: logging.Logger,
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) -> None:
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"""Initialize the subscription manager."""
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self.owncast_client = owncast_client
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self.subscription_repo = subscription_repo
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self.log = logger
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async def subscribe(self, room_id: str, url: str) -> str:
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"""Subscribe a room to stream notifications and return the stream domain.
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First subscriptions validate the remote Owncast instance before the
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subscription insert creates the shared stream row through SQLite.
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:param room_id: Matrix room ID to subscribe.
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:param url: User-supplied Owncast URL, domain, or Fediverse-style address.
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:return: Normalized stream domain.
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:raises InvalidOwncastInstanceError: If first-time validation fails.
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:raises AlreadySubscribedError: If the room is already subscribed.
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"""
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stream_domain = _domainify(url)
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is_new_domain = not await self.subscription_repo.has_domain_subscriptions(
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stream_domain
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)
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if is_new_domain:
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is_valid = await self.owncast_client.validate_instance(stream_domain)
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if not is_valid:
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raise InvalidOwncastInstanceError(stream_domain)
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await self.subscription_repo.add(stream_domain, room_id)
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if is_new_domain:
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self.log.info("[%s] Discovered new stream!", stream_domain)
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self.log.info("[%s] Subscription added for room %s.", stream_domain, room_id)
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return stream_domain
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async def unsubscribe(self, room_id: str, url: str) -> str:
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"""Remove a room subscription and return the stream domain.
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When this removes the last subscription for a stream, SQLite deletes the
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stream row through the subscription cleanup trigger.
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:param room_id: Matrix room ID to unsubscribe.
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:param url: User-supplied Owncast URL, domain, or Fediverse-style address.
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:return: Normalized stream domain.
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:raises NotSubscribedError: If no subscription was removed.
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"""
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stream_domain = _domainify(url)
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await self.subscription_repo.remove(stream_domain, room_id)
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self.log.info("[%s] Subscription removed for room %s.", stream_domain, room_id)
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return stream_domain
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async def list_room_subscriptions(self, room_id: str) -> list[RoomSubscription]:
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"""Return stream subscriptions for a room with display state attached."""
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return await self.subscription_repo.get_room_subscriptions(room_id)
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async def has_room_subscriptions(self, room_id: str) -> bool:
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"""Return whether the room has any stream subscriptions."""
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return await self.subscription_repo.has_room_subscriptions(room_id)
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async def list_live_room_subscriptions(
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self, room_id: str
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) -> list[RoomSubscription]:
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"""Return only currently online stream subscriptions for a room."""
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return await self.subscription_repo.get_live_room_subscriptions(room_id)
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