"""No-op stub services.

Cross-app calls now go over HTTP via call_action() / fetch_data().
Stubs are no longer needed for the 4 main domains (blog, calendar,
market, cart).  Only StubFederationService remains as a safety net
for apps that conditionally load AP infrastructure.
"""
from __future__ import annotations


class StubFederationService:
    """No-op federation stub for apps that don't load AP."""

    async def get_actor_by_username(self, session, username):
        return None

    async def get_actor_by_user_id(self, session, user_id):
        return None

    async def publish_activity(self, session, *, actor_user_id, activity_type,
                               object_type, object_data, source_type=None,
                               source_id=None):
        return None

    async def get_activity_for_source(self, session, source_type, source_id):
        return None

    async def count_activities_for_source(self, session, source_type, source_id, *, activity_type):
        return 0

    async def get_stats(self, session):
        return {"actors": 0, "activities": 0, "followers": 0}