import mf2py # type: ignore from app import activitypub as ap from app import webfinger from app.actor import Actor from app.actor import fetch_actor from app.ap_object import RemoteObject from app.database import AsyncSession async def lookup(db_session: AsyncSession, query: str) -> Actor | RemoteObject: if query.startswith("@"): query = await webfinger.get_actor_url(query) # type: ignore # None check below if not query: raise ap.NotAnObjectError(query) try: ap_obj = await ap.fetch(query) except ap.NotAnObjectError as not_an_object_error: resp = not_an_object_error.resp if not resp: raise ap.NotAnObjectError(query) alternate_obj = None if resp.headers.get("content-type", "").startswith("text/html"): for alternate in mf2py.parse(doc=resp.text).get("alternates", []): if alternate.get("type") == "application/activity+json": alternate_obj = await ap.fetch(alternate["url"]) if alternate_obj: ap_obj = alternate_obj else: raise if ap.as_list(ap_obj["type"])[0] in ap.ACTOR_TYPES: actor = await fetch_actor(db_session, ap_obj["id"]) return actor else: return await RemoteObject.from_raw_object(ap_obj)