kopia lustrzana https://github.com/jointakahe/takahe
141 wiersze
4.7 KiB
Python
141 wiersze
4.7 KiB
Python
import httpx
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from asgiref.sync import async_to_sync
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from activities.models import Hashtag, Post
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from core.ld import canonicalise
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from users.models import Domain, Identity, IdentityStates
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from users.models.system_actor import SystemActor
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class SearchService:
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"""
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Captures the logic needed to search - reused in the UI and API
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"""
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def __init__(self, query: str, identity: Identity | None):
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self.query = query.strip()
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self.identity = identity
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def search_identities_handle(self) -> set[Identity]:
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"""
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Searches for identities by their handles
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"""
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# Short circuit if it's obviously not for us
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if "://" in self.query:
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return set()
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# Try to fetch the user by handle
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handle = self.query.lstrip("@")
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results: set[Identity] = set()
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if "@" in handle:
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username, domain = handle.split("@", 1)
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# Resolve the domain to the display domain
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domain_instance = Domain.get_domain(domain)
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try:
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if domain_instance is None:
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raise Identity.DoesNotExist()
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identity = Identity.objects.get(
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domain=domain_instance,
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username__iexact=username,
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)
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except Identity.DoesNotExist:
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identity = None
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if self.identity is not None:
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try:
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# Allow authenticated users to fetch remote
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identity = Identity.by_username_and_domain(
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username, domain_instance or domain, fetch=True
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)
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if identity and identity.state == IdentityStates.outdated:
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async_to_sync(identity.fetch_actor)()
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except ValueError:
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pass
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if identity:
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results.add(identity)
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else:
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for identity in Identity.objects.filter(username=handle)[:20]:
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results.add(identity)
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for identity in Identity.objects.filter(username__istartswith=handle)[:20]:
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results.add(identity)
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return results
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def search_url(self) -> Post | Identity | None:
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"""
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Searches for an identity or post by URL.
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"""
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# Short circuit if it's obviously not for us
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if "://" not in self.query:
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return None
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# Fetch the provided URL as the system actor to retrieve the AP JSON
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try:
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response = async_to_sync(SystemActor().signed_request)(
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method="get",
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uri=self.query,
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)
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except httpx.RequestError:
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return None
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if response.status_code >= 400:
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return None
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document = canonicalise(response.json(), include_security=True)
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type = document.get("type", "unknown").lower()
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# Is it an identity?
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if type in Identity.ACTOR_TYPES:
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# Try and retrieve the profile by actor URI
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identity = Identity.by_actor_uri(document["id"], create=True)
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if identity and identity.state == IdentityStates.outdated:
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async_to_sync(identity.fetch_actor)()
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return identity
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# Is it a post?
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elif type in [value.lower() for value in Post.Types.values]:
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# Try and retrieve the post by URI
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# (we do not trust the JSON we just got - fetch from source!)
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try:
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return Post.by_object_uri(document["id"], fetch=True)
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except Post.DoesNotExist:
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return None
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# Dunno what it is
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else:
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return None
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def search_hashtags(self) -> set[Hashtag]:
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"""
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Searches for hashtags by their name
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"""
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# Short circuit out if it's obviously not a hashtag
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if "@" in self.query or "://" in self.query:
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return set()
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results: set[Hashtag] = set()
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name = self.query.lstrip("#").lower()
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for hashtag in Hashtag.objects.public().hashtag_or_alias(name)[:10]:
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results.add(hashtag)
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for hashtag in Hashtag.objects.public().filter(hashtag__startswith=name)[:10]:
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results.add(hashtag)
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return results
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def search_all(self):
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"""
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Returns all possible results for a search
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"""
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results = {
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"identities": self.search_identities_handle(),
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"hashtags": self.search_hashtags(),
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"posts": set(),
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}
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url_result = self.search_url()
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if isinstance(url_result, Identity):
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results["identities"].add(url_result)
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if isinstance(url_result, Post):
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results["posts"].add(url_result)
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return results
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