kopia lustrzana https://github.com/jointakahe/takahe
72 wiersze
2.2 KiB
Python
72 wiersze
2.2 KiB
Python
from asgiref.sync import sync_to_async
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from django.db import models
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from stator.models import State, StateField, StateGraph, StatorModel
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from users.models import Follow, Identity
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class InboxMessageStates(StateGraph):
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received = State(try_interval=300)
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processed = State()
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received.transitions_to(processed)
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@classmethod
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async def handle_received(cls, instance: "InboxMessage"):
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type = instance.message["type"].lower()
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if type == "follow":
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await instance.follow_request()
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elif type == "accept":
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inner_type = instance.message["object"]["type"].lower()
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if inner_type == "follow":
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await instance.follow_accepted()
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else:
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raise ValueError(f"Cannot handle activity of type accept.{inner_type}")
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elif type == "undo":
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inner_type = instance.message["object"]["type"].lower()
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if inner_type == "follow":
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await instance.follow_undo()
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else:
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raise ValueError(f"Cannot handle activity of type undo.{inner_type}")
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else:
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raise ValueError(f"Cannot handle activity of type {type}")
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class InboxMessage(StatorModel):
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"""
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an incoming inbox message that needs processing.
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Yes, this is kind of its own message queue built on the state graph system.
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It's fine. It'll scale up to a decent point.
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"""
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message = models.JSONField()
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state = StateField(InboxMessageStates)
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@sync_to_async
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def follow_request(self):
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"""
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Handles an incoming follow request
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"""
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Follow.remote_created(
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source=Identity.by_actor_uri_with_create(self.message["actor"]),
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target=Identity.by_actor_uri(self.message["object"]),
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uri=self.message["id"],
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)
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@sync_to_async
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def follow_accepted(self):
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"""
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Handles an incoming acceptance of one of our follow requests
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"""
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Follow.remote_accepted(
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source=Identity.by_actor_uri_with_create(self.message["actor"]),
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target=Identity.by_actor_uri(self.message["object"]),
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)
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async def follow_undo(self):
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"""
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Handles an incoming follow undo
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"""
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