takahe/users/models/inbox_message.py
2023-01-01 13:10:54 -07:00

195 lines
8.1 KiB
Python

from asgiref.sync import sync_to_async
from django.db import models
from stator.models import State, StateField, StateGraph, StatorModel
class InboxMessageStates(StateGraph):
received = State(try_interval=300)
processed = State(externally_progressed=True)
purge = State(try_interval=300)
purged = State() # Not actually real, nothing gets here
received.transitions_to(processed)
processed.times_out_to(purge, 86400 * 1)
received.times_out_to(purge, 86400 * 3)
purge.transitions_to(purged)
@classmethod
async def handle_received(cls, instance: "InboxMessage"):
from activities.models import Post, PostInteraction
from users.models import Follow, Identity, Report
match instance.message_type:
case "follow":
await sync_to_async(Follow.handle_request_ap)(instance.message)
case "announce":
await sync_to_async(PostInteraction.handle_ap)(instance.message)
case "like":
await sync_to_async(PostInteraction.handle_ap)(instance.message)
case "create":
match instance.message_object_type:
case "note":
await sync_to_async(Post.handle_create_ap)(instance.message)
case "question":
pass # Drop for now
case unknown:
if unknown in Post.Types.names:
await sync_to_async(Post.handle_create_ap)(instance.message)
else:
raise ValueError(
f"Cannot handle activity of type create.{unknown}"
)
case "update":
match instance.message_object_type:
case "note":
await sync_to_async(Post.handle_update_ap)(instance.message)
case "person":
await sync_to_async(Identity.handle_update_ap)(instance.message)
case "service":
await sync_to_async(Identity.handle_update_ap)(instance.message)
case "group":
await sync_to_async(Identity.handle_update_ap)(instance.message)
case "organization":
await sync_to_async(Identity.handle_update_ap)(instance.message)
case "application":
await sync_to_async(Identity.handle_update_ap)(instance.message)
case "question":
pass # Drop for now
case unknown:
if unknown in Post.Types.names:
await sync_to_async(Post.handle_update_ap)(instance.message)
else:
raise ValueError(
f"Cannot handle activity of type update.{unknown}"
)
case "accept":
match instance.message_object_type:
case "follow":
await sync_to_async(Follow.handle_accept_ap)(instance.message)
case None:
await sync_to_async(Follow.handle_accept_ref_ap)(
instance.message
)
case unknown:
raise ValueError(
f"Cannot handle activity of type accept.{unknown}"
)
case "reject":
match instance.message_object_type:
case "follow":
await sync_to_async(Follow.handle_reject_ap)(instance.message)
case unknown:
raise ValueError(
f"Cannot handle activity of type reject.{unknown}"
)
case "undo":
match instance.message_object_type:
case "follow":
await sync_to_async(Follow.handle_undo_ap)(instance.message)
case "like":
await sync_to_async(PostInteraction.handle_undo_ap)(
instance.message
)
case "announce":
await sync_to_async(PostInteraction.handle_undo_ap)(
instance.message
)
case unknown:
raise ValueError(
f"Cannot handle activity of type undo.{unknown}"
)
case "delete":
# If there is no object type, we need to see if it's a profile or a post
if not isinstance(instance.message["object"], dict):
if await Identity.objects.filter(
actor_uri=instance.message["object"]
).aexists():
await sync_to_async(Identity.handle_delete_ap)(instance.message)
elif await Post.objects.filter(
object_uri=instance.message["object"]
).aexists():
await sync_to_async(Post.handle_delete_ap)(instance.message)
else:
# It is presumably already deleted
pass
else:
match instance.message_object_type:
case "tombstone":
await sync_to_async(Post.handle_delete_ap)(instance.message)
case "note":
await sync_to_async(Post.handle_delete_ap)(instance.message)
case unknown:
raise ValueError(
f"Cannot handle activity of type delete.{unknown}"
)
case "add":
# We are ignoring these right now (probably pinned items)
pass
case "remove":
# We are ignoring these right now (probably pinned items)
pass
case "move":
# We're ignoring moves for now
pass
case "http://litepub.social/ns#emojireact":
# We're ignoring emoji reactions for now
pass
case "flag":
# Received reports
await sync_to_async(Report.handle_ap)(instance.message)
case "__internal__":
match instance.message_object_type:
case "fetchpost":
await sync_to_async(Post.handle_fetch_internal)(
instance.message
)
case unknown:
raise ValueError(
f"Cannot handle activity of type __internal__.{unknown}"
)
case unknown:
raise ValueError(f"Cannot handle activity of type {unknown}")
return cls.processed
@classmethod
async def handle_purge(cls, instance: "InboxMessage"):
"""
Just delete them!
"""
await InboxMessage.objects.filter(pk=instance.pk).adelete()
class InboxMessage(StatorModel):
"""
an incoming inbox message that needs processing.
Yes, this is kind of its own message queue built on the state graph system.
It's fine. It'll scale up to a decent point.
"""
message = models.JSONField()
state = StateField(InboxMessageStates)
@property
def message_type(self):
return self.message["type"].lower()
@property
def message_object_type(self) -> str | None:
if isinstance(self.message["object"], dict):
return self.message["object"]["type"].lower()
else:
return None
@property
def message_type_full(self):
if isinstance(self.message.get("object"), dict):
return f"{self.message_type}.{self.message_object_type}"
else:
return f"{self.message_type}"
@property
def message_actor(self):
return self.message.get("actor")