mirror of
https://github.com/jointakahe/takahe.git
synced 2024-11-13 02:41:08 +00:00
326 lines
10 KiB
Python
326 lines
10 KiB
Python
import datetime
|
|
from typing import Optional
|
|
|
|
import httpx
|
|
from django.db import models, transaction
|
|
from django.utils import timezone
|
|
|
|
from core.ld import canonicalise, get_str_or_id
|
|
from stator.models import State, StateField, StateGraph, StatorModel
|
|
from users.models.identity import Identity
|
|
|
|
|
|
class BlockStates(StateGraph):
|
|
new = State(try_interval=600)
|
|
sent = State(externally_progressed=True)
|
|
awaiting_expiry = State(try_interval=60 * 60, attempt_immediately=False)
|
|
undone = State(try_interval=60 * 60, delete_after=86400 * 7)
|
|
undone_sent = State(delete_after=86400)
|
|
|
|
new.transitions_to(sent)
|
|
new.transitions_to(awaiting_expiry)
|
|
sent.transitions_to(undone)
|
|
awaiting_expiry.transitions_to(undone)
|
|
# We don't really care if the other end accepts our block
|
|
new.times_out_to(sent, seconds=86400 * 7)
|
|
undone.transitions_to(undone_sent)
|
|
|
|
@classmethod
|
|
def group_active(cls):
|
|
return [cls.new, cls.sent, cls.awaiting_expiry]
|
|
|
|
@classmethod
|
|
async def handle_new(cls, instance: "Block"):
|
|
"""
|
|
Block that are new need us to deliver the Block object
|
|
to the target server.
|
|
"""
|
|
# Mutes don't send but might need expiry
|
|
if instance.mute:
|
|
return cls.awaiting_expiry
|
|
# Fetch more info
|
|
block = await instance.afetch_full()
|
|
# Remote blocks should not be here, local blocks just work
|
|
if not block.source.local or block.target.local:
|
|
return cls.sent
|
|
# Don't try if the other identity didn't fetch yet
|
|
if not block.target.inbox_uri:
|
|
return
|
|
# Sign it and send it
|
|
try:
|
|
await block.source.signed_request(
|
|
method="post",
|
|
uri=block.target.inbox_uri,
|
|
body=canonicalise(block.to_ap()),
|
|
)
|
|
except httpx.RequestError:
|
|
return
|
|
return cls.sent
|
|
|
|
@classmethod
|
|
async def handle_awaiting_expiry(cls, instance: "Block"):
|
|
"""
|
|
Checks to see if there is an expiry we should undo
|
|
"""
|
|
if instance.expires and instance.expires <= timezone.now():
|
|
return cls.undone
|
|
|
|
@classmethod
|
|
async def handle_undone(cls, instance: "Block"):
|
|
"""
|
|
Delivers the Undo object to the target server
|
|
"""
|
|
block = await instance.afetch_full()
|
|
# Remote blocks should not be here, mutes don't send, local blocks just work
|
|
if not block.source.local or block.target.local or instance.mute:
|
|
return cls.undone_sent
|
|
try:
|
|
await block.source.signed_request(
|
|
method="post",
|
|
uri=block.target.inbox_uri,
|
|
body=canonicalise(block.to_undo_ap()),
|
|
)
|
|
except httpx.RequestError:
|
|
return
|
|
return cls.undone_sent
|
|
|
|
|
|
class BlockQuerySet(models.QuerySet):
|
|
def active(self):
|
|
query = self.filter(state__in=BlockStates.group_active())
|
|
return query
|
|
|
|
|
|
class BlockManager(models.Manager):
|
|
def get_queryset(self):
|
|
return BlockQuerySet(self.model, using=self._db)
|
|
|
|
def active(self):
|
|
return self.get_queryset().active()
|
|
|
|
|
|
class Block(StatorModel):
|
|
"""
|
|
When one user (the source) mutes or blocks another (the target)
|
|
"""
|
|
|
|
state = StateField(BlockStates)
|
|
|
|
source = models.ForeignKey(
|
|
"users.Identity",
|
|
on_delete=models.CASCADE,
|
|
related_name="outbound_blocks",
|
|
)
|
|
|
|
target = models.ForeignKey(
|
|
"users.Identity",
|
|
on_delete=models.CASCADE,
|
|
related_name="inbound_blocks",
|
|
)
|
|
|
|
uri = models.CharField(blank=True, null=True, max_length=500)
|
|
|
|
# If it is a mute, we will stop delivering any activities from target to
|
|
# source, but we will still deliver activities from source to target.
|
|
# A full block (mute=False) stops activities both ways.
|
|
mute = models.BooleanField()
|
|
include_notifications = models.BooleanField(default=False)
|
|
|
|
expires = models.DateTimeField(blank=True, null=True)
|
|
note = models.TextField(blank=True, null=True)
|
|
|
|
created = models.DateTimeField(auto_now_add=True)
|
|
updated = models.DateTimeField(auto_now=True)
|
|
|
|
objects = BlockManager()
|
|
|
|
class Meta:
|
|
unique_together = [("source", "target", "mute")]
|
|
|
|
def __str__(self):
|
|
return f"#{self.id}: {self.source} blocks {self.target}"
|
|
|
|
### Alternate fetchers/constructors ###
|
|
|
|
@classmethod
|
|
def maybe_get(
|
|
cls, source, target, mute=False, require_active=False
|
|
) -> Optional["Block"]:
|
|
"""
|
|
Returns a Block if it exists between source and target
|
|
"""
|
|
try:
|
|
if require_active:
|
|
return cls.objects.active().get(source=source, target=target, mute=mute)
|
|
else:
|
|
return cls.objects.get(source=source, target=target, mute=mute)
|
|
except cls.DoesNotExist:
|
|
return None
|
|
|
|
@classmethod
|
|
def create_local_block(cls, source, target) -> "Block":
|
|
"""
|
|
Creates or updates a full Block from a local Identity to the target
|
|
(which can be local or remote).
|
|
"""
|
|
if not source.local:
|
|
raise ValueError("You cannot block from a remote Identity")
|
|
block = cls.maybe_get(source=source, target=target, mute=False)
|
|
if block is not None:
|
|
if not block.active:
|
|
block.state = BlockStates.new # type:ignore
|
|
block.save()
|
|
else:
|
|
with transaction.atomic():
|
|
block = cls.objects.create(
|
|
source=source,
|
|
target=target,
|
|
mute=False,
|
|
)
|
|
block.uri = source.actor_uri + f"block/{block.pk}/"
|
|
block.save()
|
|
return block
|
|
|
|
@classmethod
|
|
def create_local_mute(
|
|
cls,
|
|
source,
|
|
target,
|
|
duration=None,
|
|
include_notifications=False,
|
|
) -> "Block":
|
|
"""
|
|
Creates or updates a muting Block from a local Identity to the target
|
|
(which can be local or remote).
|
|
"""
|
|
if not source.local:
|
|
raise ValueError("You cannot mute from a remote Identity")
|
|
block = cls.maybe_get(source=source, target=target, mute=True)
|
|
if block is not None:
|
|
if not block.active:
|
|
block.state = BlockStates.new # type:ignore
|
|
if duration:
|
|
block.expires = timezone.now() + datetime.timedelta(seconds=duration)
|
|
block.include_notifications = include_notifications
|
|
block.save()
|
|
else:
|
|
with transaction.atomic():
|
|
block = cls.objects.create(
|
|
source=source,
|
|
target=target,
|
|
mute=True,
|
|
include_notifications=include_notifications,
|
|
expires=(
|
|
timezone.now() + datetime.timedelta(seconds=duration)
|
|
if duration
|
|
else None
|
|
),
|
|
)
|
|
block.uri = source.actor_uri + f"block/{block.pk}/"
|
|
block.save()
|
|
return block
|
|
|
|
### Properties ###
|
|
|
|
@property
|
|
def active(self):
|
|
return self.state in BlockStates.group_active()
|
|
|
|
### Async helpers ###
|
|
|
|
async def afetch_full(self):
|
|
"""
|
|
Returns a version of the object with all relations pre-loaded
|
|
"""
|
|
return await Block.objects.select_related(
|
|
"source", "source__domain", "target"
|
|
).aget(pk=self.pk)
|
|
|
|
### ActivityPub (outbound) ###
|
|
|
|
def to_ap(self):
|
|
"""
|
|
Returns the AP JSON for this object
|
|
"""
|
|
if self.mute:
|
|
raise ValueError("Cannot send mutes over ActivityPub")
|
|
return {
|
|
"type": "Block",
|
|
"id": self.uri,
|
|
"actor": self.source.actor_uri,
|
|
"object": self.target.actor_uri,
|
|
}
|
|
|
|
def to_undo_ap(self):
|
|
"""
|
|
Returns the AP JSON for this objects' undo.
|
|
"""
|
|
return {
|
|
"type": "Undo",
|
|
"id": self.uri + "#undo",
|
|
"actor": self.source.actor_uri,
|
|
"object": self.to_ap(),
|
|
}
|
|
|
|
### ActivityPub (inbound) ###
|
|
|
|
@classmethod
|
|
def by_ap(cls, data: str | dict, create=False) -> "Block":
|
|
"""
|
|
Retrieves a Block instance by its ActivityPub JSON object or its URI.
|
|
|
|
Optionally creates one if it's not present.
|
|
Raises KeyError if it's not found and create is False.
|
|
"""
|
|
# If it's a string, do the reference resolve
|
|
if isinstance(data, str):
|
|
bits = data.strip("/").split("/")
|
|
if bits[-2] != "block":
|
|
raise ValueError(f"Unknown Block object URI: {data}")
|
|
return Block.objects.get(pk=bits[-1])
|
|
# Otherwise, do the object resolve
|
|
else:
|
|
# Resolve source and target and see if a Block exists
|
|
source = Identity.by_actor_uri(data["actor"], create=create)
|
|
target = Identity.by_actor_uri(get_str_or_id(data["object"]))
|
|
block = cls.maybe_get(source=source, target=target, mute=False)
|
|
# If it doesn't exist, create one in the sent state
|
|
if block is None:
|
|
if create:
|
|
return cls.objects.create(
|
|
source=source,
|
|
target=target,
|
|
uri=data["id"],
|
|
mute=False,
|
|
state=BlockStates.sent,
|
|
)
|
|
else:
|
|
raise cls.DoesNotExist(
|
|
f"No block with source {source} and target {target}", data
|
|
)
|
|
else:
|
|
return block
|
|
|
|
@classmethod
|
|
def handle_ap(cls, data):
|
|
"""
|
|
Handles an incoming Block notification
|
|
"""
|
|
with transaction.atomic():
|
|
cls.by_ap(data, create=True)
|
|
|
|
@classmethod
|
|
def handle_undo_ap(cls, data):
|
|
"""
|
|
Handles an incoming Block Undo
|
|
"""
|
|
# Resolve source and target and see if a Follow exists (it hopefully does)
|
|
try:
|
|
block = cls.by_ap(data["object"])
|
|
except KeyError:
|
|
raise ValueError("No Block locally for incoming Undo", data)
|
|
# Check the block's source is the actor
|
|
if data["actor"] != block.source.actor_uri:
|
|
raise ValueError("Undo actor does not match its Block object", data)
|
|
# Delete the follow
|
|
block.delete()
|