326 lines
12 KiB
Python
326 lines
12 KiB
Python
import httpx
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from django.db import models
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from activities.models.timeline_event import TimelineEvent
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from core.ld import canonicalise
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from stator.models import State, StateField, StateGraph, StatorModel
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from users.models import Block, FollowStates
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class FanOutStates(StateGraph):
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new = State(try_interval=600)
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sent = State(delete_after=86400)
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skipped = State(delete_after=86400)
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failed = State(delete_after=86400)
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new.transitions_to(sent)
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new.transitions_to(skipped)
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new.times_out_to(failed, seconds=86400 * 3)
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@classmethod
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def handle_new(cls, instance: "FanOut"):
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"""
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Sends the fan-out to the right inbox.
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"""
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# Don't try to fan out to identities that are not fetched yet
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if not (instance.identity.local or instance.identity.inbox_uri):
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return
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match (instance.type, instance.identity.local):
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# Handle creating/updating local posts
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case ((FanOut.Types.post | FanOut.Types.post_edited), True):
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post = instance.subject_post
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# If the author of the post is blocked or muted, skip out
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if (
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Block.objects.active()
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.filter(source=instance.identity, target=post.author)
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.exists()
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):
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return cls.skipped
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# Make a timeline event directly
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# If it's a reply, we only add it if we follow at least one
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# of the people mentioned AND the author, or we're mentioned,
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# or it's a reply to us or the author
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add = True
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mentioned = {identity.id for identity in post.mentions.all()}
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if post.in_reply_to:
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followed = set(
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instance.identity.outbound_follows.filter(
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state__in=FollowStates.group_active()
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).values_list("target_id", flat=True)
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)
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interested_in = followed.union(
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{post.author_id, instance.identity_id}
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)
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add = (post.author_id in followed) and (
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bool(mentioned.intersection(interested_in))
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)
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if add:
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TimelineEvent.add_post(
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identity=instance.identity,
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post=post,
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)
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# We might have been mentioned
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if (
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instance.identity.id in mentioned
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and instance.identity_id != post.author_id
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):
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TimelineEvent.add_mentioned(
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identity=instance.identity,
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post=post,
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)
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# Handle sending remote posts create
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case (FanOut.Types.post, False):
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post = instance.subject_post
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# Sign it and send it
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try:
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post.author.signed_request(
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method="post",
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uri=(
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instance.identity.shared_inbox_uri
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or instance.identity.inbox_uri
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),
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body=canonicalise(post.to_create_ap()),
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)
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except httpx.RequestError:
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return
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# Handle sending remote posts update
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case (FanOut.Types.post_edited, False):
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post = instance.subject_post
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# Sign it and send it
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try:
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post.author.signed_request(
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method="post",
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uri=(
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instance.identity.shared_inbox_uri
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or instance.identity.inbox_uri
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),
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body=canonicalise(post.to_update_ap()),
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)
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except httpx.RequestError:
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return
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# Handle deleting local posts
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case (FanOut.Types.post_deleted, True):
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post = instance.subject_post
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if instance.identity.local:
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# Remove all timeline events mentioning it
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TimelineEvent.objects.filter(
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identity=instance.identity,
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subject_post=post,
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).delete()
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# Handle sending remote post deletes
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case (FanOut.Types.post_deleted, False):
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post = instance.subject_post
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# Send it to the remote inbox
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try:
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post.author.signed_request(
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method="post",
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uri=(
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instance.identity.shared_inbox_uri
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or instance.identity.inbox_uri
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),
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body=canonicalise(post.to_delete_ap()),
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)
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except httpx.RequestError:
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return
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# Handle local boosts/likes
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case (FanOut.Types.interaction, True):
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interaction = instance.subject_post_interaction
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# If the author of the interaction is blocked or their notifications
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# are muted, skip out
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if (
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Block.objects.active()
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.filter(
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models.Q(mute=False) | models.Q(include_notifications=True),
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source=instance.identity,
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target=interaction.identity,
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)
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.exists()
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):
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return cls.skipped
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# If blocked/muted the underlying post author, skip out
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if (
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Block.objects.active()
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.filter(
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source=instance.identity,
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target_id=interaction.post.author_id,
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)
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.exists()
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):
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return cls.skipped
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# Make a timeline event directly
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TimelineEvent.add_post_interaction(
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identity=instance.identity,
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interaction=interaction,
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)
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# Handle sending remote boosts/likes/votes/pins
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case (FanOut.Types.interaction, False):
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interaction = instance.subject_post_interaction
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# Send it to the remote inbox
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try:
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if interaction.type == interaction.Types.vote:
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body = interaction.to_create_ap()
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elif interaction.type == interaction.Types.pin:
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body = interaction.to_add_ap()
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else:
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body = interaction.to_ap()
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interaction.identity.signed_request(
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method="post",
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uri=(
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instance.identity.shared_inbox_uri
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or instance.identity.inbox_uri
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),
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body=canonicalise(body),
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)
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except httpx.RequestError:
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return
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# Handle undoing local boosts/likes
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case (FanOut.Types.undo_interaction, True): # noqa:F841
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interaction = instance.subject_post_interaction
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# Delete any local timeline events
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TimelineEvent.delete_post_interaction(
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identity=instance.identity,
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interaction=interaction,
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)
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# Handle sending remote undoing boosts/likes/pins
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case (FanOut.Types.undo_interaction, False): # noqa:F841
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interaction = instance.subject_post_interaction
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# Send an undo to the remote inbox
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try:
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if interaction.type == interaction.Types.pin:
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body = interaction.to_remove_ap()
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else:
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body = interaction.to_undo_ap()
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interaction.identity.signed_request(
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method="post",
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uri=(
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instance.identity.shared_inbox_uri
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or instance.identity.inbox_uri
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),
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body=canonicalise(body),
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)
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except httpx.RequestError:
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return
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# Handle sending identity edited to remote
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case (FanOut.Types.identity_edited, False):
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identity = instance.subject_identity
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try:
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identity.signed_request(
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method="post",
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uri=(
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instance.identity.shared_inbox_uri
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or instance.identity.inbox_uri
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),
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body=canonicalise(instance.subject_identity.to_update_ap()),
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)
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except httpx.RequestError:
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return
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# Handle sending identity deleted to remote
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case (FanOut.Types.identity_deleted, False):
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identity = instance.subject_identity
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try:
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identity.signed_request(
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method="post",
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uri=(
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instance.identity.shared_inbox_uri
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or instance.identity.inbox_uri
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),
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body=canonicalise(instance.subject_identity.to_delete_ap()),
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)
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except httpx.RequestError:
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return
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# Handle sending identity moved to remote
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case (FanOut.Types.identity_moved, False):
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raise NotImplementedError()
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# Sending identity edited/deleted to local is a no-op
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case (FanOut.Types.identity_edited, True):
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pass
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case (FanOut.Types.identity_deleted, True):
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pass
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# Created identities make a timeline event
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case (FanOut.Types.identity_created, True):
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TimelineEvent.add_identity_created(
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identity=instance.identity,
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new_identity=instance.subject_identity,
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)
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case _:
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raise ValueError(
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f"Cannot fan out with type {instance.type} local={instance.identity.local}"
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)
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return cls.sent
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class FanOut(StatorModel):
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"""
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An activity that needs to get to an inbox somewhere.
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"""
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class Types(models.TextChoices):
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post = "post"
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post_edited = "post_edited"
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post_deleted = "post_deleted"
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interaction = "interaction"
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undo_interaction = "undo_interaction"
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identity_edited = "identity_edited"
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identity_deleted = "identity_deleted"
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identity_created = "identity_created"
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identity_moved = "identity_moved"
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state = StateField(FanOutStates)
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# The user this event is targeted at
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# We always need this, but if there is a shared inbox URL on the user
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# we'll deliver to that and won't have fanouts for anyone else with the
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# same one.
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identity = models.ForeignKey(
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"users.Identity",
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on_delete=models.CASCADE,
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related_name="fan_outs",
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)
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# What type of activity it is
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type = models.CharField(max_length=100, choices=Types.choices)
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# Links to the appropriate objects
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subject_post = models.ForeignKey(
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"activities.Post",
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on_delete=models.CASCADE,
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blank=True,
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null=True,
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related_name="fan_outs",
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)
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subject_post_interaction = models.ForeignKey(
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"activities.PostInteraction",
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on_delete=models.CASCADE,
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blank=True,
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null=True,
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related_name="fan_outs",
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)
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subject_identity = models.ForeignKey(
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"users.Identity",
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on_delete=models.CASCADE,
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blank=True,
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null=True,
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related_name="subject_fan_outs",
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)
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created = models.DateTimeField(auto_now_add=True)
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updated = models.DateTimeField(auto_now=True)
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