microblog.pub/app/boxes.py

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"""Actions related to the AP inbox/outbox."""
import uuid
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from collections import defaultdict
from dataclasses import dataclass
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from datetime import timedelta
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from urllib.parse import urlparse
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import fastapi
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import httpx
from loguru import logger
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from sqlalchemy import delete
from sqlalchemy import func
from sqlalchemy import select
from sqlalchemy import update
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from sqlalchemy.exc import IntegrityError
from sqlalchemy.orm import joinedload
from app import activitypub as ap
from app import config
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from app import ldsig
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from app import models
from app.actor import LOCAL_ACTOR
from app.actor import Actor
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from app.actor import RemoteActor
from app.actor import fetch_actor
from app.actor import save_actor
from app.ap_object import RemoteObject
from app.config import BASE_URL
from app.config import ID
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from app.database import AsyncSession
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from app.outgoing_activities import new_outgoing_activity
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from app.source import markdownify
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from app.uploads import upload_to_attachment
from app.utils import opengraph
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from app.utils import webmentions
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from app.utils.datetime import as_utc
from app.utils.datetime import now
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from app.utils.datetime import parse_isoformat
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AnyboxObject = models.InboxObject | models.OutboxObject
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def allocate_outbox_id() -> str:
return uuid.uuid4().hex
def outbox_object_id(outbox_id) -> str:
return f"{BASE_URL}/o/{outbox_id}"
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async def save_outbox_object(
db_session: AsyncSession,
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public_id: str,
raw_object: ap.RawObject,
relates_to_inbox_object_id: int | None = None,
relates_to_outbox_object_id: int | None = None,
relates_to_actor_id: int | None = None,
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source: str | None = None,
) -> models.OutboxObject:
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ra = await RemoteObject.from_raw_object(raw_object)
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outbox_object = models.OutboxObject(
public_id=public_id,
ap_type=ra.ap_type,
ap_id=ra.ap_id,
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ap_context=ra.ap_context,
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ap_object=ra.ap_object,
visibility=ra.visibility,
og_meta=await opengraph.og_meta_from_note(ra.ap_object),
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relates_to_inbox_object_id=relates_to_inbox_object_id,
relates_to_outbox_object_id=relates_to_outbox_object_id,
relates_to_actor_id=relates_to_actor_id,
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activity_object_ap_id=ra.activity_object_ap_id,
is_hidden_from_homepage=True if ra.in_reply_to else False,
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source=source,
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)
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db_session.add(outbox_object)
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await db_session.flush()
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await db_session.refresh(outbox_object)
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return outbox_object
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async def send_delete(db_session: AsyncSession, ap_object_id: str) -> None:
outbox_object_to_delete = await get_outbox_object_by_ap_id(db_session, ap_object_id)
if not outbox_object_to_delete:
raise ValueError(f"{ap_object_id} not found in the outbox")
delete_id = allocate_outbox_id()
delete = {
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"@context": ap.AS_EXTENDED_CTX,
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"id": outbox_object_id(delete_id),
"type": "Delete",
"actor": ID,
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"object": {
"type": "Tombstone",
"id": ap_object_id,
},
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}
outbox_object = await save_outbox_object(
db_session,
delete_id,
delete,
relates_to_outbox_object_id=outbox_object_to_delete.id,
)
if not outbox_object.id:
raise ValueError("Should never happen")
outbox_object_to_delete.is_deleted = True
await db_session.commit()
# Compute the original recipients
recipients = await _compute_recipients(
db_session, outbox_object_to_delete.ap_object
)
for rcp in recipients:
await new_outgoing_activity(db_session, rcp, outbox_object.id)
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await db_session.commit()
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async def send_like(db_session: AsyncSession, ap_object_id: str) -> None:
inbox_object = await get_inbox_object_by_ap_id(db_session, ap_object_id)
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if not inbox_object:
raise ValueError(f"{ap_object_id} not found in the inbox")
like_id = allocate_outbox_id()
like = {
"@context": ap.AS_CTX,
"id": outbox_object_id(like_id),
"type": "Like",
"actor": ID,
"object": ap_object_id,
}
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outbox_object = await save_outbox_object(
db_session, like_id, like, relates_to_inbox_object_id=inbox_object.id
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)
if not outbox_object.id:
raise ValueError("Should never happen")
inbox_object.liked_via_outbox_object_ap_id = outbox_object.ap_id
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await new_outgoing_activity(
db_session, inbox_object.actor.inbox_url, outbox_object.id
)
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await db_session.commit()
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async def send_announce(db_session: AsyncSession, ap_object_id: str) -> None:
inbox_object = await get_inbox_object_by_ap_id(db_session, ap_object_id)
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if not inbox_object:
raise ValueError(f"{ap_object_id} not found in the inbox")
announce_id = allocate_outbox_id()
announce = {
"@context": ap.AS_CTX,
"id": outbox_object_id(announce_id),
"type": "Announce",
"actor": ID,
"object": ap_object_id,
"to": [ap.AS_PUBLIC],
"cc": [
f"{BASE_URL}/followers",
inbox_object.ap_actor_id,
],
}
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outbox_object = await save_outbox_object(
db_session, announce_id, announce, relates_to_inbox_object_id=inbox_object.id
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)
if not outbox_object.id:
raise ValueError("Should never happen")
inbox_object.announced_via_outbox_object_ap_id = outbox_object.ap_id
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await db_session.commit()
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recipients = await _compute_recipients(db_session, announce)
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for rcp in recipients:
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await new_outgoing_activity(db_session, rcp, outbox_object.id)
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async def send_follow(db_session: AsyncSession, ap_actor_id: str) -> None:
actor = await fetch_actor(db_session, ap_actor_id)
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follow_id = allocate_outbox_id()
follow = {
"@context": ap.AS_CTX,
"id": outbox_object_id(follow_id),
"type": "Follow",
"actor": ID,
"object": ap_actor_id,
}
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outbox_object = await save_outbox_object(
db_session, follow_id, follow, relates_to_actor_id=actor.id
)
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if not outbox_object.id:
raise ValueError("Should never happen")
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await new_outgoing_activity(db_session, actor.inbox_url, outbox_object.id)
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await db_session.commit()
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async def send_undo(db_session: AsyncSession, ap_object_id: str) -> None:
outbox_object_to_undo = await get_outbox_object_by_ap_id(db_session, ap_object_id)
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if not outbox_object_to_undo:
raise ValueError(f"{ap_object_id} not found in the outbox")
if outbox_object_to_undo.ap_type not in ["Follow", "Like", "Announce"]:
raise ValueError(
f"Cannot build Undo for {outbox_object_to_undo.ap_type} activity"
)
undo_id = allocate_outbox_id()
undo = {
"@context": ap.AS_CTX,
"id": outbox_object_id(undo_id),
"type": "Undo",
"actor": ID,
"object": ap.remove_context(outbox_object_to_undo.ap_object),
}
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outbox_object = await save_outbox_object(
db_session,
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undo_id,
undo,
relates_to_outbox_object_id=outbox_object_to_undo.id,
)
if not outbox_object.id:
raise ValueError("Should never happen")
outbox_object_to_undo.undone_by_outbox_object_id = outbox_object.id
if outbox_object_to_undo.ap_type == "Follow":
if not outbox_object_to_undo.activity_object_ap_id:
raise ValueError("Should never happen")
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followed_actor = await fetch_actor(
db_session, outbox_object_to_undo.activity_object_ap_id
)
await new_outgoing_activity(
db_session,
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followed_actor.inbox_url,
outbox_object.id,
)
# Also remove the follow from the following collection
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await db_session.execute(
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delete(models.Following).where(
models.Following.ap_actor_id == followed_actor.ap_id
)
)
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elif outbox_object_to_undo.ap_type == "Like":
liked_object_ap_id = outbox_object_to_undo.activity_object_ap_id
if not liked_object_ap_id:
raise ValueError("Should never happen")
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liked_object = await get_inbox_object_by_ap_id(db_session, liked_object_ap_id)
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if not liked_object:
raise ValueError(f"Cannot find liked object {liked_object_ap_id}")
liked_object.liked_via_outbox_object_ap_id = None
# Send the Undo to the liked object's actor
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await new_outgoing_activity(
db_session,
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liked_object.actor.inbox_url, # type: ignore
outbox_object.id,
)
elif outbox_object_to_undo.ap_type == "Announce":
announced_object_ap_id = outbox_object_to_undo.activity_object_ap_id
if not announced_object_ap_id:
raise ValueError("Should never happen")
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announced_object = await get_inbox_object_by_ap_id(
db_session, announced_object_ap_id
)
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if not announced_object:
raise ValueError(f"Cannot find announced object {announced_object_ap_id}")
announced_object.announced_via_outbox_object_ap_id = None
# Send the Undo to the original recipients
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recipients = await _compute_recipients(db_session, outbox_object.ap_object)
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for rcp in recipients:
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await new_outgoing_activity(db_session, rcp, outbox_object.id)
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else:
raise ValueError("Should never happen")
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await db_session.commit()
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async def send_create(
db_session: AsyncSession,
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source: str,
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uploads: list[tuple[models.Upload, str, str | None]],
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in_reply_to: str | None,
visibility: ap.VisibilityEnum,
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content_warning: str | None = None,
is_sensitive: bool = False,
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) -> str:
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note_id = allocate_outbox_id()
published = now().replace(microsecond=0).isoformat().replace("+00:00", "Z")
context = f"{ID}/contexts/" + uuid.uuid4().hex
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content, tags, mentioned_actors = await markdownify(db_session, source)
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attachments = []
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if in_reply_to:
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in_reply_to_object = await get_anybox_object_by_ap_id(db_session, in_reply_to)
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if not in_reply_to_object:
raise ValueError(f"Invalid in reply to {in_reply_to=}")
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if not in_reply_to_object.ap_context:
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raise ValueError("Object has no context")
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context = in_reply_to_object.ap_context
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if in_reply_to_object.is_from_outbox:
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await db_session.execute(
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update(models.OutboxObject)
.where(
models.OutboxObject.ap_id == in_reply_to,
)
.values(replies_count=models.OutboxObject.replies_count + 1)
)
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for (upload, filename, alt_text) in uploads:
attachments.append(upload_to_attachment(upload, filename, alt_text))
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to = []
cc = []
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mentioned_actor_ap_ids = [actor.ap_id for actor in mentioned_actors]
if visibility == ap.VisibilityEnum.PUBLIC:
to = [ap.AS_PUBLIC]
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cc = [f"{BASE_URL}/followers"] + mentioned_actor_ap_ids
elif visibility == ap.VisibilityEnum.UNLISTED:
to = [f"{BASE_URL}/followers"]
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cc = [ap.AS_PUBLIC] + mentioned_actor_ap_ids
elif visibility == ap.VisibilityEnum.FOLLOWERS_ONLY:
to = [f"{BASE_URL}/followers"]
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cc = mentioned_actor_ap_ids
elif visibility == ap.VisibilityEnum.DIRECT:
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to = mentioned_actor_ap_ids
cc = []
else:
raise ValueError(f"Unhandled visibility {visibility}")
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note = {
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"@context": ap.AS_EXTENDED_CTX,
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"type": "Note",
"id": outbox_object_id(note_id),
"attributedTo": ID,
"content": content,
"to": to,
"cc": cc,
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"published": published,
"context": context,
"conversation": context,
"url": outbox_object_id(note_id),
"tag": tags,
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"summary": content_warning,
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"inReplyTo": in_reply_to,
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"sensitive": is_sensitive,
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"attachment": attachments,
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}
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outbox_object = await save_outbox_object(db_session, note_id, note, source=source)
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if not outbox_object.id:
raise ValueError("Should never happen")
for tag in tags:
if tag["type"] == "Hashtag":
tagged_object = models.TaggedOutboxObject(
tag=tag["name"][1:],
outbox_object_id=outbox_object.id,
)
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db_session.add(tagged_object)
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for (upload, filename, alt) in uploads:
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outbox_object_attachment = models.OutboxObjectAttachment(
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filename=filename,
alt=alt,
outbox_object_id=outbox_object.id,
upload_id=upload.id,
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)
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db_session.add(outbox_object_attachment)
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recipients = await _compute_recipients(db_session, note)
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for rcp in recipients:
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await new_outgoing_activity(db_session, rcp, outbox_object.id)
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# If the note is public, check if we need to send any webmentions
if visibility == ap.VisibilityEnum.PUBLIC:
possible_targets = opengraph._urls_from_note(note)
logger.info(f"webmentions possible targert {possible_targets}")
for target in possible_targets:
webmention_endpoint = await webmentions.discover_webmention_endpoint(target)
logger.info(f"{target=} {webmention_endpoint=}")
if webmention_endpoint:
await new_outgoing_activity(
db_session,
webmention_endpoint,
outbox_object_id=outbox_object.id,
webmention_target=target,
)
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await db_session.commit()
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return note_id
async def send_update(
db_session: AsyncSession,
ap_id: str,
source: str,
) -> str:
outbox_object = await get_outbox_object_by_ap_id(db_session, ap_id)
if not outbox_object:
raise ValueError(f"{ap_id} not found")
revisions = outbox_object.revisions or []
revisions.append(
{
"ap_object": outbox_object.ap_object,
"source": outbox_object.source,
"updated": (
outbox_object.ap_object.get("updated")
or outbox_object.ap_object.get("published")
),
}
)
updated = now().replace(microsecond=0).isoformat().replace("+00:00", "Z")
content, tags, mentioned_actors = await markdownify(db_session, source)
note = {
"@context": ap.AS_EXTENDED_CTX,
"type": outbox_object.ap_type,
"id": outbox_object.ap_id,
"attributedTo": ID,
"content": content,
"to": outbox_object.ap_object["to"],
"cc": outbox_object.ap_object["cc"],
"published": outbox_object.ap_object["published"],
"context": outbox_object.ap_context,
"conversation": outbox_object.ap_context,
"url": outbox_object.url,
"tag": tags,
"summary": outbox_object.summary,
"inReplyTo": outbox_object.in_reply_to,
"sensitive": outbox_object.sensitive,
"attachment": outbox_object.ap_object["attachment"],
"updated": updated,
}
outbox_object.ap_object = note
outbox_object.source = source
outbox_object.revisions = revisions
recipients = await _compute_recipients(db_session, note)
for rcp in recipients:
await new_outgoing_activity(db_session, rcp, outbox_object.id)
# If the note is public, check if we need to send any webmentions
if outbox_object.visibility == ap.VisibilityEnum.PUBLIC:
possible_targets = opengraph._urls_from_note(note)
logger.info(f"webmentions possible targert {possible_targets}")
for target in possible_targets:
webmention_endpoint = await webmentions.discover_webmention_endpoint(target)
logger.info(f"{target=} {webmention_endpoint=}")
if webmention_endpoint:
await new_outgoing_activity(
db_session,
webmention_endpoint,
outbox_object_id=outbox_object.id,
webmention_target=target,
)
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await db_session.commit()
return outbox_object.public_id # type: ignore
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async def _compute_recipients(
db_session: AsyncSession, ap_object: ap.RawObject
) -> set[str]:
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_recipients = []
for field in ["to", "cc", "bto", "bcc"]:
if field in ap_object:
_recipients.extend(ap.as_list(ap_object[field]))
recipients = set()
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logger.info(f"{_recipients}")
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for r in _recipients:
if r in [ap.AS_PUBLIC, ID]:
continue
# If we got a local collection, assume it's a collection of actors
if r.startswith(BASE_URL):
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for actor in await fetch_actor_collection(db_session, r):
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recipients.add(actor.shared_inbox_url or actor.inbox_url)
continue
# Is it a known actor?
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known_actor = (
await db_session.execute(
select(models.Actor).where(models.Actor.ap_id == r)
)
).scalar_one_or_none() # type: ignore
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if known_actor:
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recipients.add(known_actor.shared_inbox_url or known_actor.inbox_url)
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continue
# Fetch the object
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raw_object = await ap.fetch(r)
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if raw_object.get("type") in ap.ACTOR_TYPES:
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saved_actor = await save_actor(db_session, raw_object)
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recipients.add(saved_actor.shared_inbox_url or saved_actor.inbox_url)
else:
# Assume it's a collection of actors
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for raw_actor in await ap.parse_collection(payload=raw_object):
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actor = RemoteActor(raw_actor)
recipients.add(actor.shared_inbox_url or actor.inbox_url)
return recipients
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async def _get_following(db_session: AsyncSession) -> list[models.Follower]:
return (
(
await db_session.scalars(
select(models.Following).options(joinedload(models.Following.actor))
)
)
.unique()
.all()
)
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async def _get_followers(db_session: AsyncSession) -> list[models.Follower]:
return (
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(
await db_session.scalars(
select(models.Follower).options(joinedload(models.Follower.actor))
)
)
.unique()
.all()
)
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async def _get_followers_recipients(db_session: AsyncSession) -> set[str]:
"""Returns all the recipients from the local follower collection."""
followers = await _get_followers(db_session)
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return {
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follower.actor.shared_inbox_url or follower.actor.inbox_url # type: ignore
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for follower in followers
}
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async def get_inbox_object_by_ap_id(
db_session: AsyncSession, ap_id: str
) -> models.InboxObject | None:
return (
await db_session.execute(
select(models.InboxObject)
.where(models.InboxObject.ap_id == ap_id)
.options(
joinedload(models.InboxObject.actor),
joinedload(models.InboxObject.relates_to_inbox_object),
joinedload(models.InboxObject.relates_to_outbox_object),
)
)
).scalar_one_or_none() # type: ignore
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async def get_outbox_object_by_ap_id(
db_session: AsyncSession, ap_id: str
) -> models.OutboxObject | None:
return (
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(
await db_session.execute(
select(models.OutboxObject)
.where(models.OutboxObject.ap_id == ap_id)
.options(
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joinedload(models.OutboxObject.outbox_object_attachments).options(
joinedload(models.OutboxObjectAttachment.upload)
),
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joinedload(models.OutboxObject.relates_to_inbox_object).options(
joinedload(models.InboxObject.actor),
),
joinedload(models.OutboxObject.relates_to_outbox_object).options(
joinedload(
models.OutboxObject.outbox_object_attachments
).options(joinedload(models.OutboxObjectAttachment.upload)),
),
)
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)
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)
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.unique()
.scalar_one_or_none()
) # type: ignore
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async def get_anybox_object_by_ap_id(
db_session: AsyncSession, ap_id: str
) -> AnyboxObject | None:
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if ap_id.startswith(BASE_URL):
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return await get_outbox_object_by_ap_id(db_session, ap_id)
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else:
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return await get_inbox_object_by_ap_id(db_session, ap_id)
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async def _handle_delete_activity(
db_session: AsyncSession,
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from_actor: models.Actor,
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delete_activity: models.InboxObject,
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ap_object_to_delete: models.InboxObject,
) -> None:
if from_actor.ap_id != ap_object_to_delete.actor.ap_id:
logger.warning(
"Actor mismatch between the activity and the object: "
f"{from_actor.ap_id}/{ap_object_to_delete.actor.ap_id}"
)
return
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# If it's a local replies, it was forwarded, so we also need to forward
# the Delete activity if possible
if (
delete_activity.has_ld_signature
and ap_object_to_delete.in_reply_to
and ap_object_to_delete.in_reply_to.startswith(BASE_URL)
):
logger.info("Forwarding Delete activity as it's a local reply")
recipients = await _get_followers_recipients(db_session)
for rcp in recipients:
await new_outgoing_activity(
db_session,
rcp,
outbox_object_id=None,
inbox_object_id=delete_activity.id,
)
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logger.info(f"Deleting {ap_object_to_delete.ap_type}/{ap_object_to_delete.ap_id}")
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ap_object_to_delete.is_deleted = True
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# Decrement the replies counter if needed
if ap_object_to_delete.in_reply_to:
replied_object = await get_anybox_object_by_ap_id(
db_session,
ap_object_to_delete.in_reply_to,
)
if replied_object:
if replied_object.is_from_outbox:
await db_session.execute(
update(models.OutboxObject)
.where(
models.OutboxObject.id == replied_object.id,
)
.values(replies_count=models.OutboxObject.replies_count - 1)
)
else:
await db_session.execute(
update(models.InboxObject)
.where(
models.InboxObject.id == replied_object.id,
)
.values(replies_count=models.InboxObject.replies_count - 1)
)
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async def _handle_follow_follow_activity(
db_session: AsyncSession,
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from_actor: models.Actor,
inbox_object: models.InboxObject,
) -> None:
follower = models.Follower(
actor_id=from_actor.id,
inbox_object_id=inbox_object.id,
ap_actor_id=from_actor.ap_id,
)
try:
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db_session.add(follower)
await db_session.flush()
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except IntegrityError:
pass # TODO update the existing followe
# Reply with an Accept
reply_id = allocate_outbox_id()
reply = {
"@context": ap.AS_CTX,
"id": outbox_object_id(reply_id),
"type": "Accept",
"actor": ID,
"object": inbox_object.ap_id,
}
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outbox_activity = await save_outbox_object(db_session, reply_id, reply)
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if not outbox_activity.id:
raise ValueError("Should never happen")
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await new_outgoing_activity(db_session, from_actor.inbox_url, outbox_activity.id)
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notif = models.Notification(
notification_type=models.NotificationType.NEW_FOLLOWER,
actor_id=from_actor.id,
)
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db_session.add(notif)
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async def _handle_undo_activity(
db_session: AsyncSession,
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from_actor: models.Actor,
undo_activity: models.InboxObject,
ap_activity_to_undo: models.InboxObject,
) -> None:
if from_actor.ap_id != ap_activity_to_undo.actor.ap_id:
logger.warning(
"Actor mismatch between the activity and the object: "
f"{from_actor.ap_id}/{ap_activity_to_undo.actor.ap_id}"
)
return
ap_activity_to_undo.undone_by_inbox_object_id = undo_activity.id
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ap_activity_to_undo.is_deleted = True
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if ap_activity_to_undo.ap_type == "Follow":
logger.info(f"Undo follow from {from_actor.ap_id}")
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await db_session.execute(
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delete(models.Follower).where(
models.Follower.inbox_object_id == ap_activity_to_undo.id
)
)
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notif = models.Notification(
notification_type=models.NotificationType.UNFOLLOW,
actor_id=from_actor.id,
)
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db_session.add(notif)
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elif ap_activity_to_undo.ap_type == "Like":
if not ap_activity_to_undo.activity_object_ap_id:
raise ValueError("Like without object")
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liked_obj = await get_outbox_object_by_ap_id(
db_session,
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ap_activity_to_undo.activity_object_ap_id,
)
if not liked_obj:
logger.warning(
"Cannot find liked object: "
f"{ap_activity_to_undo.activity_object_ap_id}"
)
return
liked_obj.likes_count = models.OutboxObject.likes_count - 1
notif = models.Notification(
notification_type=models.NotificationType.UNDO_LIKE,
actor_id=from_actor.id,
outbox_object_id=liked_obj.id,
inbox_object_id=ap_activity_to_undo.id,
)
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db_session.add(notif)
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elif ap_activity_to_undo.ap_type == "Announce":
if not ap_activity_to_undo.activity_object_ap_id:
raise ValueError("Announce witout object")
announced_obj_ap_id = ap_activity_to_undo.activity_object_ap_id
logger.info(
f"Undo for announce {ap_activity_to_undo.ap_id}/{announced_obj_ap_id}"
)
if announced_obj_ap_id.startswith(BASE_URL):
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announced_obj_from_outbox = await get_outbox_object_by_ap_id(
db_session, announced_obj_ap_id
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)
if announced_obj_from_outbox:
logger.info("Found in the oubox")
announced_obj_from_outbox.announces_count = (
models.OutboxObject.announces_count - 1
)
notif = models.Notification(
notification_type=models.NotificationType.UNDO_ANNOUNCE,
actor_id=from_actor.id,
outbox_object_id=announced_obj_from_outbox.id,
inbox_object_id=ap_activity_to_undo.id,
)
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db_session.add(notif)
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else:
logger.warning(f"Don't know how to undo {ap_activity_to_undo.ap_type} activity")
# commit will be perfomed in save_to_inbox
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async def _handle_update_activity(
db_session: AsyncSession,
from_actor: models.Actor,
update_activity: models.InboxObject,
) -> None:
logger.info("Processing Update activity")
wrapped_object = await ap.get_object(update_activity.ap_object)
if wrapped_object["type"] in ap.ACTOR_TYPES:
logger.info("Updating actor")
updated_actor = RemoteActor(wrapped_object)
if (
from_actor.ap_id != updated_actor.ap_id
or from_actor.ap_type != updated_actor.ap_type
or from_actor.handle != updated_actor.handle
):
raise ValueError(
f"Invalid Update activity {from_actor.ap_actor}/"
f"{updated_actor.ap_actor}"
)
# Update the actor
from_actor.ap_actor = updated_actor.ap_actor
else:
# TODO(ts): support updating objects
logger.info(f'Cannot update {wrapped_object["type"]}')
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async def _handle_create_activity(
db_session: AsyncSession,
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from_actor: models.Actor,
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create_activity: models.InboxObject,
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) -> None:
logger.info("Processing Create activity")
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wrapped_object = ap.unwrap_activity(create_activity.ap_object)
if create_activity.actor.ap_id != ap.get_actor_id(wrapped_object):
raise ValueError("Object actor does not match activity")
ro = RemoteObject(wrapped_object, actor=from_actor)
await _process_note_object(db_session, create_activity, from_actor, ro)
async def _handle_read_activity(
db_session: AsyncSession,
from_actor: models.Actor,
read_activity: models.InboxObject,
) -> None:
logger.info("Processing Read activity")
# Honk uses Read activity to propagate replies, fetch the read object
# from the remote server
wrapped_object = await ap.fetch(ap.get_id(read_activity.ap_object["object"]))
wrapped_object_actor = await fetch_actor(
db_session, ap.get_actor_id(wrapped_object)
)
ro = RemoteObject(wrapped_object, actor=wrapped_object_actor)
# Then process it likes it's coming from a forwarded activity
await _process_note_object(db_session, read_activity, wrapped_object_actor, ro)
async def _process_note_object(
db_session: AsyncSession,
parent_activity: models.InboxObject,
from_actor: models.Actor,
ro: RemoteObject,
) -> None:
if parent_activity.ap_type not in ["Create", "Read"]:
raise ValueError(f"Unexpected parent activity {parent_activity.ap_id}")
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ap_published_at = now()
if "published" in ro.ap_object:
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ap_published_at = parse_isoformat(ro.ap_object["published"])
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following = await _get_following(db_session)
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is_from_following = ro.actor.ap_id in {f.ap_actor_id for f in following}
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is_reply = bool(ro.in_reply_to)
is_local_reply = ro.in_reply_to and ro.in_reply_to.startswith(BASE_URL)
is_mention = False
tags = ro.ap_object.get("tag", [])
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for tag in ap.as_list(tags):
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if tag.get("name") == LOCAL_ACTOR.handle or tag.get("href") == LOCAL_ACTOR.url:
is_mention = True
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inbox_object = models.InboxObject(
server=urlparse(ro.ap_id).netloc,
actor_id=from_actor.id,
ap_actor_id=from_actor.ap_id,
ap_type=ro.ap_type,
ap_id=ro.ap_id,
ap_context=ro.ap_context,
ap_published_at=ap_published_at,
ap_object=ro.ap_object,
visibility=ro.visibility,
relates_to_inbox_object_id=parent_activity.id,
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relates_to_outbox_object_id=None,
activity_object_ap_id=ro.activity_object_ap_id,
# Hide replies from the stream
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is_hidden_from_stream=not (
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(not is_reply and is_from_following) or is_mention or is_local_reply
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),
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)
db_session.add(inbox_object)
await db_session.flush()
await db_session.refresh(inbox_object)
parent_activity.relates_to_inbox_object_id = inbox_object.id
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if inbox_object.in_reply_to:
replied_object = await get_anybox_object_by_ap_id(
db_session, inbox_object.in_reply_to
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)
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if replied_object:
if replied_object.is_from_outbox:
await db_session.execute(
update(models.OutboxObject)
.where(
models.OutboxObject.id == replied_object.id,
)
.values(replies_count=models.OutboxObject.replies_count + 1)
)
else:
await db_session.execute(
update(models.InboxObject)
.where(
models.InboxObject.id == replied_object.id,
)
.values(replies_count=models.InboxObject.replies_count + 1)
)
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# This object is a reply of a local object, we may need to forward it
# to our followers (we can only forward JSON-LD signed activities)
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if (
parent_activity.ap_type == "Create"
and replied_object
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and replied_object.is_from_outbox
and parent_activity.has_ld_signature
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):
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logger.info("Forwarding Create activity as it's a local reply")
recipients = await _get_followers_recipients(db_session)
for rcp in recipients:
await new_outgoing_activity(
db_session,
rcp,
outbox_object_id=None,
inbox_object_id=parent_activity.id,
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)
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if is_mention:
notif = models.Notification(
notification_type=models.NotificationType.MENTION,
actor_id=from_actor.id,
inbox_object_id=inbox_object.id,
)
db_session.add(notif)
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async def _process_transient_object(
db_session: AsyncSession,
raw_object: ap.RawObject,
from_actor: models.Actor,
) -> None:
ap_type = raw_object["type"]
if ap_type in ["Add", "Remove"]:
logger.info(f"Dropping unsupported {ap_type} object")
else:
logger.warning(f"Received unknown {ap_type} object")
return None
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async def save_to_inbox(
db_session: AsyncSession,
raw_object: ap.RawObject,
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sent_by_ap_actor_id: str,
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) -> None:
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try:
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actor = await fetch_actor(db_session, ap.get_id(raw_object["actor"]))
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except httpx.HTTPStatusError:
logger.exception("Failed to fetch actor")
return
if "id" not in raw_object:
await _process_transient_object(db_session, raw_object, actor)
return None
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raw_object_id = ap.get_id(raw_object)
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# Ensure forwarded activities have a valid LD sig
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if sent_by_ap_actor_id != actor.ap_id:
logger.info(
f"Processing a forwarded activity {sent_by_ap_actor_id=}/{actor.ap_id}"
)
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if not (await ldsig.verify_signature(db_session, raw_object)):
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logger.warning(
f"Failed to verify LD sig, fetching remote object {raw_object_id}"
)
# Try to fetch the remote object since we failed to verify the LD sig
try:
raw_object = await ap.fetch(raw_object_id)
except Exception:
raise fastapi.HTTPException(status_code=401, detail="Invalid LD sig")
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if (
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await db_session.scalar(
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select(func.count(models.InboxObject.id)).where(
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models.InboxObject.ap_id == raw_object_id
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)
)
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> 0
):
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logger.info(
f'Received duplicate {raw_object["type"]} activity: {raw_object_id}'
)
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return
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ap_published_at = now()
if "published" in raw_object:
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ap_published_at = parse_isoformat(raw_object["published"])
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activity_ro = RemoteObject(raw_object, actor=actor)
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relates_to_inbox_object: models.InboxObject | None = None
relates_to_outbox_object: models.OutboxObject | None = None
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if activity_ro.activity_object_ap_id:
if activity_ro.activity_object_ap_id.startswith(BASE_URL):
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relates_to_outbox_object = await get_outbox_object_by_ap_id(
db_session,
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activity_ro.activity_object_ap_id,
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)
else:
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relates_to_inbox_object = await get_inbox_object_by_ap_id(
db_session,
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activity_ro.activity_object_ap_id,
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)
inbox_object = models.InboxObject(
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server=urlparse(activity_ro.ap_id).netloc,
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actor_id=actor.id,
ap_actor_id=actor.ap_id,
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ap_type=activity_ro.ap_type,
ap_id=activity_ro.ap_id,
ap_context=activity_ro.ap_context,
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ap_published_at=ap_published_at,
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ap_object=activity_ro.ap_object,
visibility=activity_ro.visibility,
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relates_to_inbox_object_id=relates_to_inbox_object.id
if relates_to_inbox_object
else None,
relates_to_outbox_object_id=relates_to_outbox_object.id
if relates_to_outbox_object
else None,
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activity_object_ap_id=activity_ro.activity_object_ap_id,
is_hidden_from_stream=True,
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)
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db_session.add(inbox_object)
await db_session.flush()
await db_session.refresh(inbox_object)
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if activity_ro.ap_type == "Create":
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await _handle_create_activity(db_session, actor, inbox_object)
elif activity_ro.ap_type == "Read":
await _handle_read_activity(db_session, actor, inbox_object)
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elif activity_ro.ap_type == "Update":
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await _handle_update_activity(db_session, actor, inbox_object)
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elif activity_ro.ap_type == "Delete":
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if relates_to_inbox_object:
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await _handle_delete_activity(
db_session,
actor,
inbox_object,
relates_to_inbox_object,
)
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else:
# TODO(ts): handle delete actor
logger.info(
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"Received a Delete for an unknown object: "
f"{activity_ro.activity_object_ap_id}"
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)
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elif activity_ro.ap_type == "Follow":
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await _handle_follow_follow_activity(db_session, actor, inbox_object)
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elif activity_ro.ap_type == "Undo":
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if relates_to_inbox_object:
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await _handle_undo_activity(
db_session, actor, inbox_object, relates_to_inbox_object
)
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else:
logger.info("Received Undo for an unknown activity")
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elif activity_ro.ap_type in ["Accept", "Reject"]:
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if not relates_to_outbox_object:
logger.info(
f"Received {raw_object['type']} for an unknown activity: "
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f"{activity_ro.activity_object_ap_id}"
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)
else:
if relates_to_outbox_object.ap_type == "Follow":
following = models.Following(
actor_id=actor.id,
outbox_object_id=relates_to_outbox_object.id,
ap_actor_id=actor.ap_id,
)
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db_session.add(following)
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else:
logger.info(
"Received an Accept for an unsupported activity: "
f"{relates_to_outbox_object.ap_type}"
)
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elif activity_ro.ap_type == "EmojiReact":
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if not relates_to_outbox_object:
logger.info(
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"Received a reaction for an unknown activity: "
f"{activity_ro.activity_object_ap_id}"
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)
else:
# TODO(ts): support reactions
pass
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elif activity_ro.ap_type == "Like":
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if not relates_to_outbox_object:
logger.info(
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"Received a like for an unknown activity: "
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f"{activity_ro.activity_object_ap_id}, deleting the activity"
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)
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await db_session.delete(inbox_object)
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else:
relates_to_outbox_object.likes_count = models.OutboxObject.likes_count + 1
notif = models.Notification(
notification_type=models.NotificationType.LIKE,
actor_id=actor.id,
outbox_object_id=relates_to_outbox_object.id,
inbox_object_id=inbox_object.id,
)
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db_session.add(notif)
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elif activity_ro.ap_type == "Announce":
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if relates_to_outbox_object:
# This is an announce for a local object
relates_to_outbox_object.announces_count = (
models.OutboxObject.announces_count + 1
)
notif = models.Notification(
notification_type=models.NotificationType.ANNOUNCE,
actor_id=actor.id,
outbox_object_id=relates_to_outbox_object.id,
inbox_object_id=inbox_object.id,
)
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db_session.add(notif)
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else:
# This is announce for a maybe unknown object
if relates_to_inbox_object:
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# We already know about this object, show the announce in the
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# stream if it's not already there
if (
now()
- as_utc(relates_to_inbox_object.ap_published_at) # type: ignore
) > timedelta(hours=1):
inbox_object.is_hidden_from_stream = False
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else:
# Save it as an inbox object
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if not activity_ro.activity_object_ap_id:
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raise ValueError("Should never happen")
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announced_raw_object = await ap.fetch(activity_ro.activity_object_ap_id)
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announced_actor = await fetch_actor(
db_session, ap.get_actor_id(announced_raw_object)
)
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announced_object = RemoteObject(announced_raw_object, announced_actor)
announced_inbox_object = models.InboxObject(
server=urlparse(announced_object.ap_id).netloc,
actor_id=announced_actor.id,
ap_actor_id=announced_actor.ap_id,
ap_type=announced_object.ap_type,
ap_id=announced_object.ap_id,
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ap_context=announced_object.ap_context,
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ap_published_at=announced_object.ap_published_at,
ap_object=announced_object.ap_object,
visibility=announced_object.visibility,
is_hidden_from_stream=True,
)
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db_session.add(announced_inbox_object)
await db_session.flush()
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inbox_object.relates_to_inbox_object_id = announced_inbox_object.id
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inbox_object.is_hidden_from_stream = False
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elif activity_ro.ap_type in ["Like", "Announce"]:
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if not relates_to_outbox_object:
logger.info(
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f"Received {activity_ro.ap_type} for an unknown activity: "
f"{activity_ro.activity_object_ap_id}"
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)
else:
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if activity_ro.ap_type == "Like":
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relates_to_outbox_object.likes_count = (
models.OutboxObject.likes_count + 1
)
notif = models.Notification(
notification_type=models.NotificationType.LIKE,
actor_id=actor.id,
outbox_object_id=relates_to_outbox_object.id,
inbox_object_id=inbox_object.id,
)
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db_session.add(notif)
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elif activity_ro.ap_type == "Announce":
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relates_to_outbox_object.announces_count = (
models.OutboxObject.announces_count + 1
)
notif = models.Notification(
notification_type=models.NotificationType.ANNOUNCE,
actor_id=actor.id,
outbox_object_id=relates_to_outbox_object.id,
inbox_object_id=inbox_object.id,
)
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db_session.add(notif)
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else:
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raise ValueError("Should never happen")
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else:
logger.warning(f"Received an unknown {inbox_object.ap_type} object")
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await db_session.commit()
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async def public_outbox_objects_count(db_session: AsyncSession) -> int:
return await db_session.scalar(
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select(func.count(models.OutboxObject.id)).where(
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models.OutboxObject.visibility == ap.VisibilityEnum.PUBLIC,
models.OutboxObject.is_deleted.is_(False),
)
)
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async def fetch_actor_collection(db_session: AsyncSession, url: str) -> list[Actor]:
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if url.startswith(config.BASE_URL):
if url == config.BASE_URL + "/followers":
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followers = (
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(
await db_session.scalars(
select(models.Follower).options(
joinedload(models.Follower.actor)
)
)
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)
.unique()
.all()
)
return [follower.actor for follower in followers]
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else:
raise ValueError(f"internal collection for {url}) not supported")
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return [RemoteActor(actor) for actor in await ap.parse_collection(url)]
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@dataclass
class ReplyTreeNode:
ap_object: AnyboxObject
children: list["ReplyTreeNode"]
is_requested: bool = False
is_root: bool = False
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async def get_replies_tree(
db_session: AsyncSession,
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requested_object: AnyboxObject,
) -> ReplyTreeNode:
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# XXX: PeerTube video don't use context
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tree_nodes: list[AnyboxObject] = []
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if requested_object.ap_context is None:
tree_nodes = [requested_object]
else:
# TODO: handle visibility
tree_nodes.extend(
(
await db_session.scalars(
select(models.InboxObject)
.where(
models.InboxObject.ap_context == requested_object.ap_context,
models.InboxObject.ap_type.not_in(["Announce"]),
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models.InboxObject.is_deleted.is_(False),
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)
.options(joinedload(models.InboxObject.actor))
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)
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)
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.unique()
.all()
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)
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tree_nodes.extend(
(
await db_session.scalars(
select(models.OutboxObject)
.where(
models.OutboxObject.ap_context == requested_object.ap_context,
models.OutboxObject.is_deleted.is_(False),
)
.options(
joinedload(
models.OutboxObject.outbox_object_attachments
).options(joinedload(models.OutboxObjectAttachment.upload))
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)
)
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)
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.unique()
.all()
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)
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nodes_by_in_reply_to = defaultdict(list)
for node in tree_nodes:
nodes_by_in_reply_to[node.in_reply_to].append(node)
logger.info(nodes_by_in_reply_to)
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if len(nodes_by_in_reply_to.get(None, [])) > 1:
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raise ValueError(f"Invalid replies tree: {[n.ap_object for n in tree_nodes]}")
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def _get_reply_node_children(
node: ReplyTreeNode,
index: defaultdict[str | None, list[AnyboxObject]],
) -> list[ReplyTreeNode]:
children = []
for child in index.get(node.ap_object.ap_id, []): # type: ignore
child_node = ReplyTreeNode(
ap_object=child,
is_requested=child.ap_id == requested_object.ap_id, # type: ignore
children=[],
)
child_node.children = _get_reply_node_children(child_node, index)
children.append(child_node)
return sorted(
children,
key=lambda node: node.ap_object.ap_published_at, # type: ignore
)
if None in nodes_by_in_reply_to:
root_ap_object = nodes_by_in_reply_to[None][0]
else:
root_ap_object = sorted(
tree_nodes,
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key=lambda ap_obj: ap_obj.ap_published_at, # type: ignore
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)[0]
root_node = ReplyTreeNode(
ap_object=root_ap_object,
is_root=True,
is_requested=root_ap_object.ap_id == requested_object.ap_id,
children=[],
)
root_node.children = _get_reply_node_children(root_node, nodes_by_in_reply_to)
return root_node