Pleroma relay experiment for getting more replies

app.py

@@ -722,6 +722,7 @@ def inbox():
         data = remote_data
     activity = ap.parse_activity(data)
     logger.debug(f"inbox activity={g.request_id}/{activity}/{data}")
+
     post_to_inbox(activity)
 
     return Response(status=201)

blueprints/tasks.py

@@ -7,6 +7,7 @@ import flask
 import requests
 from flask import current_app as app
 from little_boxes import activitypub as ap
+from little_boxes.activitypub import _to_list
 from little_boxes.errors import ActivityGoneError
 from little_boxes.errors import ActivityNotFoundError
 from little_boxes.errors import NotAnActivityError
@@ -21,10 +22,13 @@ from core.activitypub import Box
 from core.activitypub import _actor_hash
 from core.activitypub import _add_answers_to_question
 from core.activitypub import post_to_outbox
+from core.activitypub import save_reply
 from core.activitypub import update_cached_actor
+from core.db import find_one_activity
 from core.db import update_one_activity
 from core.inbox import process_inbox
 from core.meta import MetaKey
+from core.meta import by_object_id
 from core.meta import by_remote_id
 from core.meta import flag
 from core.meta import upsert
@@ -310,9 +314,10 @@ def task_cache_actor() -> _Response:
         if not activity.has_type([ap.ActivityType.CREATE, ap.ActivityType.ANNOUNCE]):
             return ""
 
-        if activity.get_object()._data.get(
-            "attachment", []
-        ) or activity.get_object().has_type(ap.ActivityType.VIDEO):
+        if activity.has_type(ap.ActivityType.CREATE) and (
+            activity.get_object()._data.get("attachment", [])
+            or activity.get_object().has_type(ap.ActivityType.VIDEO)
+        ):
             Tasks.cache_attachments(iri)
 
     except (ActivityGoneError, ActivityNotFoundError):
@@ -478,6 +483,79 @@ def task_cleanup() -> _Response:
     return ""
 
 
+def _is_local_reply(activity: ap.BaseActivity) -> bool:
+    for dest in _to_list(activity.to or []):
+        if dest.startswith(config.BASE_URL):
+            return True
+
+    for dest in _to_list(activity.cc or []):
+        if dest.startswith(config.BASE_URL):
+            return True
+
+    return False
+
+
+@blueprint.route("/task/process_reply", methods=["POST"])
+def task_process_reply() -> _Response:
+    """Process `Announce`d posts from Pleroma relays in order to process replies of activities that are in the inbox."""
+    task = p.parse(flask.request)
+    app.logger.info(f"task={task!r}")
+    iri = task.payload
+    try:
+        activity = ap.fetch_remote_activity(iri)
+        app.logger.info(f"checking for reply activity={activity!r}")
+
+        # Some AP server always return Create when requesting an object
+        if activity.has_type(ap.ActivityType.CREATE):
+            activity = activity.get_object()
+
+        in_reply_to = activity.get_in_reply_to()
+        if not in_reply_to:
+            # If it's not reply, we can drop it
+            app.logger.info(f"activity={activity!r} is not a reply, dropping it")
+            return ""
+
+        # new_threads = []
+        root_reply = in_reply_to
+        reply = ap.fetch_remote_activity(root_reply)
+        if reply.has_type(ap.ActivityType.CREATE):
+            reply = reply.get_object()
+
+        while reply is not None:
+            in_reply_to = reply.get_in_reply_to()
+            if not in_reply_to:
+                break
+            root_reply = in_reply_to
+            reply = ap.fetch_remote_activity(root_reply)
+            if reply.has_type(ap.ActivityType.CREATE):
+                reply = reply.get_object()
+
+        app.logger.info(f"root_reply={reply!r} for activity={activity!r}")
+
+        # Ensure the "root reply" is present in the inbox/outbox
+        if not find_one_activity(by_object_id(root_reply)):
+            return ""
+
+        actor = activity.get_actor()
+
+        save_reply(
+            activity,
+            {
+                "meta.thread_root_parent": root_reply,
+                **flag(MetaKey.ACTOR, actor.to_dict(embed=True)),
+            },
+        )
+        # FIXME(tsileo): cache actor here, spawn a task to cache attachment if needed
+    except (ActivityGoneError, ActivityNotFoundError):
+        app.logger.exception(f"dropping activity {iri}, skip processing")
+        return ""
+    except Exception as err:
+        app.logger.exception(f"failed to process new activity {iri}")
+        raise TaskError() from err
+
+    return ""
+
+
 @blueprint.route("/task/process_new_activity", methods=["POST"])  # noqa:c901
 def task_process_new_activity() -> _Response:
     """Process an activity received in the inbox"""

core/activitypub.py

@@ -12,7 +12,6 @@ from urllib.parse import urljoin
 from urllib.parse import urlparse
 
 from bson.objectid import ObjectId
-from cachetools import LRUCache
 from flask import url_for
 from little_boxes import activitypub as ap
 from little_boxes import strtobool
@@ -43,7 +42,6 @@ _NewMeta = Dict[str, Any]
 
 SIG_AUTH = HTTPSigAuth(KEY)
 
-ACTORS_CACHE = LRUCache(maxsize=256)
 MY_PERSON = ap.Person(**ME)
 
 
@@ -157,6 +155,16 @@ def post_to_inbox(activity: ap.BaseActivity) -> None:
         )
         return
 
+    # If the message is coming from a Pleroma relay, we process it as a possible reply for a stream activity
+    if (
+        actor.has_type(ap.ActivityType.APPLICATION)
+        and actor.id.endswith("/relay")
+        and activity.has_type(ap.ActivityType.ANNOUNCE)
+        and not DB.replies.find_one({"remote_id": activity.id})
+    ):
+        Tasks.process_reply(activity.get_object_id())
+        return
+
     if DB.activities.find_one({"box": Box.INBOX.value, "remote_id": activity.id}):
         # The activity is already in the inbox
         logger.info(f"received duplicate activity {activity!r}, dropping it")
@@ -170,6 +178,30 @@ def post_to_inbox(activity: ap.BaseActivity) -> None:
     Tasks.finish_post_to_inbox(activity.id)
 
 
+def save_reply(activity: ap.BaseActivity, meta: Dict[str, Any] = {}) -> None:
+    visibility = ap.get_visibility(activity)
+    is_public = False
+    if visibility in [ap.Visibility.PUBLIC, ap.Visibility.UNLISTED]:
+        is_public = True
+
+    DB.replies.insert_one(
+        {
+            "activity": activity.to_dict(),
+            "type": _to_list(activity.type),
+            "remote_id": activity.id,
+            "meta": {
+                "undo": False,
+                "deleted": False,
+                "public": is_public,
+                "server": urlparse(activity.id).netloc,
+                "visibility": visibility.name,
+                "actor_id": activity.get_actor().id,
+                **meta,
+            },
+        }
+    )
+
+
 def post_to_outbox(activity: ap.BaseActivity) -> str:
     if activity.has_type(ap.CREATE_TYPES):
         activity = activity.build_create()

core/meta.py

@@ -98,4 +98,4 @@ def upsert(data: Dict[MetaKey, Any]) -> _SubQuery:
 
 
 def published_after(dt: datetime) -> _SubQuery:
-    return flag(MetaKey.PUBLISHED, {"gt": ap.format(dt)})
+    return flag(MetaKey.PUBLISHED, {"gt": ap.format_datetime(dt)})

core/notifications.py

@@ -140,14 +140,14 @@ def _announce_set_inbox_flags(activity: ap.Announce, new_meta: _NewMeta) -> None
         _set_flag(new_meta, MetaKey.GC_KEEP)
 
     # Dedup boosts (it's annoying to see the same note multipe times on the same page)
-    # if not find_one_activity(
-    #    {
-    #        **in_inbox(),
-    #        **by_object_id(obj.id),
-    #        **flag(MetaKey.STREAM, True),
-    #        **published_after(datetime.now(timezone.utc) - timedelta(hours=12)),
-    #    }
-    # ):
+    if not find_one_activity(
+        {
+            **in_inbox(),
+            **by_object_id(obj.id),
+            **flag(MetaKey.STREAM, True),
+            **published_after(datetime.now(timezone.utc) - timedelta(hours=12)),
+        }
+    ):
         # Display it in the stream only it not there already (only looking at the last 12 hours)
         _set_flag(new_meta, MetaKey.STREAM)
 

core/tasks.py

@@ -44,6 +44,10 @@ class Tasks:
     def fetch_og_meta(iri: str) -> None:
         p.push(iri, "/task/fetch_og_meta")
 
+    @staticmethod
+    def process_reply(iri: str) -> None:
+        p.push(iri, "/task/process_reply")
+
     @staticmethod
     def process_new_activity(iri: str) -> None:
         p.push(iri, "/task/process_new_activity")

requirements.txt

@@ -21,6 +21,5 @@ git+https://github.com/erikriver/opengraph.git
 git+https://github.com/tsileo/little-boxes.git@litepub
 pyyaml
 pillow
-cachetools
 emoji-unicode
 html5lib