lib/pleroma/ecto_type/activity_pub/object_validators/object_id.ex

@@ -19,7 +19,7 @@ def cast(object) when is_binary(object) do
 
   def cast(%{"id" => object}), do: cast(object)
 
-  def cast(_), do: :error
+  def cast(o), do: {:error, o}
 
   def dump(data), do: {:ok, data}
 

lib/pleroma/user.ex

@@ -152,6 +152,7 @@ defmodule Pleroma.User do
     field(:also_known_as, {:array, ObjectValidators.ObjectID}, default: [])
     field(:inbox, :string)
     field(:shared_inbox, :string)
+    field(:outbox, :string, default: nil)
     field(:last_active_at, :naive_datetime)
     field(:disclose_client, :boolean, default: true)
     field(:pinned_objects, :map, default: %{})
@@ -469,6 +470,7 @@ def remote_user_changeset(struct \\ %User{local: false}, params) do
         :ap_id,
         :inbox,
         :shared_inbox,
+        :outbox,
         :nickname,
         :avatar,
         :ap_enabled,

lib/pleroma/web/activity_pub/activity_pub.ex

@@ -1587,7 +1587,8 @@ defp object_to_user_data(data, additional) do
     actor_type = data["type"] || "Person"
 
     featured_address = data["featured"]
-    {:ok, pinned_objects} = fetch_and_prepare_featured_from_ap_id(featured_address)
+    {:ok, pinned_objects} = fetch_and_prepare_outbox_from_ap_id(featured_address)
+    outbox_address = data["outbox"]
 
     # first, check that the owner is correct
     signing_key =
@@ -1644,6 +1645,7 @@ defp object_to_user_data(data, additional) do
       also_known_as: also_known_as,
       signing_key: signing_key,
       inbox: data["inbox"],
+      outbox: outbox_address,
       shared_inbox: shared_inbox,
       pinned_objects: pinned_objects,
       nickname: nickname
@@ -1790,7 +1792,7 @@ def maybe_handle_clashing_nickname(data) do
     end
   end
 
-  def pin_data_from_featured_collection(%{
+  def activity_data_from_outbox_collection(%{
         "type" => "OrderedCollection",
         "first" => first
       }) do
@@ -1805,7 +1807,7 @@ def pin_data_from_featured_collection(%{
     end
   end
 
-  def pin_data_from_featured_collection(
+  def activity_data_from_outbox_collection(
         %{
           "type" => type
         } = collection
@@ -1821,21 +1823,23 @@ def pin_data_from_featured_collection(
     end)
   end
 
-  def pin_data_from_featured_collection(obj) do
-    Logger.error("Could not parse featured collection #{inspect(obj)}")
+  def activity_data_from_outbox_collection(obj) do
+    Logger.error("Could not parse outbox collection #{inspect(obj)}")
     %{}
   end
 
-  def fetch_and_prepare_featured_from_ap_id(nil) do
+  def fetch_and_prepare_outbox_from_ap_id(nil) do
     {:ok, %{}}
   end
 
-  def fetch_and_prepare_featured_from_ap_id(ap_id) do
+  def fetch_and_prepare_outbox_from_ap_id(ap_id) do
+    Logger.info("Fetching outbox #{ap_id}")
+
     with {:ok, data} <- Fetcher.fetch_and_contain_remote_object_from_id(ap_id) do
-      {:ok, pin_data_from_featured_collection(data)}
+      {:ok, activity_data_from_outbox_collection(data)}
     else
       e ->
-        Logger.error("Could not decode featured collection at fetch #{ap_id}, #{inspect(e)}")
+        Logger.error("Could not decode outbox collection at fetch #{ap_id}, #{inspect(e)}")
         {:ok, %{}}
     end
   end
@@ -1854,6 +1858,19 @@ def enqueue_pin_fetches(%{pinned_objects: pins}) do
 
   def enqueue_pin_fetches(_), do: nil
 
+  def enqueue_outbox_fetches(%{outbox: outbox_address}) do
+    # enqueue a task to fetch the outbox
+    Logger.debug("Refetching outbox #{outbox_address}")
+
+    Pleroma.Workers.RemoteFetcherWorker.enqueue("fetch_outbox", %{
+      "id" => outbox_address
+    })
+
+    :ok
+  end
+
+  def enqueue_outbox_fetches(_), do: :error
+
   def make_user_from_ap_id(ap_id, additional \\ []) do
     user = User.get_cached_by_ap_id(ap_id)
 

lib/pleroma/web/activity_pub/transmogrifier.ex

@@ -637,7 +637,10 @@ defp handle_incoming_normalised(
     end
   end
 
-  defp handle_incoming_normalised(_, _), do: :error
+  defp handle_incoming_normalised(%{"object" => o}, options),
+    do: handle_incoming_normalised(o, options)
+
+  defp handle_incoming_normalised(o, _), do: {:error, {:unknown_object_class, o}}
 
   @spec get_obj_helper(String.t(), Keyword.t()) :: {:ok, Object.t()} | nil
   def get_obj_helper(id, options \\ []) do

lib/pleroma/web/mastodon_api/controllers/account_controller.ex

@@ -306,6 +306,8 @@ def show(%{assigns: %{user: for_user}} = conn, %{id: nickname_or_id} = params) d
   def statuses(%{assigns: %{user: reading_user}} = conn, params) do
     with %User{} = user <- User.get_cached_by_nickname_or_id(params.id, for: reading_user),
          :visible <- User.visible_for(user, reading_user) do
+      ActivityPub.enqueue_outbox_fetches(user)
+
       params =
         params
         |> Map.delete(:tagged)

lib/pleroma/workers/remote_fetcher_worker.ex

@@ -4,12 +4,32 @@
 
 defmodule Pleroma.Workers.RemoteFetcherWorker do
   alias Pleroma.Object.Fetcher
+  alias Pleroma.Object
+  alias Pleroma.Web.ActivityPub.ActivityPub
 
   use Pleroma.Workers.WorkerHelper,
     queue: "remote_fetcher",
     unique: [period: 300, states: Oban.Job.states(), keys: [:op, :id]]
 
   @impl Oban.Worker
+
+  def perform(%Job{args: %{"op" => "fetch_outbox", "id" => address}}) do
+    with {:ok, outbox} <- ActivityPub.fetch_and_prepare_outbox_from_ap_id(address) do
+      Enum.each(Enum.reverse(outbox), fn {ap_id, _} ->
+        if is_nil(Object.get_cached_by_ap_id(ap_id)) do
+          enqueue("fetch_remote", %{
+            "id" => ap_id,
+            "depth" => 1
+          })
+        end
+      end)
+
+      :ok
+    else
+      e -> {:error, e}
+    end
+  end
+
   def perform(%Job{args: %{"op" => "fetch_remote", "id" => id} = args}) do
     case Fetcher.fetch_object_from_id(id, depth: args["depth"]) do
       {:ok, _object} ->

priv/repo/migrations/20241027040000_users_add_outboxes.exs

@@ -0,0 +1,15 @@
+defmodule Pleroma.Repo.Migrations.UsersAddOutboxes do
+  use Ecto.Migration
+
+  def up do
+    alter table(:users) do
+      add_if_not_exists(:outbox, :text)
+    end
+  end
+
+  def down do
+    alter table(:users) do
+      remove_if_exists(:outbox, :text)
+    end
+  end
+end