+ fetchers =
+ with %Activity{data: %{"type" => "Delete"}} <- activity,
+ %Object{id: object_id} <- Object.normalize(activity),
+ fetchers <- User.get_delivered_users_by_object_id(object_id),
+ _ <- Delivery.delete_all_by_object_id(object_id) do
+ fetchers
+ else
+ _ ->
+ []
+ end
+
+ Pleroma.Web.Salmon.remote_users(actor, activity) ++ followers ++ fetchers
+ end
+
+ defp get_cc_ap_ids(ap_id, recipients) do
+ host = Map.get(URI.parse(ap_id), :host)
+
+ recipients
+ |> Enum.filter(fn %User{ap_id: ap_id} -> Map.get(URI.parse(ap_id), :host) == host end)
+ |> Enum.map(& &1.ap_id)
+ end
+
+ defp maybe_use_sharedinbox(%User{info: %{source_data: data}}),
+ do: (is_map(data["endpoints"]) && Map.get(data["endpoints"], "sharedInbox")) || data["inbox"]
+
+ @doc """
+ Determine a user inbox to use based on heuristics. These heuristics
+ are based on an approximation of the ``sharedInbox`` rules in the
+ [ActivityPub specification][ap-sharedinbox].
+
+ Please do not edit this function (or its children) without reading
+ the spec, as editing the code is likely to introduce some breakage
+ without some familiarity.
+
+ [ap-sharedinbox]: https://www.w3.org/TR/activitypub/#shared-inbox-delivery
+ """
+ def determine_inbox(
+ %Activity{data: activity_data},
+ %User{info: %{source_data: data}} = user
+ ) do
+ to = activity_data["to"] || []
+ cc = activity_data["cc"] || []
+ type = activity_data["type"]
+
+ cond do
+ type == "Delete" ->
+ maybe_use_sharedinbox(user)
+
+ Pleroma.Constants.as_public() in to || Pleroma.Constants.as_public() in cc ->
+ maybe_use_sharedinbox(user)
+
+ length(to) + length(cc) > 1 ->
+ maybe_use_sharedinbox(user)
+
+ true ->
+ data["inbox"]
+ end
+ end
+
+ @doc """
+ Publishes an activity with BCC to all relevant peers.
+ """
+
+ def publish(%User{} = actor, %{data: %{"bcc" => bcc}} = activity)
+ when is_list(bcc) and bcc != [] do
+ public = is_public?(activity)
+ {:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
+
+ recipients = recipients(actor, activity)
+
+ recipients
+ |> Enum.filter(&User.ap_enabled?/1)
+ |> Enum.map(fn %{info: %{source_data: data}} -> data["inbox"] end)
+ |> Enum.filter(fn inbox -> should_federate?(inbox, public) end)
+ |> Instances.filter_reachable()
+ |> Enum.each(fn {inbox, unreachable_since} ->
+ %User{ap_id: ap_id} =
+ Enum.find(recipients, fn %{info: %{source_data: data}} -> data["inbox"] == inbox end)
+
+ # Get all the recipients on the same host and add them to cc. Otherwise, a remote
+ # instance would only accept a first message for the first recipient and ignore the rest.
+ cc = get_cc_ap_ids(ap_id, recipients)
+
+ json =
+ data
+ |> Map.put("cc", cc)
+ |> Jason.encode!()
+
+ Pleroma.Web.Federator.Publisher.enqueue_one(__MODULE__, %{
+ inbox: inbox,
+ json: json,
+ actor_id: actor.id,
+ id: activity.data["id"],
+ unreachable_since: unreachable_since
+ })
+ end)
+ end
+
+ @doc """
+ Publishes an activity to all relevant peers.
+ """
+ def publish(%User{} = actor, %Activity{} = activity) do