From 3a4773c3c2bd0bbef244eb519b07208da9108e49 Mon Sep 17 00:00:00 2001
From: dcc <dcc@logografos.com>
Date: Sat, 2 Sep 2023 00:52:52 -0700
Subject: First

---
 lib/pleroma/web/activity_pub/pipeline.ex | 82 ++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 lib/pleroma/web/activity_pub/pipeline.ex

(limited to 'lib/pleroma/web/activity_pub/pipeline.ex')

diff --git a/lib/pleroma/web/activity_pub/pipeline.ex b/lib/pleroma/web/activity_pub/pipeline.ex
new file mode 100644
index 0000000..ca8653a
--- /dev/null
+++ b/lib/pleroma/web/activity_pub/pipeline.ex
@@ -0,0 +1,82 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ActivityPub.Pipeline do
+  alias Pleroma.Activity
+  alias Pleroma.Config
+  alias Pleroma.Object
+  alias Pleroma.Repo
+  alias Pleroma.Utils
+  alias Pleroma.Web.ActivityPub.ActivityPub
+  alias Pleroma.Web.ActivityPub.MRF
+  alias Pleroma.Web.ActivityPub.ObjectValidator
+  alias Pleroma.Web.ActivityPub.SideEffects
+  alias Pleroma.Web.ActivityPub.Visibility
+  alias Pleroma.Web.Federator
+
+  defp side_effects, do: Config.get([:pipeline, :side_effects], SideEffects)
+  defp federator, do: Config.get([:pipeline, :federator], Federator)
+  defp object_validator, do: Config.get([:pipeline, :object_validator], ObjectValidator)
+  defp mrf, do: Config.get([:pipeline, :mrf], MRF)
+  defp activity_pub, do: Config.get([:pipeline, :activity_pub], ActivityPub)
+  defp config, do: Config.get([:pipeline, :config], Config)
+
+  @spec common_pipeline(map(), keyword()) ::
+          {:ok, Activity.t() | Object.t(), keyword()} | {:error, any()}
+  def common_pipeline(object, meta) do
+    case Repo.transaction(fn -> do_common_pipeline(object, meta) end, Utils.query_timeout()) do
+      {:ok, {:ok, activity, meta}} ->
+        side_effects().handle_after_transaction(meta)
+        {:ok, activity, meta}
+
+      {:ok, value} ->
+        value
+
+      {:error, e} ->
+        {:error, e}
+
+      {:reject, e} ->
+        {:reject, e}
+    end
+  end
+
+  def do_common_pipeline(%{__struct__: _}, _meta), do: {:error, :is_struct}
+
+  def do_common_pipeline(message, meta) do
+    with {_, {:ok, message, meta}} <- {:validate, object_validator().validate(message, meta)},
+         {_, {:ok, message, meta}} <- {:mrf, mrf().pipeline_filter(message, meta)},
+         {_, {:ok, message, meta}} <- {:persist, activity_pub().persist(message, meta)},
+         {_, {:ok, message, meta}} <- {:side_effects, side_effects().handle(message, meta)},
+         {_, {:ok, _}} <- {:federation, maybe_federate(message, meta)} do
+      {:ok, message, meta}
+    else
+      {:mrf, {:reject, message, _}} -> {:reject, message}
+      e -> {:error, e}
+    end
+  end
+
+  defp maybe_federate(%Object{}, _), do: {:ok, :not_federated}
+
+  defp maybe_federate(%Activity{} = activity, meta) do
+    with {:ok, local} <- Keyword.fetch(meta, :local) do
+      do_not_federate = meta[:do_not_federate] || !config().get([:instance, :federating])
+
+      if !do_not_federate and local and not Visibility.is_local_public?(activity) do
+        activity =
+          if object = Keyword.get(meta, :object_data) do
+            %{activity | data: Map.put(activity.data, "object", object)}
+          else
+            activity
+          end
+
+        federator().publish(activity)
+        {:ok, :federated}
+      else
+        {:ok, :not_federated}
+      end
+    else
+      _e -> {:error, :badarg}
+    end
+  end
+end
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