From f988d82e463d2c08fa2cc22dc6ee733ee8668671 Mon Sep 17 00:00:00 2001
From: lain <lain@soykaf.club>
Date: Tue, 11 Aug 2020 17:26:01 +0200
Subject: [PATCH] Transmogrifier: Handle accepts with the pipeline

---
 lib/pleroma/web/activity_pub/side_effects.ex  | 28 ++++++++++++++++
 .../web/activity_pub/transmogrifier.ex        | 32 +------------------
 .../transmogrifier/accept_handling_test.exs   |  2 +-
 3 files changed, 30 insertions(+), 32 deletions(-)

diff --git a/lib/pleroma/web/activity_pub/side_effects.ex b/lib/pleroma/web/activity_pub/side_effects.ex
index 5104d38ee..3ba7eaf9e 100644
--- a/lib/pleroma/web/activity_pub/side_effects.ex
+++ b/lib/pleroma/web/activity_pub/side_effects.ex
@@ -21,9 +21,37 @@ defmodule Pleroma.Web.ActivityPub.SideEffects do
   alias Pleroma.Web.Push
   alias Pleroma.Web.Streamer
   alias Pleroma.Workers.BackgroundWorker
+  alias Pleroma.FollowingRelationship
 
   def handle(object, meta \\ [])
 
+  # Task this handles
+  # - Follows
+  # - Sends a notification
+  def handle(
+        %{
+          data: %{
+            "actor" => actor,
+            "type" => "Accept",
+            "object" => follow_activity_id
+          }
+        } = object,
+        meta
+      ) do
+    with %Activity{actor: follower_id} = follow_activity <-
+           Activity.get_by_ap_id(follow_activity_id),
+         %User{} = followed <- User.get_cached_by_ap_id(actor),
+         %User{} = follower <- User.get_cached_by_ap_id(follower_id),
+         {:ok, follow_activity} <- Utils.update_follow_state_for_all(follow_activity, "accept"),
+         {:ok, _relationship} <- FollowingRelationship.update(follower, followed, :follow_accept) do
+      Notification.update_notification_type(followed, follow_activity)
+      User.update_follower_count(followed)
+      User.update_following_count(follower)
+    end
+
+    {:ok, object, meta}
+  end
+
   # Tasks this handle
   # - Follows if possible
   # - Sends a notification
diff --git a/lib/pleroma/web/activity_pub/transmogrifier.ex b/lib/pleroma/web/activity_pub/transmogrifier.ex
index 5ea97e9b7..24da1ef9c 100644
--- a/lib/pleroma/web/activity_pub/transmogrifier.ex
+++ b/lib/pleroma/web/activity_pub/transmogrifier.ex
@@ -11,7 +11,6 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
   alias Pleroma.EctoType.ActivityPub.ObjectValidators
   alias Pleroma.FollowingRelationship
   alias Pleroma.Maps
-  alias Pleroma.Notification
   alias Pleroma.Object
   alias Pleroma.Object.Containment
   alias Pleroma.Repo
@@ -535,35 +534,6 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
     end
   end
 
-  def handle_incoming(
-        %{"type" => "Accept", "object" => follow_object, "actor" => _actor, "id" => id} = data,
-        _options
-      ) do
-    with actor <- Containment.get_actor(data),
-         {:ok, %User{} = followed} <- User.get_or_fetch_by_ap_id(actor),
-         {:ok, follow_activity} <- get_follow_activity(follow_object, followed),
-         {:ok, follow_activity} <- Utils.update_follow_state_for_all(follow_activity, "accept"),
-         %User{local: true} = follower <- User.get_cached_by_ap_id(follow_activity.data["actor"]),
-         {:ok, _relationship} <- FollowingRelationship.update(follower, followed, :follow_accept) do
-      User.update_follower_count(followed)
-      User.update_following_count(follower)
-
-      Notification.update_notification_type(followed, follow_activity)
-
-      ActivityPub.accept(%{
-        to: follow_activity.data["to"],
-        type: "Accept",
-        actor: followed,
-        object: follow_activity.data["id"],
-        local: false,
-        activity_id: id
-      })
-    else
-      _e ->
-        :error
-    end
-  end
-
   def handle_incoming(
         %{"type" => "Reject", "object" => follow_object, "actor" => _actor, "id" => id} = data,
         _options
@@ -643,7 +613,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
         %{"type" => type} = data,
         _options
       )
-      when type in ~w{Update Block Follow} do
+      when type in ~w{Update Block Follow Accept} do
     with {:ok, %User{}} <- ObjectValidator.fetch_actor(data),
          {:ok, activity, _} <-
            Pipeline.common_pipeline(data, local: false) do
diff --git a/test/web/activity_pub/transmogrifier/accept_handling_test.exs b/test/web/activity_pub/transmogrifier/accept_handling_test.exs
index bc4cc227d..77d468f5c 100644
--- a/test/web/activity_pub/transmogrifier/accept_handling_test.exs
+++ b/test/web/activity_pub/transmogrifier/accept_handling_test.exs
@@ -82,7 +82,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier.AcceptHandlingTest do
     accept_data =
       Map.put(accept_data, "object", Map.put(accept_data["object"], "actor", follower.ap_id))
 
-    :error = Transmogrifier.handle_incoming(accept_data)
+    {:error, _} = Transmogrifier.handle_incoming(accept_data)
 
     follower = User.get_cached_by_id(follower.id)