Unify Mastodon and Twitter follow implementations using CommonAPI

lib/pleroma/web/common_api/common_api.ex

@@ -14,6 +14,19 @@ defmodule Pleroma.Web.CommonAPI do
 
   import Pleroma.Web.CommonAPI.Utils
 
+  def follow(follower, followed) do
+    with {:ok, follower} <- User.maybe_direct_follow(follower, followed),
+         {:ok, activity} <- ActivityPub.follow(follower, followed),
+         {:ok, follower, followed} <-
+           User.wait_and_refresh(
+             Pleroma.Config.get([:activitypub, :follow_handshake_timeout]),
+             follower,
+             followed
+           ) do
+      {:ok, follower, followed, activity}
+    end
+  end
+
   def delete(activity_id, user) do
     with %Activity{data: %{"object" => %{"id" => object_id}}} <- Repo.get(Activity, activity_id),
          %Object{} = object <- Object.normalize(object_id),

lib/pleroma/web/mastodon_api/mastodon_api_controller.ex

@@ -733,14 +733,7 @@ def reject_follow_request(%{assigns: %{user: followed}} = conn, %{"id" => id}) d
 
   def follow(%{assigns: %{user: follower}} = conn, %{"id" => id}) do
     with %User{} = followed <- Repo.get(User, id),
-         {:ok, follower} <- User.maybe_direct_follow(follower, followed),
-         {:ok, _activity} <- ActivityPub.follow(follower, followed),
-         {:ok, follower, followed} <-
-           User.wait_and_refresh(
-             Config.get([:activitypub, :follow_handshake_timeout]),
-             follower,
-             followed
-           ) do
+         {:ok, follower, followed, _} <- CommonAPI.follow(follower, followed) do
       conn
       |> put_view(AccountView)
       |> render("relationship.json", %{user: follower, target: followed})
@@ -754,8 +747,7 @@ def follow(%{assigns: %{user: follower}} = conn, %{"id" => id}) do
 
   def follow(%{assigns: %{user: follower}} = conn, %{"uri" => uri}) do
     with %User{} = followed <- Repo.get_by(User, nickname: uri),
-         {:ok, follower} <- User.maybe_direct_follow(follower, followed),
-         {:ok, _activity} <- ActivityPub.follow(follower, followed) do
+         {:ok, follower, followed, _} <- CommonAPI.follow(follower, followed) do
       conn
       |> put_view(AccountView)
       |> render("account.json", %{user: followed, for: follower})

lib/pleroma/web/twitter_api/twitter_api.ex

@@ -28,18 +28,8 @@ def delete(%User{} = user, id) do
   end
 
   def follow(%User{} = follower, params) do
-    with {:ok, %User{} = followed} <- get_user(params),
-         {:ok, follower} <- User.maybe_direct_follow(follower, followed),
-         {:ok, activity} <- ActivityPub.follow(follower, followed),
-         {:ok, follower, followed} <-
-           User.wait_and_refresh(
-             Pleroma.Config.get([:activitypub, :follow_handshake_timeout]),
-             follower,
-             followed
-           ) do
-      {:ok, follower, followed, activity}
-    else
-      err -> err
+    with {:ok, %User{} = followed} <- get_user(params) do
+      CommonAPI.follow(follower, followed)
     end
   end
 

test/web/twitter_api/twitter_api_controller_test.exs

@@ -1762,8 +1762,6 @@ test "it approves a friend request" do
         |> assign(:user, user)
         |> post("/api/pleroma/friendships/approve", %{"user_id" => other_user.id})
 
-      user = Repo.get(User, user.id)
-
       assert relationship = json_response(conn, 200)
       assert other_user.id == relationship["id"]
       assert relationship["follows_you"] == true
@@ -1787,8 +1785,6 @@ test "it denies a friend request" do
         |> assign(:user, user)
         |> post("/api/pleroma/friendships/deny", %{"user_id" => other_user.id})
 
-      user = Repo.get(User, user.id)
-
       assert relationship = json_response(conn, 200)
       assert other_user.id == relationship["id"]
       assert relationship["follows_you"] == false