Unfollow should also unsubscribe

CHANGELOG.md

@@ -10,6 +10,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Configuration: Filter.AnonymizeFilename added ability to retain file extension with custom text
 - Federation: Return 403 errors when trying to request pages from a user's follower/following collections if they have `hide_followers`/`hide_follows` set
 - NodeInfo: Return `skipThreadContainment` in `metadata` for the `skip_thread_containment` option
+- Mastodon API: Unsubscribe followers when they unfollow a user
 
 ### Fixed
 - Not being able to pin unlisted posts

lib/pleroma/web/common_api/common_api.ex

@@ -31,7 +31,8 @@ def follow(follower, followed) do
 
   def unfollow(follower, unfollowed) do
     with {:ok, follower, _follow_activity} <- User.unfollow(follower, unfollowed),
-         {:ok, _activity} <- ActivityPub.unfollow(follower, unfollowed) do
+         {:ok, _activity} <- ActivityPub.unfollow(follower, unfollowed),
+         {:ok, _unfollowed} <- User.unsubscribe(follower, unfollowed) do
       {:ok, follower}
     end
   end

test/web/common_api/common_api_test.exs

@@ -346,6 +346,20 @@ test "remove a reblog mute", %{muter: muter, muted: muted} do
     end
   end
 
+  describe "unfollow/2" do
+    test "also unsubscribes a user" do
+      [follower, followed] = insert_pair(:user)
+      {:ok, follower, followed, _} = CommonAPI.follow(follower, followed)
+      {:ok, followed} = User.subscribe(follower, followed)
+
+      assert User.subscribed_to?(follower, followed)
+
+      {:ok, follower} = CommonAPI.unfollow(follower, followed)
+
+      refute User.subscribed_to?(follower, followed)
+    end
+  end
+
   describe "accept_follow_request/2" do
     test "after acceptance, it sets all existing pending follow request states to 'accept'" do
       user = insert(:user, info: %{locked: true})