Add remove from followers api (#16864)

* Add followed_by? to account_interactions

* Add RemoveFromFollowersService

* Fix AccountBatch to use RemoveFromFollowersService

* Add remove from followers API

1 files changed, 25 insertions, 0 deletions

diff --git a/app/services/remove_from_followers_service.rb b/app/services/remove_from_followers_service.rb
new file mode 100644
index 000000000..3dac5467f
--- /dev/null
+++ b/app/services/remove_from_followers_service.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+class RemoveFromFollowersService < BaseService
+  include Payloadable
+
+  def call(source_account, target_accounts)
+    source_account.passive_relationships.where(account_id: target_accounts).find_each do |follow|
+      follow.destroy
+
+      if source_account.local? && !follow.account.local? && follow.account.activitypub?
+        create_notification(follow)
+      end
+    end
+  end
+
+  private
+
+  def create_notification(follow)
+    ActivityPub::DeliveryWorker.perform_async(build_json(follow), follow.target_account_id, follow.account.inbox_url)
+  end
+
+  def build_json(follow)
+    Oj.dump(serialize_payload(follow, ActivityPub::RejectFollowSerializer))
+  end
+end