Move common behavior to to IssuableBaseService

app/services/issuable_base_service.rb

@@ -71,6 +71,19 @@ class IssuableBaseService < BaseService
     end
   end
 
+  def have_changes?(issuable, options = {})
+    valid_attrs = [:title, :description, :assignee_id, :milestone_id, :target_branch]
+
+    attrs_changed = valid_attrs.any? do |attr|
+      issuable.previous_changes.include?(attr.to_s)
+    end
+
+    old_labels = options[:old_labels]
+    labels_changed = old_labels && issuable.labels != old_labels
+
+    attrs_changed || labels_changed
+  end
+
   def handle_common_system_notes(issuable, options = {})
     if issuable.previous_changes.include?('title')
       create_title_change_note(issuable, issuable.previous_changes['title'].first)

app/services/issues/update_service.rb

@@ -27,22 +27,5 @@ module Issues
     def close_service
       Issues::CloseService
     end
-
-    private
-
-    def have_changes?(issue, options = {})
-      valid_attrs = [:title, :description, :assignee_id, :milestone_id]
-
-      attrs_changed = valid_attrs.any? do |attr|
-        issue.previous_changes.include?(attr.to_s)
-      end
-
-      old_labels = options[:old_labels]
-      labels_changed = old_labels && issue.labels != old_labels
-
-      if attrs_changed || labels_changed
-        task_service.mark_as_done(issue, current_user)
-      end
-    end
   end
 end

app/services/merge_requests/update_service.rb

@@ -48,22 +48,5 @@ module MergeRequests
     def close_service
       MergeRequests::CloseService
     end
-
-    private
-
-    def have_changes?(merge_request, options = {})
-      valid_attrs = [:title, :description, :assignee_id, :milestone_id, :target_branch]
-
-      attrs_changed = valid_attrs.any? do |attr|
-        merge_request.previous_changes.include?(attr.to_s)
-      end
-
-      old_labels = options[:old_labels]
-      labels_changed = old_labels && merge_request.labels != old_labels
-
-      if attrs_changed || labels_changed
-        task_service.mark_as_done(merge_request, current_user)
-      end
-    end
   end
 end