1 files changed, 60 insertions, 0 deletions
diff --git a/app/services/issuable/clone/base_service.rb b/app/services/issuable/clone/base_service.rb
new file mode 100644
index 00000000000..42dd9c666f5
--- /dev/null
+++ b/app/services/issuable/clone/base_service.rb
@@ -0,0 +1,60 @@
+# frozen_string_literal: true
+
+module Issuable
+  module Clone
+    class BaseService < IssuableBaseService
+      attr_reader :original_entity, :new_entity
+
+      alias_method :old_project, :project
+
+      def execute(original_entity, new_project = nil)
+        @original_entity = original_entity
+
+        # Using transaction because of a high resources footprint
+        # on rewriting notes (unfolding references)
+        #
+        ActiveRecord::Base.transaction do
+          @new_entity = create_new_entity
+
+          update_new_entity
+          update_old_entity
+          create_notes
+        end
+      end
+
+      private
+
+      def update_new_entity
+        rewriters = [ContentRewriter, AttributesRewriter]
+
+        rewriters.each do |rewriter|
+          rewriter.new(current_user, original_entity, new_entity).execute
+        end
+      end
+
+      def update_old_entity
+        close_issue
+      end
+
+      def create_notes
+        add_note_from
+        add_note_to
+      end
+
+      def close_issue
+        close_service = Issues::CloseService.new(old_project, current_user)
+        close_service.execute(original_entity, notifications: false, system_note: false)
+      end
+
+      def new_parent
+        new_entity.project ? new_entity.project : new_entity.group
+      end
+
+      def group
+        if new_entity.project&.group && current_user.can?(:read_group, new_entity.project.group)
+          new_entity.project.group
+        end
+      end
+    end
+  end
+end