module MergeRequests
  # PostMergeService class
  #
  # Mark existing merge request as merged
  # and execute all hooks and notifications
  #
  class PostMergeService < MergeRequests::BaseService
    def execute(merge_request)
      merge_request.mark_as_merged
      create_merge_event(merge_request, current_user)
      create_note(merge_request)
      notification_service.merge_mr(merge_request, current_user)
      execute_hooks(merge_request, 'merge')
    end

    private

    def create_merge_event(merge_request, current_user)
      EventCreateService.new.merge_mr(merge_request, current_user)
    end
  end
end