zammad/lib/import/otrs/history_factory.rb

module Import
  module OTRS
    module HistoryFactory
      extend Import::Factory

      # rubocop:disable Style/ModuleFunction
      extend self

      def skip?(record, *_args)
        return true if !determine_class(record)
        false
      end

      def backend_class(record, *_args)
        "Import::OTRS::History::#{determine_class(record)}".constantize
      end

      private

      def determine_class(history)
        check_supported(history) || check_article(history)
      end

      def supported_types
        %w[NewTicket StateUpdate Move PriorityUpdate]
      end

      def check_supported(history)
        return if !supported_types.include?(history['HistoryType'])
        history['HistoryType']
      end

      def check_article(history)
        return if !history['ArticleID']
        return if history['ArticleID'].to_i.zero?
        'Article'
      end
    end
  end
end