Contents

class RestModel
  module Source
    class Translation
      attr_accessor :values, :from_source, :to_source

      def initialize(attrs = {})
        @values      = attrs[:values]
        @from_source = attrs[:from_source]
        @to_source   = attrs[:to_source]
      end

      def translates_from_source?
        from_source or values
      end

      def translate_from_source(value, resource)
        if from_source
          resource.instance_exec(value, &from_source)
        elsif values
          translate_from_source_values(value)
        else
          value
        end
      end

      def translates_to_source?
        to_source or values
      end

      def translate_to_source(value, resource)
        if to_source
          resource.instance_exec(value, &to_source)
        elsif values
          translate_to_source_values(value)
        else
          value
        end
      end

      private

      def translate_from_source_values(value)
        if values.kind_of?(Hash)
          unless values.has_value?(value)
            fail TranslationError, "value '#{value}' doesn't belong to values: #{values.values}"
          end

          values.key(value)
        elsif values.kind_of?(Array)
          unless values.member?(value)
            fail TranslationError, "value '#{value}' doesn't belong to values in: #{values}"
          end

          value
        else
          fail TranslationError, "not supported values"
        end
      end

      def translate_to_source_values(value)
        if values.kind_of?(Hash)
          unless values.has_key?(value)
            fail TranslationError, "value '#{value}' doesn't belong to values: #{values.keys}"
          end

          values[value]
        elsif values.kind_of?(Array)
          unless values.member?(value)
            fail TranslationError, "value '#{value}' doesn't belong to values in: #{values}"
          end

          value
        else
          fail TranslationError, "not supported values"
        end
      end
    end
  end
end

Version data entries

7 entries across 7 versions & 1 rubygems

Version	Path
rest_model-0.3.1	lib/rest_model/source/translation.rb
rest_model-0.3.0	lib/rest_model/source/translation.rb
rest_model-0.2.3	lib/rest_model/source/translation.rb
rest_model-0.2.1	lib/rest_model/source/translation.rb
rest_model-0.2.0	lib/rest_model/source/translation.rb
rest_model-0.1.24	lib/rest_model/source/translation.rb
rest_model-0.1.23	lib/rest_model/source/translation.rb