Module: CodeBox::CodeAttribute::ClassMethods

Defined in:
lib/code-box/code_attribute.rb

Constant Summary collapse

DefaultOptions = 
{
  :foreign_code_attribute => :code,
  :lookup_type            => :i18n,
  :code_attribute_suffix  => 'code'
}

Instance Method Summary collapse

Instance Method Details

#code_attribute(*code_names) ⇒ Object Also known as: belongs_to_code 



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# File 'lib/code-box/code_attribute.rb', line 48

def code_attribute(*code_names)
  options                = code_names.extract_options!
  opts                   = DefaultOptions.merge(options)
  lookup_type            = opts.delete(:lookup_type)
  code_attr_suffix       = (opts.delete(:code_attribute_suffix) || "code").to_s
  foreign_code_attr_name = opts.delete(:foreign_code_attribute)

  code_names.each do |code_name|
    opts_copy = opts.dup
    code_attr_name  = (opts_copy.delete(:attribute_name) || "#{code_name}_#{code_attr_suffix}").to_s
    code_class_name = opts_copy.delete(:class_name) || "::Codes::#{code_name.to_s.camelize}"

    case lookup_type
      when :lookup
        class_eval <<-RUBY_
          # getter
          def #{code_name}
            #{code_class_name}.for_code(#{code_attr_name})
          end

          # setter
          def #{code_name}=(code)
            value = code.#{foreign_code_attr_name}
            #{code_attr_name} = value
          end
        RUBY_

      when :associated
        association_options = opts_copy.merge({
            :class_name  => "#{code_class_name}",
            :foreign_key => "#{code_attr_name}".to_sym,
            :primary_key => "#{foreign_code_attr_name}"
        })
        belongs_to "#{code_name}".to_sym, association_options

      when :i18n
        class_eval <<-RUBY_
          # getter
          def #{code_name}(locale=I18n.locale)
            code = self.#{code_attr_name}
            self.class.translate_#{code_attr_name}(code, :locale => locale)
          end

          # setter
          def #{code_name}=(code)
            raise "#{code_name} is a i18n code and can not be set. Use the the correct method '#{code_attr_name}='' instead."
          end

          # translator
          class << self
            def translate_#{code_attr_name}(*code)
              options           = code.extract_options!
              locale            = options[:locale] || I18n.locale
              codes             = code.first
              is_paramter_array = codes.kind_of? Array

              codes = Array(codes)
              translated_codes = codes.map { |code|
                code_key = code.nil? ? :null_value : code
                I18n.t("\#{self._code_box_i18n_model_segment}.values.\#{self.name.underscore}.#{code_attr_name}.\#{code_key}", :locale => locale)
              }

              if options[:build] == :zip
                translated_codes.zip(codes)
              else
                is_paramter_array ? translated_codes : translated_codes.first
              end
            end
          end
        RUBY_
      else
        raise ArgumentError, "'#{lookup_type}' is not valid. Must be one of [:code_cache, :association]"
    end
  end
end