zhdk/madek

module Json
  module MetaDatumHelper

    def hash_for_meta_datum(meta_datum, with = nil)
      h = { 
        name: "#{meta_datum.meta_key.label}",
        value: ((s = meta_datum.to_s).blank? ? nil : s),
        raw_value: meta_datum.is_a?(MetaDatumString) ? meta_datum.value(current_user) : hash_for(meta_datum.value),
        type: MetaDatum.value_type_name(meta_datum.class)
      }

      if with ||= nil
        if with[:label] and with[:label].is_a? Hash and with[:label][:context]
          @cache_definition_labels ||= {}
          h[:label] = @cache_definition_labels[[with[:label][:context], meta_datum.meta_key_id]] ||= begin
            definition = meta_datum.meta_key.meta_key_definitions.for_context(with[:label][:context])
            definition.label.to_s
          end
        else
          h[:label] = if meta_datum.media_resource
            meta_datum.meta_key.all_context_labels(meta_datum.media_resource.individual_contexts)
          else
            meta_datum.meta_key.all_context_labels
          end
        end
      end
      
      h
    end
    
    alias :hash_for_meta_datum_copyright :hash_for_meta_datum
    alias :hash_for_meta_datum_date :hash_for_meta_datum
    alias :hash_for_meta_datum_institutional_groups :hash_for_meta_datum
    alias :hash_for_meta_datum_country :hash_for_meta_datum
    alias :hash_for_meta_datum_keywords :hash_for_meta_datum
    alias :hash_for_meta_datum_meta_terms :hash_for_meta_datum
    alias :hash_for_meta_datum_people :hash_for_meta_datum
    alias :hash_for_meta_datum_string :hash_for_meta_datum
    alias :hash_for_meta_datum_users :hash_for_meta_datum
    
  end
end