inossidabile/styx

module Styx
  module Forms    
    def styx_form_store_and_respond(entity, data=nil, &block)
      response.content_type = Mime::TEXT

      if entity.save
        styx_form_respond_success(data, entity, &block)
      else
        styx_form_respond_failure(entity.class.name, entity.errors.messages)
      end
    end

    def styx_form_respond_failure(entity, errors)
      response.content_type = Mime::TEXT

      errors = Hash[*errors.map {|x| [x, nil]}.flatten] if errors.is_a?(Array)
      render :text => {:entity => entity.to_s.underscore.gsub('/', '_'), :messages => errors}.to_json, :status => :unprocessable_entity
    end

    def styx_form_respond_success(data, entity=nil, &block)
      response.content_type = Mime::TEXT

      block.call(entity) if block_given?
      render :text => (data.is_a?(Proc) ? data.call(entity) : data)
    end
  end
end