class Jcompiler
  def self.b(brand)
    %i(id, name, description).map do |sym|
      v = brand.send(sym)
      "\"#{sym}\":#{v.is_a?(String) ? ActiveSupport::JSON.encode(v) : v ? v.to_s : 'null'}"
    end
  end

  def self.a(brands)
    brands.map do |brand|
      "{#{b(brand).join(',')}}"
    end
  end

  def self.code(brands)
    "[#{a(brands).join(',')}]"
  end
end

class JcompilerHandler
  cattr_accessor :default_format
  self.default_format = Mime::JSON

  def self.call(template)
    "Jcompiler.code(@brands)"
  end
end

ActionView::Template.register_template_handler :jcompiler, JcompilerHandler