module Grape
  module ErrorFormatter
    module Json
      class << self

        def call(message, backtrace, options = {}, env = nil)
          result = message.is_a?(Hash) ? message : { :error => message }
          if (options[:rescue_options] || {})[:backtrace] && backtrace && ! backtrace.empty?
            result = result.merge({ :backtrace => backtrace })
          end
          MultiJson.dump(result)
        end

      end
    end
  end
end