rubymotion/BubbleWrap

module BubbleWrap

  # Handles JSON encoding and decoding in a similar way Ruby 1.9 does.
  module JSON

    class ParserError < StandardError; end

    # Parses a string or data object and converts it in data structure.
    #
    # @param [String, NSData] str_data the string or data to serialize.
    # @raise [ParserError] If the parsing of the passed string/data isn't valid.
    # @return [Hash, Array, NilClass] the converted data structure, nil if the incoming string isn't valid.
    #
    # TODO: support options like the C Ruby module does
    def self.parse(str_data, &block)
      return nil unless str_data
      data = str_data.respond_to?('dataUsingEncoding:') ? str_data.dataUsingEncoding(NSUTF8StringEncoding) : str_data
      opts = NSJSONReadingMutableContainers | NSJSONReadingMutableLeaves | NSJSONReadingAllowFragments
      error = Pointer.new(:id)
      obj = NSJSONSerialization.JSONObjectWithData(data, options:opts, error:error)
      raise ParserError, error[0].description if error[0]
      if block_given?
        yield obj
      else
        obj
      end

    end

    def self.generate(obj)
      NSJSONSerialization.dataWithJSONObject(obj, options:0, error:nil).to_str
    end

  end
end