class Github::Response

def self.define_parser(&block)
  @parser = block
end

def initialize(app, options = {})
  super(app)
  @content_types = Array(options[:content_type])
end

def parse_body?(env)
  parse_response_type?(response_type(env)) and parse_response?(env)
end

def parse_response?(env)
  env[:body].respond_to?(:to_str)
end

def parse_response_type?(type)
  @content_types.empty? || @content_types.any? { |pattern|
    pattern.is_a?(Regexp) ? type =~ pattern : type == pattern
  }
end

def process_body(env)
  env[:body] = parse(env[:body])
end

def response_type(env)
  type = env[:response_headers][CONTENT_TYPE].to_s
  type = type.split(';', 2).first if type.index(';')
  type
end