module Github::Utils::Url

def build_query(params)
  params.map { |k, v|
    if v.class == Array
      build_query(v.map { |x| [k, x] })
    else
      v.nil? ? escape(k) : "#{escape(k)}=#{escape(v)}"
    end
  }.join("&")
end

def escape(s) CGI.escape(s.to_s) end

def escape_uri(s) Addressable::URI.escape(s.to_s) end

def normalize(s) Addressable::URI.parse(s.to_s).normalize.path end

def parse_query(query_string)
  return '' if query_string.nil? || query_string.empty?
  params = {}
  query_string.split(DEFAULT_QUERY_SEP).each do |part|
    k, v = part.split(KEY_VALUE_SEP, 2).map { |el| unescape(el) }
    if cur = params[k]
      if cur.class == Array
        params[k] << v
      else
        params[k] = [cur, v]
      end
    else
      params[k] = v
    end
  end
  params
end

def parse_query_for_param(query_string, name)
  parse_query(query_string).each do |key, val|
    return val.first if (name == key) && val.is_a?(Array)
    return val if (name == key)
  end
  return nil
end

def unescape(s) CGI.unescape(s.to_s) end