module Google::Auth::ScopeUtil

def self.as_array(scope)
  case scope
  when Array
    scope
  when String
    scope.split(' ')
  else
    raise 'Invalid scope value. Must be string or array'
  end
end

def self.normalize(scope)
  list = as_array(scope)
  list.map { |item| ALIASES[item] || item }
end