module Doorkeeper::OAuth::Helpers::ScopeChecker

def self.matches?(current_scopes, scopes)
  return false if current_scopes.nil? || scopes.nil?
  current_scopes == scopes
end

def self.valid?(scope, server_scopes)
  scope.present? &&
  scope !~ /[\n|\r|\t]/ &&
  server_scopes.has_scopes?(Doorkeeper::OAuth::Scopes.from_string(scope))
end