class RedirectUriValidator

def self.test_redirect_uri
  Doorkeeper.configuration.test_redirect_uri
end

def test_redirect_uri?(uri)
  self.class.test_redirect_uri.present? && uri.to_s == self.class.test_redirect_uri.to_s
end

def validate_each(record, attribute, value)
  uri = ::URI.parse(value)
  return if test_redirect_uri?(uri)
  record.errors.add(attribute, :fragment_present) unless uri.fragment.nil?
  record.errors.add(attribute, :relative_uri) if uri.scheme.nil? || uri.host.nil?
  record.errors.add(attribute, :has_query_parameter) unless uri.query.nil?
rescue URI::InvalidURIError
  record.errors.add(attribute, :invalid_uri)
end