class Doorkeeper::OAuth::Client::Credentials

def blank?
  uid.blank? || secret.blank?
end

def from_basic(request)
  authorization = request.authorization
  if authorization.present? && authorization =~ /^Basic (.*)/m
    Base64.decode64($1).split(/:/, 2)
  end
end

def from_params(request)
  request.parameters.values_at(:client_id, :client_secret)
end

def from_request(request, *credentials_methods)
  credentials_methods.inject(nil) do |credentials, method|
    method = self.method(method) if method.is_a?(Symbol)
    credentials = Credentials.new(*method.call(request))
    break credentials unless credentials.blank?
  end
end