/**
* Get facebook login url
*
* @param string|array $redirectUrl Url where facebook redirects after login.
* Router::url() compatible
* @param array $scope Facebook permissions
* @return string Login URL
*/
public function getLoginUrl($redirectUrl = null, $scope = array())
{
$params = array();
// scope
$scope = is_array($scope) ? $scope : explode(',', trim($scope));
$params['scope'] = array_unique(array_merge(Configure::read('Facebook.scope'), $scope));
// redirect url
if ($redirectUrl) {
$params['redirect_uri'] = Router::url($redirectUrl, true);
}
return $this->FacebookApi->getLoginUrl($params);
}
