/**
* Generates an authorization URL to begin the process of authenticating a user.
*
* @param string $redirectUrl The callback URL to redirect to.
* @param array $scope An array of permissions to request.
* @param string $state The CSPRNG-generated CSRF value.
* @param array $params An array of parameters to generate URL.
* @param string $separator The separator to use in http_build_query().
*
* @return string
*/
public function getAuthorizationUrl($redirectUrl, $state, array $scope = [], array $params = [], $separator = '&')
{
$params += ['client_id' => $this->app->getId(), 'state' => $state, 'response_type' => 'code', 'sdk' => 'php-sdk-' . Facebook::VERSION, 'redirect_uri' => $redirectUrl, 'scope' => implode(',', $scope)];
return $this->client->getBaseGraphUrl() . '/api/v1/oauth/authorize?' . http_build_query($params, null, $separator);
}
