/**
* Performs the account linking for login_link
*
* @param array $link_data The same variable given to {@see \phpbb\auth\provider\provider_interface::link_account}
* @param string $service_name The name of the service being used in
* linking.
* @return string|null Returns a language constant (string) if an error is
* encountered, or null on success.
*/
protected function link_account_login_link(array $link_data, $service_name)
{
$storage = new \phpbb\auth\provider\oauth\token_storage($this->db, $this->user, $this->auth_provider_oauth_token_storage_table, $this->auth_provider_oauth_state_table);
// Check for an access token, they should have one
if (!$storage->has_access_token_by_session($service_name)) {
return 'LOGIN_LINK_ERROR_OAUTH_NO_ACCESS_TOKEN';
}
// Prepare the query string
$query = 'mode=login_link&login_link_oauth_service=' . strtolower($link_data['oauth_service']);
// Prepare for an authentication request
$service_credentials = $this->service_providers[$service_name]->get_service_credentials();
$scopes = $this->service_providers[$service_name]->get_auth_scope();
$service = $this->get_service(strtolower($link_data['oauth_service']), $storage, $service_credentials, $query, $scopes);
$this->service_providers[$service_name]->set_external_service_provider($service);
// The user has already authenticated successfully, request to authenticate again
$unique_id = $this->service_providers[$service_name]->perform_token_auth();
// Insert into table, they will be able to log in after this
$data = array('user_id' => $link_data['user_id'], 'provider' => strtolower($link_data['oauth_service']), 'oauth_provider_id' => $unique_id);
$this->link_account_perform_link($data);
// Update token storage to store the user_id
$storage->set_user_id($link_data['user_id']);
}
