public async Task <PushNotificationsUnregisterResult> UnregisterFromPushNotifications(PushNotificationsUnregisterOptions options)
{
// Unregister in system if needed
if (options.ShouldUnregisterInSystem() && PushTokenStorageService.IsTokenRegisteredInSystem)
{
var tokenRemovedFromSystem = await UnregisterFromPushTokenInSystem();
if (!tokenRemovedFromSystem)
{
return(PushNotificationsUnregisterResult.Failed);
}
PushTokenStorageService.IsTokenRegisteredInSystem = false;
}
var token = PushTokenStorageService.PushToken;
if (string.IsNullOrEmpty(token))
{
return(PushNotificationsUnregisterResult.Success);
}
// Unregister on server if needed
if (options.ShouldUnregisterOnServer() && PushTokenStorageService.IsTokenSavedOnServer)
{
var tokenRemovedFromServer = await RemotePushNotificationsService
.RemovePushNotificationsToken(token).ConfigureAwait(false);
if (!tokenRemovedFromServer)
{
return(PushNotificationsUnregisterResult.ServerFailed);
}
PushTokenStorageService.IsTokenSavedOnServer = false;
}
// Clear token if it is unregistered both in the system (optional) and on server
PushTokenStorageService.PushToken = string.Empty;
return(PushNotificationsUnregisterResult.Success);
}
public static bool ShouldUnregisterOnServer(this PushNotificationsUnregisterOptions options) => options == PushNotificationsUnregisterOptions.OnServerOnly || options == PushNotificationsUnregisterOptions.InSystemAndOnServer;