private async Task ProcessChangesToUserFolder(OneDriveUser user, SignalR.NotificationService notificationService)
{
var client = await SubscriptionController.GetOneDriveClientAsync(user);
List <string> filesChanged = new List <string>();
var knownFiles = user.FileNameAndETag;
var request = client.Drive.Special["approot"].Children.Request();
while (request != null)
{
var items = await request.GetAsync();
// Pull out the changes we're interested in
foreach (var item in items)
{
string etag;
if (knownFiles.TryGetValue(item.Name, out etag))
{
if (etag == item.ETag)
{
continue;
}
}
knownFiles[item.Name] = item.ETag;
filesChanged.Add(item.Name);
}
request = items.NextPageRequest;
}
notificationService.SendFileChangeNotification(filesChanged);
}
/// <summary>
/// Enumerate the changes detected by this notification
/// </summary>
/// <param name="notifications"></param>
/// <returns></returns>
private async Task ProcessNotificationsAsync(Models.OneDriveWebhookNotification[] notifications)
{
SignalR.NotificationService service = new SignalR.NotificationService();
service.SendNotificationToClient(notifications.ToList());
// In a production service, you should store notifications into a queue and process them on a WebJob or
// other background service runner
foreach (var notification in notifications)
{
var user = OneDriveUserManager.LookupUserForSubscriptionId(notification.SubscriptionId);
if (null != user)
{
await ProcessChangesToUserFolder(user, service);
}
}
}
