public static async Task <DBlocalContact> didScanBarcode(string barcode_, string symbology, StatusLookup callback)
{
if (callback == null)
{
throw new ArgumentNullException("Callback must not be null to handle result");
}
var barcode = barcode_.Trim();
DBlocalContact temporaryContact = null;
if (symbology == "QR")
{
if (!OfflineLogic.isBarcodeValid(barcode))
{
throw new InvalidOperationException("The QR code cannot be used by BoaBee because it is not a contact or an ID.");
}
else if (barcode.Contains("BEGIN:VCARD"))
{
//VCard
temporaryContact = OfflineLogic.parseAsVCard(barcode);
}
else if (barcode.StartsWith("[[") && barcode.EndsWith("]]"))
{
//Artexis
temporaryContact = OfflineLogic.parseAsArtexis(barcode);
}
else
{
//unknown format
temporaryContact = new DBlocalContact();
temporaryContact.uid = barcode;
}
}
else
{
//unknown format
temporaryContact = new DBlocalContact();
temporaryContact.uid = barcode;
}
DBAppSettings appSettings = DBLocalDataStore.GetInstance().GetAppSettings();
if (appSettings == null)
{
appSettings = new DBAppSettings();
appSettings.instantContactCheck = true;
DBLocalDataStore.GetInstance().SetAppSettings(appSettings);
}
string message = string.Empty;
if (appSettings.instantContactCheck)
{
var localContact = DBLocalDataStore.GetInstance().GetLocalContactsByUID(temporaryContact.uid);
if (localContact != null)
{
temporaryContact &= localContact;
temporaryContact.Id = localContact.Id;
}
if (await Reachability.isConnected())
{
try
{
int timeout = 10000;
var timeoutCancellationTokenSource = new CancellationTokenSource();
var timeoutTask = Task.Delay(timeout, timeoutCancellationTokenSource.Token);
var task = NetworkRequests.contactLookup(temporaryContact.uid);
DBlocalContact serverContact = null;
if (await Task.WhenAny(task, timeoutTask) == task)
{
// Task completed within timeout.
// Consider that the task may have faulted or been canceled.
// We re-await the task so that any exceptions/cancellation is rethrown.
timeoutCancellationTokenSource.Cancel();
serverContact = await task;
if (serverContact != null)
{
if (serverContact.hasOnlyUID() || serverContact.hasOnlyUIDAndName())
{
message = "Check for additional contact details can't be executed at this moment. More details will be added to your report if available.";
}
else
{
message = "These are the details we have found for you. Feel free to complete the rest below.";
}
}
else
{
message = "Check for additional contact details can't be executed at this moment. More details will be added to your report if available.";
}
Console.Error.WriteLine("Server has contact: {0}", serverContact != null);
}
else
{
// timeout/cancellation logic
message = "Check for additional contact details can't be executed at this moment. More details will be added to your report if available.";
Console.Error.WriteLine("Timed out");
}
temporaryContact *= serverContact;
}
catch (Exception e)
{
message = "Check for additional contact details can't be executed at this moment. More details will be added to your report if available.";
Console.Error.WriteLine("contactLookup exception: {0}", e.Message);
}
}
else
{
message = "Check for additional contact details can't be executed at this moment. More details will be added to your report if available.";
}
}
else
{
message = "Instant contact checking is turned off";
}
callback(message);
return(temporaryContact);
}