public static async Task ImportAsync(IReadOnlyList <IStorageItem> items, IProgress <double> progress = null)
{
items = GetImportableItems(items);
AggregateProgress total = (progress != null) ? new AggregateProgress(progress) : null;
ISyncService sync = await App.Services.GetServiceAsync <ISyncService> ().ConfigureAwait(false);
DownloadManager downloads = await App.Services.GetServiceAsync <DownloadManager> ().ConfigureAwait(false);
List <Task> importTasks = new List <Task> ();
foreach (IStorageItem item in items)
{
var node = total?.CreateProgressNode();
if (item is IStorageFolder folder)
{
var children = await folder.GetItemsAsync();
importTasks.Add(ImportAsync(children, node));
}
else if (item is IStorageFile file)
{
Task <FileSample> import = null;
ManagedDownload download = null;
Func <CancellationToken, IProgress <double>, Task <FileSample> > importGetter = async(cancel, progress) => {
import = ImportAsync(file, sync, progress, cancel);
FileSample sample = null;
try {
sample = await import;
if (download != null)
{
download.State = DownloadState.Completed;
}
} catch {
if (download != null)
{
download.State = DownloadState.LocalError;
}
}
return(sample);
};
download = downloads.QueueImport(file.Name, importGetter);
importTasks.Add(import);
}
}
total?.FinishDiscovery();
await Task.WhenAll(importTasks);
}
public void PreallocateNodes()
{
var progress = new Mock <IProgress <double> > ();
var aggregate = new AggregateProgress(progress.Object, holdForDiscovery: true);
aggregate.FinishDiscovery(10);
IProgress <double> node = aggregate.PopNode();
Assert.That(node, Is.Not.Null);
node.Report(1);
progress.Verify(p => p.Report(It.IsInRange(0.09, 0.11, Moq.Range.Inclusive)));
}
public async Task <IReadOnlyList <FileSample> > EnsureElementPresentAsync(EnvironmentElement element, IProgress <double> progress = null, CancellationToken cancellationToken = default)
{
if (element is null)
{
throw new ArgumentNullException(nameof(element));
}
await this.loadedServices.ConfigureAwait(false);
List <Task> tasks = new List <Task> ();
List <FileSample> samples = new List <FileSample> ();
AggregateProgress totalProgress = (progress != null) ? new AggregateProgress(progress) : null;
if (element.Audio != null)
{
foreach (string sampleId in element.Audio.Playlist.Descriptors)
{
FileSample sample = (await this.sync.GetElementByIdAsync(sampleId).ConfigureAwait(false) as FileSample);
if (sample == null)
{
continue;
}
IProgress <double> nodeProgress = totalProgress?.CreateProgressNode();
samples.Add(sample);
tasks.Add(this.downloadManager.EnsurePresentAsync(sample, nodeProgress, cancellationToken));
}
}
totalProgress?.FinishDiscovery();
int offset = 0;
for (int i = 0; i < tasks.Count; i++)
{
try {
await tasks[i].ConfigureAwait(false);
} catch {
samples.RemoveAt(i - offset++);
}
}
return(samples);
}