protected override async Task DownloadAsync(
IList <ImageEntry> entries,
Action <double>?onProgress = null,
CancellationToken cancellationToken = default)
{
string filename = $"{Illust.Id}.gif";
var details = await Illust.GetAnimatedDetailAsync(cancellationToken).ConfigureAwait(false);
var(relative, absolute) = WithDirectory(filename);
using var fs = File.Create(absolute, 8192, FileOptions.Asynchronous);
using var mms = new MemoryStream();
using (var response = await details.GetZipAsync(cancellationToken).ConfigureAwait(false))
await ReadAsync(response, mms, onProgress, cancellationToken).ConfigureAwait(false);
mms.Seek(0, SeekOrigin.Begin);
using (var zipArchive = new ZipArchive(mms))
await GifHelper.ComposeGifAsync(zipArchive,
details.Frames.Select(x => (x.File, x.Delay)),
fs,
cancellationToken)
.ConfigureAwait(false);
await fs.FlushAsync(cancellationToken).ConfigureAwait(false);
entries.Add(new(ImageType.Animated, relative)
{
PostOrderId = 0
});
