private static IObservable <Preview> LoadPreview(IPreviewLoader previewLoader, ReplyModel model)
{
if (model.PhotoData != null)
{
return(previewLoader.LoadPreview(model.PhotoData, PreviewQuality.Low));
}
if (model.VideoData?.Thumbnail != null)
{
return(previewLoader.LoadPreview(model.VideoData.Thumbnail));
}
if (model.StickerData?.Thumbnail != null)
{
return(previewLoader.LoadPreview(model.StickerData.Thumbnail));
}
return(Observable.Empty <Preview>());
}