private async Task <IEnumerable <ImageViewModel> > MapListing(Listing listing, Dictionary <object, object> state)
{
if (listing.Data.After != null)
{
state["After"] = listing.Data.After;
}
var mappedImages = listing.Data.Children
.Where(thing => thing.Data is Link)
.Select(async(thing) => MapImage(await _imagesService.GetImagesFromUrl(((Link)thing.Data).Title, ((Link)thing.Data).Url)));
var result = new List <ImageViewModel>();
foreach (var mappedImage in mappedImages)
{
result.AddRange(await mappedImage);
}
return(result);
}