public async Task <List <RssItem> > GetAllItemsAsync(int?limit = null)
{
List <RssItem> items = new List <RssItem>();
var tasks = new List <Task <List <RssItem> > >();
foreach (var feed in await _feedRepository.GetFeedsAsync())
{
var task = GetRssItemsAsync(feed, limit);
tasks.Add(task);
}
await Task.WhenAll(tasks);
foreach (var task in tasks)
{
items.AddRange(task.Result);
}
return(items
.Where(i => i.PublicationDate >= DateTime.Now.AddDays(-1))
.OrderByDescending(i => i.PublicationDate)
.Distinct()
.ToList());
}