/// <summary>
/// Gets IDs of top stories
/// </summary>
/// <param name="count">Defines how many IDs from the top will be returned</param>
/// <returns>List of objects containing story ID and its rank</returns>
public async Task <List <RankedStoryId> > GetTopStoryIds(int count)
{
var allIds = await dataFetcher.GetTopStoryIds();
return(allIds
.Take(Math.Min(count, allIds.Length))
.Select((id, index) => new RankedStoryId {
StoryId = id, Rank = index + 1
})
.ToList());
}