/// <summary>
/// Checks if data source has a element after the passed as parameter
/// </summary>
/// <param name="current">Current element</param>
/// <returns>True, if there is a next element, false if there is not</returns>
public async Task <bool> HasNext(EntitiesBase.RssSearchResult current)
{
var data = await GetData();
if (current == null || !data.Any())
{
return(false);
}
return(data.IndexOf(current) < data.Count - 1);
}
/// <summary>
/// Retrieves the next element from source.
/// </summary>
/// <param name="current">Current element</param>
/// <returns>The next element from items, if it exists. Otherwise, returns null</returns>
public async Task <EntitiesBase.RssSearchResult> Next(EntitiesBase.RssSearchResult current)
{
var data = await GetData();
if (current == null || !data.Any())
{
return(null);
}
var index = data.IndexOf(current);
if (index == -1 || index == data.Count - 1)
{
return(null);
}
return(data[index + 1]);
}