using System.Collections.ObjectModel;
using System.Runtime.InteropServices.WindowsRuntime;
using System.Threading.Tasks;
using Windows.Foundation;
using Windows.UI.Xaml.Data;

namespace FoxTube.Models.Collections
{
	public abstract class ViewCollection<T> : ObservableCollection<T>, ISupportIncrementalLoading
	{
		public int ItemsPerRequest { get; set; }
		public bool HasMoreItems { get; protected set; } = true;

		public IAsyncOperation<LoadMoreItemsResult> LoadMoreItemsAsync(uint count) =>
			AsyncInfo.Run((c) => LoadItems());

		public abstract Task<LoadMoreItemsResult> LoadItems();
	}
}