Libation/Source/LibationUiBase/GridView/SeriesOrder.cs

using DataLayer;
using System;
using System.Collections.Generic;
using System.Linq;

namespace LibationUiBase.GridView
{
	public class SeriesOrder : IComparable
	{
		private float[] Orders { get; }
		public string OrderString { get; }

		public SeriesOrder(IEnumerable<SeriesBook> seriesBooks)
		{
			var orderstrings = seriesBooks
				.Where(s => s.Index > 0)
				.Select(s => s.Order == "-1" ? "-" : $"#{s.Order}")
				.ToList();
			OrderString = string.Join(", ", orderstrings);

			Orders = seriesBooks.Where(s => s.Index > 0).Select(s => s.Index).ToArray();
		}
		public override string ToString() => OrderString;

		public int CompareTo(object? obj)
		{
			if (obj is not SeriesOrder other) return 1;

			int count = int.Min(Orders.Length, other.Orders.Length);
			for (int i = 0; i < count; i++)
			{
				var compare = Orders[i].CompareTo(other.Orders[i]);
				if (compare != 0) return compare;
			}

			if (Orders.Length < other.Orders.Length) return 1;
			if (Orders.Length > other.Orders.Length) return -1;
			return 0;
		}

		public static int Compare(SeriesOrder? a, SeriesOrder? b)
		{
			if (a is null && b is null) return 0;
			else if (a is null) return 1;
			else if (b is null) return -1;
			else return a.CompareTo(b);
		}
	}
}