using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using TOOHUCardAPI.Data.Models;

namespace TOOHUCardAPI.DTO
{
    public static class CardEncodingUtil
    {
        public static string EncodeLevelList(this IEnumerable<CardLevel> cardLevels)
        {
            if (cardLevels == null)
            {
                return string.Empty;
            }
            return cardLevels.Select(cl => $"{cl.CardItemCode.Substring(6)}{cl.Level}").Aggregate(new StringBuilder(),
                (ret, current) =>
                {
                    ret.Append(string.IsNullOrWhiteSpace(ret.ToString()) ? current : $"#{current}");
                    return ret;
                }, builder => builder.ToString());
        }
    }
}