using System;
using System.Collections;
using System.Collections.Generic;

namespace Nirvana.Common.Extend
{
    public static class ExtList
    {
        /// <summary>
        /// 获取表里某页的数据
        /// </summary>
        /// <param name="data">表数据</param>
        /// <param name="pageIndex">当前页</param>
        /// <param name="pageSize">分页大小</param>
        /// <param name="allPage">返回总页数</param>
        /// <returns>返回当页表数据</returns>
        public static List<T> GetPage<T>(this List<T> data, int pageIndex, int pageSize, out int allPage)
        {
            allPage = 1;
            return null;
        }
        /// <summary>
        /// IList转成List<T>
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="list"></param>
        /// <returns></returns>
        public static List<T> IListToList<T>(IList list)
        {
            T[] array = new T[list.Count];
            list.CopyTo(array, 0);
            return new List<T>(array);
        }
        /// <summary>
        /// list去重
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="list"></param>
        /// <returns></returns>
        public static List<Guid> IDistinctList(this List<Guid> list)
        {
            if(list == null || list.Count == 0)
            {
                return new List<Guid>();
            }
            List<Guid> newlist = new List<Guid>();
            foreach(var item in list)
            {
                if(!newlist.Exists(x=>x == item))
                {
                    newlist.Add(item);
                }
            }
            return newlist;
        }

        public static List<string> IDistinctList(this List<string> list)
        {
            if (list == null || list.Count == 0)
            {
                return new List<string>();
            }
            List<string> newlist = new List<string>();
            foreach (var item in list)
            {
                if (!newlist.Exists(x => x== item))
                {
                    newlist.Add(item);
                }
            }
            return newlist;
        }
    }
}