using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Work.Extension;

public static class ConvertExtension
{
	#region 转换为string
	/// <summary>
	/// 将object转换为string，若转换失败，则返回string.Empty。不抛出异常。  
	/// </summary>
	/// <param name="obj"></param>
	/// <returns></returns>
	public static string ParseToStr(this object obj)
	{
		try
		{
			if (obj == null)
			{
				return string.Empty;
			}
			else
			{
				if (obj is DateTime dt)
					return dt.ToString("yyyy-MM-dd HH:mm:ss");
				return obj.ToString();
			}
		}
		catch
		{
			return string.Empty;
		}
	}

	public static string ParseToNullableStr(this object obj)
	{
		try
		{
			if (obj == null)
			{
				return null;
			}
			else
			{
				if (obj is DateTime dt)
					return dt.ToString("yyyy-MM-dd HH:mm:ss");
				return obj.ToString();
			}
		}
		catch
		{
			return null;
		}
	}

	public static string ParseToStrs<T>(this object obj, string split = ",")
	{
		try
		{
			var list = obj as IEnumerable<T>;
			if (list != null)
			{
				return string.Join(split, list);
			}
			else
			{
				return obj.ToString();
			}
		}
		catch
		{
			return string.Empty;
		}
	}
	#endregion
}