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

namespace System
{
    /// <summary>
    /// 字符串转换扩展
    /// </summary>
    public static class SafeInputExtensions
    {
        /// <summary>
        /// 将字符串转换成Int类型，如果出错则返回0
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static short ToShort(this object str)
        {
            short result = 0;
            if (str != null)
            {
                short.TryParse(str.ToString(), out result);
            }
            return result;
        }

        /// <summary>
        /// 将字符串转换成Int类型，如果出错则返回0
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static int ToInt(this object str)
        {
            int result = 0;
            if (str != null)
            {
                int.TryParse(str.ToString(), out result);
            }
            return result;
        }

        /// <summary>
        /// 将字符串转换成decimal类型，如果出错则返回0
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static double ToDouble(this object str)
        {
            double result = 0.0;
            if (str != null)
            {
                double.TryParse(str.ToString(), out result);
            }
            return result;
        }

        public static decimal ToDecimal(this object str)
        {
            decimal result = 0m;
            if (str != null)
            {
                decimal.TryParse(str.ToString(), out result);
            }
            return result;
        }

        public static string ToNone(this object str, string extStr)
        {
            if (str != null && !string.IsNullOrEmpty(str.ToString()))
            {
                return str + " " + extStr;
            }
            return "";
        }

        /// <summary>
        /// 将字符串转换成真假
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static bool ToBool(this object str)
        {
            return str != null && str.ToString().Equals("true", StringComparison.CurrentCultureIgnoreCase);
        }

        /// <summary>
        /// 将字符串转换成GUID，出错则为Guid.NewGuid()
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static Guid ToGuid(this object str)
        {
            Guid result = Guid.NewGuid();
            if (str != null)
            {
                Guid.TryParse(str.ToString(), out result);
            }
            return result;
        }

        public static DateTime ToDateTime(this object str)
        {
            DateTime now = DateTime.Now;
            if (str != null)
            {
                DateTime.TryParse(str.ToString(), out now);
            }
            return now;
        }

        public static string ToDateTimeRandom()
        {
            return DateTime.Now.ToString("yyyyMMddHHmmss") + new Random().Next(9999).ToString();
        }

        public static string ToDateString()
        {
            return DateTime.Now.ToString("yyyyMMdd");
        }

        public static string ToBr(this string str)
        {
            if (!string.IsNullOrEmpty(str))
            {
                return str.Replace("\r\n", "<br>");
            }
            return str;
        }
    }
}