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

namespace Common.TextUtil
{
    public static class SimpleTypeExtensions
    {
        /// <summary>
        /// 验证字符串是否是Null或者空字符串
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static bool IsEmptyOrNull(this string str)
        {
            if (str == null)
            {
                return true;
            }
            else if (str == "")
            {
                return true;
            }
            return false;
        }

        /// <summary>
        /// 转换字符串到32位整形
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static int ToInt32(this string str)
        {
            int rs = 0;
            if (int.TryParse(str, out rs))
            {
                return rs;
            }
            throw new Exceptions.CannotConvertException(str);
        }

        /// <summary>
        /// 转换字符串到64位整形
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static long ToInt64(this string str)
        {
            long rs = 0;
            if (long.TryParse(str, out rs))
            {
                return rs;
            }
            throw new Exceptions.CannotConvertException(str);
        }

        /// <summary>
        /// 转换字符串到16位整形
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static short ToInt16(this string str)
        {
            short rs = 0;
            if (short.TryParse(str, out rs))
            {
                return rs;
            }
            throw new Exceptions.CannotConvertException(str);
        }

        /// <summary>
        /// 转换字符串到浮点型
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static decimal ToDecimal(this string str)
        {
            decimal rs = 0;
            if (decimal.TryParse(str, out rs))
            {
                return rs;
            }
            throw new Exceptions.CannotConvertException(str);
        }

        /// <summary>
        /// 转换字符串到单精度浮点型
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static Single ToSingle(this string str)
        {
            Single rs = 0;
            if (Single.TryParse(str, out rs))
            {
                return rs;
            }
            throw new Exceptions.CannotConvertException(str);
        }

        /// <summary>
        /// 转换字符串到双精度浮点型
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static double ToDouble(this string str)
        {
            double rs = 0;
            if (double.TryParse(str, out rs))
            {
                return rs;
            }
            throw new Exceptions.CannotConvertException(str);
        }

        /// <summary>
        /// 转换字符串到布尔值，只支持0;1或者True;False，不区分大小写
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static bool ToBool(this string str)
        {
            if (str == "0" || str.ToUpper() == "FALSE")
            {
                return false;
            }
            else if (str == "1" || str.ToUpper() == "TRUE")
            {
                return true;
            }
            else
            {
                throw new Exceptions.CannotConvertException(str);
            }
        }

        /// <summary>
        /// 获取字符串值，如果为空则返回空字符串,过滤%和'
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static string GetValue(this string str)
        {
            if (str == null)
            {
                return "";
            }
            return str.Replace("'", "‘").Replace("%", "％");
        }
    }
}