计算四班三运转（C-sharp2JavaScript）

origin-c-sharp.cs

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

namespace Common
{
    public static class GetShift
    {
        public static string Shift(string input_date)
        {
           int var_day_num;
           int var_num;
           string shift_no="甲";
           DateTime dtNightEnd = Convert.ToDateTime(input_date); //获取输入时间日期转成DateTime结构
            /*
             * DateTime struction:
             * 
             * 
             * */
           TimeSpan ts = dtNightEnd.Subtract(Convert.ToDateTime("1991-12-13"));
           var_day_num = ts.Days;  // 求与指定Date间隔的天数,该方法能精确到 millisecond
           var_num = var_day_num % 8;  // 天数对8取余
           DateTime ShortTime = Convert.ToDateTime(dtNightEnd.ToShortTimeString());  //获取输入DateTime的时间短格式 aka先转为短时间字符串：1:45 PM再转回DateTime结构
            //时间比较
           DateTime dt00 = Convert.ToDateTime("00:00:00");
           DateTime dt08 = Convert.ToDateTime("08:00:00");
           DateTime dt16 = Convert.ToDateTime("16:00:00");
           DateTime dt23 = Convert.ToDateTime("23:59:59");
           if (var_num == 0)
           {
               if (ShortTime >= dt00 || ShortTime < dt08)
               {
                   shift_no = "乙";
               }
               if (ShortTime >= dt08 || ShortTime < dt16)
               {
                   shift_no = "丙";
               }
               if (ShortTime >= dt16 || ShortTime < dt23)
               {
                   shift_no = "丁";
               }
           }
           if (var_num == 1)
           {
               if (ShortTime >= dt00 || ShortTime < dt08)
               {
                   shift_no = "甲";
               }
               if (ShortTime >= dt08 || ShortTime < dt16)
               {
                   shift_no = "丙";
               }
               if (ShortTime >= dt16 || ShortTime < dt23)
               {
                   shift_no = "丁";
               }
           }
           if (var_num == 2)
           {
               if (ShortTime >= dt00 || ShortTime < dt08)
               {
                   shift_no = "甲";
               }
               if (ShortTime >= dt08 || ShortTime < dt16)
               {
                   shift_no = "乙";
               }
               if (ShortTime >= dt16 || ShortTime < dt23)
               {
                   shift_no = "丙";
               }
           }
           if (var_num == 3)
           {
               if (ShortTime >= dt00 || ShortTime < dt08)
               {
                   shift_no = "丁";
               }
               if (ShortTime >= dt08 || ShortTime < dt16)
               {
                   shift_no = "乙";
               }
               if (ShortTime >= dt16 || ShortTime < dt23)
               {
                   shift_no = "丙";
               }
           }
           if (var_num == 4)
           {
               if (ShortTime >= dt00 || ShortTime < dt08)
               {
                   shift_no = "丁";
               }
               if (ShortTime >= dt08 || ShortTime < dt16)
               {
                   shift_no = "乙";
               }
               if (ShortTime >= dt16 || ShortTime < dt23)
               {
                   shift_no = "甲";
               }
           }
           if (var_num == 5)
           {
               if (ShortTime >= dt00 || ShortTime < dt08)
               {
                   shift_no = "丙";
               }
               if (ShortTime >= dt08 || ShortTime < dt16)
               {
                   shift_no = "甲";
               }
               if (ShortTime >= dt16 || ShortTime < dt23)
               {
                   shift_no = "乙";
               }
           }
           if (var_num == 6)
           {
               if (ShortTime >= dt00 || ShortTime < dt08)
               {
                   shift_no = "丙";
               }
               if (ShortTime >= dt08 || ShortTime < dt16)
               {
                   shift_no = "丁";
               }
               if (ShortTime >= dt16 || ShortTime < dt23)
               {
                   shift_no = "甲";
               }
           }
           if (var_num == 7)
           {
               if (ShortTime >= dt00 || ShortTime < dt08)
               {
                   shift_no = "乙";
               }
               if (ShortTime >= dt08 || ShortTime < dt16)
               {
                   shift_no = "丁";
               }
               if (ShortTime >= dt16 || ShortTime < dt23)
               {
                   shift_no = "甲";
               }
           }
          
           return shift_no;
        }
    }
}

sibansandaoC-sharp2JavaScript.js

// calc Date Diff
// input string format: 2014-12-12 08:00:00

// date pattern: (\d\d\d\d)[-./](1[0-2]|0?[1-9])[-./](0?[1-9]|[12][0-9]|3[01])
//               年 月 日 分隔符为 -./ 前缀0可有可无
// Time pattern: 00:00:00 - 23:59:59
//               (0?\d|1\d|2[0-3]):(0?\d|[1-5]\d):(0?\d|[1-5]\d)
//                24小时制 时分秒 前缀0可省略
// update1 : 连接字符串使用DateTime格式初始化Date对象，通过parse返回毫秒数进行比较，未测试
// update2 : 使用毫秒数进行比较，比较之前必须进行取整（使用的是向下取整）
//                日期正则也有问题，采用最简单的匹配形式了
function Main() { // using milliseconds to compare
	var strInput = "2012-12-12 08:00:00";
	var shiftNO = "";
	var pattDate = /(\d\d\d\d)[-./](\d\d)[-./](\d\d)/g;
	//var pattTime = /(\d\d):(\d\d):(\d\d)/g;
	var end = "1991-12-13 00:00:00";
	var startTime = new Date(strInput.replace(/-/g, "/")).getTime();
	var endTime = new Date(end.replace(/-/g, "/")).getTime();
	var dates = Math.floor(Math.abs(startTime - endTime) / (1000*60*60*24));  // 向下取整
	var intNum = dates % 8;
	var tmpDate = strInput.match(pattDate); // object
	var str00 = tmpDate[0] + " 00:00:00";   // tmpDate[0] is 'string'
	var str08 = tmpDate[0] + " 08:00:00";
	var str16 = tmpDate[0] + " 16:00:00";
	var str23 = tmpDate[0] + " 23:59:59";
	var dtInput = new Date(strInput.replace(/-/g, "/")).getTime();
	var dt00 = new Date(str00.replace(/-/g, "/")).getTime();
	var dt08 = new Date(str08.replace(/-/g, "/")).getTime();
	var dt16 = new Date(str16.replace(/-/g, "/")).getTime();
	var dt23 = new Date(str23.replace(/-/g, "/")).getTime();
	if (intNum === 0)
	{
		if ((dtInput >= dt00) || (dtInput < dt08))
		{
			shiftNO = "b";
		}
		if ((dtInput >= dt08) || (dtInput < dt16))
		{
			shiftNO = "c";
		}
		if ((dtInput >= dt16) || (dtInput < dt23))
		{
			shiftNO = "d";
		}
	}
	if (intNum == 1)
	{
		if ((dtInput >= dt00) || (dtInput < dt08))
		{
			 shiftNO = "a";
		}
		if ((dtInput >= dt08) || (dtInput < dt16))
		{
			 shiftNO = "c";
		}
		if ((dtInput >= dt16) || (dtInput < dt23))
		{
			 shiftNO = "d";
		}
	}
	if (intNum == 2)
	{
		if ((dtInput >= dt00) || (dtInput < dt08))
		{
			 shiftNO = "a";
		}
		if ((dtInput >= dt08) || (dtInput < dt16))
		{
			 shiftNO = "b";
		}
		if ((dtInput >= dt16) || (dtInput < dt23))
		{
			 shiftNO = "c";
		}
	}
	if (intNum == 3)
	{
		if ((dtInput >= dt00) || (dtInput < dt08))
		{
			 shiftNO = "d";
		}
		if ((dtInput >= dt08) || (dtInput < dt16))
		{
			 shiftNO = "b";
		}
		if ((dtInput >= dt16) || (dtInput < dt23))
		{
			 shiftNO = "c";
		}
	}
	if (intNum == 4)
	{
		if ((dtInput >= dt00) || (dtInput < dt08))
		{
			 shiftNO = "d";
		}
		if ((dtInput >= dt08) || (dtInput < dt16))
		{
			 shiftNO = "b";
		}
		if ((dtInput >= dt16) || (dtInput < dt23))
		{
			 shiftNO = "a";
		}
	}
	if (intNum == 5)
	{
		if ((dtInput >= dt00) || (dtInput < dt08))
		{
			 shiftNO = "c";
		}
		if ((dtInput >= dt08) || (dtInput < dt16))
		{
			 shiftNO = "a";
		}
		if ((dtInput >= dt16) || (dtInput < dt23))
		{
			 shiftNO = "b";
		}
	}
	if (intNum == 6)
	{
		if ((dtInput >= dt00) || (dtInput < dt08))
		{
			 shiftNO = "c";
		}
		if ((dtInput >= dt08) || (dtInput < dt16))
		{
			 shiftNO = "d";
		}
		if ((dtInput >= dt16) || (dtInput < dt23))
		{
			 shiftNO = "a";
		}
	}
	if (intNum == 7)
	{
		if ((dtInput >= dt00) || (dtInput < dt08))
		{
			 shiftNO = "b";
		}
		if ((dtInput >= dt08) || (dtInput < dt16))
		{
			 shiftNO = "d";
		}
		if ((dtInput >= dt16) || (dtInput < dt23))
		{
			 shiftNO = "a";
		}
	}
	// tested via statement below
	//document.getElementById("demo").innerHTML = shiftNO;
}

TODO:

• 连接字符串构成DateTime格式来初始化Date对象
• 简化if判断逻辑，switch（？）
• 尝试使用 momentjs