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LunarDateUtils.mc
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LunarDateUtils.mc
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//算法来自 https://github.com/CutePandaSh/zhdate/blob/master/zhdate/__init__.py
using Toybox.System;
using Toybox.Time.Gregorian;
class LunarDateUtils{
/**
* 从2021年到2100年的农历月份数据代码 20位二进制代码表示一个年份的数据，
* 前四位0:表示闰月为29天，1:表示闰月为30天
* 中间12位：从左起表示1-12月每月的大小，1为30天，0为29天
* 最后四位：表示闰月的月份，0表示当年无闰月
* 前四位和最后四位应该结合使用，如果最后四位为0，则不考虑前四位
* 例：
* 1901年代码为 19168，转成二进制为 0b100101011100000, 最后四位为0，当年无闰月，月份数据为 010010101110 分别代表12月的大小情况
* 1903年代码为 21717，转成二进制为 0b0000101010011010101，最后四位为5，当年为闰五月，首四位为0，闰月为29天， 月份数据为 010101001101，分别代表12月的大小情况
*
*/
var CHINESE_YEAR_CODE = [
27296, 44368, 23378, 19296, 42726, 42208, 53856, 60005,
54576, 23200, 30371, 38608, 19195, 19152, 42192, 118966,
53840, 54560, 56645, 46496, 22224, 21938, 18864, 42359,
42160, 43600, 111189, 27936, 44448, 84835, 37744, 18936,
18800, 25776, 92326, 59984, 27296, 108228, 43744, 37600,
53987, 51552, 54615, 54432, 55888, 23893, 22176, 42704,
21972, 21200, 43448, 43344, 46240, 46758, 44368, 21920,
43940, 42416, 21168, 45683, 26928, 29495, 27296, 44368,
84821, 19296, 42352, 21732, 53600, 59752, 54560, 55968,
92838, 22224, 19168, 43476, 41680, 53584, 62034, 54560
];
//从2021年，至2100年每年的农历春节的公历日期
var CHINESE_NEW_YEAR_DATE = [
20210212, 20220201, 20230122, 20240210, 20250129,
20260217, 20270206, 20280126, 20290213, 20300203,
20310123, 20320211, 20330131, 20340219, 20350208,
20360128, 20370215, 20380204, 20390124, 20400212,
20410201, 20420122, 20430210, 20440130, 20450217,
20460206, 20470126, 20480214, 20490202, 20500123,
20510211, 20520201, 20530219, 20540208, 20550128,
20560215, 20570204, 20580124, 20590212, 20600202,
20610121, 20620209, 20630129, 20640217, 20650205,
20660126, 20670214, 20680203, 20690123, 20700211,
20710131, 20720219, 20730207, 20740127, 20750215,
20760205, 20770124, 20780212, 20790202, 20800122,
20810209, 20820129, 20830217, 20840206, 20850126,
20860214, 20870203, 20880124, 20890210, 20900130,
20910218, 20920207, 20930127, 20940215, 20950205,
20960125, 20970212, 20980201, 20990121, 21000209
];
function initialize(){
}
/**
* 获取公历对应的农历日期
*/
public function getLunarDate(year,month,day){
var lunarYear;
var lunarMonth;
var lunarDay = 0;
var leapMonth;
lunarYear = year;
/*处理公历初的农历问题 2022 1 19*/
var newYearDateY = CHINESE_NEW_YEAR_DATE[year - 2021]/10000;
var newYearDateM = CHINESE_NEW_YEAR_DATE[year - 2021]/100%100;
var newYearDateD = CHINESE_NEW_YEAR_DATE[year - 2021]%100;
// System.println("newYearDateY:"+newYearDateY);
// System.println("newYearDateM:"+newYearDateM);
// System.println("newYearDateD:"+newYearDateD);
if(newYearDateY > year
|| (newYearDateY == year && newYearDateM > month)
|| (newYearDateY == year && newYearDateM == month && newYearDateD > day)){
lunarYear--;
}
// System.println("lunarYear:"+lunarYear);
var todayMoment = Gregorian.moment({
:year => year,
:month => month,
:day => day,
:hour => 0,
:minute => 0
});
newYearDateY = CHINESE_NEW_YEAR_DATE[lunarYear - 2021]/10000;
newYearDateM = CHINESE_NEW_YEAR_DATE[lunarYear - 2021]/100%100;
newYearDateD = CHINESE_NEW_YEAR_DATE[lunarYear - 2021]%100;
var newYearDateMoment = Gregorian.moment({
:year => newYearDateY,
:month => newYearDateM,
:day => newYearDateD,
:hour => 0,
:minute => 0
});
var durationPassed = todayMoment.subtract(newYearDateMoment);
var daysPassed = durationPassed.value()/86400;
// System.println("daysPassed:"+daysPassed);
var yearCode = CHINESE_YEAR_CODE[lunarYear - 2021];
var monthDays = decode(yearCode);
var size = monthDays.size();
var acc = accumulate(monthDays);
var monthTemp = 0;
for(var i = 0;i < size;i++){
if (daysPassed + 1 <= acc[i]){
monthTemp = i + 1;//?
// System.println("monthTemp:"+monthTemp);
// System.println("monthDays[i]:"+monthDays[i]);
// System.println("acc[i]:"+acc[i]);
// System.println("daysPassed:"+daysPassed);
lunarDay = monthDays[i] - (acc[i] - daysPassed) + 1;
// System.println("lunarDay:"+lunarDay);
break;
}
}
leapMonth = false;
if ((yearCode & 0xf) == 0 || monthTemp <= (yearCode & 0xf)){
lunarMonth = monthTemp;
}else{
lunarMonth = monthTemp - 1;
}
if ((yearCode & 0xf) != 0 && monthTemp == (yearCode & 0xf) + 1){
leapMonth = true;
}
// System.println("day:"+lunarDay);
return formatCHNDate(lunarYear, lunarMonth, lunarDay, leapMonth);
}
function formatCHNDate(lunarYear, lunarMonth, lunarDay, leapMonth){
var ZHNUMS = ["零","一","二","三","四","五","六","七","八","九","十"];
// zh_year = ''
// for i in range(0, 4):
// zh_year += ZHNUMS[int(str(lunarYear)[i])]
// zh_year += '年'
var zhMonth = leapMonth?"闰":"";
if(lunarMonth == 1){
zhMonth += "正";
}else if(lunarMonth == 12){
zhMonth += "腊";
}else if(lunarMonth <= 10){
zhMonth += ZHNUMS[lunarMonth];
}else{
zhMonth += "十"+ZHNUMS[lunarMonth - 10];
}
zhMonth += "月";
var zhDay="";
if(lunarDay <= 10){
zhDay = "初" + ZHNUMS[lunarDay];
}else if(lunarDay < 20){
zhDay = "十" + ZHNUMS[lunarDay - 10];
}else if(lunarDay == 20){
zhDay = "二十";
}else if(lunarDay < 30){
zhDay = "廿" + ZHNUMS[lunarDay - 20];
}else{
zhDay = "三十";
}
return zhMonth + zhDay;
// year_tiandi = ZhDate.__tiandi(self.lunar_year - 1900 + 36) + '年
// shengxiao = "鼠牛虎兔龙蛇马羊猴鸡狗猪"
// return f"{zh_year}{zh_month}{zh_day} {year_tiandi} ({shengxiao[(self.lunar_year - 1900) % 12]}年)"
}
/**
* yearCode 从年度代码数组中获取的代码,已经转换成整数
* 获取当前年度代码解析以后形成的每月天数数组，已将闰月嵌入对应位置，即有闰月的年份返回长度为13，否则为12
* 0b0000101010011010101
10110110101 0010
**/
public function decode(yearCode){
var monthDays;
//闰月的情况
var runYue = yearCode & 0xf;
if(runYue > 0){
monthDays = [0,0,0,0,0,0, 0,0,0,0,0,0, 0];
if ((yearCode >> 16) != 0){
monthDays[runYue] = 30;
}else{
monthDays[runYue] = 29;
}
for(var i = 5;i < 17;i++){
if((yearCode >> (i - 1)) & 1 == 1){
//比如闰三月，下标 0 1 2 都正常计算，然后跳过3 继续计算4以后
if(17 - i > runYue){
monthDays[17 - i] = 30;
}else{
monthDays[16 - i] = 30;
}
}else{
if(17 - i > runYue){
monthDays[17 - i] = 29;
}else{
monthDays[16 - i] = 29;
}
}
}
}else{
monthDays = [0,0,0,0,0,0, 0,0,0,0,0,0];
for(var i = 5;i < 17;i++){
if((yearCode >> (i - 1)) & 1 == 1){
monthDays[17 - i - 1] = 30;
}else{
monthDays[17 - i - 1] = 29;
}
}
}
// System.println("有无闰月："+runYue);
// System.println("monthDays: "+monthDays);
return monthDays;
}
function accumulate(monthDays){
var days = 0;
var size = monthDays.size();
var acc = new [size];
for(var i = 0;i < size;i++){
days += monthDays[i];
acc[i] = days;
}
// System.println(acc);
return acc;
}
(:test)
public function testLunarDate20210627(logger){
var dateUtils = new LunarDateUtils();
var date = dateUtils.getLunarDate(2021,6,27);
System.print(date);
return date.equals("五月十八");
}
(:test)
public function testLunarDate20210212(logger){
var dateUtils = new LunarDateUtils();
var date = dateUtils.getLunarDate(2021,2,12);
System.print(date);
return date.equals("正月初一");
}
(:test)
public function testLunarDate20220211(logger){
var dateUtils = new LunarDateUtils();
var date = dateUtils.getLunarDate(2022,2,11);
System.print(date);
return date.equals("正月十一");
}
(:test)
public function testLunarDate20210213(logger){
var dateUtils = new LunarDateUtils();
var date = dateUtils.getLunarDate(2021,2,13);
System.println(date);
return date.equals("正月初二");
}
(:test)
public function testLunarDate20230322(logger){
var dateUtils = new LunarDateUtils();
var date = dateUtils.getLunarDate(2023,3,22);
System.println(date);
return date.equals("闰二月初一");
}
(:test)
public function testLunarDate20230321(logger){
var dateUtils = new LunarDateUtils();
var date = dateUtils.getLunarDate(2023,3,21);
System.println(date);
return date.equals("二月三十");
}
(:test)
public function testLunarDate20210426(logger){
var dateUtils = new LunarDateUtils();
var date = dateUtils.getLunarDate(2021,4,26);
System.println(date);
return date.equals("三月十五");
}
(:test)
public function testLunarDate20230121(logger){
var dateUtils = new LunarDateUtils();
var date = dateUtils.getLunarDate(2023,1,21);
System.println(date);
return date.equals("腊月三十");
}
}