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轻量级紫微斗数星盘生成库。可以通过出生年月日获取到紫微斗数星盘信息、生肖、星座等信息。This is a lightweight kit for generating astrolabes for Zi Wei Dou Shu (The Purple Star Astrology), an ancient Chinese astrology. It allows you to obtain your horoscope and personality analysis.
175 lines (174 loc) • 6.81 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.lunar2solar = exports.solar2lunar = exports.normalizeSolarDateStr = exports.normalizeLunarDateStr = void 0;
var dayjs_1 = __importDefault(require("dayjs"));
var days_1 = require("./days");
var leap_1 = require("./leap");
var misc_1 = require("./misc");
/**
* 将农历日期字符串拆分成年，月，日
*
* @param dateStr 农历日期字符串 YYYY-MM-DD
* @returns [年, 月, 日]
* @example
* normalizeLunarDateStr('2023-07-31'); // [2023, 7, 31]
*/
var normalizeLunarDateStr = function (dateStr) { return dateStr.split('-').map(function (item) { return +item.trim(); }); };
exports.normalizeLunarDateStr = normalizeLunarDateStr;
/**
* 将公历日期字符串拆分成年，月，日
*
* @param dateStr 公历日期
* @returns [年, 月, 日]
* @example
* normalizeSolarDateStr('2023-07-31'); // [2023, 7, 31]
*/
var normalizeSolarDateStr = function (dateStr) {
var date = (0, dayjs_1.default)(dateStr);
if (!date.isValid()) {
throw new Error('invalid date.');
}
return [date.year(), date.month() + 1, date.date()];
};
exports.normalizeSolarDateStr = normalizeSolarDateStr;
/**
* 公历转农历，年份需要在【1900~2100】之间，并且日期必须在1900-1-31之后
*
* @param dateStr 公历日期 YYYY-MM-DD格式的字符串或者Date对象
* @returns LunarDate
*/
var solar2lunar = function (dateStr) {
var _a = (0, exports.normalizeSolarDateStr)(dateStr), year = _a[0], month = _a[1], day = _a[2];
// 参数区间1900.1.31~2100.12.31
// 年份限定、上限
if (year < 1900 || year > 2100) {
throw new Error('year should be between 1900 and 2100.');
}
// 公历传参最下限 1900-01-31
if (year === 1900 && month === 1 && day < 31) {
throw new Error('date must be after 1900-1-31.');
}
var utcDate = Date.UTC(year, month - 1, day); // 获取当前日期UTC值
var utcFloor = Date.UTC(1900, 0, 31); // 获取1900-1-31日的UTC值
var lunarYear; // 农历年份
var totalDayOfYear = 0;
var offset = (utcDate - utcFloor) / 86400000; // 将差值转化为天
for (lunarYear = 1900; lunarYear < 2101 && offset > 0; lunarYear++) {
// 从1900年往2100年循环，将offset减去每一年的天数，当offset小于等于0的时候
// 结束循环，当前的索引即是农历年份
totalDayOfYear = (0, days_1.getTotalDaysOfLunarYear)(lunarYear);
offset -= totalDayOfYear;
}
if (offset < 0) {
// 当offset小于0了，需要将农历年份减去1
offset += totalDayOfYear;
lunarYear--;
}
var leapMonth = (0, leap_1.getLeapMonth)(lunarYear); // 获取农历年闰月，如果该年没有闰月返回0
var totalDayOfMonth = 0;
var lunarMonth; // 农历月份
var leapFixed = false;
for (lunarMonth = 1; lunarMonth < 13 && offset > 0; lunarMonth++) {
if (leapMonth > 0 && lunarMonth === leapMonth + 1 && leapFixed === false) {
// 闰月
--lunarMonth;
leapFixed = true;
totalDayOfMonth = (0, leap_1.getLeapDays)(lunarYear); // 计算农历闰月天数
}
else {
// 非闰月
totalDayOfMonth = (0, days_1.getTotalDaysOfLunarMonth)(lunarYear, lunarMonth); // 计算农历普通月天数
}
// 解除闰月;
if (leapFixed && lunarMonth === leapMonth + 1) {
leapFixed = false;
}
offset -= totalDayOfMonth;
}
// 修复闰月导致数组下标重叠
if (offset === 0 && leapMonth > 0 && lunarMonth === leapMonth + 1) {
if (leapFixed) {
leapFixed = false;
}
else {
leapFixed = true;
--lunarMonth;
}
}
if (offset < 0) {
offset += totalDayOfMonth;
--lunarMonth;
}
var lunarDay = offset + 1;
return {
lunarYear: lunarYear,
lunarMonth: lunarMonth,
lunarDay: lunarDay,
isLeap: leapFixed,
toString: function (toCnStr) {
if (toCnStr) {
return (0, misc_1.lunarDateToStr)("".concat(lunarYear, "-").concat(lunarMonth, "-").concat(lunarDay), leapFixed);
}
return "".concat(lunarYear, "-").concat(lunarMonth, "-").concat(lunarDay);
},
};
};
exports.solar2lunar = solar2lunar;
/**
*
* @param dateStr 农历日期 YYYY-MM-DD
* @param isLeapMonth 是否闰月，若该月不是闰月，会忽略该参数
* @returns SolarDate
*/
var lunar2solar = function (dateStr, isLeapMonth) {
var _a = (0, exports.normalizeLunarDateStr)(dateStr), year = _a[0], month = _a[1], day = _a[2];
var leapMonth = (0, leap_1.getLeapMonth)(year);
if (isLeapMonth && leapMonth !== month) {
// 该月不是闰月但传入了闰月标志，则讲标志设为false
isLeapMonth = false;
}
var totalLeapDays = (0, leap_1.getLeapDays)(year);
var totalDaysOfTheMonth = (0, days_1.getTotalDaysOfLunarMonth)(year, month);
// 获取当月总天数
var totalDays = isLeapMonth ? totalLeapDays : totalDaysOfTheMonth;
if (year < 1900 || year > 2100 || day > totalDays) {
// 日期不合法
throw new Error('invalid date.');
}
// 农历日期时间偏移量
var offset = 0;
// 将今年以前的年份时间偏移量加入offset
for (var i = 1900; i < year; i++) {
offset += (0, days_1.getTotalDaysOfLunarYear)(i);
}
if (leapMonth < month && leapMonth > 0) {
// 若该月前面有闰月，则需要将闰月天数加入偏移量
offset += totalLeapDays;
}
// 将今年的当月以前的时间偏移量加入offset
for (var i = 1; i < month; i++) {
offset += (0, days_1.getTotalDaysOfLunarMonth)(year, i);
}
// 转换闰月农历 需补充该年闰月的前一个月的时差
if (isLeapMonth) {
offset += totalDaysOfTheMonth;
}
// 1900年农历正月一日的公历时间为1900年1月30日0时0分0秒(该时间也是本农历的最开始起始点)
var stmap = Date.UTC(1900, 1, 30, 0, 0, 0);
var solarDate = new Date((offset + day - 31) * 86400000 + stmap);
var solarYear = solarDate.getUTCFullYear();
var solarMonth = solarDate.getUTCMonth() + 1;
var solarDay = solarDate.getUTCDate();
return {
solarYear: solarYear,
solarMonth: solarMonth,
solarDay: solarDay,
toString: function () {
return "".concat(solarYear, "-").concat(solarMonth, "-").concat(solarDay);
},
};
};
exports.lunar2solar = lunar2solar;