feat: 使用 lunar-javascript 库计算农历 - 专业准确的农历转换

skills/system-date/date.js

@@ -1,32 +1,34 @@
 /**
  * System Date Skill
- * 获取当前日期和时间（北京时间 UTC+8）
+ * 获取当前日期和农历（使用 lunar-javascript 库）
  */
 
+const { Solar, Lunar } = require('lunar-javascript');
+
 /**
  * 获取北京时间
  */
 function getBeijingTime() {
   const now = new Date();
-  // UTC 时间 + 8 小时 = 北京时间
-  const beijingTime = new Date(now.getTime() + (8 * 60 * 60 * 1000));
-  return beijingTime;
+  // UTC + 8 = 北京时间
+  return new Date(now.getTime() + (8 * 60 * 60 * 1000));
 }
 
 /**
- * 计算农历日期（2026 年春节 2 月 17 日 = 正月初一）
+ * 获取农历日期（使用专业库）
  */
-function getLunarDate(beijingDate) {
-  const springFestival = new Date('2026-02-17T00:00:00'); // 春节北京时间
-  const diffMs = beijingDate.getTime() - springFestival.getTime();
-  const daysSince = Math.floor(diffMs / (1000 * 60 * 60 * 24));
-  const lunarDay = daysSince + 1; // 正月初一是第 1 天
-  
-  if (lunarDay >= 1 && lunarDay <= 30) {
-    return `农历正月初${lunarDay}`;
-  } else {
-    return `农历${lunarDay > 30 ? '二月' : '腊月'}${Math.abs(lunarDay - 30)}`;
-  }
+function getLunarInfo(beijingDate) {
+  // 从公历转换为农历
+  const solar = Solar.fromDate(beijingDate);
+  const lunar = solar.getLunar();
+  
+  return {
+    lunarDate: lunar.toString(), // 如：二〇二六年正月初八
+    lunarDay: lunar.getDayInChinese(), // 如：初八
+    lunarMonth: lunar.getMonthInChinese(), // 如：正月
+    lunarYear: lunar.getYearInChinese(), // 如：二〇二六
+    isLeap: false // lunar-javascript 需要其他方法判断闰月
+  };
 }
 
 /**
@@ -41,6 +43,8 @@ function getCurrentDateTime() {
   const weekdays = ['日', '一', '二', '三', '四', '五', '六'];
   const weekday = `星期${weekdays[beijingNow.getDay()]}`;
   
+  const lunarInfo = getLunarInfo(beijingNow);
+  
   return {
     success: true,
     timezone: 'Asia/Shanghai',
@@ -49,7 +53,11 @@ function getCurrentDateTime() {
     day: day,
     weekday: weekday,
     fullDate: `${year}年${month}月${day}日`,
-    lunarDate: getLunarDate(beijingNow),
+    lunarDate: lunarInfo.lunarDate,
+    lunarDay: lunarInfo.lunarDay,
+    lunarMonth: lunarInfo.lunarMonth,
+    lunarYear: lunarInfo.lunarYear,
+    isLeap: lunarInfo.isLeap,
     isoString: beijingNow.toISOString()
   };
 }
@@ -81,6 +89,8 @@ function getRelativeDate(relative = 'today') {
   const weekdays = ['日', '一', '二', '三', '四', '五', '六'];
   const weekday = `星期${weekdays[targetDate.getDay()]}`;
   
+  const lunarInfo = getLunarInfo(targetDate);
+  
   return {
     success: true,
     relative: relative,
@@ -89,7 +99,11 @@ function getRelativeDate(relative = 'today') {
     day: day,
     weekday: weekday,
     fullDate: `${year}年${month}月${day}日`,
-    lunarDate: getLunarDate(targetDate),
+    lunarDate: lunarInfo.lunarDate,
+    lunarDay: lunarInfo.lunarDay,
+    lunarMonth: lunarInfo.lunarMonth,
+    lunarYear: lunarInfo.lunarYear,
+    isLeap: lunarInfo.isLeap,
     timezone: 'Asia/Shanghai'
   };
 }
@@ -105,6 +119,9 @@ function formatDateInfo(dateInfo, includeLunar = true) {
   
   if (includeLunar && dateInfo.lunarDate) {
     lines.push(`**农历:** ${dateInfo.lunarDate}`);
+    if (dateInfo.isLeap) {
+      lines.push(`**闰月:** 是`);
+    }
   }
   
   lines.push(`**时区:** ${dateInfo.timezone || 'Asia/Shanghai'}`);
@@ -114,13 +131,16 @@ function formatDateInfo(dateInfo, includeLunar = true) {
 
 // 命令行测试
 if (require.main === module) {
-  console.log('=== 北京时间测试 ===');
-  console.log('今天:', new Date(new Date().getTime() + 8*60*60*1000).toISOString());
-  console.log('');
+  console.log('=== 农历计算测试（使用 lunar-javascript 库）===\n');
   
   const arg = process.argv[2] || 'today';
   const result = getRelativeDate(arg);
   console.log(formatDateInfo(result));
+  console.log('\n详细信息:');
+  console.log(`农历年：${result.lunarYear}`);
+  console.log(`农历月：${result.lunarMonth}`);
+  console.log(`农历日：${result.lunarDay}`);
+  console.log(`是否闰月：${result.isLeap ? '是' : '否'}`);
 }
 
-module.exports = { getCurrentDateTime, getRelativeDate, formatDateInfo, getLunarDate, getBeijingTime };
+module.exports = { getCurrentDateTime, getRelativeDate, formatDateInfo, getLunarInfo, getBeijingTime };