47 lines
1.3 KiB
JavaScript
47 lines
1.3 KiB
JavaScript
import { tool } from "langchain"
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import lunarLib from "lunar-javascript"
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const { Lunar } = lunarLib
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// 当年冬至在节气表中的 key 为英文（上一年冬至占用中文 key）
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const EN_TERM_NAMES = { DONG_ZHI: "冬至" }
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/**
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* 年份节气列表工具
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* 基于 lunar-javascript 计算给定年份的 24 节气精确日期
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*/
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export const getYearTermsTool = tool(
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async ({ year }) => {
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try {
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const table = Lunar.fromYmd(year, 1, 1).getJieQiTable()
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const terms = []
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for (const [key, solar] of Object.entries(table)) {
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// 只保留属于目标年份的节气（表首含上一年边界节气）
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if (solar.getYear() !== year) continue
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const name = EN_TERM_NAMES[key] ?? key
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terms.push({ date: solar.toString(), name })
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}
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terms.sort((a, b) => a.date.localeCompare(b.date))
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return JSON.stringify({ year, terms }, null, 2)
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} catch (error) {
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return JSON.stringify({ error: error.message }, null, 2)
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}
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},
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{
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name: "get_year_terms",
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description: "查询给定年份节气所在日期列表",
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schema: {
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type: "object",
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properties: {
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year: {
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type: "number",
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description: "年份",
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minimum: 1900,
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maximum: 2100
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}
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},
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required: ["year"]
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}
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}
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)
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