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This commit is contained in:
xiaoyuanda666-ship-it
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src/geo-weather.js
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262
src/geo-weather.js
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/**
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* geo-weather.js
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*
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* 启动时自动采集位置坐标 + 实时天气，落盘缓存，注入 system prompt。
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*
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* 数据分两层：
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* location — 坐标 + 地址详情，IP 未变时最长 7 天复用缓存
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* weather — 当前天气 + 今明两天，每次启动刷新
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*
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* 数据来源（全部免费，无需 API Key）：
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* ip-api.com → 公网 IP 反查坐标 / 城市 / 时区
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* nominatim (OSM) → 坐标反解详细地址（区级）
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* wttr.in → 天气（当前 + 今明两天）
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*
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* 对外接口：
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* collectGeoWeather() → 启动时调用一次，async
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* getGeoWeatherBlock() → 返回注入 prompt 的纯文本块，同步
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*/
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import fs from 'fs'
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import path from 'path'
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import { paths } from './paths.js'
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const GEO_WEATHER_FILE = path.join(paths.dataDir, 'geo-weather.json')
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const GEO_WEATHER_VERSION = 1
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const LOCATION_REFRESH_MS = 7 * 24 * 60 * 60 * 1000 // 位置信息兜底 7d 刷新一次
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let _cached = null
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// ─── 工具函数 ──────────────────────────────────────────────────────────────────
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function safe(fn, fallback = null) {
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try { return fn() } catch { return fallback }
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}
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async function fetchJSON(url, options = {}, timeoutMs = 8000) {
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try {
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const ctrl = new AbortController()
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const t = setTimeout(() => ctrl.abort(), timeoutMs)
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const res = await fetch(url, { signal: ctrl.signal, ...options })
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clearTimeout(t)
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if (!res.ok) return null
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return await res.json()
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} catch {
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return null
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}
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}
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// ─── 位置采集 ─────────────────────────────────────────────────────────────────
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async function fetchLocation() {
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// Step 1：IP 反查坐标（同时拿到城市 / 时区 / ISP）
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const ipData = await fetchJSON(
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'http://ip-api.com/json/?fields=status,query,city,regionName,country,countryCode,lat,lon,timezone,isp'
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)
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if (!ipData || ipData.status !== 'success') {
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console.warn('[geo-weather] ip-api.com 定位失败')
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return null
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}
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const { lat, lon, city, regionName, country, countryCode, timezone, isp, query: ip } = ipData
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// Step 2：Nominatim 反解精细地址（区 / 街道级）
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// User-Agent 是 Nominatim 免费使用协议要求
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const nominatim = await fetchJSON(
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'https://nominatim.openstreetmap.org/reverse?lat=' + lat + '&lon=' + lon + '&format=json&accept-language=zh',
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{ headers: { 'User-Agent': 'BaiLongma/2.0 (personal-assistant; contact: user@example.com)' } },
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10000
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)
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const addr = nominatim?.address || {}
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return {
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lat: Number(lat),
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lon: Number(lon),
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ip,
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isp: isp || null,
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city: addr.city || addr.town || addr.village || city,
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district: addr.suburb || addr.district || addr.county || null,
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region: addr.state || regionName,
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country: addr.country || country,
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country_code: (addr.country_code || countryCode || '').toUpperCase(),
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timezone: timezone || null,
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display_name: nominatim?.display_name || (city + ', ' + regionName + ', ' + country),
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collected_at: new Date().toISOString(),
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}
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}
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// ─── 天气采集 ─────────────────────────────────────────────────────────────────
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function parseWttrDay(day) {
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if (!day) return null
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// hourly 索引 4 ≈ 12:00，作为当天代表天气描述
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const noon = day.hourly?.[4]
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const condition = noon?.lang_zh?.[0]?.value || noon?.weatherDesc?.[0]?.value
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|| day.hourly?.[0]?.lang_zh?.[0]?.value || ''
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return {
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date: day.date || '',
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high: Number(day.maxtempC),
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low: Number(day.mintempC),
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condition,
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sunrise: day.astronomy?.[0]?.sunrise || '',
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sunset: day.astronomy?.[0]?.sunset || '',
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}
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}
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async function fetchWeather(lat, lon, city) {
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// 优先用坐标精确定位，坐标缺失时降级到城市名
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const query = (lat != null && lon != null)
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? (lat + ',' + lon)
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: encodeURIComponent(city || 'Beijing')
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const data = await fetchJSON(
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'https://wttr.in/' + query + '?format=j1&lang=zh',
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{},
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12000
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)
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if (!data) {
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console.warn('[geo-weather] wttr.in 天气获取失败')
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return null
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}
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const cur = data.current_condition?.[0]
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if (!cur) return null
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return {
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temp: Number(cur.temp_C),
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feels_like: Number(cur.FeelsLikeC),
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humidity: Number(cur.humidity),
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condition: cur.lang_zh?.[0]?.value || cur.weatherDesc?.[0]?.value || '',
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wind_kmh: Number(cur.windspeedKmph),
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wind_dir: cur.winddir16Point || '',
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uv_index: Number(cur.uvIndex),
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visibility: Number(cur.visibility),
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today: parseWttrDay(data.weather?.[0]),
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tomorrow: parseWttrDay(data.weather?.[1]),
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fetched_at: new Date().toISOString(),
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}
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}
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// ─── 核心：采集 + 落盘 ────────────────────────────────────────────────────────
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export async function collectGeoWeather() {
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// 读取已有缓存
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let stored = null
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if (fs.existsSync(GEO_WEATHER_FILE)) {
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stored = safe(() => JSON.parse(fs.readFileSync(GEO_WEATHER_FILE, 'utf8')))
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}
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let location = (stored?.version === GEO_WEATHER_VERSION) ? (stored.location || null) : null
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// 先轻量查一次当前公网 IP（复用 ip-api 调用，不做完整定位）
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const ipCheck = await fetchJSON(
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'http://ip-api.com/json/?fields=status,query',
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{},
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5000
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)
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const currentIP = (ipCheck?.status === 'success') ? ipCheck.query : null
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// 触发重查的两个条件：IP 变更（网络切换 / 出差），或缓存超过 7 天
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const cachedIP = location?.ip || null
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const locationAge = location?.collected_at
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? Date.now() - new Date(location.collected_at).getTime()
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: Infinity
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const ipChanged = currentIP && cachedIP && currentIP !== cachedIP
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const tooOld = locationAge > LOCATION_REFRESH_MS
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if (ipChanged || tooOld || !location) {
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const reason = !location ? '首次采集' : ipChanged ? ('IP 变更 ' + cachedIP + ' → ' + currentIP) : '缓存超 7 天'
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console.log('[geo-weather] 刷新位置信息（' + reason + ')...')
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const fresh = await fetchLocation()
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if (fresh) {
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location = fresh
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} else if (location) {
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console.warn('[geo-weather] 位置刷新失败，沿用缓存')
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}
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} else {
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console.log('[geo-weather] 位置缓存有效（IP 未变），跳过重新定位')
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}
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// 天气：每次启动都刷新
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let weather = null
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if (location) {
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console.log('[geo-weather] 获取天气数据...')
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weather = await fetchWeather(location.lat, location.lon, location.city)
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}
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const result = {
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version: GEO_WEATHER_VERSION,
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location: location || null,
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weather: weather || null,
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}
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safe(() => fs.writeFileSync(GEO_WEATHER_FILE, JSON.stringify(result, null, 2), 'utf8'))
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_cached = result
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const locLabel = location ? (location.city + ' (' + location.lat + ', ' + location.lon + ')') : '未知'
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const wxLabel = weather ? (weather.condition + ' ' + weather.temp + '°C') : '获取失败'
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console.log('[geo-weather] 完成 — 位置:', locLabel, '| 天气:', wxLabel)
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return result
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}
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// ─── 对外接口 ─────────────────────────────────────────────────────────────────
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/**
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* 返回注入 system prompt 的纯文本块。
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* 必须在 collectGeoWeather() 完成后调用。
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*/
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export function getGeoWeatherBlock() {
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if (!_cached) return ''
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const parts = []
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// —— 位置块 ——
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const loc = _cached.location
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if (loc) {
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const lines = ['## Location & Coordinates']
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lines.push('Coordinates: ' + loc.lat + ', ' + loc.lon)
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const place = [loc.district, loc.city, loc.region, loc.country].filter(Boolean).join(', ')
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if (place) lines.push('Address: ' + place)
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if (loc.country_code) lines.push('Country Code: ' + loc.country_code)
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if (loc.timezone) lines.push('Timezone: ' + loc.timezone)
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if (loc.ip) lines.push('Public IP: ' + loc.ip + (loc.isp ? ' · ' + loc.isp : ''))
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if (loc.display_name) lines.push('Full Address: ' + loc.display_name)
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parts.push(lines.join('\n'))
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}
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// —— 天气块 ——
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const w = _cached.weather
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if (w) {
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const lines = ['## Current Weather']
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lines.push(
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'Now: ' + w.condition +
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' · ' + w.temp + '°C (feels like ' + w.feels_like + '°C)' +
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' · Humidity ' + w.humidity + '%'
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)
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lines.push(
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'Wind: ' + w.wind_kmh + ' km/h ' + w.wind_dir +
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' · UV Index ' + w.uv_index +
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' · Visibility ' + w.visibility + ' km'
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)
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if (w.today) {
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let todayLine = 'Today (' + w.today.date + '): ' + w.today.condition +
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' · High ' + w.today.high + '°C / Low ' + w.today.low + '°C'
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if (w.today.sunrise) todayLine += ' · Sunrise ' + w.today.sunrise + ' / Sunset ' + w.today.sunset
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lines.push(todayLine)
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}
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if (w.tomorrow) {
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lines.push(
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'Tomorrow (' + w.tomorrow.date + '): ' + w.tomorrow.condition +
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' · High ' + w.tomorrow.high + '°C / Low ' + w.tomorrow.low + '°C'
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)
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}
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parts.push(lines.join('\n'))
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}
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return parts.join('\n\n')
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}
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