feat: 初始提交（仅核心代码，已排除大文件）

src/server/market_skills/sp500/index.js

@@ -0,0 +1,156 @@
+const iconv = require('iconv-lite')
+const { fetchYahoo } = require('../../marketsClient')
+
+// State to prevent alert spam
+// Map<alertKey, lastAlertTimestamp>
+const lastAlertTimes = new Map()
+
+const parseTencentLine = (line) => {
+  const m = line.match(/^v_(\w+)="([^"]*)/)
+  if (!m) return null
+  const symbol = m[1]
+  const body = m[2]
+  let parts = body.split('~')
+  if (parts.length < 3 && body.includes(',')) {
+    parts = body.split(',')
+  }
+  
+  // Standard Tencent Format (verified for sh/sz/bj/us/hk):
+  // 1: Name
+  // 3: Current Price
+  // 4: Prev Close
+  
+  let name = parts[1]
+  let price = parseFloat(parts[3])
+  let prevClose = parseFloat(parts[4])
+  
+  if (isNaN(price) || isNaN(prevClose)) return null
+  
+  const change = price - prevClose
+  const pct = prevClose ? (change / prevClose) * 100 : 0
+    let captured_at = parts[30] || ''
+    if (captured_at.length === 14 && !captured_at.includes('-')) {
+      captured_at = captured_at.replace(/^(\d{4})(\d{2})(\d{2})(\d{2})(\d{2})(\d{2})$/, '$1-$2-$3 $4:$5:$6')
+    }
+  
+  return { symbol, name, price, prevClose, change, change_percent: pct, captured_at }
+}
+
+const fetchTencent = async (axios, symbols) => {
+  if (!symbols || symbols.length === 0) return []
+  const url = `http://qt.gtimg.cn/q=${symbols.join(',')}`
+  try {
+    const res = await axios.get(url, { responseType: 'arraybuffer', timeout: 10000, validateStatus: () => true })
+    if (!res || res.status >= 400) return []
+    const text = iconv.decode(Buffer.from(res.data), 'gb18030')
+    const lines = String(text || '').split(/;\s*/).filter(Boolean)
+    const out = []
+    for (const line of lines) {
+      const r = parseTencentLine(line)
+      if (r) out.push({ ...r, source: 'tencent' })
+    }
+    return out
+  } catch (e) {
+    return []
+  }
+}
+
+const checkAlerts = (data, config) => {
+  const alerts = []
+  
+  // Helper to add alert with slot-based cooldown (AM/PM logic)
+  const addAlert = (key, title, message, level = 'warning') => {
+    // Get current Beijing time
+    const d = new Date()
+    const utc = d.getTime() + (d.getTimezoneOffset() * 60000)
+    const bjDate = new Date(utc + (3600000 * 8))
+    
+    const year = bjDate.getFullYear()
+    const month = String(bjDate.getMonth() + 1).padStart(2, '0')
+    const day = String(bjDate.getDate()).padStart(2, '0')
+    const hour = bjDate.getHours()
+    
+    let slot = ''
+    if (hour >= 0 && hour < 12) slot = 'am'
+    else slot = 'pm' // 12:00 - 23:59
+    
+    const currentSlotKey = `${year}-${month}-${day}-${slot}`
+    const lastSlotKey = lastAlertTimes.get(key)
+    
+    // Only alert if we haven't alerted in this slot for this specific key
+    if (lastSlotKey !== currentSlotKey) {
+      alerts.push({ id: key, title, message, level })
+      lastAlertTimes.set(key, currentSlotKey)
+    }
+  }
+
+  // 1. Drop Alerts (Integer steps: 2%, 3%, 4%...)
+  if (config.alerts.change_percent_down && data.change_percent <= config.alerts.change_percent_down) {
+    // Check integer steps
+    const currentDrop = Math.floor(Math.abs(data.change_percent))
+    const key = `drop_${currentDrop}`
+    if (currentDrop >= Math.abs(config.alerts.change_percent_down)) {
+       addAlert(key, `${config.name}跌幅预警`, `当前跌幅 ${data.change_percent.toFixed(2)}% (>= ${currentDrop}%)`)
+    }
+  }
+
+  // 2. Rise Alerts (Integer steps: 2%, 3%, 4%...)
+  if (config.alerts.change_percent_up && data.change_percent >= config.alerts.change_percent_up) {
+    const currentRise = Math.floor(data.change_percent)
+    const key = `rise_${currentRise}`
+    if (currentRise >= config.alerts.change_percent_up) {
+      addAlert(key, `${config.name}涨幅预警`, `当前涨幅 ${data.change_percent.toFixed(2)}% (>= ${currentRise}%)`)
+    }
+  }
+
+  return alerts
+}
+
+module.exports = {
+  run: async (context, config) => {
+    const { axios, logJSON } = context
+    let item = null
+    if (String(config.source || '').toLowerCase() === 'yahoo_probe') {
+      const quotes = await fetchYahoo([config.symbol])
+      item = quotes.find(q => q.symbol === config.symbol)
+    } else {
+      const quotes = await fetchTencent(axios, [config.symbol])
+      item = quotes.find(q => q.symbol === config.symbol)
+    }
+
+    // Fallback: try Tencent if Yahoo failed, or vice versa
+    if (!item) {
+      if (String(config.source || '').toLowerCase() === 'yahoo_probe') {
+        const fb = await fetchTencent(axios, [config.symbol])
+        item = fb.find(q => q.symbol === config.symbol)
+      } else {
+        const fb = await fetchYahoo([config.symbol])
+        item = fb.find(q => q.symbol === config.symbol)
+      }
+    }
+
+    if (!item) {
+      logJSON('skill.fetch.error', { skill: config.name, message: 'Data not found' }, 'market_skills')
+      return null
+    }
+
+    // Prepare data for DB
+    const data = [{
+      label: config.name,
+      symbol: config.symbol,
+      source: config.source,
+      name: item.name,
+      price: item.price,
+      prevClose: item.prevClose,
+      change: item.change,
+      change_percent: item.change_percent,
+      captured_at: item.captured_at,
+      market_status: config.market_status
+    }]
+
+    // Check alerts
+    const alerts = checkAlerts(item, config)
+
+    return { data, alerts }
+  }
+}