油价集成

server/apizero/oil-history.js

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+// 浙江省油价历史: 走 Prisma 落库 + apizero price 接口写入
+// 设计:
+//   - 每天 04:00 cron 检查 schedule, 待定且 <= 昨天的调价日 -> 抓 price?province=浙江 存本表
+//   - unique (date, province, fuel) 防重复
+//   - 查询 API: 取某省某油品最近 N 天 (默认 180)
+import { prisma } from '../db.js'
+import * as client from './client.js'
+
+const PROVINCE = '浙江'
+// 油品 -> apizero prices 对象里的 key (price action 返回 "92号汽油" 这种带后缀的 key)
+const FUEL_KEYS = {
+  '92': '92号汽油',
+  '95': '95号汽油',
+  '0': '0号柴油',
+}
+
+// 解析 apizero price action 返回的 prices (中文 key) -> 标准 fuel code
+function parsePrice(data) {
+  if (!data || !data.prices) throw new Error('apizero 响应无 prices 字段')
+  const out = {}
+  for (const [fuel, label] of Object.entries(FUEL_KEYS)) {
+    const raw = data.prices[label]
+    if (typeof raw === 'string') {
+      // "7.64 元/升" -> 7.64
+      const m = raw.match(/^([\d.]+)/)
+      if (m) out[fuel] = parseFloat(m[1])
+    } else if (typeof raw === 'number') {
+      out[fuel] = raw
+    }
+  }
+  return out
+}
+
+// 抓一次浙江当前价并入库 (date = 今日)
+// 返回 { inserted, skipped } (按 unique 约束: 已存在则 skip)
+export async function fetchAndStore() {
+  const data = await client.get('oil-price-forecast', { action: 'price', province: PROVINCE })
+  const prices = parsePrice(data)
+  if (Object.keys(prices).length === 0) {
+    throw new Error('apizero 返回价格为空')
+  }
+  const date = new Date()
+  // 抹掉时分秒, 便于按天比较
+  date.setHours(0, 0, 0, 0)
+
+  let inserted = 0
+  let skipped = 0
+  for (const [fuel, price] of Object.entries(prices)) {
+    try {
+      await prisma.oilPriceHistory.create({
+        data: { date, province: PROVINCE, fuel, price, source: 'apizero' },
+      })
+      inserted++
+    } catch (e) {
+      // P2002: unique 冲突 -> 跳过
+      if (e?.code === 'P2002') skipped++
+      else throw e
+    }
+  }
+  return { inserted, skipped, date: date.toISOString().slice(0, 10) }
+}
+
+// 查询某省某油品最近 N 天
+//   province 必填, 默认 浙江
+//   fuel 可选, 留空返回 4 个油品
+//   days 默认 180
+export async function query({ province = PROVINCE, fuel, days = 180 }) {
+  const since = new Date()
+  since.setDate(since.getDate() - days)
+  since.setHours(0, 0, 0, 0)
+
+  const where = { province, date: { gte: since } }
+  if (fuel) where.fuel = fuel
+
+  const rows = await prisma.oilPriceHistory.findMany({
+    where,
+    orderBy: [{ date: 'asc' }],
+  })
+
+  // 整形: Decimal -> number
+  return rows.map((r) => ({
+    date: r.date.toISOString().slice(0, 10),
+    province: r.province,
+    fuel: r.fuel,
+    price: Number(r.price),
+  }))
+}