From de18d4f297497819178d21723068b04f6ecf4654 Mon Sep 17 00:00:00 2001
From: yarnom <admin@yarnom.com>
Date: Wed, 12 Nov 2025 16:38:35 +0800
Subject: [PATCH] =?UTF-8?q?feat:=20=E6=96=B0=E5=A2=9E=E9=9B=B7=E8=BE=BE?=
 =?UTF-8?q?=E7=AB=99?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 internal/tools/exporter.go | 114 +++++++++++++++++++++++++++++++++++++
 1 file changed, 114 insertions(+)

diff --git a/internal/tools/exporter.go b/internal/tools/exporter.go
index fde213c..a6591b3 100644
--- a/internal/tools/exporter.go
+++ b/internal/tools/exporter.go
@@ -1,6 +1,7 @@
 package tools
 
 import (
+	"bufio"
 	"compress/gzip"
 	"context"
 	"database/sql"
@@ -308,6 +309,119 @@ func (e *Exporter) exportBucket(ctx context.Context, bucketStart, bucketEnd time
 		return err
 	}
 
+	// 追加 RADAR 设备：按 stations.station_alias 在 radar_weather 中取不晚于桶末的最新一条
+	e.logger.Printf("开始写出 RADAR 设备（按 radar_weather 最新一条）...")
+	radarRows, err := e.pg.QueryContext(ctx, `
+        SELECT name, latitude, longitude, altitude, station_alias
+        FROM stations
+        WHERE device_type = 'RADAR'
+          AND latitude IS NOT NULL AND longitude IS NOT NULL
+    `)
+	if err != nil {
+		e.logger.Printf("查询 RADAR 站点失败: %v", err)
+	} else {
+		defer radarRows.Close()
+		// 复用已打开的 CSV 文件句柄
+		rf, rerr := os.OpenFile(activePath, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0o644)
+		if rerr != nil {
+			return rerr
+		}
+		rfw := bufio.NewWriter(rf)
+		defer func() { _ = rfw.Flush(); _ = rf.Close() }()
+
+		for radarRows.Next() {
+			var (
+				name           string
+				lat, lon, elev sql.NullFloat64
+				alias          sql.NullString
+			)
+			if err := radarRows.Scan(&name, &lat, &lon, &elev, &alias); err != nil {
+				e.logger.Printf("扫描 RADAR 站点失败: %v", err)
+				continue
+			}
+			if !alias.Valid || strings.TrimSpace(alias.String) == "" {
+				continue
+			}
+			// radar_weather 中取 <= 桶末时间的最新一条
+			var (
+				rwTemp, rwHum, rwWS, rwWD, rwP sql.NullFloat64
+				rwDT                           time.Time
+			)
+			qerr := e.pg.QueryRowContext(ctx, `
+                SELECT temperature, humidity, wind_speed, wind_direction, pressure, dt
+                FROM radar_weather
+                WHERE alias = $1 AND dt <= $2
+                ORDER BY dt DESC
+                LIMIT 1
+            `, alias.String, bucketEnd).Scan(&rwTemp, &rwHum, &rwWS, &rwWD, &rwP, &rwDT)
+			if qerr != nil {
+				if !errors.Is(qerr, sql.ErrNoRows) {
+					e.logger.Printf("查询 radar_weather 失败: alias=%s, err=%v", alias.String, qerr)
+				}
+				continue
+			}
+
+			// 字段映射：pressure = pressure/100，温度/风/湿度直接使用，露点/PWV 留空；station_id 与 station_name 都使用 stations.name
+			pressureStr := ""
+			if rwP.Valid {
+				pressureStr = fmtFloat(rwP.Float64/100.0, 2)
+			}
+			tempStr := ""
+			if rwTemp.Valid {
+				tempStr = fmtFloat(rwTemp.Float64, -1)
+			}
+			wsStr := ""
+			if rwWS.Valid {
+				wsStr = fmtFloat(rwWS.Float64, 3)
+			}
+			wdStr := ""
+			if rwWD.Valid {
+				wdStr = fmtFloat(rwWD.Float64, 0)
+			}
+			rhStr := ""
+			if rwHum.Valid {
+				rhStr = fmtFloat(rwHum.Float64, -1)
+			}
+
+			dateTimeStr := bucketEnd.In(e.loc).Format("2006-01-02 15:04:05")
+			var b strings.Builder
+			b.WriteString(fmtNullFloat(lat))
+			b.WriteByte(',')
+			b.WriteString(fmtNullFloat(lon))
+			b.WriteByte(',')
+			b.WriteString(name) // station_id = stations.name
+			b.WriteByte(',')
+			b.WriteString(name) // station_name = stations.name
+			b.WriteByte(',')
+			b.WriteString(dateTimeStr)
+			b.WriteByte(',')
+			b.WriteString(fmtNullFloat(elev))
+			b.WriteByte(',')
+			b.WriteString(pressureStr)
+			b.WriteByte(',')
+			b.WriteString(tempStr)
+			b.WriteByte(',')
+			b.WriteByte(',') // dewpoint 留空
+			b.WriteString(wsStr)
+			b.WriteByte(',')
+			b.WriteString(wdStr)
+			b.WriteByte(',')
+			b.WriteString(rhStr)
+			b.WriteByte(',')
+			b.WriteByte(',') // ztd 留空
+			b.WriteByte(',') // pwv 留空
+
+			if _, err := rfw.WriteString(b.String() + "\n"); err != nil {
+				e.logger.Printf("写入 RADAR CSV 失败: %v", err)
+			} else {
+				total++
+			}
+		}
+		if err := radarRows.Err(); err != nil {
+			return err
+		}
+	}
+
 	// 检查哪些站点在这个桶完全没有数据
 	var missingCount int
 	for _, station := range eligibleStations {