refactor(meter):表计档案模板的下载改为使用Excel 生成的方法实现。

controller/meter.go

@@ -1,6 +1,7 @@
 package controller
 
 import (
+	"electricity_bill_calc/excel"
 	"electricity_bill_calc/logger"
 	"electricity_bill_calc/model"
 	"electricity_bill_calc/repository"
@@ -160,10 +161,24 @@ func downloadMeterArchiveTemplate(c *fiber.Ctx) error {
 		meterLog.Error("无法下载指定的园区表计登记模板，无法获取园区信息", zap.Error(err))
 		return result.NotFound(err.Error())
 	}
-	return c.Download(
-		"./assets/meter_04kv_template.xlsx",
-		fmt.Sprintf("%s_表计档案.xlsx", parkDetail.Name),
-	)
+	buildings, err := repository.ParkRepository.RetrieveParkBuildings(parkId)
+	if err != nil {
+		meterLog.Error("无法下载指定的园区表计登记模板，无法获取园区建筑列表", zap.Error(err))
+		return result.NotFound(fmt.Sprintf("无法获取园区建筑列表，%s", err.Error()))
+	}
+	if err != nil {
+		meterLog.Error("无法下载指定的园区表计登记模板，无法生成表计登记模板", zap.Error(err))
+		return result.NotFound(fmt.Sprintf("无法生成表计登记模板，%s", err.Error()))
+	}
+	c.Status(fiber.StatusOK)
+	c.Set(fiber.HeaderContentType, fiber.MIMEOctetStream)
+	c.Set("Content-Transfer-Encoding", "binary")
+	c.Set(fiber.HeaderContentDisposition, fmt.Sprintf("attachment; filename=%s-表计登记模板.xlsx", parkDetail.Name))
+	templateGenerator := excel.NewMeterArchiveExcelTemplateGenerator()
+	defer templateGenerator.Close()
+	err = templateGenerator.WriteTemplateData(buildings)
+	templateGenerator.WriteTo(c.Response().BodyWriter())
+	return nil
 }
 
 // 从Excel文件中导入表计档案