更新

internal/service/common_service.go

@@ -0,0 +1,32 @@
+package service
+
+import (
+	"gorm.io/gorm"
+	"level_go/internal/model"
+)
+
+type CommonService struct {
+	DB *gorm.DB
+}
+
+func (s *CommonService) GetTradeCalendar() (model.CalendarResponse, error) {
+	var results []struct {
+		DateStr string `gorm:"column:ds"`
+	}
+	var resp model.CalendarResponse
+
+	err := s.DB.Model(&model.TradeCalendar{}).
+		Select("DATE_FORMAT(cal_date, '%Y-%m-%d') as ds").
+		Where("is_open = ? AND exchange = ?", 1, "SSE").
+		Order("cal_date ASC").Scan(&results).Error
+
+	if err != nil {
+		return resp, err
+	}
+
+	for _, r := range results {
+		resp.OpenDates = append(resp.OpenDates, r.DateStr)
+		resp.MaxDate = r.DateStr
+	}
+	return resp, nil
+}