first commit

internal/mysqldao/notification.go

@@ -0,0 +1,34 @@
+package mysqldao
+
+import (
+	"context"
+
+	"git.lzcwy.cn/zhengchiliu/zt-closet-manage-backend/global"
+	"git.lzcwy.cn/zhengchiliu/zt-closet-manage-backend/internal/mysqlmodel"
+	"gorm.io/gorm"
+)
+
+// NotificationDao 通知数据访问
+type NotificationDao struct {
+	db *gorm.DB
+}
+
+// NewNotificationDao 创建通知 DAO
+func NewNotificationDao() *NotificationDao {
+	return &NotificationDao{db: global.MysqlEngine}
+}
+
+// NotificationBatchCreate 批量插入通知（单用户/分片广播共用）
+func (d *NotificationDao) NotificationBatchCreate(ctx context.Context, notifications []mysqlmodel.UserNotification) error {
+	ctx, span := global.Tracer.Start(ctx, "mysqldao.NotificationBatchCreate")
+	defer span.End()
+
+	if len(notifications) == 0 {
+		return nil
+	}
+	if err := d.db.WithContext(ctx).CreateInBatches(notifications, 500).Error; err != nil {
+		span.RecordError(err)
+		return err
+	}
+	return nil
+}