错误的套餐购买限制

internal/service/package/addon_main_package.go

@@ -0,0 +1,41 @@
+package packagepkg
+
+import (
+	"time"
+
+	"github.com/break/junhong_cmp_fiber/internal/model"
+	"github.com/break/junhong_cmp_fiber/pkg/constants"
+	"gorm.io/gorm"
+)
+
+// FindAttachableMainPackageForAddon 查询加油包可挂靠的主套餐。
+// 已用完但未过期的主套餐仍可挂靠；已过期、已失效的主套餐不可挂靠。
+func FindAttachableMainPackageForAddon(tx *gorm.DB, carrierType string, carrierID uint, now time.Time) (*model.PackageUsage, error) {
+	var mainPackage model.PackageUsage
+	query := tx.Model(&model.PackageUsage{}).
+		Where("master_usage_id IS NULL").
+		Where(
+			"(status = ? OR (status IN ? AND (expires_at IS NULL OR expires_at > ?)))",
+			constants.PackageUsageStatusPending,
+			[]int{
+				constants.PackageUsageStatusActive,
+				constants.PackageUsageStatusDepleted,
+			},
+			now,
+		).
+		Order("priority ASC")
+
+	switch carrierType {
+	case constants.AssetWalletResourceTypeIotCard, "card":
+		query = query.Where("iot_card_id = ?", carrierID)
+	case constants.AssetWalletResourceTypeDevice:
+		query = query.Where("device_id = ?", carrierID)
+	default:
+		return nil, gorm.ErrRecordNotFound
+	}
+
+	if err := query.First(&mainPackage).Error; err != nil {
+		return nil, err
+	}
+	return &mainPackage, nil
+}