实现套餐生效条件覆盖与购买快照

internal/service/package/terms.go

@@ -0,0 +1,49 @@
+package packagepkg
+
+import (
+	"github.com/break/junhong_cmp_fiber/internal/model"
+	"github.com/break/junhong_cmp_fiber/pkg/constants"
+	"github.com/break/junhong_cmp_fiber/pkg/errors"
+)
+
+// ValidateExpiryBaseOverride 校验显式提交的分配生效条件覆盖。
+func ValidateExpiryBaseOverride(value *string, submitted bool) (*string, error) {
+	if !submitted {
+		return nil, errors.New(errors.CodeInvalidParam)
+	}
+	if value == nil {
+		return nil, nil
+	}
+	if *value != constants.PackageExpiryBaseFromActivation && *value != constants.PackageExpiryBaseFromPurchase {
+		return nil, errors.New(errors.CodeInvalidParam)
+	}
+	return value, nil
+}
+
+// EffectiveExpiryBase 返回套餐分配最终采用的生效条件。
+func EffectiveExpiryBase(pkg *model.Package, allocation *model.ShopPackageAllocation) string {
+	if allocation != nil && allocation.ExpiryBaseOverride != nil {
+		return *allocation.ExpiryBaseOverride
+	}
+	return pkg.ExpiryBase
+}
+
+// ExpiryBaseName 返回生效条件中文名称。
+func ExpiryBaseName(value string) string {
+	switch value {
+	case constants.PackageExpiryBaseFromActivation:
+		return "实名激活时生效"
+	case constants.PackageExpiryBaseFromPurchase:
+		return "购买即生效"
+	default:
+		return "未知"
+	}
+}
+
+// ExpiryBaseOverrideName 返回覆盖值中文名称，空值表示跟随套餐默认。
+func ExpiryBaseOverrideName(value *string) string {
+	if value == nil {
+		return "跟随套餐默认"
+	}
+	return ExpiryBaseName(*value)
+}