all the refactor

pkg/voucher/parser.go

@@ -7,6 +7,8 @@ import (
 	"strconv"
 	"strings"
 	"unicode"
+
+	"git.k6n.net/mats/platform/money"
 )
 
 /*
@@ -74,7 +76,7 @@ const (
 type ruleCondition struct {
 	Kind       RuleKind
 	StringVals []string // For sku / category multi-value list
-	MinValue   *int64   // For numeric threshold rules
+	MinValue   *money.Cents // For numeric threshold rules (minor units)
 	// Operator reserved for future (e.g., >, >=, ==). Currently always ">=" for numeric kinds.
 	Operator string
 }
@@ -90,13 +92,13 @@ type RuleSet struct {
 type Item struct {
 	Sku       string
 	Category  string
-	UnitPrice int64 // Inc VAT (single unit)
+	UnitPrice money.Cents // Inc VAT (single unit)
 }
 
 // EvalContext bundles cart-like data necessary for evaluation.
 type EvalContext struct {
 	Items        []Item
-	CartTotalInc int64
+	CartTotalInc money.Cents
 }
 
 // Applies returns true if all rule conditions pass for the context.
@@ -268,9 +270,10 @@ func parseNumericRule(frag string) (ruleCondition, error) {
 		return ruleCondition{}, fmt.Errorf("negative threshold %d", value)
 	}
 
+	mv := money.Cents(value)
 	return ruleCondition{
 		Kind:     kind,
-		MinValue: &value,
+		MinValue: &mv,
 		Operator: ">=",
 	}, nil
 }

pkg/voucher/parser_test.go

@@ -102,7 +102,7 @@ func TestParseRules_Invalid(t *testing.T) {
 }
 
 func TestRuleSet_Applies(t *testing.T) {
-	rs := MustParseRules("sku=ABC123|XYZ999; category=Shoes|min_total>=10000; min_item_price>=3000")
+	rs := MustParseRules("sku=ABC123|XYZ999; category=Shoes; min_total>=10000; min_item_price>=3000")
 
 	ctx := EvalContext{
 		Items: []Item{

pkg/voucher/service.go

@@ -7,18 +7,19 @@ import (
 	"os"
 
 	messages "git.k6n.net/mats/go-cart-actor/proto/cart"
+	"git.k6n.net/mats/platform/money"
 )
 
 type Rule struct {
-	Type  string `json:"type"`
-	Value int64  `json:"value"`
+	Type  string      `json:"type"`
+	Value money.Cents `json:"value"`
 }
 
 type Voucher struct {
-	Code        string `json:"code"`
-	Value       int64  `json:"value"`
-	Rules       string `json:"rules"`
-	Description string `json:"description,omitempty"`
+	Code        string      `json:"code"`
+	Value       money.Cents `json:"value"`
+	Rules       string      `json:"rules"`
+	Description string      `json:"description,omitempty"`
 }
 
 type Service struct {
@@ -42,7 +43,7 @@ func (s *Service) GetVoucher(code string) (*messages.AddVoucher, error) {
 
 	return &messages.AddVoucher{
 		Code:        code,
-		Value:       v.Value,
+		Value:       v.Value.Int64(), // proto boundary: AddVoucher.Value is int64
 		Description: v.Description,
 		VoucherRules: []string{
 			v.Rules,