cmd/cart/cart-grain.go

@@ -8,6 +8,7 @@ import (
 	"time"
 
 	messages "git.tornberg.me/go-cart-actor/pkg/messages"
+	"git.tornberg.me/go-cart-actor/pkg/voucher"
 )
 
 // Legacy padded [16]byte CartId and its helper methods removed.
@@ -63,17 +64,18 @@ type CartGrain struct {
 	lastItemId        int
 	lastDeliveryId    int
 	lastAccess        time.Time
-	lastChange        time.Time       // unix seconds of last successful mutation (replay sets from event ts)
-	Id                CartId          `json:"id"`
-	Items             []*CartItem     `json:"items"`
-	TotalPrice        int64           `json:"totalPrice"`
-	TotalTax          int64           `json:"totalTax"`
-	TotalDiscount     int64           `json:"totalDiscount"`
-	Deliveries        []*CartDelivery `json:"deliveries,omitempty"`
-	Processing        bool            `json:"processing"`
-	PaymentInProgress bool            `json:"paymentInProgress"`
-	OrderReference    string          `json:"orderReference,omitempty"`
-	PaymentStatus     string          `json:"paymentStatus,omitempty"`
+	lastChange        time.Time          // unix seconds of last successful mutation (replay sets from event ts)
+	Id                CartId             `json:"id"`
+	Items             []*CartItem        `json:"items"`
+	TotalPrice        int64              `json:"totalPrice"`
+	TotalTax          int64              `json:"totalTax"`
+	TotalDiscount     int64              `json:"totalDiscount"`
+	Deliveries        []*CartDelivery    `json:"deliveries,omitempty"`
+	Processing        bool               `json:"processing"`
+	PaymentInProgress bool               `json:"paymentInProgress"`
+	OrderReference    string             `json:"orderReference,omitempty"`
+	PaymentStatus     string             `json:"paymentStatus,omitempty"`
+	Vouchers          []*voucher.Voucher `json:"vouchers,omitempty"`
 }
 
 func (c *CartGrain) GetId() uint64 {

cmd/cart/main.go

@@ -16,6 +16,7 @@ import (
 	"git.tornberg.me/go-cart-actor/pkg/discovery"
 	messages "git.tornberg.me/go-cart-actor/pkg/messages"
 	"git.tornberg.me/go-cart-actor/pkg/proxy"
+	"git.tornberg.me/go-cart-actor/pkg/voucher"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promauto"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
@@ -92,10 +93,14 @@ func GetDiscovery() discovery.Discovery {
 	return discovery.NewK8sDiscovery(client)
 }
 
+type MutationContext struct {
+	VoucherService voucher.Service
+}
+
 func main() {
 
 	controlPlaneConfig := actor.DefaultServerConfig()
-
+	ctx := MutationContext{}
 	reg := actor.NewMutationRegistry()
 	reg.RegisterMutations(
 		actor.NewMutation(AddItem, func() *messages.AddItem {
@@ -125,6 +130,9 @@ func main() {
 		actor.NewMutation(ClearCart, func() *messages.ClearCartRequest {
 			return &messages.ClearCartRequest{}
 		}),
+		actor.NewMutation(ctx.AddVoucher, func() *messages.AddVoucher {
+			return &messages.AddVoucher{}
+		}),
 	)
 	diskStorage := actor.NewDiskStorage[CartGrain]("data", reg)
 	poolConfig := actor.GrainPoolConfig[CartGrain]{

cmd/cart/mutation_add_voucher.go

@@ -0,0 +1,26 @@
+package main
+
+import (
+	"fmt"
+
+	"git.tornberg.me/go-cart-actor/pkg/messages"
+)
+
+func (ctx *MutationContext) AddVoucher(g *CartGrain, m *messages.AddVoucher) error {
+	if m == nil {
+		return fmt.Errorf("AddVoucher: nil payload")
+	}
+
+	voucher, err := ctx.VoucherService.GetVoucher(m.Code)
+	if err != nil {
+		return fmt.Errorf("AddVoucher: %w", err)
+	}
+
+	if voucher == nil {
+		return nil
+	}
+
+	g.Vouchers = append(g.Vouchers, voucher)
+	g.UpdateTotals()
+	return nil
+}

cmd/cart/pool-server.go

@@ -437,6 +437,19 @@ func (s *PoolServer) ProxyHandler(fn func(w http.ResponseWriter, r *http.Request
 	}
 }
 
+func (s *PoolServer) AddVoucherHandler(w http.ResponseWriter, r *http.Request, cartId CartId) error {
+	msg := &messages.AddVoucher{}
+	json.NewDecoder(r.Body).Decode(msg)
+	reply, err := s.Apply(uint64(cartId), msg)
+	if err != nil {
+		w.WriteHeader(http.StatusInternalServerError)
+		w.Write([]byte(err.Error()))
+		return err
+	}
+	s.WriteResult(w, reply)
+	return nil
+}
+
 func (s *PoolServer) Serve() *http.ServeMux {
 
 	mux := http.NewServeMux()
@@ -458,6 +471,8 @@ func (s *PoolServer) Serve() *http.ServeMux {
 	mux.HandleFunc("POST /delivery", CookieCartIdHandler(s.ProxyHandler(s.SetDeliveryHandler)))
 	mux.HandleFunc("DELETE /delivery/{deliveryId}", CookieCartIdHandler(s.ProxyHandler(s.RemoveDeliveryHandler)))
 	mux.HandleFunc("PUT /delivery/{deliveryId}/pickupPoint", CookieCartIdHandler(s.ProxyHandler(s.SetPickupPointHandler)))
+	mux.HandleFunc("PUT /voucher", CookieCartIdHandler(s.ProxyHandler(s.AddVoucherHandler)))
+
 	//mux.HandleFunc("GET /checkout", CookieCartIdHandler(s.ProxyHandler(s.HandleCheckout)))
 	//mux.HandleFunc("GET /confirmation/{orderId}", CookieCartIdHandler(s.ProxyHandler(s.HandleConfirmation)))
 

pkg/messages/messages.pb.go

@@ -977,6 +977,50 @@ func (x *InitializeCheckout) GetPaymentInProgress() bool {
 	return false
 }
 
+type AddVoucher struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Code          string                 `protobuf:"bytes,1,opt,name=code,proto3" json:"code,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *AddVoucher) Reset() {
+	*x = AddVoucher{}
+	mi := &file_messages_proto_msgTypes[13]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *AddVoucher) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*AddVoucher) ProtoMessage() {}
+
+func (x *AddVoucher) ProtoReflect() protoreflect.Message {
+	mi := &file_messages_proto_msgTypes[13]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use AddVoucher.ProtoReflect.Descriptor instead.
+func (*AddVoucher) Descriptor() ([]byte, []int) {
+	return file_messages_proto_rawDescGZIP(), []int{13}
+}
+
+func (x *AddVoucher) GetCode() string {
+	if x != nil {
+		return x.Code
+	}
+	return ""
+}
+
 var File_messages_proto protoreflect.FileDescriptor
 
 var file_messages_proto_rawDesc = string([]byte{
@@ -1107,10 +1151,12 @@ var file_messages_proto_rawDesc = string([]byte{
 	0x74, 0x61, 0x74, 0x75, 0x73, 0x12, 0x2c, 0x0a, 0x11, 0x70, 0x61, 0x79, 0x6d, 0x65, 0x6e, 0x74,
 	0x49, 0x6e, 0x50, 0x72, 0x6f, 0x67, 0x72, 0x65, 0x73, 0x73, 0x18, 0x03, 0x20, 0x01, 0x28, 0x08,
 	0x52, 0x11, 0x70, 0x61, 0x79, 0x6d, 0x65, 0x6e, 0x74, 0x49, 0x6e, 0x50, 0x72, 0x6f, 0x67, 0x72,
-	0x65, 0x73, 0x73, 0x42, 0x2e, 0x5a, 0x2c, 0x67, 0x69, 0x74, 0x2e, 0x74, 0x6f, 0x72, 0x6e, 0x62,
-	0x65, 0x72, 0x67, 0x2e, 0x6d, 0x65, 0x2f, 0x67, 0x6f, 0x2d, 0x63, 0x61, 0x72, 0x74, 0x2d, 0x61,
-	0x63, 0x74, 0x6f, 0x72, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x3b, 0x6d, 0x65, 0x73, 0x73, 0x61,
-	0x67, 0x65, 0x73, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+	0x65, 0x73, 0x73, 0x22, 0x20, 0x0a, 0x0a, 0x41, 0x64, 0x64, 0x56, 0x6f, 0x75, 0x63, 0x68, 0x65,
+	0x72, 0x12, 0x12, 0x0a, 0x04, 0x63, 0x6f, 0x64, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52,
+	0x04, 0x63, 0x6f, 0x64, 0x65, 0x42, 0x2e, 0x5a, 0x2c, 0x67, 0x69, 0x74, 0x2e, 0x74, 0x6f, 0x72,
+	0x6e, 0x62, 0x65, 0x72, 0x67, 0x2e, 0x6d, 0x65, 0x2f, 0x67, 0x6f, 0x2d, 0x63, 0x61, 0x72, 0x74,
+	0x2d, 0x61, 0x63, 0x74, 0x6f, 0x72, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x3b, 0x6d, 0x65, 0x73,
+	0x73, 0x61, 0x67, 0x65, 0x73, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 })
 
 var (
@@ -1125,7 +1171,7 @@ func file_messages_proto_rawDescGZIP() []byte {
 	return file_messages_proto_rawDescData
 }
 
-var file_messages_proto_msgTypes = make([]protoimpl.MessageInfo, 13)
+var file_messages_proto_msgTypes = make([]protoimpl.MessageInfo, 14)
 var file_messages_proto_goTypes = []any{
 	(*AddRequest)(nil),          // 0: messages.AddRequest
 	(*ClearCartRequest)(nil),    // 1: messages.ClearCartRequest
@@ -1140,6 +1186,7 @@ var file_messages_proto_goTypes = []any{
 	(*OrderCreated)(nil),        // 10: messages.OrderCreated
 	(*Noop)(nil),                // 11: messages.Noop
 	(*InitializeCheckout)(nil),  // 12: messages.InitializeCheckout
+	(*AddVoucher)(nil),          // 13: messages.AddVoucher
 }
 var file_messages_proto_depIdxs = []int32{
 	7, // 0: messages.SetDelivery.pickupPoint:type_name -> messages.PickupPoint
@@ -1166,7 +1213,7 @@ func file_messages_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: unsafe.Slice(unsafe.StringData(file_messages_proto_rawDesc), len(file_messages_proto_rawDesc)),
 			NumEnums:      0,
-			NumMessages:   13,
+			NumMessages:   14,
 			NumExtensions: 0,
 			NumServices:   0,
 		},

pkg/voucher/service.go

@@ -0,0 +1,32 @@
+package voucher
+
+import "math"
+
+type Rule struct {
+	Type  string `json:"type"`
+	Value int64  `json:"value"`
+}
+
+type Voucher struct {
+	Code     string `json:"code"`
+	Value    int64  `json:"discount"`
+	TaxValue int64  `json:"taxValue"`
+	TaxRate  int    `json:"taxRate"`
+	rules    []Rule `json:"rules"`
+}
+
+type Service struct {
+	// Add fields here
+
+}
+
+func (s *Service) GetVoucher(code string) (*Voucher, error) {
+	value := int64(math.Round(100 * math.Pow(10, 2)))
+	return &Voucher{
+		Code:     code,
+		Value:    value,
+		TaxValue: int64(float64(value) * 0.2),
+		TaxRate:  2500,
+		rules:    nil,
+	}, nil
+}

proto/messages.proto

@@ -103,3 +103,7 @@ message InitializeCheckout {
         string status = 2;
         bool paymentInProgress = 3;
 }
+
+message AddVoucher {
+    string code = 1;
+}