more features

2024-11-11 09:47:13 +01:00
parent 46d9f1dd96
commit 8027402b7c
11 changed files with 730 additions and 106 deletions
--- a/cart-grain.go
+++ b/cart-grain.go
@@ -43,10 +43,10 @@ type CartGrain struct {
 	lastItemId      int
 	lastDeliveryId  int
 	storageMessages []Message
-	Id              CartId      `json:"id"`
-	Items           []*CartItem `json:"items"`
-	TotalPrice      int64       `json:"totalPrice"`
-	Deliveries      []string    `json:"deliveries,omitempty"`
+	Id              CartId         `json:"id"`
+	Items           []*CartItem    `json:"items"`
+	TotalPrice      int64          `json:"totalPrice"`
+	Deliveries      []CartDelivery `json:"deliveries,omitempty"`
 }

 type Grain interface {
@@ -162,13 +162,60 @@ func (c *CartGrain) HandleMessage(message *Message, isReplay bool) ([]byte, erro
 				})
 				c.TotalPrice += msg.Price * int64(msg.Quantity)
 			}
+		}
+	case ChangeQuantityType:
+		msg, ok := message.Content.(*messages.ChangeQuantity)
+		if !ok {
+			err = fmt.Errorf("expected RemoveItem")
+		} else {
+			for i, item := range c.Items {
+				if item.Id == int(msg.Id) {
+					if item.Quantity <= int(msg.Quantity) {
+						c.Items = append(c.Items[:i], c.Items[i+1:]...)

+					} else {
+						item.Quantity -= int(msg.Quantity)
+					}
+					c.TotalPrice -= item.Price * int64(msg.Quantity)
+
+					break
+				}
+			}
 		}
 	case RemoveItemType:
-		//msg, ok := message.Content.(*messages.RemoveItem)
+		msg, ok := message.Content.(*messages.RemoveItem)
+		if !ok {
+			err = fmt.Errorf("expected RemoveItem")
+		} else {
+			for i, item := range c.Items {
+				if item.Id == int(msg.Id) {
+					c.TotalPrice -= item.Price * int64(item.Quantity)
+					c.Items = append(c.Items[:i], c.Items[i+1:]...)
+					break
+				}
+			}
+		}
 	case AddDeliveryType:
-		c.lastDeliveryId++
-		//msg, ok := message.Content.(*messages.AddDelivery)
+		msg, ok := message.Content.(*messages.SetDelivery)
+		if !ok {
+			err = fmt.Errorf("expected SetDelivery")
+		} else {
+			c.lastDeliveryId++
+			items := make([]int, 0)
+			for _, id := range msg.Items {
+				for _, item := range c.Items {
+					if item.Id == int(id) {
+						items = append(items, int(item.Id))
+						break
+					}
+				}
+			}
+			c.Deliveries = append(c.Deliveries, CartDelivery{
+				Provider: msg.Provider,
+				Price:    49,
+				Items:    items,
+			})
+		}
 	case RemoveDeliveryType:
 	default:
 		err = fmt.Errorf("unknown message type %d", message.Type)
--- a/main.go
+++ b/main.go
@@ -38,7 +38,7 @@ func spawn(id CartId) (*CartGrain, error) {
 	ret := &CartGrain{
 		lastItemId:      0,
 		lastDeliveryId:  0,
-		Deliveries:      []string{},
+		Deliveries:      []CartDelivery{},
 		Id:              id,
 		Items:           []*CartItem{},
 		storageMessages: []Message{},
--- a/message-handler.go
+++ b/message-handler.go
@@ -0,0 +1,221 @@
+package main
+
+import (
+	"fmt"
+	"io"
+
+	messages "git.tornberg.me/go-cart-actor/proto"
+	"google.golang.org/protobuf/proto"
+)
+
+var Handlers = map[uint16]MessageHandler{
+	AddRequestType:     &AddRequestHandler{},
+	AddItemType:        &AddItemHandler{},
+	ChangeQuantityType: &ChangeQuantityHandler{},
+	SetDeliveryType:    &SetDeliveryHandler{},
+	RemoveItemType:     &RemoveItemHandler{},
+	RemoveDeliveryType: &RemoveDeliveryHandler{},
+}
+
+func GetMessageHandler(t uint16) (MessageHandler, error) {
+	h, ok := Handlers[t]
+	if !ok {
+		return nil, fmt.Errorf("no handler for type %d", t)
+	}
+	return h, nil
+}
+
+type MessageHandler interface {
+	Write(*Message, io.Writer) error
+	Read(data []byte) (interface{}, error)
+	Is(*Message) bool
+}
+type TypedMessageHandler struct {
+	Type uint16
+}
+
+type AddRequestHandler struct {
+	TypedMessageHandler
+}
+
+func (h *AddRequestHandler) Write(m *Message, w io.Writer) error {
+	messageBytes, err := proto.Marshal(m.Content.(*messages.AddRequest))
+	if err != nil {
+		return err
+	}
+	w.Write(messageBytes)
+	return nil
+}
+
+func (h *AddRequestHandler) Read(data []byte) (interface{}, error) {
+	msg := &messages.AddRequest{}
+
+	err := proto.Unmarshal(data, msg)
+	if err != nil {
+		return nil, err
+	}
+	return msg, nil
+}
+
+func (h *AddRequestHandler) Is(m *Message) bool {
+	if m.Type != AddRequestType {
+		return false
+	}
+	_, ok := m.Content.(*messages.AddRequest)
+	return ok
+}
+
+type AddItemHandler struct {
+	TypedMessageHandler
+}
+
+func (h *AddItemHandler) Write(m *Message, w io.Writer) error {
+	messageBytes, err := proto.Marshal(m.Content.(*messages.AddItem))
+	if err != nil {
+		return err
+	}
+	w.Write(messageBytes)
+	return nil
+}
+
+func (h *AddItemHandler) Read(data []byte) (interface{}, error) {
+	msg := &messages.AddItem{}
+
+	err := proto.Unmarshal(data, msg)
+	if err != nil {
+		return nil, err
+	}
+	return msg, nil
+}
+
+func (h *AddItemHandler) Is(m *Message) bool {
+	if m.Type != AddItemType {
+		return false
+	}
+	_, ok := m.Content.(*messages.AddItem)
+	return ok
+}
+
+type ChangeQuantityHandler struct {
+	TypedMessageHandler
+}
+
+func (h *ChangeQuantityHandler) Write(m *Message, w io.Writer) error {
+	messageBytes, err := proto.Marshal(m.Content.(*messages.ChangeQuantity))
+	if err != nil {
+		return err
+	}
+	w.Write(messageBytes)
+	return nil
+}
+
+func (h *ChangeQuantityHandler) Read(data []byte) (interface{}, error) {
+	msg := &messages.ChangeQuantity{}
+
+	err := proto.Unmarshal(data, msg)
+	if err != nil {
+		return nil, err
+	}
+	return msg, nil
+}
+
+func (h *ChangeQuantityHandler) Is(m *Message) bool {
+	if m.Type != ChangeQuantityType {
+		return false
+	}
+	_, ok := m.Content.(*messages.ChangeQuantity)
+	return ok
+}
+
+type SetDeliveryHandler struct {
+	TypedMessageHandler
+}
+
+func (h *SetDeliveryHandler) Write(m *Message, w io.Writer) error {
+	messageBytes, err := proto.Marshal(m.Content.(*messages.SetDelivery))
+	if err != nil {
+		return err
+	}
+	w.Write(messageBytes)
+	return nil
+}
+
+func (h *SetDeliveryHandler) Read(data []byte) (interface{}, error) {
+	msg := &messages.SetDelivery{}
+
+	err := proto.Unmarshal(data, msg)
+	if err != nil {
+		return nil, err
+	}
+	return msg, nil
+}
+
+func (h *SetDeliveryHandler) Is(m *Message) bool {
+	if m.Type != ChangeQuantityType {
+		return false
+	}
+	_, ok := m.Content.(*messages.SetDelivery)
+	return ok
+}
+
+type RemoveItemHandler struct {
+	TypedMessageHandler
+}
+
+func (h *RemoveItemHandler) Write(m *Message, w io.Writer) error {
+	messageBytes, err := proto.Marshal(m.Content.(*messages.RemoveItem))
+	if err != nil {
+		return err
+	}
+	w.Write(messageBytes)
+	return nil
+}
+
+func (h *RemoveItemHandler) Read(data []byte) (interface{}, error) {
+	msg := &messages.RemoveItem{}
+
+	err := proto.Unmarshal(data, msg)
+	if err != nil {
+		return nil, err
+	}
+	return msg, nil
+}
+
+func (h *RemoveItemHandler) Is(m *Message) bool {
+	if m.Type != AddItemType {
+		return false
+	}
+	_, ok := m.Content.(*messages.RemoveItem)
+	return ok
+}
+
+type RemoveDeliveryHandler struct {
+	TypedMessageHandler
+}
+
+func (h *RemoveDeliveryHandler) Write(m *Message, w io.Writer) error {
+	messageBytes, err := proto.Marshal(m.Content.(*messages.RemoveDelivery))
+	if err != nil {
+		return err
+	}
+	w.Write(messageBytes)
+	return nil
+}
+
+func (h *RemoveDeliveryHandler) Read(data []byte) (interface{}, error) {
+	msg := &messages.RemoveDelivery{}
+
+	err := proto.Unmarshal(data, msg)
+	if err != nil {
+		return nil, err
+	}
+	return msg, nil
+}
+
+func (h *RemoveDeliveryHandler) Is(m *Message) bool {
+	if m.Type != AddItemType {
+		return false
+	}
+	_, ok := m.Content.(*messages.RemoveDelivery)
+	return ok
+}
--- a/message-handler_test.go
+++ b/message-handler_test.go
@@ -0,0 +1,90 @@
+package main
+
+import (
+	"bytes"
+	"testing"
+
+	messages "git.tornberg.me/go-cart-actor/proto"
+)
+
+func TestAddRequest(t *testing.T) {
+	h, err := GetMessageHandler(AddRequestType)
+	if err != nil {
+		t.Errorf("Error getting message handler: %v\n", err)
+	}
+	if h == nil {
+		t.Errorf("Expected message handler, got nil\n")
+	}
+	message := Message{
+		Type: AddRequestType,
+		Content: &messages.AddRequest{
+			Quantity: 2,
+			Sku:      "123",
+		},
+	}
+	var b bytes.Buffer
+	err = h.Write(&message, &b)
+	if err != nil {
+		t.Errorf("Error writing message: %v\n", err)
+	}
+	result, err := h.Read(b.Bytes())
+	if err != nil {
+		t.Errorf("Error reading message: %v\n", err)
+	}
+	if result == nil {
+		t.Errorf("Expected result, got nil\n")
+	}
+	r, ok := result.(*messages.AddRequest)
+	if !ok {
+		t.Errorf("Expected AddRequest, got %T\n", result)
+	}
+	if r.Quantity != 2 {
+		t.Errorf("Expected quantity 2, got %d\n", r.Quantity)
+	}
+	if r.Sku != "123" {
+		t.Errorf("Expected sku '123', got %s\n", r.Sku)
+	}
+}
+
+func TestItemRequest(t *testing.T) {
+	h, err := GetMessageHandler(AddItemType)
+	if err != nil {
+		t.Errorf("Error getting message handler: %v\n", err)
+	}
+	if h == nil {
+		t.Errorf("Expected message handler, got nil\n")
+	}
+	message := Message{
+		Type: AddItemType,
+		Content: &messages.AddItem{
+			Quantity: 2,
+			Sku:      "123",
+			Price:    100,
+			Name:     "Test item",
+			Image:    "test.jpg",
+		},
+	}
+	var b bytes.Buffer
+	err = h.Write(&message, &b)
+	if err != nil {
+		t.Errorf("Error writing message: %v\n", err)
+	}
+	result, err := h.Read(b.Bytes())
+	if err != nil {
+		t.Errorf("Error reading message: %v\n", err)
+	}
+	if result == nil {
+		t.Errorf("Expected result, got nil\n")
+	}
+	var r *messages.AddItem
+	ok := h.Is(&message)
+	if !ok {
+		t.Errorf("Expected AddRequest, got %T\n", result)
+	}
+	if r.Quantity != 2 {
+		t.Errorf("Expected quantity 2, got %d\n", r.Quantity)
+	}
+	if r.Sku != "123" {
+		t.Errorf("Expected sku '123', got %s\n", r.Sku)
+	}
+}
--- a/message-types.go
+++ b/message-types.go
@@ -6,4 +6,6 @@ const (
 	AddDeliveryType    = 3
 	RemoveItemType     = 4
 	RemoveDeliveryType = 5
+	ChangeQuantityType = 6
+	SetDeliveryType    = 7
 )
--- a/message.go
+++ b/message.go
@@ -3,12 +3,8 @@ package main
 import (
 	"bytes"
 	"encoding/binary"
-	"fmt"
 	"io"
 	"time"
-
-	messages "git.tornberg.me/go-cart-actor/proto"
-	"google.golang.org/protobuf/proto"
 )

 type StorableMessage interface {
@@ -43,21 +39,12 @@ func GetData(fn func(w io.Writer) error) ([]byte, error) {
 }

 func (m Message) Write(w io.Writer) error {
-	data, err := GetData(func(wr io.Writer) error {
-		if m.Type == AddRequestType {
-			messageBytes, err := proto.Marshal(m.Content.(*messages.AddRequest))
-			if err != nil {
-				return err
-			}
-			wr.Write(messageBytes)
-		} else if m.Type == AddItemType {
-			messageBytes, err := proto.Marshal(m.Content.(*messages.AddItem))
-			if err != nil {
-				return err
-			}
-			wr.Write(messageBytes)
-		}
-		return nil
+	h, err := GetMessageHandler(m.Type)
+	if err != nil {
+		return err
+	}
+	data, err := GetData(func(w io.Writer) error {
+		return h.Write(&m, w)
 	})
 	if err != nil {
 		return err
@@ -79,8 +66,12 @@ func (m Message) Write(w io.Writer) error {
 }

 func ReadMessage(reader io.Reader, m *Message) error {
+	h, err := GetMessageHandler(m.Type)
+	if err != nil {
+		return err
+	}
 	header := StorableMessageHeader{}
-	err := binary.Read(reader, binary.LittleEndian, &header)
+	err = binary.Read(reader, binary.LittleEndian, &header)
 	if err != nil {
 		return err
 	}
@@ -89,21 +80,13 @@ func ReadMessage(reader io.Reader, m *Message) error {
 	if err != nil {
 		return err
 	}
-	switch header.Type {
-	case AddRequestType:
-		msg := &messages.AddRequest{}
-		err = proto.Unmarshal(messageBytes, msg)
-		m.Content = msg
-	case AddItemType:
-		msg := &messages.AddItem{}
-		err = proto.Unmarshal(messageBytes, msg)
-		m.Content = msg
-	default:
-		return fmt.Errorf("unknown message type")
-	}
+
+	content, err := h.Read(messageBytes)
 	if err != nil {
 		return err
 	}
+	m.Content = content
+
 	m.Type = header.Type
 	m.TimeStamp = &header.TimeStamp

--- a/packet-queue.go
+++ b/packet-queue.go
@@ -55,7 +55,7 @@ func NewPacketQueue(connection net.Conn) *PacketQueue {
 					l = append(l, packet)
 				}
 			}
-
+			packetQueue.Set(float64(len(queue.Packets)))
 			queue.Packets = append(l, PacketWithData{
 				MessageType: packet.MessageType,
 				Added:       ts,
@@ -63,7 +63,6 @@ func NewPacketQueue(connection net.Conn) *PacketQueue {
 			})
 			queue.mu.Unlock()
 			packetsReceived.Inc()
-			packetQueue.Set(float64(len(queue.Packets)))
 		}
 	}()
 	return queue
--- a/pool-server.go
+++ b/pool-server.go
@@ -1,7 +1,10 @@
 package main

 import (
+	"encoding/json"
+	"fmt"
 	"net/http"
+	"strconv"

 	messages "git.tornberg.me/go-cart-actor/proto"
 )
@@ -18,21 +21,16 @@ func NewPoolServer(pool GrainPool, pod_name string) *PoolServer {
 	}
 }

-func (s *PoolServer) HandleGet(w http.ResponseWriter, r *http.Request) {
+func (s *PoolServer) HandleGet(w http.ResponseWriter, r *http.Request) error {
 	id := r.PathValue("id")
 	data, err := s.pool.Get(ToCartId(id))
 	if err != nil {
-		w.WriteHeader(http.StatusNotFound)
-		w.Write([]byte(err.Error()))
-		return
+		return err
 	}
-	w.Header().Set("Content-Type", "application/json")
-	w.Header().Set("X-Pod-Name", s.pod_name)
-	w.WriteHeader(http.StatusOK)
-	w.Write(data)
+	return s.WriteResult(w, data)
 }

-func (s *PoolServer) HandleAddSku(w http.ResponseWriter, r *http.Request) {
+func (s *PoolServer) HandleAddSku(w http.ResponseWriter, r *http.Request) error {
 	id := r.PathValue("id")
 	sku := r.PathValue("sku")
 	data, err := s.pool.Process(ToCartId(id), Message{
@@ -40,19 +38,79 @@ func (s *PoolServer) HandleAddSku(w http.ResponseWriter, r *http.Request) {
 		Content: &messages.AddRequest{Sku: sku},
 	})
 	if err != nil {
-		w.WriteHeader(http.StatusInternalServerError)
-		w.Write([]byte(err.Error()))
-		return
+		return err
 	}
+	return s.WriteResult(w, data)
+}
+
+func ErrorHandler(fn func(w http.ResponseWriter, r *http.Request) error) func(w http.ResponseWriter, r *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {
+		err := fn(w, r)
+		if err != nil {
+			w.WriteHeader(http.StatusInternalServerError)
+			w.Write([]byte(err.Error()))
+		}
+	}
+}
+
+func (s *PoolServer) WriteResult(w http.ResponseWriter, data []byte) error {
 	w.Header().Set("Content-Type", "application/json")
 	w.Header().Set("X-Pod-Name", s.pod_name)
 	w.WriteHeader(http.StatusOK)
-	w.Write(data)
+	_, err := w.Write(data)
+	return err
+}
+
+func (s *PoolServer) HandleDeleteItem(w http.ResponseWriter, r *http.Request) error {
+	id := r.PathValue("id")
+	itemIdString := r.PathValue("itemId")
+	itemId, err := strconv.Atoi(itemIdString)
+	if err != nil {
+		return err
+	}
+	data, err := s.pool.Process(ToCartId(id), Message{
+		Type:    RemoveItemType,
+		Content: &messages.RemoveItem{Id: int64(itemId)},
+	})
+	if err != nil {
+		return err
+	}
+	return s.WriteResult(w, data)
+}
+
+type SetDelivery struct {
+	Provider string  `json:"provider"`
+	Items    []int64 `json:"items"`
+}
+
+func (s *PoolServer) HandleSetDelivery(w http.ResponseWriter, r *http.Request) error {
+	id := r.PathValue("id")
+	var delivery *SetDelivery
+	err := json.NewDecoder(r.Body).Decode(delivery)
+	if err != nil {
+		return err
+	}
+	if delivery == nil {
+		return fmt.Errorf("no delivery data")
+	}
+	data, err := s.pool.Process(ToCartId(id), Message{
+		Type: SetDeliveryType,
+		Content: &messages.SetDelivery{
+			Provider: delivery.Provider,
+			Items:    delivery.Items,
+		},
+	})
+	if err != nil {
+		return err
+	}
+	return s.WriteResult(w, data)
 }

 func (s *PoolServer) Serve() *http.ServeMux {
 	mux := http.NewServeMux()
-	mux.HandleFunc("GET /{id}", s.HandleGet)
-	mux.HandleFunc("GET /{id}/add/{sku}", s.HandleAddSku)
+	mux.HandleFunc("GET /{id}", ErrorHandler(s.HandleGet))
+	mux.HandleFunc("GET /{id}/add/{sku}", ErrorHandler(s.HandleAddSku))
+	mux.HandleFunc("DELETE /{id}/{itemId}", ErrorHandler(s.HandleDeleteItem))
+	mux.HandleFunc("POST /{id}/delivery", ErrorHandler(s.HandleSetDelivery))
 	return mux
 }
--- a/proto/messages.pb.go
+++ b/proto/messages.pb.go
@@ -1,8 +1,8 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.35.1
-// 	protoc        v5.28.2
-// source: proto/messages.proto
+// 	protoc        v5.28.3
+// source: messages.proto

 package messages

@@ -25,12 +25,13 @@ type AddRequest struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields

-	Sku string `protobuf:"bytes,2,opt,name=Sku,proto3" json:"Sku,omitempty"`
+	Quantity int32  `protobuf:"varint,1,opt,name=Quantity,proto3" json:"Quantity,omitempty"`
+	Sku      string `protobuf:"bytes,2,opt,name=Sku,proto3" json:"Sku,omitempty"`
 }

 func (x *AddRequest) Reset() {
 	*x = AddRequest{}
-	mi := &file_proto_messages_proto_msgTypes[0]
+	mi := &file_messages_proto_msgTypes[0]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -42,7 +43,7 @@ func (x *AddRequest) String() string {
 func (*AddRequest) ProtoMessage() {}

 func (x *AddRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_messages_proto_msgTypes[0]
+	mi := &file_messages_proto_msgTypes[0]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -55,7 +56,14 @@ func (x *AddRequest) ProtoReflect() protoreflect.Message {

 // Deprecated: Use AddRequest.ProtoReflect.Descriptor instead.
 func (*AddRequest) Descriptor() ([]byte, []int) {
-	return file_proto_messages_proto_rawDescGZIP(), []int{0}
+	return file_messages_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *AddRequest) GetQuantity() int32 {
+	if x != nil {
+		return x.Quantity
+	}
+	return 0
 }

 func (x *AddRequest) GetSku() string {
@@ -79,7 +87,7 @@ type AddItem struct {

 func (x *AddItem) Reset() {
 	*x = AddItem{}
-	mi := &file_proto_messages_proto_msgTypes[1]
+	mi := &file_messages_proto_msgTypes[1]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -91,7 +99,7 @@ func (x *AddItem) String() string {
 func (*AddItem) ProtoMessage() {}

 func (x *AddItem) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_messages_proto_msgTypes[1]
+	mi := &file_messages_proto_msgTypes[1]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -104,7 +112,7 @@ func (x *AddItem) ProtoReflect() protoreflect.Message {

 // Deprecated: Use AddItem.ProtoReflect.Descriptor instead.
 func (*AddItem) Descriptor() ([]byte, []int) {
-	return file_proto_messages_proto_rawDescGZIP(), []int{1}
+	return file_messages_proto_rawDescGZIP(), []int{1}
 }

 func (x *AddItem) GetQuantity() int32 {
@@ -142,42 +150,256 @@ func (x *AddItem) GetImage() string {
 	return ""
 }

-var File_proto_messages_proto protoreflect.FileDescriptor
+type RemoveItem struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields

-var file_proto_messages_proto_rawDesc = []byte{
-	0x0a, 0x14, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x73,
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+	Id int64 `protobuf:"varint,1,opt,name=Id,proto3" json:"Id,omitempty"`
+}
+
+func (x *RemoveItem) Reset() {
+	*x = RemoveItem{}
+	mi := &file_messages_proto_msgTypes[2]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *RemoveItem) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*RemoveItem) ProtoMessage() {}
+
+func (x *RemoveItem) ProtoReflect() protoreflect.Message {
+	mi := &file_messages_proto_msgTypes[2]
+	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 RemoveItem.ProtoReflect.Descriptor instead.
+func (*RemoveItem) Descriptor() ([]byte, []int) {
+	return file_messages_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *RemoveItem) GetId() int64 {
+	if x != nil {
+		return x.Id
+	}
+	return 0
+}
+
+type ChangeQuantity struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Id       int64 `protobuf:"varint,1,opt,name=Id,proto3" json:"Id,omitempty"`
+	Quantity int32 `protobuf:"varint,2,opt,name=Quantity,proto3" json:"Quantity,omitempty"`
+}
+
+func (x *ChangeQuantity) Reset() {
+	*x = ChangeQuantity{}
+	mi := &file_messages_proto_msgTypes[3]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *ChangeQuantity) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ChangeQuantity) ProtoMessage() {}
+
+func (x *ChangeQuantity) ProtoReflect() protoreflect.Message {
+	mi := &file_messages_proto_msgTypes[3]
+	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 ChangeQuantity.ProtoReflect.Descriptor instead.
+func (*ChangeQuantity) Descriptor() ([]byte, []int) {
+	return file_messages_proto_rawDescGZIP(), []int{3}
+}
+
+func (x *ChangeQuantity) GetId() int64 {
+	if x != nil {
+		return x.Id
+	}
+	return 0
+}
+
+func (x *ChangeQuantity) GetQuantity() int32 {
+	if x != nil {
+		return x.Quantity
+	}
+	return 0
+}
+
+type SetDelivery struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Provider string  `protobuf:"bytes,1,opt,name=Provider,proto3" json:"Provider,omitempty"`
+	Items    []int64 `protobuf:"varint,2,rep,packed,name=Items,proto3" json:"Items,omitempty"`
+}
+
+func (x *SetDelivery) Reset() {
+	*x = SetDelivery{}
+	mi := &file_messages_proto_msgTypes[4]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *SetDelivery) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*SetDelivery) ProtoMessage() {}
+
+func (x *SetDelivery) ProtoReflect() protoreflect.Message {
+	mi := &file_messages_proto_msgTypes[4]
+	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 SetDelivery.ProtoReflect.Descriptor instead.
+func (*SetDelivery) Descriptor() ([]byte, []int) {
+	return file_messages_proto_rawDescGZIP(), []int{4}
+}
+
+func (x *SetDelivery) GetProvider() string {
+	if x != nil {
+		return x.Provider
+	}
+	return ""
+}
+
+func (x *SetDelivery) GetItems() []int64 {
+	if x != nil {
+		return x.Items
+	}
+	return nil
+}
+
+type RemoveDelivery struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Id int64 `protobuf:"varint,1,opt,name=Id,proto3" json:"Id,omitempty"`
+}
+
+func (x *RemoveDelivery) Reset() {
+	*x = RemoveDelivery{}
+	mi := &file_messages_proto_msgTypes[5]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *RemoveDelivery) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*RemoveDelivery) ProtoMessage() {}
+
+func (x *RemoveDelivery) ProtoReflect() protoreflect.Message {
+	mi := &file_messages_proto_msgTypes[5]
+	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 RemoveDelivery.ProtoReflect.Descriptor instead.
+func (*RemoveDelivery) Descriptor() ([]byte, []int) {
+	return file_messages_proto_rawDescGZIP(), []int{5}
+}
+
+func (x *RemoveDelivery) GetId() int64 {
+	if x != nil {
+		return x.Id
+	}
+	return 0
+}
+
+var File_messages_proto protoreflect.FileDescriptor
+
+var file_messages_proto_rawDesc = []byte{
+	0x0a, 0x0e, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x73, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f,
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+	0x52, 0x65, 0x6d, 0x6f, 0x76, 0x65, 0x44, 0x65, 0x6c, 0x69, 0x76, 0x65, 0x72, 0x79, 0x12, 0x0e,
+	0x0a, 0x02, 0x49, 0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x03, 0x52, 0x02, 0x49, 0x64, 0x42, 0x0c,
+	0x5a, 0x0a, 0x2e, 0x3b, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x73, 0x62, 0x06, 0x70, 0x72,
+	0x6f, 0x74, 0x6f, 0x33,
 }

 var (
-	file_proto_messages_proto_rawDescOnce sync.Once
-	file_proto_messages_proto_rawDescData = file_proto_messages_proto_rawDesc
+	file_messages_proto_rawDescOnce sync.Once
+	file_messages_proto_rawDescData = file_messages_proto_rawDesc
 )

-func file_proto_messages_proto_rawDescGZIP() []byte {
-	file_proto_messages_proto_rawDescOnce.Do(func() {
-		file_proto_messages_proto_rawDescData = protoimpl.X.CompressGZIP(file_proto_messages_proto_rawDescData)
+func file_messages_proto_rawDescGZIP() []byte {
+	file_messages_proto_rawDescOnce.Do(func() {
+		file_messages_proto_rawDescData = protoimpl.X.CompressGZIP(file_messages_proto_rawDescData)
 	})
-	return file_proto_messages_proto_rawDescData
+	return file_messages_proto_rawDescData
 }

-var file_proto_messages_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
-var file_proto_messages_proto_goTypes = []any{
-	(*AddRequest)(nil), // 0: messages.AddRequest
-	(*AddItem)(nil),    // 1: messages.AddItem
+var file_messages_proto_msgTypes = make([]protoimpl.MessageInfo, 6)
+var file_messages_proto_goTypes = []any{
+	(*AddRequest)(nil),     // 0: messages.AddRequest
+	(*AddItem)(nil),        // 1: messages.AddItem
+	(*RemoveItem)(nil),     // 2: messages.RemoveItem
+	(*ChangeQuantity)(nil), // 3: messages.ChangeQuantity
+	(*SetDelivery)(nil),    // 4: messages.SetDelivery
+	(*RemoveDelivery)(nil), // 5: messages.RemoveDelivery
 }
-var file_proto_messages_proto_depIdxs = []int32{
+var file_messages_proto_depIdxs = []int32{
 	0, // [0:0] is the sub-list for method output_type
 	0, // [0:0] is the sub-list for method input_type
 	0, // [0:0] is the sub-list for extension type_name
@@ -185,27 +407,27 @@ var file_proto_messages_proto_depIdxs = []int32{
 	0, // [0:0] is the sub-list for field type_name
 }

-func init() { file_proto_messages_proto_init() }
-func file_proto_messages_proto_init() {
-	if File_proto_messages_proto != nil {
+func init() { file_messages_proto_init() }
+func file_messages_proto_init() {
+	if File_messages_proto != nil {
 		return
 	}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
-			RawDescriptor: file_proto_messages_proto_rawDesc,
+			RawDescriptor: file_messages_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   2,
+			NumMessages:   6,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
-		GoTypes:           file_proto_messages_proto_goTypes,
-		DependencyIndexes: file_proto_messages_proto_depIdxs,
-		MessageInfos:      file_proto_messages_proto_msgTypes,
+		GoTypes:           file_messages_proto_goTypes,
+		DependencyIndexes: file_messages_proto_depIdxs,
+		MessageInfos:      file_messages_proto_msgTypes,
 	}.Build()
-	File_proto_messages_proto = out.File
-	file_proto_messages_proto_rawDesc = nil
-	file_proto_messages_proto_goTypes = nil
-	file_proto_messages_proto_depIdxs = nil
+	File_messages_proto = out.File
+	file_messages_proto_rawDesc = nil
+	file_messages_proto_goTypes = nil
+	file_messages_proto_depIdxs = nil
 }
--- a/proto/messages.proto
+++ b/proto/messages.proto
@@ -3,6 +3,7 @@ package messages;
 option go_package = ".;messages";

 message AddRequest {
+		int32 Quantity = 1;
 		string Sku = 2;
 }

@@ -14,12 +15,13 @@ message AddItem {
 		string Image = 6;
 }

-message RemoteItem {
+message RemoveItem {
 		int64 Id = 1;
 }

 message ChangeQuantity {
-		int32 Quantity = 1;
+		int64 Id = 1;
+		int32 Quantity = 2;
 }

 message SetDelivery {
--- a/proto/service.proto
+++ b/proto/service.proto