add breadcrumbs

Makefile

@@ -8,3 +8,6 @@ generate:
       --grpc-gateway_out ./proto --grpc-gateway_opt paths=source_relative \
       --swagger_out=allow_merge=true,merge_file_name=main:./proto \
       ./api/main.proto
+
+run:
+	go run ./cmd/cake_crm/main.go

api/main.proto

@@ -22,6 +22,11 @@ service CRM {
       get: "/products/{id}"
     };
   }
+  rpc GetBreadcrumbs(GetBreadcrumbsReq) returns (BreadcrumbsRsp) {
+    option (google.api.http) = {
+      get: "/breadcrumbs/{id}"
+    };
+  }
 }
 
 message GetCatalogReq {}
@@ -88,3 +93,11 @@ message GetProductReq{
 message ProductRsp {
   Product product = 1;
 }
+
+message GetBreadcrumbsReq {
+  int64 id = 1;
+}
+
+message BreadcrumbsRsp {
+  repeated Category categories = 1;
+}

internal/app/server.go

@@ -40,3 +40,11 @@ func (s *Server) GetProduct(ctx context.Context, req *crm.GetProductReq) (*crm.P
 	}
 	return &crm.ProductRsp{Product: product}, nil
 }
+
+func (s *Server) GetBreadcrumbs(ctx context.Context, req *crm.GetBreadcrumbsReq) (*crm.BreadcrumbsRsp, error) {
+	breadcrumbs, err := s.storage.GetBreadcrumbs(ctx, req.Id)
+	if err != nil {
+		return nil, err
+	}
+	return &crm.BreadcrumbsRsp{Categories: breadcrumbs}, nil
+}

internal/models/storage/interface.go

@@ -5,19 +5,9 @@ import (
 	"context"
 )
 
-type Product struct {
-	ID   int    `json:"id"`
-	Name string `json:"name"`
-	// todo
-}
-
-type Breadcrumb struct {
-	Name string `json:"name"`
-	URL  string `json:"url"`
-}
-
 type IStorage interface {
 	GetCatalog(ctx context.Context) ([]*crm.Category, error)
 	GetPositions(ctx context.Context, id int64) ([]*crm.Product, error)
 	GetProduct(ctx context.Context, id int64) (*crm.Product, error)
+	GetBreadcrumbs(ctx context.Context, id int64) ([]*crm.Category, error)
 }

internal/models/storage/storage_file/storage.go

@@ -65,3 +65,33 @@ func (s *storageFile) GetProduct(_ context.Context, id int64) (*crm.Product, err
 	}
 	return nil, ErrProductNotFound
 }
+
+func (s *storageFile) GetBreadcrumbs(_ context.Context, id int64) ([]*crm.Category, error) {
+	data, err := os.ReadFile("resources/catalog.json")
+	if err != nil {
+		return nil, err
+	}
+	var categories []*crm.Category
+	if err := json.Unmarshal(data, &categories); err != nil {
+		return nil, err
+	}
+	return getBreadcrumbs(categories, id), nil
+}
+
+func getBreadcrumbs(categories []*crm.Category, id int64) []*crm.Category {
+	for _, category := range categories {
+		if category.Id == id {
+			category.Children = nil
+			return []*crm.Category{category}
+		}
+		breadcrumbs := getBreadcrumbs(category.Children, id)
+		if len(breadcrumbs) != 0 {
+			res := make([]*crm.Category, 0, len(breadcrumbs)+1)
+			category.Children = nil
+			res = append(res, category)
+			res = append(res, breadcrumbs...)
+			return res
+		}
+	}
+	return nil
+}

proto/main.pb.go

@@ -728,6 +728,100 @@ func (x *ProductRsp) GetProduct() *Product {
 	return nil
 }
 
+type GetBreadcrumbsReq struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Id int64 `protobuf:"varint,1,opt,name=id,proto3" json:"id,omitempty"`
+}
+
+func (x *GetBreadcrumbsReq) Reset() {
+	*x = GetBreadcrumbsReq{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_main_proto_msgTypes[12]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *GetBreadcrumbsReq) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*GetBreadcrumbsReq) ProtoMessage() {}
+
+func (x *GetBreadcrumbsReq) ProtoReflect() protoreflect.Message {
+	mi := &file_main_proto_msgTypes[12]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use GetBreadcrumbsReq.ProtoReflect.Descriptor instead.
+func (*GetBreadcrumbsReq) Descriptor() ([]byte, []int) {
+	return file_main_proto_rawDescGZIP(), []int{12}
+}
+
+func (x *GetBreadcrumbsReq) GetId() int64 {
+	if x != nil {
+		return x.Id
+	}
+	return 0
+}
+
+type BreadcrumbsRsp struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Categories []*Category `protobuf:"bytes,1,rep,name=categories,proto3" json:"categories,omitempty"`
+}
+
+func (x *BreadcrumbsRsp) Reset() {
+	*x = BreadcrumbsRsp{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_main_proto_msgTypes[13]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *BreadcrumbsRsp) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*BreadcrumbsRsp) ProtoMessage() {}
+
+func (x *BreadcrumbsRsp) ProtoReflect() protoreflect.Message {
+	mi := &file_main_proto_msgTypes[13]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use BreadcrumbsRsp.ProtoReflect.Descriptor instead.
+func (*BreadcrumbsRsp) Descriptor() ([]byte, []int) {
+	return file_main_proto_rawDescGZIP(), []int{13}
+}
+
+func (x *BreadcrumbsRsp) GetCategories() []*Category {
+	if x != nil {
+		return x.Categories
+	}
+	return nil
+}
+
 var File_main_proto protoreflect.FileDescriptor
 
 var file_main_proto_rawDesc = []byte{
@@ -802,25 +896,38 @@ var file_main_proto_rawDesc = []byte{
 	0x52, 0x73, 0x70, 0x12, 0x2c, 0x0a, 0x07, 0x70, 0x72, 0x6f, 0x64, 0x75, 0x63, 0x74, 0x18, 0x01,
 	0x20, 0x01, 0x28, 0x0b, 0x32, 0x12, 0x2e, 0x63, 0x72, 0x61, 0x62, 0x73, 0x2e, 0x63, 0x72, 0x6d,
 	0x2e, 0x50, 0x72, 0x6f, 0x64, 0x75, 0x63, 0x74, 0x52, 0x07, 0x70, 0x72, 0x6f, 0x64, 0x75, 0x63,
-	0x74, 0x32, 0x8b, 0x02, 0x0a, 0x03, 0x43, 0x52, 0x4d, 0x12, 0x4f, 0x0a, 0x0a, 0x47, 0x65, 0x74,
+	0x74, 0x22, 0x23, 0x0a, 0x11, 0x47, 0x65, 0x74, 0x42, 0x72, 0x65, 0x61, 0x64, 0x63, 0x72, 0x75,
-	0x43, 0x61, 0x74, 0x61, 0x6c, 0x6f, 0x67, 0x12, 0x18, 0x2e, 0x63, 0x72, 0x61, 0x62, 0x73, 0x2e,
+	0x6d, 0x62, 0x73, 0x52, 0x65, 0x71, 0x12, 0x0e, 0x0a, 0x02, 0x69, 0x64, 0x18, 0x01, 0x20, 0x01,
-	0x63, 0x72, 0x6d, 0x2e, 0x47, 0x65, 0x74, 0x43, 0x61, 0x74, 0x61, 0x6c, 0x6f, 0x67, 0x52, 0x65,
+	0x28, 0x03, 0x52, 0x02, 0x69, 0x64, 0x22, 0x45, 0x0a, 0x0e, 0x42, 0x72, 0x65, 0x61, 0x64, 0x63,
-	0x71, 0x1a, 0x15, 0x2e, 0x63, 0x72, 0x61, 0x62, 0x73, 0x2e, 0x63, 0x72, 0x6d, 0x2e, 0x43, 0x61,
+	0x72, 0x75, 0x6d, 0x62, 0x73, 0x52, 0x73, 0x70, 0x12, 0x33, 0x0a, 0x0a, 0x63, 0x61, 0x74, 0x65,
-	0x74, 0x61, 0x6c, 0x6f, 0x67, 0x52, 0x73, 0x70, 0x22, 0x10, 0x82, 0xd3, 0xe4, 0x93, 0x02, 0x0a,
+	0x67, 0x6f, 0x72, 0x69, 0x65, 0x73, 0x18, 0x01, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x13, 0x2e, 0x63,
-	0x12, 0x08, 0x2f, 0x63, 0x61, 0x74, 0x61, 0x6c, 0x6f, 0x67, 0x12, 0x5c, 0x0a, 0x0c, 0x47, 0x65,
+	0x72, 0x61, 0x62, 0x73, 0x2e, 0x63, 0x72, 0x6d, 0x2e, 0x43, 0x61, 0x74, 0x65, 0x67, 0x6f, 0x72,
-	0x74, 0x50, 0x6f, 0x73, 0x69, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x12, 0x1a, 0x2e, 0x63, 0x72, 0x61,
+	0x79, 0x52, 0x0a, 0x63, 0x61, 0x74, 0x65, 0x67, 0x6f, 0x72, 0x69, 0x65, 0x73, 0x32, 0xf1, 0x02,
-	0x62, 0x73, 0x2e, 0x63, 0x72, 0x6d, 0x2e, 0x47, 0x65, 0x74, 0x50, 0x6f, 0x73, 0x69, 0x74, 0x69,
+	0x0a, 0x03, 0x43, 0x52, 0x4d, 0x12, 0x4f, 0x0a, 0x0a, 0x47, 0x65, 0x74, 0x43, 0x61, 0x74, 0x61,
-	0x6f, 0x6e, 0x73, 0x52, 0x65, 0x71, 0x1a, 0x17, 0x2e, 0x63, 0x72, 0x61, 0x62, 0x73, 0x2e, 0x63,
+	0x6c, 0x6f, 0x67, 0x12, 0x18, 0x2e, 0x63, 0x72, 0x61, 0x62, 0x73, 0x2e, 0x63, 0x72, 0x6d, 0x2e,
-	0x72, 0x6d, 0x2e, 0x50, 0x6f, 0x73, 0x69, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x52, 0x73, 0x70, 0x22,
+	0x47, 0x65, 0x74, 0x43, 0x61, 0x74, 0x61, 0x6c, 0x6f, 0x67, 0x52, 0x65, 0x71, 0x1a, 0x15, 0x2e,
-	0x17, 0x82, 0xd3, 0xe4, 0x93, 0x02, 0x11, 0x12, 0x0f, 0x2f, 0x70, 0x6f, 0x73, 0x69, 0x74, 0x69,
+	0x63, 0x72, 0x61, 0x62, 0x73, 0x2e, 0x63, 0x72, 0x6d, 0x2e, 0x43, 0x61, 0x74, 0x61, 0x6c, 0x6f,
-	0x6f, 0x6e, 0x73, 0x2f, 0x7b, 0x69, 0x64, 0x7d, 0x12, 0x55, 0x0a, 0x0a, 0x47, 0x65, 0x74, 0x50,
+	0x67, 0x52, 0x73, 0x70, 0x22, 0x10, 0x82, 0xd3, 0xe4, 0x93, 0x02, 0x0a, 0x12, 0x08, 0x2f, 0x63,
-	0x72, 0x6f, 0x64, 0x75, 0x63, 0x74, 0x12, 0x18, 0x2e, 0x63, 0x72, 0x61, 0x62, 0x73, 0x2e, 0x63,
+	0x61, 0x74, 0x61, 0x6c, 0x6f, 0x67, 0x12, 0x5c, 0x0a, 0x0c, 0x47, 0x65, 0x74, 0x50, 0x6f, 0x73,
-	0x72, 0x6d, 0x2e, 0x47, 0x65, 0x74, 0x50, 0x72, 0x6f, 0x64, 0x75, 0x63, 0x74, 0x52, 0x65, 0x71,
+	0x69, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x12, 0x1a, 0x2e, 0x63, 0x72, 0x61, 0x62, 0x73, 0x2e, 0x63,
-	0x1a, 0x15, 0x2e, 0x63, 0x72, 0x61, 0x62, 0x73, 0x2e, 0x63, 0x72, 0x6d, 0x2e, 0x50, 0x72, 0x6f,
+	0x72, 0x6d, 0x2e, 0x47, 0x65, 0x74, 0x50, 0x6f, 0x73, 0x69, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x52,
-	0x64, 0x75, 0x63, 0x74, 0x52, 0x73, 0x70, 0x22, 0x16, 0x82, 0xd3, 0xe4, 0x93, 0x02, 0x10, 0x12,
+	0x65, 0x71, 0x1a, 0x17, 0x2e, 0x63, 0x72, 0x61, 0x62, 0x73, 0x2e, 0x63, 0x72, 0x6d, 0x2e, 0x50,
-	0x0e, 0x2f, 0x70, 0x72, 0x6f, 0x64, 0x75, 0x63, 0x74, 0x73, 0x2f, 0x7b, 0x69, 0x64, 0x7d, 0x42,
+	0x6f, 0x73, 0x69, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x52, 0x73, 0x70, 0x22, 0x17, 0x82, 0xd3, 0xe4,
-	0x09, 0x5a, 0x07, 0x70, 0x6b, 0x67, 0x2f, 0x63, 0x72, 0x6d, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74,
+	0x93, 0x02, 0x11, 0x12, 0x0f, 0x2f, 0x70, 0x6f, 0x73, 0x69, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x2f,
-	0x6f, 0x33,
+	0x7b, 0x69, 0x64, 0x7d, 0x12, 0x55, 0x0a, 0x0a, 0x47, 0x65, 0x74, 0x50, 0x72, 0x6f, 0x64, 0x75,
+	0x63, 0x74, 0x12, 0x18, 0x2e, 0x63, 0x72, 0x61, 0x62, 0x73, 0x2e, 0x63, 0x72, 0x6d, 0x2e, 0x47,
+	0x65, 0x74, 0x50, 0x72, 0x6f, 0x64, 0x75, 0x63, 0x74, 0x52, 0x65, 0x71, 0x1a, 0x15, 0x2e, 0x63,
+	0x72, 0x61, 0x62, 0x73, 0x2e, 0x63, 0x72, 0x6d, 0x2e, 0x50, 0x72, 0x6f, 0x64, 0x75, 0x63, 0x74,
+	0x52, 0x73, 0x70, 0x22, 0x16, 0x82, 0xd3, 0xe4, 0x93, 0x02, 0x10, 0x12, 0x0e, 0x2f, 0x70, 0x72,
+	0x6f, 0x64, 0x75, 0x63, 0x74, 0x73, 0x2f, 0x7b, 0x69, 0x64, 0x7d, 0x12, 0x64, 0x0a, 0x0e, 0x47,
+	0x65, 0x74, 0x42, 0x72, 0x65, 0x61, 0x64, 0x63, 0x72, 0x75, 0x6d, 0x62, 0x73, 0x12, 0x1c, 0x2e,
+	0x63, 0x72, 0x61, 0x62, 0x73, 0x2e, 0x63, 0x72, 0x6d, 0x2e, 0x47, 0x65, 0x74, 0x42, 0x72, 0x65,
+	0x61, 0x64, 0x63, 0x72, 0x75, 0x6d, 0x62, 0x73, 0x52, 0x65, 0x71, 0x1a, 0x19, 0x2e, 0x63, 0x72,
+	0x61, 0x62, 0x73, 0x2e, 0x63, 0x72, 0x6d, 0x2e, 0x42, 0x72, 0x65, 0x61, 0x64, 0x63, 0x72, 0x75,
+	0x6d, 0x62, 0x73, 0x52, 0x73, 0x70, 0x22, 0x19, 0x82, 0xd3, 0xe4, 0x93, 0x02, 0x13, 0x12, 0x11,
+	0x2f, 0x62, 0x72, 0x65, 0x61, 0x64, 0x63, 0x72, 0x75, 0x6d, 0x62, 0x73, 0x2f, 0x7b, 0x69, 0x64,
+	0x7d, 0x42, 0x09, 0x5a, 0x07, 0x70, 0x6b, 0x67, 0x2f, 0x63, 0x72, 0x6d, 0x62, 0x06, 0x70, 0x72,
+	0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -835,7 +942,7 @@ func file_main_proto_rawDescGZIP() []byte {
 	return file_main_proto_rawDescData
 }
 
-var file_main_proto_msgTypes = make([]protoimpl.MessageInfo, 12)
+var file_main_proto_msgTypes = make([]protoimpl.MessageInfo, 14)
 var file_main_proto_goTypes = []interface{}{
 	(*GetCatalogReq)(nil),     // 0: crabs.crm.GetCatalogReq
 	(*CatalogRsp)(nil),        // 1: crabs.crm.CatalogRsp
@@ -849,6 +956,8 @@ var file_main_proto_goTypes = []interface{}{
 	(*Characteristic)(nil),    // 9: crabs.crm.Characteristic
 	(*GetProductReq)(nil),     // 10: crabs.crm.GetProductReq
 	(*ProductRsp)(nil),        // 11: crabs.crm.ProductRsp
+	(*GetBreadcrumbsReq)(nil), // 12: crabs.crm.GetBreadcrumbsReq
+	(*BreadcrumbsRsp)(nil),    // 13: crabs.crm.BreadcrumbsRsp
 }
 var file_main_proto_depIdxs = []int32{
 	2,  // 0: crabs.crm.CatalogRsp.categories:type_name -> crabs.crm.Category
@@ -859,17 +968,20 @@ var file_main_proto_depIdxs = []int32{
 	9,  // 5: crabs.crm.Product.characteristics:type_name -> crabs.crm.Characteristic
 	8,  // 6: crabs.crm.Variant.properties:type_name -> crabs.crm.Property
 	5,  // 7: crabs.crm.ProductRsp.product:type_name -> crabs.crm.Product
-	0,  // 8: crabs.crm.CRM.GetCatalog:input_type -> crabs.crm.GetCatalogReq
+	2,  // 8: crabs.crm.BreadcrumbsRsp.categories:type_name -> crabs.crm.Category
-	3,  // 9: crabs.crm.CRM.GetPositions:input_type -> crabs.crm.GetPositionsReq
+	0,  // 9: crabs.crm.CRM.GetCatalog:input_type -> crabs.crm.GetCatalogReq
-	10, // 10: crabs.crm.CRM.GetProduct:input_type -> crabs.crm.GetProductReq
+	3,  // 10: crabs.crm.CRM.GetPositions:input_type -> crabs.crm.GetPositionsReq
-	1,  // 11: crabs.crm.CRM.GetCatalog:output_type -> crabs.crm.CatalogRsp
+	10, // 11: crabs.crm.CRM.GetProduct:input_type -> crabs.crm.GetProductReq
-	4,  // 12: crabs.crm.CRM.GetPositions:output_type -> crabs.crm.PositionsRsp
+	12, // 12: crabs.crm.CRM.GetBreadcrumbs:input_type -> crabs.crm.GetBreadcrumbsReq
-	11, // 13: crabs.crm.CRM.GetProduct:output_type -> crabs.crm.ProductRsp
+	1,  // 13: crabs.crm.CRM.GetCatalog:output_type -> crabs.crm.CatalogRsp
-	11, // [11:14] is the sub-list for method output_type
+	4,  // 14: crabs.crm.CRM.GetPositions:output_type -> crabs.crm.PositionsRsp
-	8,  // [8:11] is the sub-list for method input_type
+	11, // 15: crabs.crm.CRM.GetProduct:output_type -> crabs.crm.ProductRsp
-	8,  // [8:8] is the sub-list for extension type_name
+	13, // 16: crabs.crm.CRM.GetBreadcrumbs:output_type -> crabs.crm.BreadcrumbsRsp
-	8,  // [8:8] is the sub-list for extension extendee
+	13, // [13:17] is the sub-list for method output_type
-	0,  // [0:8] is the sub-list for field type_name
+	9,  // [9:13] is the sub-list for method input_type
+	9,  // [9:9] is the sub-list for extension type_name
+	9,  // [9:9] is the sub-list for extension extendee
+	0,  // [0:9] is the sub-list for field type_name
 }
 
 func init() { file_main_proto_init() }
@@ -1022,6 +1134,30 @@ func file_main_proto_init() {
 				return nil
 			}
 		}
+		file_main_proto_msgTypes[12].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*GetBreadcrumbsReq); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_main_proto_msgTypes[13].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*BreadcrumbsRsp); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
 	}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
@@ -1029,7 +1165,7 @@ func file_main_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_main_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   12,
+			NumMessages:   14,
 			NumExtensions: 0,
 			NumServices:   1,
 		},

proto/main.pb.gw.go

@@ -153,6 +153,58 @@ func local_request_CRM_GetProduct_0(ctx context.Context, marshaler runtime.Marsh
 
 }
 
+func request_CRM_GetBreadcrumbs_0(ctx context.Context, marshaler runtime.Marshaler, client CRMClient, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var protoReq GetBreadcrumbsReq
+	var metadata runtime.ServerMetadata
+
+	var (
+		val string
+		ok  bool
+		err error
+		_   = err
+	)
+
+	val, ok = pathParams["id"]
+	if !ok {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "missing parameter %s", "id")
+	}
+
+	protoReq.Id, err = runtime.Int64(val)
+	if err != nil {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "type mismatch, parameter: %s, error: %v", "id", err)
+	}
+
+	msg, err := client.GetBreadcrumbs(ctx, &protoReq, grpc.Header(&metadata.HeaderMD), grpc.Trailer(&metadata.TrailerMD))
+	return msg, metadata, err
+
+}
+
+func local_request_CRM_GetBreadcrumbs_0(ctx context.Context, marshaler runtime.Marshaler, server CRMServer, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var protoReq GetBreadcrumbsReq
+	var metadata runtime.ServerMetadata
+
+	var (
+		val string
+		ok  bool
+		err error
+		_   = err
+	)
+
+	val, ok = pathParams["id"]
+	if !ok {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "missing parameter %s", "id")
+	}
+
+	protoReq.Id, err = runtime.Int64(val)
+	if err != nil {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "type mismatch, parameter: %s, error: %v", "id", err)
+	}
+
+	msg, err := server.GetBreadcrumbs(ctx, &protoReq)
+	return msg, metadata, err
+
+}
+
 // RegisterCRMHandlerServer registers the http handlers for service CRM to "mux".
 // UnaryRPC     :call CRMServer directly.
 // StreamingRPC :currently unsupported pending https://github.com/grpc/grpc-go/issues/906.
@@ -234,6 +286,31 @@ func RegisterCRMHandlerServer(ctx context.Context, mux *runtime.ServeMux, server
 
 	})
 
+	mux.Handle("GET", pattern_CRM_GetBreadcrumbs_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		var stream runtime.ServerTransportStream
+		ctx = grpc.NewContextWithServerTransportStream(ctx, &stream)
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		var err error
+		var annotatedContext context.Context
+		annotatedContext, err = runtime.AnnotateIncomingContext(ctx, mux, req, "/crabs.crm.CRM/GetBreadcrumbs", runtime.WithHTTPPathPattern("/breadcrumbs/{id}"))
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := local_request_CRM_GetBreadcrumbs_0(annotatedContext, inboundMarshaler, server, req, pathParams)
+		md.HeaderMD, md.TrailerMD = metadata.Join(md.HeaderMD, stream.Header()), metadata.Join(md.TrailerMD, stream.Trailer())
+		annotatedContext = runtime.NewServerMetadataContext(annotatedContext, md)
+		if err != nil {
+			runtime.HTTPError(annotatedContext, mux, outboundMarshaler, w, req, err)
+			return
+		}
+
+		forward_CRM_GetBreadcrumbs_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+
+	})
+
 	return nil
 }
 
@@ -341,6 +418,28 @@ func RegisterCRMHandlerClient(ctx context.Context, mux *runtime.ServeMux, client
 
 	})
 
+	mux.Handle("GET", pattern_CRM_GetBreadcrumbs_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		var err error
+		var annotatedContext context.Context
+		annotatedContext, err = runtime.AnnotateContext(ctx, mux, req, "/crabs.crm.CRM/GetBreadcrumbs", runtime.WithHTTPPathPattern("/breadcrumbs/{id}"))
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := request_CRM_GetBreadcrumbs_0(annotatedContext, inboundMarshaler, client, req, pathParams)
+		annotatedContext = runtime.NewServerMetadataContext(annotatedContext, md)
+		if err != nil {
+			runtime.HTTPError(annotatedContext, mux, outboundMarshaler, w, req, err)
+			return
+		}
+
+		forward_CRM_GetBreadcrumbs_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+
+	})
+
 	return nil
 }
 
@@ -350,6 +449,8 @@ var (
 	pattern_CRM_GetPositions_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 1, 0, 4, 1, 5, 1}, []string{"positions", "id"}, ""))
 
 	pattern_CRM_GetProduct_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 1, 0, 4, 1, 5, 1}, []string{"products", "id"}, ""))
+
+	pattern_CRM_GetBreadcrumbs_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 1, 0, 4, 1, 5, 1}, []string{"breadcrumbs", "id"}, ""))
 )
 
 var (
@@ -358,4 +459,6 @@ var (
 	forward_CRM_GetPositions_0 = runtime.ForwardResponseMessage
 
 	forward_CRM_GetProduct_0 = runtime.ForwardResponseMessage
+
+	forward_CRM_GetBreadcrumbs_0 = runtime.ForwardResponseMessage
 )

proto/main.swagger.json

@@ -11,6 +11,37 @@
     "application/json"
   ],
   "paths": {
+    "/breadcrumbs/{id}": {
+      "get": {
+        "operationId": "CRM_GetBreadcrumbs",
+        "responses": {
+          "200": {
+            "description": "A successful response.",
+            "schema": {
+              "$ref": "#/definitions/crmBreadcrumbsRsp"
+            }
+          },
+          "default": {
+            "description": "An unexpected error response.",
+            "schema": {
+              "$ref": "#/definitions/runtimeError"
+            }
+          }
+        },
+        "parameters": [
+          {
+            "name": "id",
+            "in": "path",
+            "required": true,
+            "type": "string",
+            "format": "int64"
+          }
+        ],
+        "tags": [
+          "CRM"
+        ]
+      }
+    },
     "/catalog": {
       "get": {
         "operationId": "CRM_GetCatalog",
@@ -97,6 +128,17 @@
     }
   },
   "definitions": {
+    "crmBreadcrumbsRsp": {
+      "type": "object",
+      "properties": {
+        "categories": {
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/crmCategory"
+          }
+        }
+      }
+    },
     "crmCatalogRsp": {
       "type": "object",
       "properties": {

proto/main_grpc.pb.go

@@ -22,6 +22,7 @@ const (
 	CRM_GetCatalog_FullMethodName     = "/crabs.crm.CRM/GetCatalog"
 	CRM_GetPositions_FullMethodName   = "/crabs.crm.CRM/GetPositions"
 	CRM_GetProduct_FullMethodName     = "/crabs.crm.CRM/GetProduct"
+	CRM_GetBreadcrumbs_FullMethodName = "/crabs.crm.CRM/GetBreadcrumbs"
 )
 
 // CRMClient is the client API for CRM service.
@@ -31,6 +32,7 @@ type CRMClient interface {
 	GetCatalog(ctx context.Context, in *GetCatalogReq, opts ...grpc.CallOption) (*CatalogRsp, error)
 	GetPositions(ctx context.Context, in *GetPositionsReq, opts ...grpc.CallOption) (*PositionsRsp, error)
 	GetProduct(ctx context.Context, in *GetProductReq, opts ...grpc.CallOption) (*ProductRsp, error)
+	GetBreadcrumbs(ctx context.Context, in *GetBreadcrumbsReq, opts ...grpc.CallOption) (*BreadcrumbsRsp, error)
 }
 
 type cRMClient struct {
@@ -68,6 +70,15 @@ func (c *cRMClient) GetProduct(ctx context.Context, in *GetProductReq, opts ...g
 	return out, nil
 }
 
+func (c *cRMClient) GetBreadcrumbs(ctx context.Context, in *GetBreadcrumbsReq, opts ...grpc.CallOption) (*BreadcrumbsRsp, error) {
+	out := new(BreadcrumbsRsp)
+	err := c.cc.Invoke(ctx, CRM_GetBreadcrumbs_FullMethodName, in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // CRMServer is the server API for CRM service.
 // All implementations must embed UnimplementedCRMServer
 // for forward compatibility
@@ -75,6 +86,7 @@ type CRMServer interface {
 	GetCatalog(context.Context, *GetCatalogReq) (*CatalogRsp, error)
 	GetPositions(context.Context, *GetPositionsReq) (*PositionsRsp, error)
 	GetProduct(context.Context, *GetProductReq) (*ProductRsp, error)
+	GetBreadcrumbs(context.Context, *GetBreadcrumbsReq) (*BreadcrumbsRsp, error)
 	mustEmbedUnimplementedCRMServer()
 }
 
@@ -91,6 +103,9 @@ func (UnimplementedCRMServer) GetPositions(context.Context, *GetPositionsReq) (*
 func (UnimplementedCRMServer) GetProduct(context.Context, *GetProductReq) (*ProductRsp, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method GetProduct not implemented")
 }
+func (UnimplementedCRMServer) GetBreadcrumbs(context.Context, *GetBreadcrumbsReq) (*BreadcrumbsRsp, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetBreadcrumbs not implemented")
+}
 func (UnimplementedCRMServer) mustEmbedUnimplementedCRMServer() {}
 
 // UnsafeCRMServer may be embedded to opt out of forward compatibility for this service.
@@ -158,6 +173,24 @@ func _CRM_GetProduct_Handler(srv interface{}, ctx context.Context, dec func(inte
 	return interceptor(ctx, in, info, handler)
 }
 
+func _CRM_GetBreadcrumbs_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetBreadcrumbsReq)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(CRMServer).GetBreadcrumbs(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: CRM_GetBreadcrumbs_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(CRMServer).GetBreadcrumbs(ctx, req.(*GetBreadcrumbsReq))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 // CRM_ServiceDesc is the grpc.ServiceDesc for CRM service.
 // It's only intended for direct use with grpc.RegisterService,
 // and not to be introspected or modified (even as a copy)
@@ -177,6 +210,10 @@ var CRM_ServiceDesc = grpc.ServiceDesc{
 			MethodName: "GetProduct",
 			Handler:    _CRM_GetProduct_Handler,
 		},
+		{
+			MethodName: "GetBreadcrumbs",
+			Handler:    _CRM_GetBreadcrumbs_Handler,
+		},
 	},
 	Streams:  []grpc.StreamDesc{},
 	Metadata: "main.proto",