add products

internal/app/server.go

@@ -32,3 +32,11 @@ func (s *Server) GetPositions(ctx context.Context, req *crm.GetPositionsReq) (*c
 	}
 	return &crm.PositionsRsp{Products: products}, nil
 }
+
+func (s *Server) GetProduct(ctx context.Context, req *crm.GetProductReq) (*crm.ProductRsp, error) {
+	product, err := s.storage.GetProduct(ctx, req.Id)
+	if err != nil {
+		return nil, err
+	}
+	return &crm.ProductRsp{Product: product}, nil
+}

internal/models/storage/interface.go

@@ -19,4 +19,5 @@ type Breadcrumb struct {
 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)
 }

internal/models/storage/storage_file/storage.go

@@ -5,9 +5,14 @@ import (
 	crm "cake_crm/proto"
 	"context"
 	"encoding/json"
+	"errors"
 	"os"
 )
 
+var (
+	ErrProductNotFound = errors.New("product not found")
+)
+
 type storageFile struct{}
 
 func NewStorageFile() storage.IStorage {
@@ -43,3 +48,20 @@ func (s *storageFile) GetPositions(_ context.Context, id int64) ([]*crm.Product,
 	}
 	return res, nil
 }
+
+func (s *storageFile) GetProduct(_ context.Context, id int64) (*crm.Product, error) {
+	data, err := os.ReadFile("resources/products.json")
+	if err != nil {
+		return nil, err
+	}
+	var products []*crm.Product
+	if err := json.Unmarshal(data, &products); err != nil {
+		return nil, err
+	}
+	for _, product := range products {
+		if product.Id == id {
+			return product, nil
+		}
+	}
+	return nil, ErrProductNotFound
+}