add cache

internal/modules/storage/storage_file/storage.go

@@ -6,8 +6,11 @@ import (
 	"context"
 	"encoding/json"
 	"errors"
+	"fmt"
+	"github.com/patrickmn/go-cache"
 	"os"
 	"strings"
+	"time"
 )
 
 type Product struct {
@@ -30,14 +33,18 @@ var (
 	ErrProductNotFound = errors.New("product not found")
 )
 
-type storageFile struct{}
+type storageFile struct {
+	cache *cache.Cache
+}
 
 func NewStorageFile() storage.IStorage {
-	return &storageFile{}
+	return &storageFile{
+		cache: cache.New(24*time.Hour, time.Hour),
+	}
 }
 
 func (s *storageFile) GetCatalog(_ context.Context) ([]*crm.Category, error) {
-	data, err := os.ReadFile("resources/catalog.json")
+	data, err := s.readFile("catalog")
 	if err != nil {
 		return nil, err
 	}
@@ -49,7 +56,7 @@ func (s *storageFile) GetCatalog(_ context.Context) ([]*crm.Category, error) {
 }
 
 func (s *storageFile) GetPositions(_ context.Context, id int64) ([]*crm.Product, error) {
-	data, err := os.ReadFile("resources/products.json")
+	data, err := s.readFile("products")
 	if err != nil {
 		return nil, err
 	}
@@ -68,7 +75,7 @@ func (s *storageFile) GetPositions(_ context.Context, id int64) ([]*crm.Product,
 }
 
 func (s *storageFile) GetProduct(_ context.Context, id int64) (*crm.Product, error) {
-	data, err := os.ReadFile("resources/products.json")
+	data, err := s.readFile("products")
 	if err != nil {
 		return nil, err
 	}
@@ -123,7 +130,7 @@ func (s *storageFile) GetBreadcrumbs(ctx context.Context, id int64) ([]*crm.Cate
 	if err != nil {
 		return nil, err
 	}
-	data, err := os.ReadFile("resources/catalog.json")
+	data, err := s.readFile("catalog")
 	if err != nil {
 		return nil, err
 	}
@@ -163,7 +170,7 @@ func getBreadcrumbs(categories []*crm.Category, id int64) []*crm.Category {
 }
 
 func (s *storageFile) GetPositionsByText(_ context.Context, text string) ([]*crm.Product, error) {
-	data, err := os.ReadFile("resources/products.json")
+	data, err := s.readFile("products")
 	if err != nil {
 		return nil, err
 	}
@@ -182,3 +189,16 @@ func (s *storageFile) GetPositionsByText(_ context.Context, text string) ([]*crm
 	}
 	return res, nil
 }
+
+func (s *storageFile) readFile(name string) ([]byte, error) {
+	cacheData, found := s.cache.Get(name)
+	if found {
+		return cacheData.([]byte), nil
+	}
+	data, err := os.ReadFile(fmt.Sprintf("resources/%s.json", name))
+	if err != nil {
+		return nil, err
+	}
+	s.cache.Set(name, data, cache.DefaultExpiration)
+	return data, nil
+}