update cart

pkg/backofficeadmin/fileserver.go

@@ -219,8 +219,15 @@ func (fs *FileServer) PromotionsHandler(w http.ResponseWriter, r *http.Request)
 	if r.Method == http.MethodGet {
 		file, err := os.Open(fileName)
 		if err != nil {
-			writeJSON(w, http.StatusInternalServerError, map[string]string{"error": err.Error()})
-			return
+			if os.IsNotExist(err) {
+				_ = os.MkdirAll(filepath.Dir(fileName), 0755)
+				_ = os.WriteFile(fileName, []byte("{}"), 0644)
+				file, err = os.Open(fileName)
+			}
+			if err != nil {
+				writeJSON(w, http.StatusInternalServerError, map[string]string{"error": err.Error()})
+				return
+			}
 		}
 		defer file.Close()
 
@@ -228,6 +235,7 @@ func (fs *FileServer) PromotionsHandler(w http.ResponseWriter, r *http.Request)
 		return
 	}
 	if r.Method == http.MethodPost {
+		_ = os.MkdirAll(filepath.Dir(fileName), 0755)
 		file, err := os.Create(fileName)
 		if err != nil {
 			writeJSON(w, http.StatusInternalServerError, map[string]string{"error": err.Error()})
@@ -247,8 +255,15 @@ func (fs *FileServer) VoucherHandler(w http.ResponseWriter, r *http.Request) {
 	if r.Method == http.MethodGet {
 		file, err := os.Open(fileName)
 		if err != nil {
-			writeJSON(w, http.StatusInternalServerError, map[string]string{"error": err.Error()})
-			return
+			if os.IsNotExist(err) {
+				_ = os.MkdirAll(filepath.Dir(fileName), 0755)
+				_ = os.WriteFile(fileName, []byte("{}"), 0644)
+				file, err = os.Open(fileName)
+			}
+			if err != nil {
+				writeJSON(w, http.StatusInternalServerError, map[string]string{"error": err.Error()})
+				return
+			}
 		}
 		defer file.Close()
 
@@ -256,6 +271,7 @@ func (fs *FileServer) VoucherHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if r.Method == http.MethodPost {
+		_ = os.MkdirAll(filepath.Dir(fileName), 0755)
 		file, err := os.Create(fileName)
 		if err != nil {
 			writeJSON(w, http.StatusInternalServerError, map[string]string{"error": err.Error()})

pkg/promotions/types.go

@@ -400,6 +400,14 @@ func (sf *StateFile) GetPromotion(id string) (*PromotionRule, bool) {
 func LoadStateFile(fileName string) (*StateFile, error) {
 	f, err := os.Open(fileName)
 	if err != nil {
+		if os.IsNotExist(err) {
+			return &StateFile{
+				State: PromotionState{
+					Promotions: []PromotionRule{},
+				},
+				Version: 1,
+			}, nil
+		}
 		return nil, err
 	}
 	defer f.Close()

pkg/voucher/service.go

@@ -71,6 +71,14 @@ func (sf *StateFile) GetVoucher(code string) (*Voucher, bool) {
 func LoadStateFile(fileName string) (*StateFile, error) {
 	f, err := os.Open(fileName)
 	if err != nil {
+		if os.IsNotExist(err) {
+			return &StateFile{
+				State: State{
+					Vouchers: []Voucher{},
+				},
+				Version: 1,
+			}, nil
+		}
 		return nil, err
 	}
 	defer f.Close()