refactor: storage interface

pkg/storage/storage.go

@@ -1,12 +1,9 @@
 package storage
 
 import (
-	"fmt"
-
 	"galaxy/model/client"
 	"galaxy/model/order"
 	"galaxy/model/report"
-	"galaxy/util"
 )
 
 type Storage interface {
@@ -53,24 +50,3 @@ type UIStorage interface {
 	// I/O or encoding error may occur, it that case callback func will be called with non-nil error.
 	PutOrder(client.GameID, uint, order.Order, func(error))
 }
-
-type storage struct {
-	path string
-}
-
-func NewStorage(path string) (*storage, error) {
-	if ok, err := util.PathExists(path, true); err != nil {
-		return nil, fmt.Errorf("new storage: check path %q exists: %w", path, err)
-	} else if !ok {
-		return nil, fmt.Errorf("new storage: path %q does not exists", path)
-	}
-	if ok, err := util.Writable(path); err != nil {
-		return nil, fmt.Errorf("new storage: check path %q writable: %w", path, err)
-	} else if !ok {
-		return nil, fmt.Errorf("new storage: path %q is not writable", path)
-	}
-	s := &storage{
-		path: path,
-	}
-	return s, nil
-}