add a new package - filestorage

pkg/filestorage/config.go

@@ -0,0 +1,11 @@
+package filestorage
+
+type Config struct {
+	BasePath string
+}
+
+func getDefaultConfig() *Config {
+	return &Config{
+		BasePath: "./",
+	}
+}

pkg/filestorage/filestorage.go

@@ -0,0 +1,46 @@
+package filestorage
+
+import (
+	"io"
+	"os"
+	"path"
+
+	"github.com/pkg/errors"
+)
+
+type fileStorage struct {
+	basePath string
+}
+
+func New(cfg *Config) FileStorage {
+	if cfg == nil {
+		cfg = getDefaultConfig()
+	}
+
+	return &fileStorage{
+		cfg.BasePath,
+	}
+}
+
+func (storage *fileStorage) Put(file io.Reader, filename string) error {
+	fullPath := path.Join(storage.basePath, filename)
+	f, err := os.Create(fullPath)
+	if err != nil {
+		return errors.Wrap(err, "FileStorage.Put")
+	}
+	defer f.Close()
+	_, err = io.Copy(f, file)
+	if err != nil {
+		return errors.Wrap(err, "FileStorage.Put")
+	}
+	return nil
+}
+
+func (storage *fileStorage) Delete(filename string) error {
+	fullPath := path.Join(storage.basePath, filename)
+	err := os.Remove(fullPath)
+	if err != nil {
+		return errors.Wrap(err, "FileStorage.Delete")
+	}
+	return nil
+}

pkg/filestorage/interface.go

@@ -0,0 +1,8 @@
+package filestorage
+
+import "io"
+
+type FileStorage interface {
+	Put(file io.Reader, filename string) error
+	Delete(filename string) error
+}