added minimal image checker

app/storage/file.go

@@ -8,6 +8,7 @@ import (
 	"io"
 	"os"
 	"path/filepath"
+	"strings"
 
 	"mstore/pkg/auxuuid"
 )
@@ -59,7 +60,6 @@ func (store *Storage) FileExists(collection, filename string) (bool, int64, erro
 func (store *Storage) GetFileReader(collection, filename string) (io.ReadCloser, error) {
 	var err error
 	var res io.ReadCloser
-
 	filename = store.makeFilepath(collection, filename)
 	file, err := os.OpenFile(filename, os.O_RDONLY, 0)
 	if err != nil {
@@ -72,14 +72,12 @@ func (store *Storage) GetFileReader(collection, filename string) (io.ReadCloser,
 func (store *Storage) GetFileCheksum(collection, filename string) (string, error) {
 	var err error
 	var res string
-
 	filename = store.makeFilepath(collection, filename)
 	file, err := os.OpenFile(filename, os.O_RDONLY, 0)
 	if err != nil {
 		return res, err
 	}
 	defer file.Close()
-
 	hasher := NewHasher()
 	_, err = io.Copy(hasher.Writer(), file)
 	if err != nil {
@@ -116,7 +114,6 @@ func (store *Storage) WriteTempFile(source io.Reader) (string, int64, string, er
 		return tmpName, size, csum, err
 	}
 	csum = hasher.Hex()
-
 	return tmpName, size, csum, err
 }
 
@@ -158,8 +155,29 @@ func (store *Storage) DeleteFile(collection, filename string) error {
 	if err != nil {
 		return err
 	}
-	// TODO: clean removing
-	dirname := store.makeCollecionpath(collection)
-	os.RemoveAll(dirname)
+	// TODO: clean dirs removing
 	return err
 }
+
+func (store *Storage) ListAllFiles() ([]string, error) {
+	names := make([]string, 0)
+	var err error
+	rootdir := store.makeCollecionpath(string(filepath.Separator))
+	walker := func(filename string, fileInfo os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+		if !fileInfo.Mode().IsRegular() {
+			return nil
+		}
+		name := strings.TrimPrefix(filename, filepath.Clean(rootdir))
+		name = filepath.Join(string(filepath.Separator), name)
+		names = append(names, name)
+		return nil
+	}
+	err = filepath.Walk(rootdir, walker)
+	if err != nil {
+		return names, err
+	}
+	return names, err
+}