Drag and drop files between folders

internal/files/files.go

@@ -63,6 +63,19 @@ func DeleteFile(dataDir, userID, relPath string) error {
 	return os.RemoveAll(p)
 }
 
+// MoveFile moves a file or folder to a new path.
+func MoveFile(dataDir, userID, fromRel, toRel string) error {
+	from := safePath(dataDir, userID, fromRel)
+	to := safePath(dataDir, userID, toRel)
+	if from == "" || to == "" {
+		return os.ErrPermission
+	}
+	if err := os.MkdirAll(filepath.Dir(to), 0755); err != nil {
+		return err
+	}
+	return os.Rename(from, to)
+}
+
 // ListTree returns the file tree for a user.
 func ListTree(dataDir, userID string) ([]FileInfo, error) {
 	root := UserDir(dataDir, userID)