feat: image gallery (#2)

Reviewed-on: #2

internal/components/gallery/dir.go

@@ -0,0 +1,40 @@
+package gallery
+
+import (
+	"os"
+	"path"
+)
+
+type fileWithPath struct {
+	os.FileInfo
+	path string
+}
+
+func (f fileWithPath) Name() string {
+	return path.Join(f.path, f.FileInfo.Name())
+}
+
+func (s *Service) readDirRecursive(path string) (files []os.FileInfo, err error) {
+	return s.readDirRecursiveTo([]os.FileInfo{}, path)
+}
+
+func (s *Service) readDirRecursiveTo(files []os.FileInfo, p ...string) ([]os.FileInfo, error) {
+	localFiles, err := s.fs.ReadDir(path.Join(p...))
+	if err != nil {
+		return files, err
+	}
+
+	for _, file := range localFiles {
+		if file.IsDir() {
+			newP := append(p, file.Name())
+			files, err = s.readDirRecursiveTo(files, newP...)
+			if err != nil {
+				return files, err
+			}
+		} else {
+			files = append(files, fileWithPath{file, path.Join(p[1:]...)})
+		}
+	}
+
+	return files, nil
+}