Add 'thumbnails/' from commit '2ebf7b2f23af96b3b499c401fe5498a9349403d8'

git-subtree-dir: thumbnails
git-subtree-mainline: ccc651a11e
git-subtree-split: 2ebf7b2f23

thumbnails/pkg/thumbnail/imgsource/filesystem.go

@@ -0,0 +1,39 @@
+package imgsource
+
+import (
+	"context"
+	"fmt"
+	"image"
+	"os"
+	"path/filepath"
+
+	"github.com/owncloud/ocis-thumbnails/pkg/config"
+)
+
+// NewFileSystemSource return a new FileSystem instance
+func NewFileSystemSource(cfg config.FileSystemSource) FileSystem {
+	return FileSystem{
+		basePath: cfg.BasePath,
+	}
+}
+
+// FileSystem is an image source using the local file system
+type FileSystem struct {
+	basePath string
+}
+
+// Get retrieves an image from the filesystem.
+func (s FileSystem) Get(ctx context.Context, file string) (image.Image, error) {
+	imgPath := filepath.Join(s.basePath, file)
+	f, err := os.Open(filepath.Clean(imgPath))
+	if err != nil {
+		return nil, fmt.Errorf("failed to load the file %s from %s error %s", file, imgPath, err.Error())
+	}
+
+	img, _, err := image.Decode(f)
+	if err != nil {
+		return nil, err
+	}
+
+	return img, nil
+}