init template

loader/chain/loader.go

@@ -0,0 +1,29 @@
+package chain
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	"gitoa.ru/go-4devs/templating/loader"
+	"gitoa.ru/go-4devs/templating/render"
+)
+
+var _ loader.Loader = (Loaders)(nil)
+
+type Loaders []loader.Loader
+
+func (l Loaders) Load(ctx context.Context, template render.Reference) (loader.Source, error) {
+	for idx, load := range l {
+		sourse, err := load.Load(ctx, template)
+		if err == nil {
+			return sourse, nil
+		}
+
+		if !errors.Is(err, loader.ErrNotFound) {
+			return loader.Source{}, fmt.Errorf("chain[%d]:%w", idx, err)
+		}
+	}
+
+	return loader.Source{}, fmt.Errorf("chains(%d):%w", len(l), loader.ErrNotFound)
+}