Add initial triplestore rebuild functionality

internal/dis/component/triplestore/restore.go

@@ -0,0 +1,28 @@
+package triplestore
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"net/http"
+
+	"github.com/pkg/errors"
+)
+
+var errTSRestoreWrongStatusCode = errors.New("Triplestore.Restore: Wrong status code")
+
+// RestoreDB snapshots the provided repository into dst
+func (ts Triplestore) RestoreDB(ctx context.Context, repo string, reader io.Reader) error {
+	// submit the form
+	res, err := ts.DoRestWithReader(ctx, 0, http.MethodPut, "/repositories/"+repo+"/statements", &RequestHeaders{ContentType: nquadsContentType}, reader)
+	if err != nil {
+		return err
+	}
+	defer res.Body.Close()
+
+	if res.StatusCode != http.StatusNoContent {
+		message, _ := io.ReadAll(res.Body)
+		return fmt.Errorf("%w: %s", errTSRestoreWrongStatusCode, message)
+	}
+	return nil
+}