splitted app/imageoper/manififest.go

app/imageoper/getrefer.go

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2026 Oleg Borodin <onborodin@gmail.com>
+ *
+ * This work is published and licensed under a Creative Commons
+ * Attribution-NonCommercial-NoDerivatives 4.0 International License.
+ *
+ * Distribution of this work is permitted, but commercial use and
+ * modifications are strictly prohibited.
+ */
+package imageoper
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+)
+
+type GetRefererParams struct {
+	Name   string
+	Digest string
+}
+type GetRefererResult struct {
+	Reference string
+}
+
+func (oper *Operator) GetReferer(ctx context.Context, params *GetRefererParams) (*GetRefererResult, int, error) {
+	var err error
+	res := &GetRefererResult{}
+
+	if params.Name == "" {
+		err = fmt.Errorf("Empty name")
+		return res, http.StatusBadRequest, err
+	}
+	if params.Digest == "" {
+		err = fmt.Errorf("Empty digest")
+		return res, http.StatusBadRequest, err
+	}
+	manifests, err := oper.mdb.GetReferer(ctx, params.Name, params.Digest)
+	if err != nil {
+		return res, http.StatusInternalServerError, err
+	}
+	if len(manifests) == 0 {
+		return res, http.StatusNotFound, err
+	}
+	res.Reference = manifests[0].Reference
+	return res, http.StatusOK, err
+}