bugs on variant id

controllers/catalogueController.go

@@ -146,3 +146,48 @@ func (ctl *CatalogueController) GetProductBySKU(c *fiber.Ctx) error {
 		"details": product,
 	})
 }
+
+// GetProductByImageID resolves a catalogue row by the id the ingest pipeline
+// treats as canonical, so a caller holding an ingest manifest can find the
+// catalogueid it needs to import the product into a shop.
+func (ctl *CatalogueController) GetProductByImageID(c *fiber.Ctx) error {
+	brand := c.Query("brand")
+	imageID := c.Query("image_id")
+	if brand == "" || imageID == "" {
+		return c.JSON(fiber.Map{
+			"code":    400,
+			"message": "brand and image_id are required",
+			"status":  false,
+		})
+	}
+
+	product, err := ctl.catalogueService.GetProductByImageID(brand, imageID)
+	if err != nil {
+		if errors.Is(err, repositories.ErrUnknownBrand) {
+			return c.JSON(fiber.Map{
+				"code":    400,
+				"message": "Unknown brand: " + brand,
+				"status":  false,
+			})
+		}
+		return c.JSON(fiber.Map{
+			"code":    500,
+			"message": "Failed to fetch catalogue product",
+			"status":  false,
+		})
+	}
+	if product == nil {
+		return c.JSON(fiber.Map{
+			"code":    404,
+			"message": "Product not found",
+			"status":  false,
+		})
+	}
+
+	return c.JSON(fiber.Map{
+		"code":    http.StatusOK,
+		"message": "Success",
+		"status":  true,
+		"details": product,
+	})
+}