variants as a single product

services/productVisibility.go

@@ -85,3 +85,35 @@ func InStockOnlyGrouped(groups []models.Tenantproducts) []models.Tenantproducts
 	}
 	return out
 }
+
+// WithoutVariantChildren drops the products that are a size of another one.
+//
+// The companion to InStockOnlyGrouped, and applied only for the customer app.
+// A shop stocking Aachi Baby Fryums in 100g, 500g and 1kg has three rows; the
+// shopper should meet one product with three sizes, not three near-identical
+// listings they have to read the suffix of to tell apart.
+//
+// The group's visible row is the PARENT, and it carries the whole set in
+// `variantoptions` — including its own size — so nothing is unreachable: every
+// size is one tap away from the one row that remains.
+//
+// The console is deliberately unaffected. A merchant prices, restocks and
+// publishes each size separately, so all three must stay visible there.
+func WithoutVariantChildren(groups []models.Tenantproducts, isChild map[int]bool) []models.Tenantproducts {
+	if len(isChild) == 0 {
+		return groups
+	}
+	out := make([]models.Tenantproducts, 0, len(groups))
+	for _, group := range groups {
+		kept := make([]models.Products, 0, len(group.Products))
+		for _, product := range group.Products {
+			if isChild[product.Productid] {
+				continue
+			}
+			kept = append(kept, product)
+		}
+		group.Products = kept
+		out = append(out, group)
+	}
+	return out
+}