role-mapping-fixes

app/builder/[categoryId]/page.tsx

@@ -4,21 +4,19 @@ import { useEffect, useMemo, useState } from "react";
 import Link from "next/link";
 import { useParams, useRouter } from "next/navigation";
 import { CATEGORIES } from "@/data/gunbuilderParts";
-import { CATEGORY_TO_PART_ROLES } from "@/data/partRoleMappings";
 import type { CategoryId, Part } from "@/types/gunbuilder";
 
 type ViewMode = "card" | "list";
 
 type GunbuilderProductFromApi = {
-  id: string;
+  id: number;
   name: string;
   brand: string;
   platform: string;
   partRole: string;
   price: number | null;
-  mainImageUrl: string | null;
+  imageUrl: string | null;
   buyUrl: string | null;
-  // optional stock flag if/when backend sends it
   inStock?: boolean | null;
 };
 
@@ -83,19 +81,14 @@ export default function CategoryPage() {
 
     async function fetchCategoryParts() {
       try {
-         setLoading(true);
+        setLoading(true);
         setError(null);
 
-        // FIX: determine which backend partRoles map to this category
-    const roles = CATEGORY_TO_PART_ROLES[categoryId] ?? [];
-
         const search = new URLSearchParams();
         search.set("platform", "AR-15");
-        roles.forEach((r) => search.append("partRoles", r));
+        search.set("categorySlug", categoryId);
 
-        const url = `${API_BASE_URL}/api/products/gunbuilder${
-          roles.length ? `?${search.toString()}` : ""
-        }`;
+        const url = `${API_BASE_URL}/api/gunbuilder/products/by-category?${search.toString()}`;
 
         const res = await fetch(url, { signal: controller.signal });
 
@@ -106,12 +99,12 @@ export default function CategoryPage() {
         const data: GunbuilderProductFromApi[] = await res.json();
 
         const normalized: UiPart[] = data.map((p) => ({
-          id: p.id,
+          id: String(p.id),                 // normalize to string for BuildState
           categoryId,
           name: p.name,
           brand: p.brand,
           price: p.price ?? 0,
-          imageUrl: p.mainImageUrl ?? undefined,
+          imageUrl: p.imageUrl ?? undefined, // match backend field name
           url: p.buyUrl ?? undefined,
           notes: undefined,
           inStock: p.inStock ?? true,

data/partRoleMappings.ts

@@ -10,7 +10,7 @@ export const CATEGORY_TO_PART_ROLES: Record<CategoryId, string[]> = {
   buffer: ["buffer-kit"],
   lowerParts: ["lower-parts-kit"],
   sights: ["sight"],
-  lower: ["lower-receiver"],
+  lower: ["LOWER_RECEIVER_STRIPPED"],
   optic: ["optic"],
   stock: ["stock"],