90ish percent working. data flows, offers are create and pricings is pulling.

src/main/java/group/goforward/ballistic/configuration/CorsConfig.java

@@ -26,9 +26,12 @@ public class CorsConfig {
                 "http://localhost:4201",
                 "http://localhost:8070",
                 "https://localhost:8070",
+                "http://localhost:8080",
+                "https://localhost:8080",
+                "http://localhost:3000",
+                "https://localhost:3000",
                 "http://192.168.11.210:8070",
                 "https://192.168.11.210:8070",
-                "http://localhost:4200",
                 "http://citysites.gofwd.group",
                 "https://citysites.gofwd.group",
                 "http://citysites.gofwd.group:8070",

src/main/java/group/goforward/ballistic/controllers/ProductController.java

@@ -0,0 +1,86 @@
+package group.goforward.ballistic.controllers;
+
+import group.goforward.ballistic.model.Product;
+import group.goforward.ballistic.model.ProductOffer;
+import group.goforward.ballistic.repos.ProductOfferRepository;
+import group.goforward.ballistic.repos.ProductRepository;
+import group.goforward.ballistic.web.dto.ProductSummaryDto;
+import group.goforward.ballistic.web.mapper.ProductMapper;
+import org.springframework.web.bind.annotation.*;
+
+import java.math.BigDecimal;
+import java.util.*;
+import java.util.stream.Collectors;
+
+@RestController
+@RequestMapping("/api/products")
+@CrossOrigin
+public class ProductController {
+
+    private final ProductRepository productRepository;
+    private final ProductOfferRepository productOfferRepository;
+
+    public ProductController(
+            ProductRepository productRepository,
+            ProductOfferRepository productOfferRepository
+    ) {
+        this.productRepository = productRepository;
+        this.productOfferRepository = productOfferRepository;
+    }
+
+    @GetMapping("/gunbuilder")
+    public List<ProductSummaryDto> getGunbuilderProducts(
+            @RequestParam(defaultValue = "AR-15") String platform,
+            @RequestParam(required = false, name = "partRoles") List<String> partRoles
+    ) {
+        // 1) Load products
+        List<Product> products;
+        if (partRoles == null || partRoles.isEmpty()) {
+            products = productRepository.findByPlatform(platform);
+        } else {
+            products = productRepository.findByPlatformAndPartRoleIn(platform, partRoles);
+        }
+
+        if (products.isEmpty()) {
+            return List.of();
+        }
+
+        // 2) Load offers for these product IDs (Integer IDs)
+        List<Integer> productIds = products.stream()
+                .map(Product::getId)
+                .toList();
+
+        List<ProductOffer> allOffers =
+                productOfferRepository.findByProductIdIn(productIds);
+
+        Map<Integer, List<ProductOffer>> offersByProductId = allOffers.stream()
+                .collect(Collectors.groupingBy(o -> o.getProduct().getId()));
+
+        // 3) Map to DTOs with price and buyUrl
+        return products.stream()
+                .map(p -> {
+                    List<ProductOffer> offersForProduct =
+                            offersByProductId.getOrDefault(p.getId(), Collections.emptyList());
+
+                    ProductOffer bestOffer = pickBestOffer(offersForProduct);
+
+                    BigDecimal price = bestOffer != null ? bestOffer.getEffectivePrice() : null;
+                    String buyUrl = bestOffer != null ? bestOffer.getBuyUrl() : null;
+
+                    return ProductMapper.toSummary(p, price, buyUrl);
+                })
+                .toList();
+    }
+
+    private ProductOffer pickBestOffer(List<ProductOffer> offers) {
+        if (offers == null || offers.isEmpty()) {
+            return null;
+        }
+
+        // Right now: lowest price wins, regardless of stock (we set inStock=true on import anyway)
+        return offers.stream()
+                .filter(o -> o.getEffectivePrice() != null)
+                .min(Comparator.comparing(ProductOffer::getEffectivePrice))
+                .orElse(null);
+    }
+}

src/main/java/group/goforward/ballistic/imports/MerchantFeedImportServiceImpl.java

@@ -19,8 +19,14 @@ import group.goforward.ballistic.model.Product;
 import group.goforward.ballistic.repos.BrandRepository;
 import group.goforward.ballistic.repos.MerchantRepository;
 import group.goforward.ballistic.repos.ProductRepository;
+import group.goforward.ballistic.repos.MerchantCategoryMapRepository;
+import group.goforward.ballistic.model.MerchantCategoryMap;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
+import group.goforward.ballistic.repos.ProductOfferRepository;
+import group.goforward.ballistic.model.ProductOffer;
+
+import java.time.OffsetDateTime;
 
 @Service
 @Transactional
@@ -29,13 +35,19 @@ public class MerchantFeedImportServiceImpl implements MerchantFeedImportService
     private final MerchantRepository merchantRepository;
     private final BrandRepository brandRepository;
     private final ProductRepository productRepository;
+    private final MerchantCategoryMapRepository merchantCategoryMapRepository;
+    private final ProductOfferRepository productOfferRepository;
 
     public MerchantFeedImportServiceImpl(MerchantRepository merchantRepository,
                                          BrandRepository brandRepository,
-                                         ProductRepository productRepository) {
+                                         ProductRepository productRepository,
+                                         MerchantCategoryMapRepository merchantCategoryMapRepository,
+                                         ProductOfferRepository productOfferRepository) {
         this.merchantRepository = merchantRepository;
         this.brandRepository = brandRepository;
         this.productRepository = productRepository;
+        this.merchantCategoryMapRepository = merchantCategoryMapRepository;
+        this.productOfferRepository = productOfferRepository;
     }
 
     @Override
@@ -99,11 +111,18 @@ public class MerchantFeedImportServiceImpl implements MerchantFeedImportService
             p = candidates.get(0);
         }
 
-        updateProductFromRow(p, row, isNew);
+        updateProductFromRow(p, merchant, row, isNew);
-        return productRepository.save(p);
+
+        // Save the product first
+        Product saved = productRepository.save(p);
+
+        // Then upsert the offer for this row
+        upsertOfferFromRow(saved, merchant, row);
+
+        return saved;
     }
 
-    private void updateProductFromRow(Product p, MerchantFeedRow row, boolean isNew) {
+    private void updateProductFromRow(Product p, Merchant merchant, MerchantFeedRow row, boolean isNew) {
         // ---------- NAME ----------
         String name = coalesce(
                 trimOrNull(row.productName()),
@@ -164,13 +183,105 @@ public class MerchantFeedImportServiceImpl implements MerchantFeedImportService
         String platform = inferPlatform(row);
         p.setPlatform(platform != null ? platform : "AR-15");
 
+        // ---------- RAW CATEGORY KEY (for debugging / analytics) ----------
+        String rawCategoryKey = buildRawCategoryKey(row);
+        p.setRawCategoryKey(rawCategoryKey);
+
         // ---------- PART ROLE ----------
-        String partRole = inferPartRole(row);
+        String partRole = resolvePartRole(merchant, row);
         if (partRole == null || partRole.isBlank()) {
             partRole = "unknown";
         }
         p.setPartRole(partRole);
     }
+    private void upsertOfferFromRow(Product product, Merchant merchant, MerchantFeedRow row) {
+        // For now, we’ll use SKU as the "avantlinkProductId" placeholder.
+        // If/when you have a real AvantLink product_id in the feed, switch to that.
+        String avantlinkProductId = trimOrNull(row.sku());
+        if (avantlinkProductId == null) {
+            // If there's truly no SKU, bail out – we can't match this offer reliably.
+            System.out.println("IMPORT !!! skipping offer: no SKU for product id=" + product.getId());
+            return;
+        }
+    
+        // Simple approach: always create a new offer row.
+        // (If you want idempotent imports later, we can add a repository finder
+        //  like findByProductAndMerchantAndAvantlinkProductId(...) and reuse the row.)
+        ProductOffer offer = new ProductOffer();
+        offer.setProduct(product);
+        offer.setMerchant(merchant);
+        offer.setAvantlinkProductId(avantlinkProductId);
+    
+        // Identifiers
+        offer.setSku(trimOrNull(row.sku()));
+        // No real UPC in this feed yet – leave null for now
+        offer.setUpc(null);
+    
+        // Buy URL
+        offer.setBuyUrl(trimOrNull(row.buyLink()));
+    
+        // Prices from feed
+        BigDecimal retail = row.retailPrice(); // parsed as BigDecimal in readFeedRowsForMerchant
+        BigDecimal sale   = row.salePrice();
+    
+        BigDecimal effectivePrice;
+        BigDecimal originalPrice;
+    
+        if (sale != null) {
+            effectivePrice = sale;
+            originalPrice = (retail != null ? retail : sale);
+        } else {
+            effectivePrice = retail;
+            originalPrice = retail;
+        }
+    
+        offer.setPrice(effectivePrice);
+        offer.setOriginalPrice(originalPrice);
+    
+        // Currency + stock
+        offer.setCurrency("USD");
+        // We don't have a real stock flag in this CSV, so assume in-stock for now
+        offer.setInStock(Boolean.TRUE);
+    
+        // Timestamps
+        OffsetDateTime now = OffsetDateTime.now();
+        offer.setLastSeenAt(now);
+        offer.setFirstSeenAt(now); // first import: treat now as first seen
+    
+        productOfferRepository.save(offer);
+    }
+
+    private String resolvePartRole(Merchant merchant, MerchantFeedRow row) {
+        // Build a merchant-specific raw category key like "Department > Category > SubCategory"
+        String rawCategoryKey = buildRawCategoryKey(row);
+
+        if (rawCategoryKey != null) {
+            MerchantCategoryMap mapping = merchantCategoryMapRepository
+                    .findByMerchantAndRawCategoryIgnoreCase(merchant, rawCategoryKey)
+                    .orElse(null);
+
+            if (mapping != null && mapping.isEnabled()) {
+                String mappedPartRole = trimOrNull(mapping.getPartRole());
+                if (mappedPartRole != null && !mappedPartRole.isBlank()) {
+                    return mappedPartRole;
+                }
+            }
+        }
+
+        // Fallback: keyword-based inference
+        String keywordRole = inferPartRole(row);
+        if (keywordRole != null && !keywordRole.isBlank()) {
+            return keywordRole;
+        }
+
+        // Last resort: log as unmapped and return null/unknown
+        System.out.println("IMPORT !!! UNMAPPED CATEGORY for merchant=" + merchant.getName()
+                + ", rawCategoryKey='" + rawCategoryKey + "'"
+                + ", sku=" + row.sku()
+                + ", productName=" + row.productName());
+
+        return null;
+    }
 
     // ---------------------------------------------------------------------
     //  Feed reading + brand resolution
@@ -293,6 +404,23 @@ public class MerchantFeedImportServiceImpl implements MerchantFeedImportService
         return candidate;
     }
 
+    private String buildRawCategoryKey(MerchantFeedRow row) {
+        String dept = trimOrNull(row.department());
+        String cat = trimOrNull(row.category());
+        String sub = trimOrNull(row.subCategory());
+
+        java.util.List<String> parts = new java.util.ArrayList<>();
+        if (dept != null) parts.add(dept);
+        if (cat != null) parts.add(cat);
+        if (sub != null) parts.add(sub);
+
+        if (parts.isEmpty()) {
+            return null;
+        }
+
+        return String.join(" > ", parts);
+    }
+
     private String inferPlatform(MerchantFeedRow row) {
         String department = coalesce(trimOrNull(row.department()), trimOrNull(row.category()));
         if (department == null) return null;

src/main/java/group/goforward/ballistic/model/MerchantCategoryMap.java

@@ -0,0 +1,86 @@
+package group.goforward.ballistic.model;
+
+import jakarta.persistence.*;
+
+@Entity
+@Table(name = "merchant_category_map")
+public class MerchantCategoryMap {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Integer id;
+
+    @ManyToOne(fetch = FetchType.LAZY, optional = false)
+    @JoinColumn(name = "merchant_id", nullable = false)
+    private Merchant merchant;
+
+    @Column(name = "raw_category", nullable = false, length = 255)
+    private String rawCategory;
+
+    // NEW FIELDS
+    @Column(name = "platform")
+    private String platform;            // e.g. "AR-15", "AR-10"
+
+    @Column(name = "part_role")
+    private String partRole;            // e.g. "barrel", "handguard"
+
+    @Column(name = "canonical_category")
+    private String canonicalCategory;   // e.g. "Rifle Barrels"
+
+    @Column(name = "enabled", nullable = false)
+    private boolean enabled = true;
+
+    // --- getters & setters ---
+
+    public Integer getId() {
+        return id;
+    }
+
+    public Merchant getMerchant() {
+        return merchant;
+    }
+
+    public void setMerchant(Merchant merchant) {
+        this.merchant = merchant;
+    }
+
+    public String getRawCategory() {
+        return rawCategory;
+    }
+
+    public void setRawCategory(String rawCategory) {
+        this.rawCategory = rawCategory;
+    }
+
+    public String getPlatform() {
+        return platform;
+    }
+
+    public void setPlatform(String platform) {
+        this.platform = platform;
+    }
+
+    public String getPartRole() {
+        return partRole;
+    }
+
+    public void setPartRole(String partRole) {
+        this.partRole = partRole;
+    }
+
+    public String getCanonicalCategory() {
+        return canonicalCategory;
+    }
+
+    public void setCanonicalCategory(String canonicalCategory) {
+        this.canonicalCategory = canonicalCategory;
+    }
+
+    public boolean isEnabled() {
+        return enabled;
+    }
+
+    public void setEnabled(boolean enabled) {
+        this.enabled = enabled;
+    }
+}

src/main/java/group/goforward/ballistic/model/Product.java

@@ -55,6 +55,9 @@ public class Product {
 
     @Column(name = "deleted_at")
     private Instant deletedAt;
+    
+    @Column(name = "raw_category_key")
+    private String rawCategoryKey;
 
     // --- lifecycle hooks ---
 
@@ -77,6 +80,14 @@ public class Product {
         updatedAt = Instant.now();
     }
 
+    public String getRawCategoryKey() {
+        return rawCategoryKey;
+    }
+
+    public void setRawCategoryKey(String rawCategoryKey) {
+        this.rawCategoryKey = rawCategoryKey;
+    }
+
     // --- getters & setters ---
 
     public Integer getId() {

src/main/java/group/goforward/ballistic/model/ProductOffer.java

@@ -13,9 +13,9 @@ import java.util.UUID;
 @Table(name = "product_offers")
 public class ProductOffer {
     @Id
-    @GeneratedValue(strategy = GenerationType.AUTO)
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "id", nullable = false)
-    private UUID id;
+    private Integer id;
 
     @ManyToOne(fetch = FetchType.LAZY, optional = false)
     @OnDelete(action = OnDeleteAction.CASCADE)
@@ -60,11 +60,11 @@ public class ProductOffer {
     @Column(name = "first_seen_at", nullable = false)
     private OffsetDateTime firstSeenAt;
 
-    public UUID getId() {
+    public Integer getId() {
         return id;
     }
 
-    public void setId(UUID id) {
+    public void setId(Integer id) {
         this.id = id;
     }
 
@@ -164,4 +164,14 @@ public class ProductOffer {
         this.firstSeenAt = firstSeenAt;
     }
 
+    public BigDecimal getEffectivePrice() {
+        // Prefer a true sale price when it's lower than the original
+        if (price != null && originalPrice != null && price.compareTo(originalPrice) < 0) {
+            return price;
+        }
+    
+        // Otherwise, use whatever is available
+        return price != null ? price : originalPrice;
+    }
+
 }

src/main/java/group/goforward/ballistic/repos/MerchantCategoryMapRepository.java

@@ -0,0 +1,12 @@
+package group.goforward.ballistic.repos;
+
+import group.goforward.ballistic.model.Merchant;
+import group.goforward.ballistic.model.MerchantCategoryMap;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.Optional;
+
+public interface MerchantCategoryMapRepository extends JpaRepository<MerchantCategoryMap, Integer> {
+
+    Optional<MerchantCategoryMap> findByMerchantAndRawCategoryIgnoreCase(Merchant merchant, String rawCategory);
+}

src/main/java/group/goforward/ballistic/repos/MerchantRepository.java

@@ -3,5 +3,9 @@ package group.goforward.ballistic.repos;
 import group.goforward.ballistic.model.Merchant;
 import org.springframework.data.jpa.repository.JpaRepository;
 
+import java.util.Optional;
+
 public interface MerchantRepository extends JpaRepository<Merchant, Integer> {
+
+    Optional<Merchant> findByNameIgnoreCase(String name);
 }

src/main/java/group/goforward/ballistic/repos/ProductOfferRepository.java

@@ -1,14 +1,12 @@
 package group.goforward.ballistic.repos;
 
 import group.goforward.ballistic.model.ProductOffer;
-import group.goforward.ballistic.model.Product;
-import group.goforward.ballistic.model.Merchant;
 import org.springframework.data.jpa.repository.JpaRepository;
-import java.util.List;
-import java.util.Optional;
-import java.util.UUID;
 
-public interface ProductOfferRepository extends JpaRepository<ProductOffer, UUID> {
+import java.util.Collection;
-    Optional<ProductOffer> findByMerchantAndAvantlinkProductId(Merchant merchant, String avantlinkProductId);
+import java.util.List;
-    List<ProductOffer> findByProductAndInStockTrueOrderByPriceAsc(Product product);
+
+public interface ProductOfferRepository extends JpaRepository<ProductOffer, Integer> {
+
+    List<ProductOffer> findByProductIdIn(Collection<Integer> productIds);
 }

src/main/java/group/goforward/ballistic/repos/ProductRepository.java

@@ -7,6 +7,7 @@ import org.springframework.data.jpa.repository.JpaRepository;
 import java.util.Optional;
 import java.util.UUID;
 import java.util.List;
+import java.util.Collection;
 
 public interface ProductRepository extends JpaRepository<Product, Integer> {
 
@@ -17,4 +18,10 @@ public interface ProductRepository extends JpaRepository<Product, Integer> {
     List<Product> findAllByBrandAndMpn(Brand brand, String mpn);
 
     List<Product> findAllByBrandAndUpc(Brand brand, String upc);
+
+    // All products for a given platform (e.g. "AR-15")
+    List<Product> findByPlatform(String platform);
+
+    // Products filtered by platform + part roles (e.g. upper-receiver, barrel, etc.)
+    List<Product> findByPlatformAndPartRoleIn(String platform, Collection<String> partRoles);
 }

src/main/java/group/goforward/ballistic/seed/MerchantCategoryMapSeeder.java

@@ -0,0 +1,179 @@
+package group.goforward.ballistic.seed;
+
+import group.goforward.ballistic.model.Merchant;
+import group.goforward.ballistic.model.MerchantCategoryMap;
+import group.goforward.ballistic.repos.MerchantCategoryMapRepository;
+import group.goforward.ballistic.repos.MerchantRepository;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class MerchantCategoryMapSeeder {
+
+    @Bean
+    public CommandLineRunner seedMerchantCategoryMaps(MerchantRepository merchantRepository,
+                                                      MerchantCategoryMapRepository mapRepository) {
+        return args -> {
+            // --- Guard: only seed if table is (mostly) empty ---
+            long existing = mapRepository.count();
+            if (existing > 0) {
+                System.out.println("CategoryMapSeeder: found " + existing + " existing mappings, skipping seeding.");
+                return;
+            }
+
+            System.out.println("CategoryMapSeeder: seeding initial MerchantCategoryMap rows...");
+
+            // Adjust merchant names if they differ in your DB
+            seedAeroPrecision(merchantRepository, mapRepository);
+            seedBrownells(merchantRepository, mapRepository);
+            seedPSA(merchantRepository, mapRepository);
+
+            System.out.println("CategoryMapSeeder: seeding complete.");
+        };
+    }
+
+    // ---------------------------------------------------------------------
+    // AERO PRECISION
+    // ---------------------------------------------------------------------
+
+    private void seedAeroPrecision(MerchantRepository merchantRepository,
+                                   MerchantCategoryMapRepository mapRepository) {
+
+        merchantRepository.findByNameIgnoreCase("Aero Precision").ifPresent(merchant -> {
+
+            // Keys come from Department | Category | SubCategory combos
+            upsert(merchant, "Charging Handles",
+                    "AR-15", "charging-handle", "Charging Handles", true, mapRepository);
+
+            upsert(merchant, "Shop All Barrels",
+                    null, "barrel", "Rifle Barrels", true, mapRepository);
+
+            upsert(merchant, "Lower Parts Kits",
+                    "AR-15", "lower-parts-kit", "Lower Parts Kits", true, mapRepository);
+
+            upsert(merchant, "Handguards",
+                    "AR-15", "handguard", "Handguards & Rails", true, mapRepository);
+
+            upsert(merchant, "Upper Receivers",
+                    "AR-15", "upper-receiver", "Upper Receivers", true, mapRepository);
+
+            // Platform-only hints (let your existing heuristics decide part_role)
+            upsert(merchant, ".308 Winchester",
+                    "AR-10", null, "AR-10 / .308 Parts", true, mapRepository);
+
+            upsert(merchant, "6.5 Creedmoor",
+                    "AR-10", null, "6.5 Creedmoor Parts", true, mapRepository);
+
+            upsert(merchant, "5.56 Nato / .223 Wylde",
+                    "AR-15", null, "5.56 / .223 Wylde Parts", true, mapRepository);
+        });
+    }
+
+    // ---------------------------------------------------------------------
+    // BROWNELLS
+    // ---------------------------------------------------------------------
+
+    private void seedBrownells(MerchantRepository merchantRepository,
+                               MerchantCategoryMapRepository mapRepository) {
+
+        merchantRepository.findByNameIgnoreCase("Brownells").ifPresent(merchant -> {
+
+            upsert(merchant, "Rifle Parts | Receiver Parts | Receivers",
+                    null, "receiver", "Rifle Receivers", true, mapRepository);
+
+            upsert(merchant, "Rifle Parts | Barrel Parts | Rifle Barrels",
+                    null, "barrel", "Rifle Barrels", true, mapRepository);
+
+            upsert(merchant, "Rifle Parts | Stock Parts | Rifle Stocks",
+                    null, "stock", "Rifle Stocks", true, mapRepository);
+
+            upsert(merchant, "Rifle Parts | Muzzle Devices | Compensators & Muzzle Brakes",
+                    null, "muzzle-device", "Muzzle Devices", true, mapRepository);
+
+            upsert(merchant, "Rifle Parts | Trigger Parts | Triggers",
+                    null, "trigger", "Triggers", true, mapRepository);
+
+            upsert(merchant, "Rifle Parts | Receiver Parts | Magazine Parts",
+                    null, "magazine", "Magazine & Mag Parts", true, mapRepository);
+
+            upsert(merchant, "Rifle Parts | Sights | Front Sights",
+                    null, "sight", "Iron Sights", true, mapRepository);
+
+            upsert(merchant, "Rifle Parts | Sights | Rear Sights",
+                    null, "sight", "Iron Sights", true, mapRepository);
+
+            upsert(merchant, "Rifle Parts | Receiver Parts | Buffer Tube Parts",
+                    null, "buffer-tube", "Buffer Tubes & Parts", true, mapRepository);
+
+            upsert(merchant, "Rifle Parts | Stock Parts | Buttstocks",
+                    null, "stock", "Buttstocks", true, mapRepository);
+        });
+    }
+
+    // ---------------------------------------------------------------------
+    // PALMETTO STATE ARMORY (PSA)
+    // ---------------------------------------------------------------------
+
+    private void seedPSA(MerchantRepository merchantRepository,
+                         MerchantCategoryMapRepository mapRepository) {
+
+        merchantRepository.findByNameIgnoreCase("Palmetto State Armory").ifPresent(merchant -> {
+
+            upsert(merchant, "AR-15 Parts | Upper Parts | Stripped Uppers",
+                    "AR-15", "upper-receiver", "AR-15 Stripped Uppers", true, mapRepository);
+
+            upsert(merchant, "AR-15 Parts | Upper Parts | Complete Uppers",
+                    "AR-15", "complete-upper", "AR-15 Complete Uppers", true, mapRepository);
+
+            upsert(merchant, "AR-15 Parts | Barrel Parts | Barrels",
+                    "AR-15", "barrel", "AR-15 Barrels", true, mapRepository);
+
+            upsert(merchant, "AR-15 Parts | Lower Parts | Stripped Lowers",
+                    "AR-15", "lower-receiver", "AR-15 Stripped Lowers", true, mapRepository);
+
+            upsert(merchant, "AR-15 Parts | Handguard Parts | Handguards",
+                    "AR-15", "handguard", "AR-15 Handguards", true, mapRepository);
+
+            upsert(merchant, "AR-15 Parts | Bolt Carrier Groups | Bolt Carrier Groups",
+                    "AR-15", "bcg", "AR-15 BCGs", true, mapRepository);
+
+            upsert(merchant, "AR-15 Parts | Trigger Parts | Triggers",
+                    "AR-15", "trigger", "AR-15 Triggers", true, mapRepository);
+
+            upsert(merchant, "AR-15 Parts | Stock Parts | Stocks",
+                    "AR-15", "stock", "AR-15 Stocks", true, mapRepository);
+
+            upsert(merchant, "AR-15 Parts | Muzzle Devices | Muzzle Devices",
+                    "AR-15", "muzzle-device", "AR-15 Muzzle Devices", true, mapRepository);
+        });
+    }
+
+    // ---------------------------------------------------------------------
+    // Helper
+    // ---------------------------------------------------------------------
+
+    private void upsert(Merchant merchant,
+                        String rawCategory,
+                        String platform,
+                        String partRole,
+                        String canonicalCategory,
+                        boolean enabled,
+                        MerchantCategoryMapRepository mapRepository) {
+
+        MerchantCategoryMap map = mapRepository
+                .findByMerchantAndRawCategoryIgnoreCase(merchant, rawCategory)
+                .orElseGet(MerchantCategoryMap::new);
+
+        map.setMerchant(merchant);
+        map.setRawCategory(rawCategory);
+
+        // These fields are optional – null means “let heuristics or defaults handle it”
+        map.setPlatform(platform);
+        map.setPartRole(partRole);
+        map.setCanonicalCategory(canonicalCategory);
+        map.setEnabled(enabled);
+
+        mapRepository.save(map);
+    }
+}

src/main/java/group/goforward/ballistic/web/dto/ProductSummaryDto.java

@@ -0,0 +1,79 @@
+package group.goforward.ballistic.web.dto;
+
+import java.math.BigDecimal;
+
+public class ProductSummaryDto {
+
+    private String id;          // product UUID as string
+    private String name;
+    private String brand;
+    private String platform;
+    private String partRole;
+    private String categoryKey;
+    private BigDecimal price;   
+    private String buyUrl;
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getBrand() {
+        return brand;
+    }
+
+    public void setBrand(String brand) {
+        this.brand = brand;
+    }
+
+    public String getPlatform() {
+        return platform;
+    }
+
+    public void setPlatform(String platform) {
+        this.platform = platform;
+    }
+
+    public String getPartRole() {
+        return partRole;
+    }
+
+    public void setPartRole(String partRole) {
+        this.partRole = partRole;
+    }
+
+    public String getCategoryKey() {
+        return categoryKey;
+    }
+
+    public void setCategoryKey(String categoryKey) {
+        this.categoryKey = categoryKey;
+    }
+
+    public BigDecimal getPrice() {
+        return price;
+    }
+
+    public void setPrice(BigDecimal price) {
+        this.price = price;
+    }
+
+    public String getBuyUrl() {
+        return buyUrl;
+    }
+
+    public void setBuyUrl(String buyUrl) {
+        this.buyUrl = buyUrl;
+    }
+}

src/main/java/group/goforward/ballistic/web/mapper/ProductMapper.java

@@ -0,0 +1,30 @@
+package group.goforward.ballistic.web.mapper;
+
+import group.goforward.ballistic.model.Product;
+import group.goforward.ballistic.web.dto.ProductSummaryDto;
+
+import java.math.BigDecimal;
+
+public class ProductMapper {
+
+    public static ProductSummaryDto toSummary(Product product, BigDecimal price, String buyUrl) {
+        ProductSummaryDto dto = new ProductSummaryDto();
+
+        // Product ID -> String
+        dto.setId(String.valueOf(product.getId()));
+
+        dto.setName(product.getName());
+        dto.setBrand(product.getBrand() != null ? product.getBrand().getName() : null);
+        dto.setPlatform(product.getPlatform());
+        dto.setPartRole(product.getPartRole());
+
+        // Use rawCategoryKey from the Product entity
+        dto.setCategoryKey(product.getRawCategoryKey());
+
+        // Price + buy URL from offers
+        dto.setPrice(price);
+        dto.setBuyUrl(buyUrl);
+
+        return dto;
+    }
+}