feat(flyer-import): add bundle support and new product fields

- Add bundle support with isBundle, bundleWeight, and bundleItems fields
- Add brand, weight, and comparisonUnit fields to FlyerItem model
- Update AI flyer parser to extract bundle information
- Add sanitization for bundle items in FlyerNormalizerService
- Update DTOs and interfaces to include new fields
- Add migration for new database fields
- Update tests to cover bundle item handling

backend/src/flyer-import/flyer-import.service.ts

@@ -18,18 +18,23 @@ import { TextExtractorService } from './services/text-extractor.service';
 import { AiFlyerParserService } from './services/ai-flyer-parser.service';
 import { FlyerNormalizerService } from './services/flyer-normalizer.service';
 
-type FlyerParseItem = {
-  rawName: string;
-  normalizedName: string;
-  category: string | null;
-  price: number | null;
-  priceUnit: string | null;
-  comparisonPrice: number | null;
-  comparisonUnit: string | null;
-  offerText: string | null;
-  confidence: number;
-  reasonCodes: string[];
-};
+type FlyerParseItem = {
+  rawName: string;
+  normalizedName: string;
+  brand: string | null;
+  category: string | null;
+  price: number | null;
+  priceUnit: string | null;
+  comparisonPrice: number | null;
+  comparisonUnit: string | null;
+  weight: string | null;
+  bundleWeight: string | null;
+  isBundle: boolean;
+  bundleItems: string[];
+  offerText: string | null;
+  confidence: number;
+  reasonCodes: string[];
+};
 
 type FlyerParseResponse = {
   retailer: 'willys';
@@ -54,7 +59,9 @@ type ProductLite = {
 
 @Injectable()
 export class FlyerImportService {
-  private readonly logger = new Logger(FlyerImportService.name);
+  private readonly logger = new Logger(FlyerImportService.name);
+  private readonly MAX_BUNDLE_ITEMS = 20;
+  private readonly MAX_BUNDLE_ITEM_LENGTH = 120;
 
   constructor(
     private readonly prisma: PrismaService,
@@ -105,12 +112,17 @@ export class FlyerImportService {
         flyerItemId: null,
         rawName: item.rawName,
         normalizedName: item.normalizedName,
+        brand: item.brand,
         category: item.category,
         categoryId: null,
         price,
         priceUnit,
         comparisonPrice,
         comparisonUnit,
+        weight: item.weight,
+        bundleWeight: item.bundleWeight,
+        isBundle: item.isBundle,
+        bundleItems: this.sanitizeBundleItems(item.bundleItems),
         offerText: item.offerText,
         isOffer: this.isOfferItem(item, signals.hasCampaignPattern),
         offerLimitText,
@@ -348,19 +360,24 @@ export class FlyerImportService {
     const savedItems: FlyerImportItem[] = [];
     for (const item of items) {
       const created = await this.prisma.flyerItem.create({
-        data: {
-          sessionId: session.id,
-            rawName: item.rawName,
-            normalizedName: item.normalizedName,
-            categoryHint: item.category,
-            categoryId: item.categoryId,
-            price: item.price != null ? new Prisma.Decimal(item.price) : null,
-          priceUnit: item.priceUnit,
-          comparisonPrice:
-            item.comparisonPrice != null ? new Prisma.Decimal(item.comparisonPrice) : null,
-          comparisonUnit: item.comparisonUnit,
-          offerText: item.offerText,
-          parseConfidence: item.parseConfidence,
+        data: {
+          sessionId: session.id,
+          rawName: item.rawName,
+          normalizedName: item.normalizedName,
+          brand: item.brand,
+          categoryHint: item.category,
+          categoryId: item.categoryId,
+          price: item.price != null ? new Prisma.Decimal(item.price) : null,
+          priceUnit: item.priceUnit,
+          comparisonPrice:
+            item.comparisonPrice != null ? new Prisma.Decimal(item.comparisonPrice) : null,
+          comparisonUnit: item.comparisonUnit,
+          weight: item.weight,
+          bundleWeight: item.bundleWeight,
+          isBundle: item.isBundle,
+          bundleItems: item.bundleItems,
+          offerText: item.offerText,
+          parseConfidence: item.parseConfidence,
           parseReasons: item.parseReasons,
           matchedProductId: item.matchedProductId,
           matchedProductName: item.matchedProductName,
@@ -592,18 +609,23 @@ export class FlyerImportService {
       const normalizedItems = this.normalizer.normalize(aiItems);
 
       // 4. Konvertera till intern FlyerParseItem-format
-      const items: FlyerParseItem[] = normalizedItems.map((item) => ({
-        rawName: item.rawName,
-        normalizedName: item.normalizedName,
-        category: item.categoryHint,
-        price: item.price,
-        priceUnit: item.priceUnit,
-        comparisonPrice: item.comparisonPrice,
-        comparisonUnit: item.comparisonUnit,
-        offerText: item.offerText,
-        confidence: item.parseConfidence,
-        reasonCodes: item.parseReasons,
-      }));
+      const items: FlyerParseItem[] = normalizedItems.map((item) => ({
+        rawName: item.rawName,
+        normalizedName: item.normalizedName,
+        brand: item.brand,
+        category: item.categoryHint,
+        price: item.price,
+        priceUnit: item.priceUnit,
+        comparisonPrice: item.comparisonPrice,
+        comparisonUnit: item.comparisonUnit,
+        weight: item.weight,
+        bundleWeight: item.bundleWeight,
+        isBundle: item.isBundle,
+        bundleItems: item.bundleItems,
+        offerText: item.offerText,
+        confidence: item.parseConfidence,
+        reasonCodes: item.parseReasons,
+      }));
 
       const warnings: string[] = [];
       if (items.length === 0) {
@@ -634,6 +656,7 @@ export class FlyerImportService {
     id: number;
     rawName: string;
     normalizedName: string;
+    brand: string | null;
     categoryHint: string | null;
     categoryId: number | null;
     categoryRef?: {
@@ -649,6 +672,10 @@ export class FlyerImportService {
     priceUnit: string | null;
     comparisonPrice: Prisma.Decimal | null;
     comparisonUnit: string | null;
+    weight: string | null;
+    bundleWeight: string | null;
+    isBundle: boolean;
+    bundleItems: Prisma.JsonValue | null;
     offerText: string | null;
     parseConfidence: number;
     parseReasons: Prisma.JsonValue | null;
@@ -677,12 +704,17 @@ export class FlyerImportService {
       flyerItemId: item.id,
       rawName: item.rawName,
       normalizedName: item.normalizedName,
+      brand: item.brand,
       category: categoryPath,
       categoryId: item.categoryId,
       price: item.price != null ? item.price.toNumber() : offerSignals.price,
       priceUnit: this.normalizeUnit(item.priceUnit) ?? offerSignals.priceUnit,
       comparisonPrice: item.comparisonPrice != null ? item.comparisonPrice.toNumber() : offerSignals.comparisonPrice,
       comparisonUnit: this.normalizeUnit(item.comparisonUnit) ?? offerSignals.comparisonUnit,
+      weight: item.weight,
+      bundleWeight: item.bundleWeight,
+      isBundle: item.isBundle,
+      bundleItems: this.sanitizeBundleItems(toStringArray(item.bundleItems)),
       offerText: item.offerText,
       isOffer:
         item.price != null
@@ -727,6 +759,7 @@ export class FlyerImportService {
       id: number;
       rawName: string;
       normalizedName: string;
+      brand: string | null;
       categoryHint: string | null;
       categoryId: number | null;
       categoryRef?: {
@@ -742,6 +775,10 @@ export class FlyerImportService {
       priceUnit: string | null;
       comparisonPrice: Prisma.Decimal | null;
       comparisonUnit: string | null;
+      weight: string | null;
+      bundleWeight: string | null;
+      isBundle: boolean;
+      bundleItems: Prisma.JsonValue | null;
       offerText: string | null;
       parseConfidence: number;
       parseReasons: Prisma.JsonValue | null;
@@ -793,4 +830,13 @@ export class FlyerImportService {
   private buildSourceStorageKey(userId: number, weekKey: string): string {
     return `flyer/${userId}/${weekKey}/${Date.now()}`;
   }
+
+  private sanitizeBundleItems(items: string[] | null | undefined): string[] {
+    if (!Array.isArray(items)) return [];
+    return items
+      .map((entry) => String(entry).trim())
+      .filter(Boolean)
+      .slice(0, this.MAX_BUNDLE_ITEMS)
+      .map((entry) => entry.slice(0, this.MAX_BUNDLE_ITEM_LENGTH));
+  }
 }