fix(catalog): repair search offer ids

Emulator/src/main/java/com/eu/habbo/habbohotel/catalog/CatalogItem.java

@@ -174,6 +174,14 @@ public class CatalogItem implements ISerialize, Runnable, Comparable<CatalogItem
         return this.offerId;
     }
 
+    public int getSearchOfferId() {
+        if (this.offerId > 0) {
+            return this.offerId;
+        }
+
+        return haveOffer(this) ? this.id : -1;
+    }
+
     public boolean isLimited() {
         return this.limitedStack > 0;
     }

Emulator/src/main/java/com/eu/habbo/habbohotel/catalog/CatalogManager.java

@@ -494,10 +494,11 @@ public class CatalogManager {
                     item = new CatalogItem(set);
                     page.addItem(item);
 
-                    if (item.getOfferId() != -1) {
-                        page.addOfferId(item.getOfferId());
+                    int searchOfferId = item.getSearchOfferId();
+                    if (searchOfferId != -1) {
+                        page.addOfferId(searchOfferId);
 
-                        this.offerDefs.put(item.getOfferId(), item.getId());
+                        this.offerDefs.put(searchOfferId, item.getId());
                     }
                 } else
                     item.update(set);

Emulator/src/main/java/com/eu/habbo/messages/incoming/catalog/CatalogSearchedItemEvent.java

@@ -12,10 +12,15 @@ public class CatalogSearchedItemEvent extends MessageHandler {
     public void handle() throws Exception {
         int offerId = this.packet.readInt();
 
-        int pageId = Emulator.getGameEnvironment().getCatalogManager().offerDefs.get(offerId);
+        int catalogItemId = Emulator.getGameEnvironment().getCatalogManager().offerDefs.get(offerId);
 
-        if (pageId != 0) {
-            CatalogPage page = Emulator.getGameEnvironment().getCatalogManager().getCatalogPage(Emulator.getGameEnvironment().getCatalogManager().getCatalogItem(pageId).getPageId());
+        if (catalogItemId != 0) {
+            CatalogItem requestedItem = Emulator.getGameEnvironment().getCatalogManager().getCatalogItem(catalogItemId);
+            if (requestedItem == null) {
+                return;
+            }
+
+            CatalogPage page = Emulator.getGameEnvironment().getCatalogManager().getCatalogPage(requestedItem.getPageId());
 
             if (page != null) {
                 TIntObjectIterator<CatalogItem> iterator = page.getCatalogItems().iterator();
@@ -25,7 +30,7 @@ public class CatalogSearchedItemEvent extends MessageHandler {
 
                     CatalogItem item = iterator.value();
 
-                    if (item.getOfferId() == offerId) {
+                    if (item.getSearchOfferId() == offerId) {
                         this.client.sendResponse(new CatalogSearchResultComposer(item));
                         return;
                     }

Emulator/src/test/java/com/eu/habbo/messages/incoming/catalog/CatalogSearchOfferIdContractTest.java

@@ -0,0 +1,55 @@
+package com.eu.habbo.messages.incoming.catalog;
+
+import org.junit.jupiter.api.Test;
+
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class CatalogSearchOfferIdContractTest {
+    private static String source(String path) throws Exception {
+        return Files.readString(Path.of(path));
+    }
+
+    @Test
+    void catalogItemsExposeStableSearchOfferIdWhenDatabaseOfferIdIsMissing() throws Exception {
+        String source = source("src/main/java/com/eu/habbo/habbohotel/catalog/CatalogItem.java");
+
+        int method = source.indexOf("public int getSearchOfferId()");
+        int rawGuard = source.indexOf("this.offerId > 0", method);
+        int fallback = source.indexOf("return haveOffer(this) ? this.id : -1", rawGuard);
+
+        assertTrue(method > -1, "CatalogItem should expose a search-safe offer id");
+        assertTrue(rawGuard > method, "CatalogItem should preserve valid positive database offer ids");
+        assertTrue(fallback > rawGuard,
+                "CatalogItem should fall back to catalog item id when offer_id is missing but the item can be offered");
+    }
+
+    @Test
+    void catalogManagerIndexesSearchOfferIdsInsteadOfRawOfferIds() throws Exception {
+        String source = source("src/main/java/com/eu/habbo/habbohotel/catalog/CatalogManager.java");
+
+        int searchOffer = source.indexOf("int searchOfferId = item.getSearchOfferId()");
+        int addOffer = source.indexOf("page.addOfferId(searchOfferId)", searchOffer);
+        int offerDefs = source.indexOf("this.offerDefs.put(searchOfferId, item.getId())", addOffer);
+
+        assertTrue(searchOffer > -1, "CatalogManager should calculate the runtime search offer id");
+        assertTrue(addOffer > searchOffer, "CatalogManager should expose runtime search offer ids in catalog pages");
+        assertTrue(offerDefs > addOffer, "CatalogManager should map runtime search offer ids back to catalog items");
+        assertTrue(!source.contains("this.offerDefs.put(item.getOfferId(), item.getId())"),
+                "CatalogManager must not index raw -1 offer ids for catalog search");
+    }
+
+    @Test
+    void catalogSearchLookupResolvesCatalogItemIdsAndComparesSearchOfferIds() throws Exception {
+        String source = source("src/main/java/com/eu/habbo/messages/incoming/catalog/CatalogSearchedItemEvent.java");
+
+        assertTrue(source.contains("int catalogItemId ="),
+                "Catalog search lookup should name offerDefs values as catalog item ids");
+        assertTrue(source.contains("getCatalogItem(catalogItemId)"),
+                "Catalog search should resolve the mapped catalog item directly");
+        assertTrue(source.contains("item.getSearchOfferId() == offerId"),
+                "Catalog search should compare runtime search offer ids, not raw database offer ids");
+    }
+}