load altart mapping as well

src/card-data/card-data.service.ts

@@ -81,9 +81,15 @@ export class CardDataService {
   private cardIdLock = new BetterLock();
 
   private ygocdbExisting = new Map<number, CardData>();
+  private ygocdbAltArts = new Map<number, number>(); // alt art id -> card id
 
   async loadYGOCDBData() {
-    const content = await fs.promises.readFile('./ygocdb-data/cards.json');
+    const loadJson = async (name: string) => {
+      const content = await fs.promises.readFile(`./ygocdb-data/${name}.json`);
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-return
+      return JSON.parse(content.toString('utf-8'));
+    };
+    const content = await loadJson('cards');
     const cards: YGOCDBData[] = Object.values(
       JSON.parse(content.toString('utf-8')),
     );
@@ -94,14 +100,29 @@ export class CardDataService {
       if (!data) continue;
       this.ygocdbExisting.set(card.id, data);
     }
+
+    this.logger.log(
+      `Loaded ${this.ygocdbExisting.size} valid cards from YGOCDB data`,
+    );
+
+    // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+    const altArts: Record<string, number[]> = await loadJson('altarts');
+    this.ygocdbAltArts.clear();
+    for (const [key, ids] of Object.entries(altArts)) {
+      const originalId = parseInt(key, 10);
+      for (const id of ids) {
+        this.ygocdbAltArts.set(id, originalId);
+      }
+    }
+    this.logger.log(
+      `Loaded ${this.ygocdbAltArts.size} alt art mappings from YGOCDB data`,
+    );
   }
 
   async onApplicationBootstrap() {
     try {
       await this.loadYGOCDBData();
-      this.logger.log(
-        `Loaded ${this.ygocdbExisting.size} cards from YGOCDB data`,
-      );
+      this.logger.log(`Loaded YGOCDB data`);
     } catch (e) {
       this.logger.warn(`Failed to load YGOCDB data: ${e.message}`);
     }
@@ -110,6 +131,11 @@ export class CardDataService {
   async getCardData(id: number): Promise<CardData> {
     if (this.ygocdbExisting.has(id)) {
       return this.ygocdbExisting.get(id);
+    } else if (this.ygocdbAltArts.has(id)) {
+      const originalId = this.ygocdbAltArts.get(id);
+      if (this.ygocdbExisting.has(originalId)) {
+        return this.ygocdbExisting.get(originalId);
+      }
     }
     return this.cardIdLock.acquire(id.toString(), () =>
       this.aragami.cache(CardData, id.toString(), () => this.fetchCardData(id)),