added Model classes

backend/api/src/manager/UserDataPgPromiseSerializer.ts

@@ -0,0 +1,19 @@
+import {UserData} from "../model/UserData.js";
+import {UserDataSerializer} from "./UserDataSerializer.js";
+
+export class UserDataPgPromiseSerializer implements UserDataSerializer {
+    deserialize(userData: UserData): any {
+        throw new Error("Method not implemented")
+    }
+
+    serialize(data: any): UserData {
+        return {
+            username: data.username,
+            highscore: data.highscore,
+            totalScore: data.total_score,
+            totalPlaytime: data.total_playtime,
+            averageScore: data.averageScore,
+            gamesPlayed: data.games_played,
+        }
+    }
+}