Created card and started dashboard

apollo-frontend/src/app/userdata.service.ts

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+import { Injectable } from '@angular/core';
+import { Card, DbService } from './db.service';
+
+export enum Medal {
+    None,
+    Bronze,
+    Silfer,
+    Gold,
+}
+export interface MinigameUserdata {
+    played: boolean;
+    medal: Medal;
+}
+export interface MinigameUserdataWithId extends MinigameUserdata {
+    cardId: string;
+}
+
+@Injectable({
+    providedIn: 'root'
+})
+export class UserdataService {
+    getMinigameUserdata(id: string): MinigameUserdata | undefined {
+        if (!localStorage['minigame-' + id]) {
+            const a = {
+                played: false,
+                medal: Medal.None,
+                cardId: id,
+            };
+
+            localStorage['minigame-' + id] = JSON.stringify(a);
+            return a;
+        }
+        return localStorage['minigame-' + id] as MinigameUserdata | undefined;
+    }
+    getAllMinigameUserdata(): MinigameUserdata[] {
+        const minigames: MinigameUserdata[] = [];
+
+        for (const key in localStorage) {
+            if (Object.prototype.hasOwnProperty.call(localStorage, key)) {
+                const minigameUserdata = JSON.parse(localStorage[key]);
+                if (key.startsWith('minigame-')) minigames.push(minigameUserdata);
+            }
+        }
+
+        return minigames;
+    }
+
+    getOwnedCardIds(): string[] {
+        const cardsRaw = localStorage.cards;
+        if (cardsRaw) return JSON.parse(cardsRaw);
+        else {
+            localStorage.cards = [];
+            return [];
+        }
+    }
+    getOwnedCards(): Card[] {
+        return this.getOwnedCardIds().map(v => this.db.getCard(v));
+    }
+
+    saveMinigameUserdata(id: string, userdata: MinigameUserdata): void {
+        const saved = {...userdata, cardId: id};
+
+        localStorage['minigame-' + id] = saved;
+    }
+    addCard(id: string): void {
+        let saved = this.getOwnedCardIds();
+        if (saved.includes(id)) throw new Error("Can't add a card that already exists!");
+        saved = [...saved, id];
+
+        localStorage.cards = saved;
+    }
+
+    constructor(
+        private db: DbService,
+    ) { }
+}