46 lines
1.2 KiB
JavaScript
46 lines
1.2 KiB
JavaScript
import { RNG } from '../utils/RNG.js';
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export class PackManager {
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constructor(packsData, cardManager) {
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this.packs = new Map(packsData.map(p => [p.id, p]));
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this.cardManager = cardManager;
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}
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getPack(id) {
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return this.packs.get(id);
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}
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getAllPacks() {
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return [...this.packs.values()];
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}
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openPack(packId, save) {
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const pack = this.getPack(packId);
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if (!pack) return null;
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const rng = new RNG(Date.now() ^ (Math.random() * 0xffffffff));
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const results = [];
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for (let i = 0; i < pack.cardCount; i++) {
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const rarity = this._rollRarity(pack.dropRates, rng);
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const pool = this.cardManager.getAllCards().filter(c =>
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c.rarity === rarity &&
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c.type !== 'commander' &&
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pack.cardPool.includes(c.faction)
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);
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if (pool.length === 0) continue;
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const card = pool[rng.nextInt(0, pool.length - 1)];
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results.push(card);
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}
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return results;
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}
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_rollRarity(dropRates, rng) {
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const r = rng.next();
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let cumulative = 0;
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for (const [rarity, rate] of Object.entries(dropRates)) {
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cumulative += rate;
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if (r < cumulative) return rarity;
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}
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return 'common';
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}
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}
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