58 lines
1.8 KiB
TypeScript
58 lines
1.8 KiB
TypeScript
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/**
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* 本地持久化未决订单，断线/重启后可恢复
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*
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*/
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import { sys } from "cc";
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import type { PendingOrder } from "./types";
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export class PendingOrderRepo {
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private static _instance: PendingOrderRepo | null = null; // 私有静态实例
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private static KEY = "pay:pending_orders"; // 本地存储的 key
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private cache: PendingOrder[] | null = null; // 本地缓存
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// 私有构造函数，禁止外部直接实例化
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private constructor() {}
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// 获取唯一实例
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public static get instance(): PendingOrderRepo {
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if (!PendingOrderRepo._instance) {
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PendingOrderRepo._instance = new PendingOrderRepo();
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}
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return PendingOrderRepo._instance;
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}
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// 加载数据
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private load(): PendingOrder[] {
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if (this.cache) return this.cache; // 如果有缓存，直接返回
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const raw = sys.localStorage.getItem(PendingOrderRepo.KEY); // 从 localStorage 获取数据
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if (!raw) return (this.cache = []); // 如果没有数据，返回空数组
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try { return (this.cache = JSON.parse(raw) || []); } catch { return (this.cache = []); } // 解析失败时返回空数组
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}
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// 保存数据
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private save(list: PendingOrder[]) {
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this.cache = list; // 更新缓存
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sys.localStorage.setItem(PendingOrderRepo.KEY, JSON.stringify(list)); // 存储到 localStorage
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}
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// 添加未决订单
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add(o: PendingOrder) {
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const list = this.load();
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list.unshift(o); // 将新订单添加到数组前面
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this.save(list.slice(0, 10)); // 保存最多 10 条订单
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}
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// 删除指定订单
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remove(orderId: string) {
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const list = this.load().filter(x => x.orderId !== orderId); // 过滤掉指定订单
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this.save(list); // 更新数据
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}
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// 获取所有未决订单
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all(): PendingOrder[] {
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return this.load(); // 返回加载的数据
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}
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}
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