支付层

assets/Scripts/chat18x/payment/PaymentService.ts

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+/**
+ * 支付对外的相关接口
+ * 
+ */
+import { EventTarget } from "cc"; 
+import { PaymentApi } from "./PaymentApi";
+import { PaymentOpenerFactory, type OpenStrategy } from "./PaymentOpener";
+import { PendingOrderRepo } from "./PendingOrderRepo";
+import PaymentPoller from "./PaymentPoller";
+import type { CreateOrderReq, PaymentResult, PendingOrder, OrderStatus } from "./types";
+import { ApiCode } from "../network/client/types";
+
+export const PaymentEvents = {
+  Started: "pay-started",     // { orderId }
+  UrlOpened: "pay-url-opened",
+  PollTick: "pay-poll-tick",  // { orderId, status }
+  Finished: "pay-finished",   // PaymentResult
+};
+
+export class PaymentService {
+  private static _I: PaymentService | null = null;
+  static get I() { return this._I ?? (this._I = new PaymentService()); }
+  private constructor() {}
+
+  private bus = new EventTarget();
+
+  on(event: string, cb: (...args: any[]) => void, target?: any) { 
+    this.bus.on(event, cb, target); 
+  }
+  off(event: string, cb: (...args: any[]) => void, target?: any) { 
+    this.bus.off(event, cb, target); 
+  }
+
+  /** 发起支付：创建订单→打开URL→回到App后开始轮询 */
+  async startPayment(req: CreateOrderReq, open: OpenStrategy = "system"): Promise<PaymentResult> {
+    // 下单
+    const create = await PaymentApi.I.createOrder(req);
+    if (create.code !== ApiCode.OK || !create.data) {
+      return { orderId: "", status: "FAILED", message: create.msg || "create order failed" };
+    }
+    const { orderId, payUrl, expireAt } = create.data;
+    this.bus.emit(PaymentEvents.Started, { orderId });
+
+    // 存为未决订单（用于异常恢复）
+    PendingOrderRepo.instance.add({ orderId, channel: req.channel, createdAt: Date.now(), expireAt, productId: req.productId });
+
+    // 打开支付页
+    await PaymentOpenerFactory.create(open).open(payUrl);
+    this.bus.emit(PaymentEvents.UrlOpened, { orderId });
+
+    //    等待回到前台（系统浏览器策略下）
+    //    - 如果是 inapp/minigame，可在 WebView/回跳时立即开始轮询；
+    //    - 这里给一个通用的“等待前台”方法（可用 Cocos 的 onShow/onHide 自行接入）
+    await this.waitAppResumeIfNeeded(open);
+
+    // 轮询
+    const poller = new PaymentPoller();
+    const data = await poller.poll(orderId, {
+      maxDurationMs: 2 * 60 * 1000,
+      startIntervalMs: 2000,
+      maxIntervalMs: 10000,
+      jitter: true,
+    }, (d) => this.bus.emit(PaymentEvents.PollTick, { orderId, status: d.status }));
+
+    // 产出结果
+    let res: PaymentResult;
+    if (!data) {
+      res = { orderId, status: "EXPIRED", message: "poll timeout" };
+    } else if (data.status === "SUCCESS") {
+      res = { orderId, status: "SUCCESS" };
+    } else {
+      res = { orderId, status: data.status as OrderStatus, message: data.failureReason };
+    }
+
+    PendingOrderRepo.instance.remove(orderId);
+    this.bus.emit(PaymentEvents.Finished, res);
+    return res;
+  }
+
+  /** App 回到前台后恢复未完成订单的轮询（在 onShow 时调用） */
+  async resumePending(): Promise<void> {
+    const all = PendingOrderRepo.instance.all();
+    for (const o of all) {
+      // 可以做去重/只处理未过期的
+      const r = await this.startPollingOnly(o.orderId);
+      if (r && r.status !== "PENDING" && r.status !== "CREATED") {
+        PendingOrderRepo.instance.remove(o.orderId);
+        this.bus.emit(PaymentEvents.Finished, {
+          orderId: o.orderId,
+          status: r.status as OrderStatus,
+          message: r.failureReason
+        } as PaymentResult);
+      }
+    }
+  }
+
+  /** 仅轮询（用于 resumePending 或手动刷新） */
+  private async startPollingOnly(orderId: string) {
+    const poller = new PaymentPoller();
+    return poller.poll(orderId, {
+      maxDurationMs: 2 * 60 * 1000,
+      startIntervalMs: 2000,
+      maxIntervalMs: 8000,
+      jitter: true,
+    });
+  }
+
+  /** 等待“回到前台”的占位实现：实际请在 App 生命周期里调用 resumePending() */
+  private async waitAppResumeIfNeeded(open: OpenStrategy) {
+    // 如果是系统浏览器，我们通常等“App 回到前台”再开始轮询；
+    // 这里简单 sleep 1s，实际项目请监听 Cocos 的 onShow/onHide 或平台回调。
+    if (open === "system") {
+      await new Promise(res => setTimeout(res, 1000));
+    }
+  }
+}
+export default PaymentService;