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2026-10-15 20:36:59 +08:00
commit 6bf949949c
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+import 'dart:async';
+
+import 'package:fluwx/fluwx.dart';
+import 'package:tobias/tobias.dart';
+
+import '../core/config/app_config.dart';
+import 'payment_service.dart';
+
+/// 支付宝/微信原生 SDK 调起封装（《03-接口文档》8.2 pay_params）
+///
+/// 服务端配置了商户密钥时 pay_params 为真实调起参数，此处调起原生 SDK；
+/// 未配置（dev）时服务端返回 dev_mock 占位，调用方应以轮询兜底代替调起。
+enum PayLaunchResult {
+  /// 渠道回调成功（仍需以服务端查单为准，避免客户端伪造）
+  success,
+
+  /// 用户主动取消
+  canceled,
+
+  /// 调起失败（未安装 App / 参数缺失 / SDK 报错）
+  failed,
+
+  /// pay_params 无有效调起参数（服务端未配置商户密钥）
+  unsupported,
+}
+
+class PayLauncher {
+  PayLauncher._();
+
+  static final _fluwx = Fluwx();
+
+  /// 微信调起等待回调的最长时间
+  static const _wechatTimeout = Duration(minutes: 5);
+
+  /// 支付宝调起：order_string 直接交给 SDK
+  static Future<PayLaunchResult> launchAlipay(RechargeOrderInfo order) async {
+    final orderString = order.payParams['order_string'] as String?;
+    if (orderString == null || orderString.isEmpty) {
+      return PayLaunchResult.unsupported;
+    }
+    try {
+      final result = await Tobias().pay(orderString);
+      return _mapAlipayStatus(result['resultStatus'] as String?);
+    } catch (_) {
+      return PayLaunchResult.failed;
+    }
+  }
+
+  /// 微信调起：registerApi → pay → 等待 SDK 回调
+  static Future<PayLaunchResult> launchWechat(RechargeOrderInfo order) async {
+    final params = order.payParams;
+    final appId = params['appid'] as String?;
+    final partnerId = params['partnerid'] as String?;
+    final prepayId = params['prepayid'] as String?;
+    final packageValue = params['package'] as String?;
+    final nonceStr = params['noncestr'] as String?;
+    final sign = params['sign'] as String?;
+    final timestamp = int.tryParse('${params['timestamp']}');
+    if (appId == null ||
+        appId.isEmpty ||
+        partnerId == null ||
+        partnerId.isEmpty ||
+        prepayId == null ||
+        prepayId.isEmpty ||
+        packageValue == null ||
+        packageValue.isEmpty ||
+        nonceStr == null ||
+        nonceStr.isEmpty ||
+        sign == null ||
+        sign.isEmpty ||
+        timestamp == null) {
+      return PayLaunchResult.unsupported;
+    }
+
+    final completer = Completer<PayLaunchResult>();
+    final cancelable = _fluwx.addSubscriber((response) {
+      if (response is WeChatPaymentResponse && !completer.isCompleted) {
+        completer.complete(_mapWechatErrCode(response.errCode));
+      }
+    });
+
+    try {
+      await _fluwx.registerApi(
+        appId: appId,
+        universalLink: AppConfig.wechatUniversalLink.isEmpty
+            ? null
+            : AppConfig.wechatUniversalLink,
+      );
+      final sent = await _fluwx.pay(
+        which: Payment(
+          appId: appId,
+          partnerId: partnerId,
+          prepayId: prepayId,
+          packageValue: packageValue,
+          nonceStr: nonceStr,
+          timestamp: timestamp,
+          sign: sign,
+        ),
+      );
+      if (!sent) return PayLaunchResult.failed;
+      return await completer.future.timeout(
+        _wechatTimeout,
+        onTimeout: () => PayLaunchResult.failed,
+      );
+    } catch (_) {
+      return PayLaunchResult.failed;
+    } finally {
+      cancelable.cancel();
+    }
+  }
+
+  /// 按支付方式分发（1支付宝 2微信）
+  static Future<PayLaunchResult> launch(RechargeOrderInfo order) {
+    return switch (order.payMethod) {
+      1 => launchAlipay(order),
+      2 => launchWechat(order),
+      _ => Future.value(PayLaunchResult.unsupported),
+    };
+  }
+
+  /// 支付宝 resultStatus：9000成功 6001用户取消 8000/8001处理中 其余失败
+  static PayLaunchResult _mapAlipayStatus(String? status) {
+    return switch (status) {
+      '9000' => PayLaunchResult.success,
+      '6001' => PayLaunchResult.canceled,
+      '8000' || '8001' => PayLaunchResult.success, // 处理中，交由服务端查单确认
+      _ => PayLaunchResult.failed,
+    };
+  }
+
+  /// 微信 errCode：0成功 -2用户取消 其余失败
+  static PayLaunchResult _mapWechatErrCode(int? errCode) {
+    return switch (errCode) {
+      0 => PayLaunchResult.success,
+      -2 => PayLaunchResult.canceled,
+      _ => PayLaunchResult.failed,
+    };
+  }
+}