feat: 接入微信小程序支付

miniprogram/pages/wechat-pay/index.js

@@ -0,0 +1,83 @@
+function parsePayParams(rawValue) {
+  try {
+    const params = JSON.parse(decodeURIComponent(String(rawValue || '')));
+    if (!params || typeof params !== 'object') {
+      return null;
+    }
+    return params;
+  } catch (error) {
+    console.error('[wechat-pay] parse params failed', error);
+    return null;
+  }
+}
+
+function requestPayment(payParams) {
+  return new Promise((resolve) => {
+    wx.requestPayment({
+      timeStamp: String(payParams.timeStamp || ''),
+      nonceStr: String(payParams.nonceStr || ''),
+      package: String(payParams.package || ''),
+      signType: payParams.signType || 'RSA',
+      paySign: String(payParams.paySign || ''),
+      success() {
+        resolve('success');
+      },
+      fail(error) {
+        const errMsg = error && error.errMsg ? error.errMsg : '';
+        resolve(/cancel/i.test(errMsg) ? 'cancel' : 'fail');
+      },
+    });
+  });
+}
+
+function appendPayResult(url, requestId, status) {
+  const value = `${requestId}:${status}`;
+  const hashIndex = String(url || '').indexOf('#');
+  const baseUrl =
+    hashIndex >= 0 ? String(url).slice(0, hashIndex) : String(url || '');
+  const rawHash = hashIndex >= 0 ? String(url).slice(hashIndex + 1) : '';
+  const params = new URLSearchParams(rawHash);
+  params.set('wx_pay_result', value);
+  return `${baseUrl}#${params.toString()}`;
+}
+
+function notifyPreviousWebView(requestId, status) {
+  const pages = getCurrentPages();
+  const previousPage = pages.length >= 2 ? pages[pages.length - 2] : null;
+  if (previousPage && typeof previousPage.setData === 'function') {
+    previousPage.setData({
+      webViewUrl: appendPayResult(
+        previousPage.data.webViewUrl,
+        requestId,
+        status,
+      ),
+    });
+  }
+}
+
+Page({
+  data: {
+    title: '正在拉起支付',
+    errorMessage: '',
+  },
+
+  async onLoad(query) {
+    const requestId = String(query.requestId || '');
+    const payParams = parsePayParams(query.payParams);
+    if (!requestId || !payParams) {
+      this.setData({
+        title: '支付失败',
+        errorMessage: '缺少支付参数。',
+      });
+      return;
+    }
+
+    const status = await requestPayment(payParams);
+    notifyPreviousWebView(requestId, status);
+    wx.navigateBack();
+  },
+
+  handleBack() {
+    wx.navigateBack();
+  },
+});

miniprogram/pages/wechat-pay/index.json

@@ -0,0 +1,3 @@
+{
+  "navigationBarTitleText": "微信支付"
+}

miniprogram/pages/wechat-pay/index.wxml

@@ -0,0 +1,11 @@
+<view class="pay-screen">
+  <view class="pay-card">
+    <view class="pay-title">{{title}}</view>
+    <view wx:if="{{errorMessage}}" class="pay-text pay-text--danger">
+      {{errorMessage}}
+    </view>
+    <button wx:if="{{errorMessage}}" class="ghost-button" bindtap="handleBack">
+      返回
+    </button>
+  </view>
+</view>

miniprogram/pages/wechat-pay/index.wxss

@@ -0,0 +1,48 @@
+.pay-screen {
+  min-height: 100vh;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 48rpx;
+  background: #0b0f14;
+  box-sizing: border-box;
+}
+
+.pay-card {
+  width: 100%;
+  max-width: 560rpx;
+  padding: 36rpx;
+  border: 1rpx solid rgba(255, 255, 255, 0.14);
+  border-radius: 12rpx;
+  background: rgba(255, 255, 255, 0.06);
+  box-sizing: border-box;
+}
+
+.pay-title {
+  font-size: 34rpx;
+  font-weight: 600;
+  line-height: 1.35;
+  color: #f5f7fb;
+}
+
+.pay-text {
+  margin-top: 16rpx;
+  font-size: 26rpx;
+  line-height: 1.55;
+  color: rgba(245, 247, 251, 0.72);
+}
+
+.pay-text--danger {
+  color: #ffb4a9;
+}
+
+.ghost-button {
+  margin-top: 28rpx;
+  width: 100%;
+  border-radius: 8rpx;
+  border: 1rpx solid rgba(255, 255, 255, 0.24);
+  background: transparent;
+  color: rgba(245, 247, 251, 0.86);
+  font-size: 26rpx;
+  line-height: 2.6;
+}