feat: 更新支付模块 (Stripe/PayPal/PingPong) 和 uni-app 配置

backend/app/api/v1/credits.py

@@ -1,3 +1,4 @@
+import json
 from fastapi import APIRouter, Depends, HTTPException, Query
 from pydantic import BaseModel
 from typing import Optional
@@ -15,6 +16,13 @@ class PurchaseRequest(BaseModel):
     pay_type: str = "alipay"
 
 
+class StripePurchaseRequest(BaseModel):
+    package_id: str
+    gateway: str = "stripe"
+    success_url: str = "https://trade.yuzhiran.com/workspace/credits?pay=success"
+    cancel_url: str = "https://trade.yuzhiran.com/workspace/credits?pay=cancel"
+
+
 class SubscribeRequest(BaseModel):
     plan_id: str
     pay_type: str = "alipay"
@@ -103,6 +111,55 @@ async def subscribe_plan(
     return order
 
 
+@router.post("/stripe-purchase")
+async def stripe_purchase(
+    req: StripePurchaseRequest,
+    user_id: str = Depends(get_current_user_id),
+    db: AsyncSession = Depends(get_db),
+):
+    svc = CreditService(db)
+    packages = await svc.get_packages()
+    pkg = next((p for p in packages if p["id"] == req.package_id), None)
+    if not pkg:
+        raise HTTPException(status_code=404, detail="次数包不存在")
+
+    from app.services.payment import get_gateway, gen_order_no
+
+    price_usd = pkg.get("price_usd") or round(pkg["price"] / 7, 2)
+    amount_cents = int(price_usd * 100)
+
+    order_no = gen_order_no(user_id)
+    gw = get_gateway(req.gateway)
+    sep = '&' if '?' in req.success_url else '?'
+    success_url = f"{req.success_url}{sep}order_id={order_no}"
+    gw_result = await gw.create_order(
+        order_no, amount_cents, f"{pkg['name_en']} ({pkg['credits']} credits)",
+        pay_type=req.gateway,
+        success_url=success_url,
+        cancel_url=req.cancel_url,
+    )
+
+    from app.models.payment_transaction import PaymentTransaction
+    txn = PaymentTransaction(
+        user_id=user_id, order_no=order_no, plan="credit_purchase",
+        amount=price_usd, gateway=req.gateway, pay_type=req.gateway,
+        status="pending", description=json.dumps({"credits": pkg["credits"]}),
+        gateway_order_no=gw_result.get("session_id", ""),
+    )
+    db.add(txn)
+    await db.flush()
+
+    return {
+        "status": "pending",
+        "order_id": order_no,
+        "session_url": gw_result.get("session_url"),
+        "session_id": gw_result.get("session_id"),
+        "amount": price_usd,
+        "currency": "USD",
+        "gateway": req.gateway,
+    }
+
+
 @router.post("/cancel-subscription")
 async def cancel_subscription(
     user_id: str = Depends(get_current_user_id),