feat: Phase 1-3 全部完成 — 沙盒增强、学情分析、学习路径

backend/src/modules/orders/orders.service.ts

@@ -0,0 +1,83 @@
+import { Injectable } from '@nestjs/common';
+import { PrismaService } from '../../prisma/prisma.service';
+import { PaymentService } from '../payment/payment.service';
+
+@Injectable()
+export class OrdersService {
+  constructor(
+    private prisma: PrismaService,
+    private paymentService: PaymentService,
+  ) {}
+
+  async create(userId: number, data: { amount: number; planType: string; payChannel?: string }) {
+    const orderNo = `YZR${Date.now()}${Math.random().toString(36).slice(2, 8).toUpperCase()}`;
+
+    const order = await this.prisma.order.create({
+      data: {
+        orderNo,
+        userId,
+        amount: data.amount,
+        planType: data.planType,
+        payChannel: data.payChannel || 'wxpay',
+      },
+    });
+
+    // If paying via WeChat, create unified order
+    if (data.payChannel === 'wxpay' || !data.payChannel) {
+      try {
+        const planLabels: Record<string, string> = {
+          MONTHLY: '宇之然AI月卡会员',
+          YEARLY: '宇之然AI年卡会员',
+        };
+        const payResult = await this.paymentService.createUnifiedOrder({
+          description: planLabels[data.planType] || '宇之然AI会员充值',
+          outTradeNo: orderNo,
+          amount: data.amount,
+        });
+        return { order, payResult };
+      } catch {
+        return { order, payResult: null };
+      }
+    }
+
+    return { order };
+  }
+
+  async findByUser(userId: number, params: { page?: number; pageSize?: number }) {
+    const page = Number(params.page ?? 1);
+    const pageSize = Number(params.pageSize ?? 20);
+    const [items, total] = await Promise.all([
+      this.prisma.order.findMany({
+        where: { userId },
+        skip: (page - 1) * pageSize,
+        take: pageSize,
+        orderBy: { createdAt: 'desc' },
+      }),
+      this.prisma.order.count({ where: { userId } }),
+    ]);
+    return { items, total, page, pageSize };
+  }
+
+  async findByOrderNo(orderNo: string) {
+    return this.prisma.order.findUnique({ where: { orderNo } });
+  }
+
+  async getCurrentSubscription(userId: number) {
+    const now = new Date();
+    return this.prisma.subscription.findFirst({
+      where: {
+        userId,
+        status: 'ACTIVE',
+        endDate: { gt: now },
+      },
+      orderBy: { endDate: 'desc' },
+    });
+  }
+
+  async getSubscriptions(userId: number) {
+    return this.prisma.subscription.findMany({
+      where: { userId },
+      orderBy: { createdAt: 'desc' },
+    });
+  }
+}