Merge commit 'fcf1d45522e3ba6e6faf2590b60f2db1ef90e73c' into dev_jacy

server/dukang-api/src/modules/analytics/analytics.service.ts

@@ -1,6 +1,7 @@
-import { Injectable } from '@nestjs/common';
+import { Injectable, NotFoundException } from '@nestjs/common';
 import type { ClientApp } from '@prisma/client';
 import { PrismaService } from '../../common/prisma/prisma.module';
+import { serializeBigInt } from '../../common/decorators/current-user.decorator';
 
 export type TrackEventInput = {
   eventName: string;
@@ -84,4 +85,42 @@ export class AnalyticsService {
       extraJson: event.extraJson as never,
     };
   }
+  /** 扫码归因：始终累加 scan_count；已登录用户首次写入 user_promo_attribution */
+  async touchPromo(promoCode: string, userId?: bigint) {
+    const code = promoCode.trim().toUpperCase();
+    const promo = await this.prisma.commonPromoCode.findUnique({ where: { code } });
+    if (!promo || promo.status !== 'ACTIVE') {
+      throw new NotFoundException('推广码无效或已停用');
+    }
+
+    await this.prisma.commonPromoCode.update({
+      where: { id: promo.id },
+      data: { scanCount: { increment: 1 } },
+    });
+
+    let attributed = false;
+    if (userId) {
+      const existing = await this.prisma.userPromoAttribution.findUnique({
+        where: { userId },
+      });
+      if (!existing) {
+        await this.prisma.userPromoAttribution.create({
+          data: {
+            userId,
+            promoCodeId: promo.id,
+            channelName: promo.name,
+            firstTouchAt: new Date(),
+          },
+        });
+        attributed = true;
+      }
+    }
+
+    return serializeBigInt({
+      promoCode: promo.code,
+      channelName: promo.name,
+      attributed,
+    });
+  }
 }
+