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server/dukang-api/src/common/guards/optional-jwt-auth.guard.ts

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+import {
+  CanActivate,
+  ExecutionContext,
+  Injectable,
+} from '@nestjs/common';
+import { JwtService } from '@nestjs/jwt';
+import { CLIENT_APP_ACTOR_MAP, ClientApp } from '@dukang/shared-types';
+import type { AuthUser } from './jwt-auth.guard';
+
+@Injectable()
+export class OptionalJwtAuthGuard implements CanActivate {
+  constructor(private readonly jwtService: JwtService) {}
+
+  canActivate(context: ExecutionContext): boolean {
+    const req = context.switchToHttp().getRequest();
+    const auth = req.headers.authorization as string | undefined;
+    if (!auth?.startsWith('Bearer ')) {
+      return true;
+    }
+    try {
+      const payload = this.jwtService.verify(auth.slice(7));
+      const clientApp = req.headers['x-client-app'] as ClientApp;
+      if (!clientApp || payload.clientApp !== clientApp) return true;
+      const expectedActor = CLIENT_APP_ACTOR_MAP[clientApp];
+      if (payload.actorType !== expectedActor) return true;
+      req.user = {
+        actorType: payload.actorType,
+        actorId: BigInt(payload.actorId),
+        clientApp,
+        sub: payload.sub,
+        phoneVerified: !!payload.phoneVerified,
+      } satisfies AuthUser;
+    } catch {
+      /* ignore invalid token */
+    }
+    return true;
+  }
+}