vendix-multi-tenant-context

// apps/backend/src/common/middleware/domain-resolver.middleware.ts
async use(req: Request, res: Response, next: NextFunction) {
  const hostname = this.extractHostname(req);
  const x_store_id = req.headers['x-store-id'];

  // Priority 1: x-store-id header (development/manual override)
  if (x_store_id) {
    req['domain_context'] = { store_id: Number(x_store_id) };
    return next();
  }

  // Priority 2: Hostname resolution (production)
  const domain = await this.publicDomains.resolveDomain(hostname);
  req['domain_context'] = {
    store_id: domain.store_id,
    organization_id: domain.organization_id,
  };
  next();
}

req["domain_context"] = { store_id, organization_id };

// apps/backend/src/common/interceptors/request-context.interceptor.ts
intercept(context: ExecutionContext, next: CallHandler): Observable<any> {
  const req = context.switchToHttp().getRequest();
  const user = req.user;
  const domain_context = req['domain_context'];

  const contextObj: RequestContext = {
    user_id: user?.id,
    organization_id: user?.organization_id || domain_context?.organization_id,
    store_id: user?.store_id || domain_context?.store_id,
    is_super_admin: roles.includes('super_admin'),
    // ...
  };

  return RequestContextService.asyncLocalStorage.run(contextObj, () => {
    return next.handle();
  });
}

// apps/backend/src/common/context/request-context.service.ts
export class RequestContextService {
  public static asyncLocalStorage = new AsyncLocalStorage<RequestContext>();

  static getContext(): RequestContext | undefined {
    return this.asyncLocalStorage.getStore();
  }

  static getStoreId(): number | undefined {
    return this.getContext()?.store_id;
  }
}

// apps/backend/src/prisma/services/ecommerce-prisma.service.ts
async findMany(args: any) {
  const store_id = RequestContextService.getStoreId();
  if (!store_id) throw new ForbiddenException('No store context found');

  return this.prisma.product.findMany({
    ...args,
    where: { ...args.where, store_id }
  });
}