审查生成的 Ktor 订单路由

fun Route.orderRoutes(
    service: OrderService,
    notifications: Notifications,
) {
    post("/orders") {
        val request = call.receive<CreateOrderRequest>()
        val tenantId = call.request.headers["X-Tenant"]!!
        val key = call.request.headers["Idempotency-Key"]

        val existing = service.findByKey(key)
        if (existing != null) return@post call.respond(existing)

        val order = service.create(tenantId, request)
        GlobalScope.launch {
            notifications.send(order)
        }

        call.respond(HttpStatusCode.Created, order)
    }
}