Page--user/src/main/java/com/example/web/service/NotificationService.java

package com.example.web.service;

import com.example.web.dto.NotificationDTO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.messaging.simp.SimpMessagingTemplate;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.time.ZoneOffset;

/**
 * WebSocket通知服务
 */
@Service
public class NotificationService {

    @Autowired
    private SimpMessagingTemplate messagingTemplate;

    /**
     * 广播通知给所有用户
     */
    public void broadcastNotification(NotificationDTO notification) {
        messagingTemplate.convertAndSend("/topic/notifications", notification);
    }

    /**
     * 发送通知给特定用户
     */
    public void sendNotificationToUser(String userId, NotificationDTO notification) {
        messagingTemplate.convertAndSendToUser(userId, "/queue/notifications", notification);
    }

    /**
     * 发送客户数据更新通知
     */
    public void sendCustomerUpdateNotification(String customerId, String message) {
        NotificationDTO notification = new NotificationDTO();
        notification.setType("CUSTOMER_UPDATE");
        notification.setTitle("客户数据更新");
        notification.setMessage(message);
        notification.setCustomerId(customerId);
        notification.setTimestamp(LocalDateTime.now(ZoneOffset.UTC));

        // 广播给所有用户
        messagingTemplate.convertAndSend("/topic/customers/" + customerId, notification);
    }
}