ss-visit/app/Notifications/CancelEmailNotify.php

<?php

namespace App\Notifications;

use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Notifications\Messages\MailMessage;
use Illuminate\Notifications\Notification;

class CancelEmailNotify extends Notification
{
    use Queueable;

    protected $visitData;

    /**
     * Create a new notification instance.
     *
     * @param array $visitData
     */
    public function __construct($visitData)
    {
        $this->visitData = $visitData;
    }

    /**
     * Get the notification's delivery channels.
     *
     * @param mixed $notifiable
     * @return array
     */
    public function via($notifiable)
    {
        return ['mail'];
    }

    /**
     * Get the mail representation of the notification.
     *
     * @param mixed $notifiable
     * @return \Illuminate\Notifications\Messages\MailMessage
     */
    public function toMail($notifiable)
    {
        $visitData = $this->visitData;

        return (new MailMessage)
            ->subject('拜访预约取消通知 - ' . $visitData['name'])
            ->greeting('您好 ' . $notifiable->name . '，')
            ->line('访客 ' . $visitData['name'] . ' 原预约于 ' . $visitData['date'] . ' 的拜访已取消。')
            ->line('访客联系电话：' . $visitData['mobile'])
            ->line('拜访事由：' . ($visitData['reason'] ?? '无'))
            ->line('如有疑问，请联系访客确认。');
    }
}