investbrain/app/Notifications/ImportFailedNotification.php

<?php

namespace App\Notifications;

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

class ImportFailedNotification extends Notification implements ShouldQueue
{
    use Queueable;

    /**
     * Create a new notification instance.
     */
    public function __construct(
        public string $errorMessage
    ) {}

    /**
     * Get the notification's delivery channels.
     *
     * @return array<int, string>
     */
    public function via(object $notifiable): array
    {
        return ['mail'];
    }

    /**
     * Get the mail representation of the notification.
     */
    public function toMail(object $notifiable): MailMessage
    {
        return (new MailMessage)
            ->greeting('Oh no!')
            ->subject('Your Investbrain import failed!')
            ->line('Heads up, your Investbrain import was unable to successfully complete. There were errors which caused the import to fail.')
            ->action('Try again?', route('import-export'))
            ->line('**Technical details:**')
            ->line($this->errorMessage);
    }

    /**
     * Get the array representation of the notification.
     *
     * @return array<string, mixed>
     */
    public function toArray(object $notifiable): array
    {
        return [
            //
        ];
    }
}