mead-blog/app/Notifications/ArticleReplied.php

<?php

namespace App\Notifications;

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

class ArticleReplied extends Notification implements ShouldQueue
{
    use Queueable;

    public $reply;

    /**
     * Create a new notification instance.
     *
     * @return void
     */
    public function __construct(Reply $reply)
    {
        // 注入回复实体，方便 toDatabase 方法中的使用
        $this->reply = $reply;
    }

    /**
     * Get the notification's delivery channels.
     *
     * @param  mixed  $notifiable
     * @return array
     */
    public function via($notifiable)
    {
        // 开启通知的频道
        // return ['database', 'mail'];
        return ['database'];
    }

    public function toDatabase($notifiable)
    {
        $article = $this->reply->article;
        $link =  $article->link();

        // 存入数据库里的数据
        return [
            'reply_id' => $this->reply->id,
            'reply_content' => $this->reply->content,
            'user_id' => $this->reply->user->id,
            'user_name' => $this->reply->user->name,
            'article_link' => $link,
            'article_id' => $article->id,
            'article_title' => $article->title,
        ];
    }

    /**
     * Get the mail representation of the notification.
     *
     * @param  mixed  $notifiable
     * @return \Illuminate\Notifications\Messages\MailMessage
     */
    public function toMail($notifiable)
    {
        $url = $this->reply->article->link(['#reply' . $this->reply->id]);
        return (new MailMessage)
                    ->line('你的文章有新回复！')
                    ->action('查看回复', $url);
    }

    /**
     * Get the array representation of the notification.
     *
     * @param  mixed  $notifiable
     * @return array
     */
    public function toArray($notifiable)
    {
        return [
            //
        ];
    }
}