---
tags: PHP, Laravel, Backend
---
# Laravel use notification when some data add

#### 今天就舉一個例子，如果有商家新增了，將通知給使用者

### 1. 下載laravel notofocation資料表

php artisan notifications:table

php artisan migrate

### 2. 創建notification

php artisan make:notification StoreAdded

### 3. 撰寫StoreAdded.php回傳程式碼

toarray函式，就是我們要發送的資料，會是一個json。
因為是使用database，所以要將via裡改成database

<?php

namespace App\Notifications;

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

class StoreAdded extends Notification
{
    use Queueable;

    /**
     * Create a new notification instance.
     *
     * @return void
     */
    public function __construct($store)
    {
        $this->store = $store;
    }

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

    /**
     * Get the mail representation of the notification.
     *
     * @param mixed $notifiable
     * @return \Illuminate\Notifications\Messages\MailMessage
     */
    public function toMail($notifiable)
    {
        return (new MailMessage)
            ->line('The introduction to the notification.')
            ->action('Notification Action', url('/'))
            ->line('Thank you for using our application!');
    }

    /**
     * Get the array representation of the notification.
     *
     * @param mixed $notifiable
     * @return array
     */
    public function toArray($notifiable)
    {
        return [
            'message' => $this->store->name . '加入囉！',
            'date' => Carbon::now()->format('m-d H:i'),
        ];
    }
}

### 4. 在User模型加入Notifiable

<?php

namespace App;

use App\Notifications\StoreAdded;
use Illuminate\Notifications\Notifiable;

class User extends Authenticatable implements MustVerifyEmail
{
    use Notifiable;

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'name',
        'email',
        'password',
    ];
    
    public function sendStoreAddedNotification($store)
    {
        $this->notify(new StoreAdded($store));
    }
}

### 5. 新增商家發送通知

將發送通知程式碼接在save後面，當新增成功才將通知加到資料庫，user可以設定要傳給哪些人

// 找到所有使用者發送
$users = User::all();

foreach ($users as $user) {
    $user->sendStoreAddedNotification($store);
}

### 6. 讀取通知

以下為讀取所有通知

$user=App\Models\User::find(1);

foreach ($user->notifications as $notification) {
    echo $notification->type;
}

以下為讀取未讀取通知

$user=App\Models\User::find(1);

foreach ($user->unreadNotifications as $notification) {
    echo $notification->type;
}

### 7. 將通知變成已讀取

可以一條一條設為已讀取

$user=App\Models\User::find(1);

foreach ($user->unreadNotifications as $notification) {
    $notification->markAsRead();
}

也可以一次把撈出來的user通知設為已讀取
`$user->unreadNotifications->markAsRead();`

取出單筆通知(不一定是個好方法)

$user = App\Models\User::find(1);
$notification = $user->notifications()->find($notificationid);
if($notification) {
    $notification->markAsRead();
}

刪除通知
`$user->notifications()->delete();`

### 補充

內建notification 模型放在這裡，可以使用普通數據庫查詢
`Illuminate\Notifications\DatabaseNotification`