Laravel PHP Framework

Laravel Auto Presenter 是一套用在 view 裡的 decorates objects,搭配資料庫時,如果有需要組合或整合欄位來顯示相關資訊,這套就非常適合使用在 Laravel View 裡,如果不是透過 Laravel Auto Presenter,開發者也可以利用 Laravel Accessors & Mutators 來實現這方法,只是這要寫在 Model 層,寫法如下,此做法寫起來蠻亂的,而且也並不是每個地方都需要擴充這些欄位。

/**
 * The accessors to append to the model's array form.
 *
 * @var array
 */
protected $appends = [
    'is_twitter',
];

/**
 * Get the user's is_twitter flag.
 *
 * @param  string  $value
 * @return string
 */
public function getIsTwitterAttribute()
{
    return (bool) ($this->attributes['options'] & self::$OPTIONS['is_twitter']);
}

如果是使用 Laravel Auto Presenter 則寫法如下

<?php  namespace App\Models\Presenters;

use App\Models\User;
use Illuminate\Contracts\Support\Arrayable;
use McCool\LaravelAutoPresenter\BasePresenter;

class UserPresenter extends BasePresenter implements Arrayable
{
    public function __construct(User $resource)
    {
        $this->wrappedObject = $resource;
    }

    public function isTwitter()
    {
        return (bool) ($this->wrappedObject->info->options & self::$OPTIONS['is_twitter']);
    }

    /**
     * Get the instance as an array.
     *
     * @return array
     */
    public function toArray()
    {
        return [
            'id'        => $this->wrappedObject->id,
            'isTwitter' => $this->isTwitter(),
            'avatarUrl' => $this->avatarUrl(),
        ];
    }
}

但是使用在 Laravel View 裡面都可以正確拿到 isTwitter 欄位沒問題,如果要用在 RESTFul + 前端 ReactJS 的話,則要透過 Laravel Facades 來實現,加上 AutoPresenter::decorate 就可以在 Controller 內使用 AutoPresenter 了。

<?php

use McCool\LaravelAutoPresenter\Facades\AutoPresenter;

class MessageController extends Controller
{
    /**
     * @var Repository
     */
    private $user;

    public function __construct(UserRepository $user)
    {
        $this->user = $user;
    }

    public function index(Request $request)
    {
        $user = $this->user->with('info')->find(\Auth::id());
        $state = collect([
            'user' => AutoPresenter::decorate($user),
        ]);

        return $state;
    }
}