在工厂级Laravel 5.4前面实施Facade

Question

For some context - earlier today I was struggling to figure out how to implement a facade similar to Cache - where I could set a provider (like disk()), but also have a generic fall back provider when not supplied.

Now, I got the basic infrastructure working, but I think my implementation is nasty. Having call default() or provider() just stinks. However, there is a concept or something I'm missing to fill in the gaps here.

Implementing similar functionality to Cache::disk('x') in Laravel

Here is what I've done.

// Factories\SMSFactory.php

namespace App\Factories;

use App\IError;


class SMSFactory
{
    public static function default()
    {
        $defaultProvider = config('sms.default_provider');
        return self::provider($defaultProvider);
    }

    public static function provider($providerId)
    {
        $providerClass = config('sms.' . $providerId);

        if (class_exists($providerClass))
        {
            return (new $providerClass);
        }

        return new class implements IError {

        };
    }

}

// sms.php (config)

return [
    /**
     * Set the default SMS provider for the application
     */
    'default_provider' => 'smsglobal',

    /**
     * Map the SMS provider to a class implementation
     */
    'smsglobal' => 'App\SMSGlobal\SMSGlobal',
];

// Providers\SMSServiceProvider.php

namespace App\Providers;

use Illuminate\Support\ServiceProvider;


class SMSServiceProvider extends ServiceProvider
{
    /**
     * Bootstrap the application services.
     *
     * @return void
     */
    public function boot()
    {
        //
    }

    /**
     * Register the application services.
     *
     *
     * @return void
     */
    public function register()
    {
        $this->app->bind('sms', 'App\Factories\SMSFactory');
    }
}

// Facades\SMS.php

namespace App\Facades;

use Illuminate\Support\Facades\Facade;

class SMS extends Facade
{
    protected static function getFacadeAccessor()
    {
        return 'sms';
    }
}


// app.php

App\Providers\SMSServiceProvider::class,

# and in aliases

'SMS' => App\Facades\SMS::class,


// Controllers/TestController.php


namespace App\Http\Controllers\TestController;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;

use App\Facades\SMS;


class TestController extends Controller
{
    public function sendSMS($destination, $message)
    {
        $data = $request->all();

        return SMS::default()->send([
            'destination' => $destination,
            'message' => $message,
        ]);
    }
}

What is really bothering me is having to always use default()...

I understand that the facade acts as a static class, but is it possible to set it up in such a way that I could make calls like this?

SMS::send($args);

// When I want to use another gateway
SMS::provider('nexmo')->send($args);

Answer 1

You can use the __call method in your SMS Factory class, and it must be changed accordingly:

class SMSFactory
{
    public function default()
    {
        $defaultProvider = config('sms.default_provider');

        return $this->provider($defaultProvider);
    }

    public function provider($providerId)
    {
        $providerClass = config('sms.' . $providerId);

        if (class_exists($providerClass))
        {
            return (new $providerClass);
        }

        return new class implements IError {

        };
    }

    public function __call($name, $arguments)
    {
        if (!method_exists($this, $name)) {
            $object = [$this->default(), $name];
        } else {
            $object = [$this, $name];
        }

        return call_user_func_array($object, $arguments);
    }
}

The SMSFactory class should not have static methods as the static methods can be accessed through facade.