Introduction

The phpABLE abstractions library provides the facade pattern implementation.

Requirements

• PHP >= 7.2.0
• able/statics

Install

There's a simple way to install able/facades into your project via Composer:

composer require able/facades

Usage

Let's design a simple class to explain how facades work:

class Recipient {
    private $name = "Unknown";
    
    public function __construct(string $name) {
        $this->name = $name;
    }
    
    public function changeName(string $name): void {
        $this->name = $name;
    }

    public function sayHello(): void {
        echo sprintf("Hello %s!", $this->name);
    }
}

So the point to use a facade is an ability to call recipients method statically, without creating any instances directly. In this case, the facade class takes a gateway role. The advantage we gain - more transparent and understandable code.

use \Able\Facades\AFacade;
use \Able\Facades\Structures\SInit;

class FacadeExample extends AFacade {
    
    /**
     * The recipient class.
     */
    protected static $Recipient = Recipient::class;

    /**
     * The initialize method can be used to provide 
     * some necessary arguments to the recipient class constructor if needed.
     */
    protected final static function initialize(): SInit {
        return new SInit(["John"]);
    }
}

FacadeExample::sayHello();

// Hello John!

It's also possible to provide the callback function as a second field of the structure. This function going to be executed directly after the creation and will obtain the created object as an argument.

use \Able\Facades\AFacade;
use \Able\Facades\Structures\SInit;

class FacadeExample extends AFacade {
    protected static $Recipient = Recipient::class;

    protected final static function initialize(): SInit {
        return new SInit(["John"], function(Recipient $Object){
            $Object->changeName("Barbara");
        });
    }
}

FacadeExample::sayHello();

// Hello Barbara!

By default, the only instance of the recipient class going to be created. This behavior is similar to a singleton pattern and could be changed via $keepSingle protected property.

use \Able\Facades\AFacade;

class FacadeExample extends AFacade {
    
    /**
     * If this property set to false, the new instance of the recipient object 
     * going to be created before any method call.
     */
    protected static $keepSingle  = false;
}

License

This package is released under the MIT license.