设计模式——中介者模式

说明

示例

下面看下中介者模式的代码实现

interface Mediator{
    public function createMediator(): void;
    public function workAll(): void;
}

class MyMediator implements Mediator{
    private User $user1,$user2;

    public function getUser1(): User{
        return $this->user1;
    }

    public function getUser2(): User{
        return $this->user2;
    }

    public function createMediator(): void{
        $this->user1 = new User1($this);
        $this->user2 = new User2($this);
    }

    public function workAll(): void{
        $this->user1->work();
        $this->user2->work();
    }
}

abstract class User{
    private Mediator $mediator;

    public function __construct(Mediator $mediator){
        $this->mediator = $mediator;
    }

    public function getMediator(): Mediator{
        return $this->mediator;
    }

    public abstract function work():void;
}

class User1 extends User{
    public function __construct(Mediator $mediator){
        parent::__construct($mediator);
    }
    public function work(): void{
        echo "user1 exe!" . PHP_EOL;
    }
}

class User2 extends User{
    public function __construct(Mediator $mediator){
        parent::__construct($mediator);
    }

    public function work(): void{
        echo "user2 exe!" . PHP_EOL;
    }
}


// 调用
$mediator = new MyMediator();
$mediator->createMediator();
$mediator->workAll();
/**
 * output:
 * user1 exe!
 * user2 exe!
 * 
 */

总结