门面模式 php

//门面模式 (Facade)又称外观模式，用于为子系统中的一组接口提供一个一致的界面。门面模式定义了一个高层接口，这个接口使得子系统更加容易使用：引入门面角色之后，用户只需要直接与门面角色交互，用户与子系统之间的复杂关系由门面角色来实现，从而降低了系统的耦

class Camera{

public function turnOn(){

var_dump("开");

}

public function turnOff(){

var_dump("关");

}

public function rotate($degrees){}

}

class Light{

public function turnOn(){

var_dump("开");

}

public function turnOff(){

var_dump("关");

}

public function changeBulb(){}

}

class Sensor{

public function activate(){}

// diːˈæktɪveɪt 停用

public function deactivate(){}

public function trigger(){}

}

class Alarm{

public function activate(){}

public function deactivate(){}

public function ring(){}

public function stopRing(){}

}

class SecurityFacade{

private $camera1, $camera2;

private $light1, $light2, $light3;

private $sensor;

private $alarm;

public function __construct()

{

$this->camera1 = new Camera();

$this->camera2 = new Camera();

$this->light1  = new Light();

$this->light2  = new Light();

$this->light3  = new Light();

$this->sensor  = new Sensor();

$this->alarm   = new Alarm();

}

public function activate() {

$this->camera1->turnOn();

$this->camera2->turnOn();

$this->light1->turnOn();

$this->light2->turnOn();

$this->light3->turnOn();

$this->alarm->activate();

$this->alarm->activate();

}

public  function deactivate() {

$this->camera1->turnOff();

$this->camera2->turnOff();

$this->light1->turnOff();

$this->light2->turnOff();

$this->light3->turnOff();

$this->alarm->deactivate();

$this->alarm->deactivate();

}

}

$securityObj = new SecurityFacade();

$securityObj->activate();

$securityObj->deactivate();

//string(3) "开"

//string(3) "开"

//string(3) "开"

//string(3) "开"

//string(3) "开"

//string(3) "关"

//string(3) "关"

//string(3) "关"

//string(3) "关"

//string(3) "关"