add mediator classes

Author: git-growthdev

src/Behavioral/Mediator/AirTrafficControl.php

@@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Behavioral\Mediator;
+
+interface AirTrafficControl
+{
+ public function addAirplane(Airplane $airplane): void;
+
+ public function notifyAirplane(Airplane $airplane, string $message): void;
+}

src/Behavioral/Mediator/Airbus.php

@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Behavioral\Mediator;
+
+class Airbus extends Airplane
+{
+ public function sendMessage(string $message): void
+ {
+ parent::$airTrafficControl->notifyAirplane($this, $message);
+ }
+
+ public function receiveMessage(string $message): void
+ {
+ printf('Airbus received message: %s', $message);
+ }
+}

src/Behavioral/Mediator/Airplane.php

@@ -0,0 +1,19 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Behavioral\Mediator;
+
+abstract class Airplane
+{
+ protected AirTrafficControl $airTrafficControl;
+
+ public function __construct(AirTrafficControl $airTrafficControl)
+ {
+ $this->airTrafficControl = $airTrafficControl;
+ }
+
+ abstract public function sendMessage(string $message): void;
+
+ abstract public function receiveMessage(string $message): void;
+}

src/Behavioral/Mediator/Boing.php

@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Behavioral\Mediator;
+
+class Boing extends Airplane
+{
+ public function sendMessage(string $message): void
+ {
+ parent::$airTrafficControl->notifyAirplane($this, $message);
+ }
+
+ public function receiveMessage(string $message): void
+ {
+ printf('Boing received message: %s', $message);
+ }
+}

src/Behavioral/Mediator/Cessna.php

@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Behavioral\Mediator;
+
+class Cessna extends Airplane
+{
+ public function sendMessage(string $message): void
+ {
+ parent::$airTrafficControl->notifyAirplane($this, $message);
+ }
+
+ public function receiveMessage(string $message): void
+ {
+ printf('Cessna received message: %s', $message);
+ }
+}

src/Behavioral/Mediator/GRUAirTrafficControl.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Growthdev\DesignPatterns\Behavioral\Mediator;
+
+use SplObjectStorage;
+
+final class GRUAirTrafficControl implements AirTrafficControl
+{
+ private SplObjectStorage $airplane;
+
+ public function addAirplane(Airplane $airplane): void
+ {
+ $this->airplane->attach($airplane);
+ }
+
+ public function notifyAirplane(Airplane $airplaneReceiver, string $message): void
+ {
+ foreach ($this->airplane as $airplane) {
+ if ($airplaneReceiver !== $airplane) {
+ $airplaneReceiver->receiveMessage($message);
+ }
+ }
+ }
+}