Created
March 22, 2023 11:32
-
-
Save diloabininyeri/6fd558d42434969449f988a09afbdbb3 to your computer and use it in GitHub Desktop.
The an example observer design pattern in php
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <?php | |
| interface Subscriber | |
| { | |
| public function handle(Blog $blog): void; | |
| } | |
| trait ObserveAble | |
| { | |
| private array $events; | |
| public function share(Subscriber $subscriber): self | |
| { | |
| $this->events[] = $subscriber; | |
| return $this; | |
| } | |
| private function notify(Blog $blog): void | |
| { | |
| foreach ($this->events as $handler) { | |
| $handler->handle($blog); | |
| } | |
| } | |
| } | |
| class Blog | |
| { | |
| public function __construct(private readonly int $id, private readonly string $name) | |
| { | |
| } | |
| /** | |
| * @return string | |
| */ | |
| public function getName(): string | |
| { | |
| return $this->name; | |
| } | |
| /** | |
| * @return int | |
| */ | |
| public function getId(): int | |
| { | |
| return $this->id; | |
| } | |
| } | |
| class Facebook implements Subscriber | |
| { | |
| public function handle(Blog $blog): void | |
| { | |
| echo sprintf( | |
| 'id: %d, name: %s will share on facebook', | |
| $blog->getId(), | |
| $blog->getName() | |
| ); | |
| } | |
| } | |
| class Linkedin implements Subscriber | |
| { | |
| public function handle(Blog $blog): void | |
| { | |
| echo sprintf( | |
| 'id: %d, name: %s will share on linkedin', | |
| $blog->getId(), | |
| $blog->getName() | |
| ); | |
| } | |
| } | |
| class Article | |
| { | |
| use ObserveAble; | |
| public function publish(): bool | |
| { | |
| $this->notify(new Blog(12, 'test article')); | |
| return true; | |
| } | |
| } | |
| $article = new Article(); | |
| $article | |
| ->share(new Facebook()) | |
| ->share(new Linkedin()); | |
| $article->publish(); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment