PHP code example of koriit / eventdispatcher

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

koriit / eventdispatcher example snippets

// configure and build your container

$dispatcher = new EventDispatcher($container);

$listener = function (LoggerInterface $logger, Request $request) {
    $logger->info($request->getMethod().' '.$request->getPathInfo());
};

$dispatcher->addListener("init", $listener, 10);

$dispatcher->dispatch("init");

// MyClass.php
class MyClass
{
    public function logRequest(LoggerInterface $logger, Request $request)
    {
        $logger->info($request->getMethod().' '.$request->getPathInfo());
    }
}

// configure and build your container

$dispatcher = $container->get(EventDispatcherInterface::class);

$dispatcher->addListener(ApplicationLifecycle::INITIALIZING, [MyClass::class, 'logRequest'], 10);

$dispatcher->dispatch(ApplicationLifecycle::INITIALIZING);

// MyInterface.php
interface MyInterface
{
    public function logRequest(LoggerInterface $logger, Request $request);
}

// MyClass.php
class MyClass implements MyInterface
{
    public function logRequest(LoggerInterface $logger, Request $request)
    {
        $logger->info($request->getMethod().' '.$request->getPathInfo());
    }
}

// configure and build your container

$dispatcher = $container->get(EventDispatcherInterface::class);

$dispatcher->addListener(InitializationEvent::class, [MyInterface::class, 'logRequest'], 10);

$dispatcher->dispatch(InitializationEvent::class, ["event" => new InitializationEvent()]);

interface EventDispatcherInterface
{
  // ..

  /**
   * Subscribes a listener to given event with specific priority.
   *
   * Listener must be invokable by PHP-DI.
   *
   * The higher the priority value the later the listener will be called.
   * Listeners with the same priority will be called in the order they have been subscribed.
   *
   * @param mixed  $eventName
   * @param mixed  $listener
   * @param int    $priority
   */
  public function addListener($eventName, $listener, $priority = 0);

  // ...
}

interface EventDispatcherInterface
{
  // ..

  /**
   * Subscribes listeners in bulk.
   * 
   * Listeners array is a simple structure of 3 levels:
   * - At first level it is associative array where keys are names of registered events
   * - At second level it is indexed array where keys are priority values
   * - At third level it is simple list containing listeners subscribed to given event with given priority
   * 
   * @param array $listeners
   * 
   * @return void
   */
  public function addListeners($listeners);

  // ...
}

// listners.php
// namespace and imports...

return [
    CLIApplicationLifecycle::INITIALIZING => [
        0 => [
            [ConfigServiceInterface::class, 'init'],
        ],
        1 => [
            [CommandsServiceInterface::class, 'load'],
        ],
    ],

    CLIApplicationLifecycle::FINALIZING => [
        100 => [
            function (LoggerInterface $logger, InputInterface $input, $exitCode) {
                $logger->info('Returning from command `'.$input.'` with exit code '.$exitCode);
            },
        ],
    ],
];

// ...

$dispatcher->addListeners(

interface EventDispatcherInterface
{
    // ...

    /**
     * Dispatches an event with given name.
     *
     * @param mixed $eventName
     * @param array $parameters
     *
     * @return EventContextInterface
     */
    public function dispatch($eventName, $parameters = []);

    // ...
}

// ..

$dispatcher->dispatch(ApplicationLifecycle::INITIALIZING);

// ..

$dispatcher->dispatch(InitializationEvent::class, ["event" => new InitializationEvent()]);

function listener($event) {
  // $event is InitializationEvent object
}