Subiendo proyecto completo sin restricciones de git ignore

vendor/doctrine/event-manager/src/EventManager.php

@@ -0,0 +1,129 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Common;
+
+use function spl_object_hash;
+
+/**
+ * The EventManager is the central point of Doctrine's event listener system.
+ * Listeners are registered on the manager and events are dispatched through the
+ * manager.
+ */
+class EventManager
+{
+    /**
+     * Map of registered listeners.
+     * <event> => <listeners>
+     *
+     * @var array<string, object[]>
+     */
+    private array $listeners = [];
+
+    /**
+     * Dispatches an event to all registered listeners.
+     *
+     * @param string         $eventName The name of the event to dispatch. The name of the event is
+     *                                  the name of the method that is invoked on listeners.
+     * @param EventArgs|null $eventArgs The event arguments to pass to the event handlers/listeners.
+     *                                  If not supplied, the single empty EventArgs instance is used.
+     */
+    public function dispatchEvent(string $eventName, EventArgs|null $eventArgs = null): void
+    {
+        if (! isset($this->listeners[$eventName])) {
+            return;
+        }
+
+        $eventArgs ??= EventArgs::getEmptyInstance();
+
+        foreach ($this->listeners[$eventName] as $listener) {
+            $listener->$eventName($eventArgs);
+        }
+    }
+
+    /**
+     * Gets the listeners of a specific event.
+     *
+     * @param string $event The name of the event.
+     *
+     * @return object[]
+     */
+    public function getListeners(string $event): array
+    {
+        return $this->listeners[$event] ?? [];
+    }
+
+    /**
+     * Gets all listeners keyed by event name.
+     *
+     * @return array<string, object[]> The event listeners for the specified event, or all event listeners.
+     */
+    public function getAllListeners(): array
+    {
+        return $this->listeners;
+    }
+
+    /**
+     * Checks whether an event has any registered listeners.
+     */
+    public function hasListeners(string $event): bool
+    {
+        return ! empty($this->listeners[$event]);
+    }
+
+    /**
+     * Adds an event listener that listens on the specified events.
+     *
+     * @param string|string[] $events   The event(s) to listen on.
+     * @param object          $listener The listener object.
+     */
+    public function addEventListener(string|array $events, object $listener): void
+    {
+        // Picks the hash code related to that listener
+        $hash = spl_object_hash($listener);
+
+        foreach ((array) $events as $event) {
+            // Overrides listener if a previous one was associated already
+            // Prevents duplicate listeners on same event (same instance only)
+            $this->listeners[$event][$hash] = $listener;
+        }
+    }
+
+    /**
+     * Removes an event listener from the specified events.
+     *
+     * @param string|string[] $events
+     */
+    public function removeEventListener(string|array $events, object $listener): void
+    {
+        // Picks the hash code related to that listener
+        $hash = spl_object_hash($listener);
+
+        foreach ((array) $events as $event) {
+            unset($this->listeners[$event][$hash]);
+        }
+    }
+
+    /**
+     * Adds an EventSubscriber.
+     *
+     * The subscriber is asked for all the events it is interested in and added
+     * as a listener for these events.
+     */
+    public function addEventSubscriber(EventSubscriber $subscriber): void
+    {
+        $this->addEventListener($subscriber->getSubscribedEvents(), $subscriber);
+    }
+
+    /**
+     * Removes an EventSubscriber.
+     *
+     * The subscriber is asked for all the events it is interested in and removed
+     * as a listener for these events.
+     */
+    public function removeEventSubscriber(EventSubscriber $subscriber): void
+    {
+        $this->removeEventListener($subscriber->getSubscribedEvents(), $subscriber);
+    }
+}