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system/vendor/league/event/src/EmitterTrait.php

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+<?php
+
+namespace League\Event;
+
+trait EmitterTrait
+{
+    use EmitterAwareTrait;
+
+    /**
+     * Add a listener for an event.
+     *
+     * The first parameter should be the event name, and the second should be
+     * the event listener. It may implement the League\Event\ListenerInterface
+     * or simply be "callable".
+     *
+     * @param string                     $event
+     * @param ListenerInterface|callable $listener
+     * @param int                        $priority
+     *
+     * @return $this
+     */
+    public function addListener($event, $listener, $priority = ListenerAcceptorInterface::P_NORMAL)
+    {
+        $this->getEmitter()->addListener($event, $listener, $priority);
+
+        return $this;
+    }
+
+    /**
+     * Add a one time listener for an event.
+     *
+     * The first parameter should be the event name, and the second should be
+     * the event listener. It may implement the League\Event\ListenerInterface
+     * or simply be "callable".
+     *
+     * @param string                     $event
+     * @param ListenerInterface|callable $listener
+     * @param int                        $priority
+     *
+     * @return $this
+     */
+    public function addOneTimeListener($event, $listener, $priority = ListenerAcceptorInterface::P_NORMAL)
+    {
+        $this->getEmitter()->addOneTimeListener($event, $listener, $priority);
+
+        return $this;
+    }
+
+    /**
+     * Remove a specific listener for an event.
+     *
+     * The first parameter should be the event name, and the second should be
+     * the event listener. It may implement the League\Event\ListenerInterface
+     * or simply be "callable".
+     *
+     * @param string                     $event
+     * @param ListenerInterface|callable $listener
+     *
+     * @return $this
+     */
+    public function removeListener($event, $listener)
+    {
+        $this->getEmitter()->removeListener($event, $listener);
+
+        return $this;
+    }
+
+    /**
+     * Remove all listeners for an event.
+     *
+     * The first parameter should be the event name. All event listeners will
+     * be removed.
+     *
+     * @param string $event
+     *
+     * @return $this
+     */
+    public function removeAllListeners($event)
+    {
+        $this->getEmitter()->removeAllListeners($event);
+
+        return $this;
+    }
+
+    /**
+     * Add listeners from a provider.
+     *
+     * @param ListenerProviderInterface $provider
+     *
+     * @return $this
+     */
+    public function useListenerProvider(ListenerProviderInterface $provider)
+    {
+        $this->getEmitter()->useListenerProvider($provider);
+
+        return $this;
+    }
+
+    /**
+     * Emit an event.
+     *
+     * @param string|EventInterface $event
+     *
+     * @return EventInterface
+     */
+    public function emit($event)
+    {
+        $emitter = $this->getEmitter();
+        $arguments = [$event] + func_get_args();
+
+        return call_user_func_array([$emitter, 'emit'], $arguments);
+    }
+}