1 files changed, 154 insertions, 0 deletions
diff --git a/vendor/evenement/evenement/src/EventEmitterTrait.php b/vendor/evenement/evenement/src/EventEmitterTrait.php
new file mode 100644
index 0000000..1503429
--- /dev/null
+++ b/vendor/evenement/evenement/src/EventEmitterTrait.php
@@ -0,0 +1,154 @@
+<?php declare(strict_types=1);
+
+/*
+ * This file is part of Evenement.
+ *
+ * (c) Igor Wiedler <igor@wiedler.ch>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Evenement;
+
+use InvalidArgumentException;
+
+use function count;
+use function array_keys;
+use function array_merge;
+use function array_search;
+use function array_unique;
+use function array_values;
+
+trait EventEmitterTrait
+{
+    protected $listeners = [];
+    protected $onceListeners = [];
+
+    public function on($event, callable $listener)
+    {
+        if ($event === null) {
+            throw new InvalidArgumentException('event name must not be null');
+        }
+
+        if (!isset($this->listeners[$event])) {
+            $this->listeners[$event] = [];
+        }
+
+        $this->listeners[$event][] = $listener;
+
+        return $this;
+    }
+
+    public function once($event, callable $listener)
+    {
+        if ($event === null) {
+            throw new InvalidArgumentException('event name must not be null');
+        }
+
+        if (!isset($this->onceListeners[$event])) {
+            $this->onceListeners[$event] = [];
+        }
+
+        $this->onceListeners[$event][] = $listener;
+
+        return $this;
+    }
+
+    public function removeListener($event, callable $listener)
+    {
+        if ($event === null) {
+            throw new InvalidArgumentException('event name must not be null');
+        }
+
+        if (isset($this->listeners[$event])) {
+            $index = array_search($listener, $this->listeners[$event], true);
+            if (false !== $index) {
+                unset($this->listeners[$event][$index]);
+                if (count($this->listeners[$event]) === 0) {
+                    unset($this->listeners[$event]);
+                }
+            }
+        }
+
+        if (isset($this->onceListeners[$event])) {
+            $index = array_search($listener, $this->onceListeners[$event], true);
+            if (false !== $index) {
+                unset($this->onceListeners[$event][$index]);
+                if (count($this->onceListeners[$event]) === 0) {
+                    unset($this->onceListeners[$event]);
+                }
+            }
+        }
+    }
+
+    public function removeAllListeners($event = null)
+    {
+        if ($event !== null) {
+            unset($this->listeners[$event]);
+        } else {
+            $this->listeners = [];
+        }
+
+        if ($event !== null) {
+            unset($this->onceListeners[$event]);
+        } else {
+            $this->onceListeners = [];
+        }
+    }
+
+    public function listeners($event = null): array
+    {
+        if ($event === null) {
+            $events = [];
+            $eventNames = array_unique(
+                array_merge(
+                    array_keys($this->listeners),
+                    array_keys($this->onceListeners)
+                )
+            );
+            foreach ($eventNames as $eventName) {
+                $events[$eventName] = array_merge(
+                    isset($this->listeners[$eventName]) ? $this->listeners[$eventName] : [],
+                    isset($this->onceListeners[$eventName]) ? $this->onceListeners[$eventName] : []
+                );
+            }
+            return $events;
+        }
+
+        return array_merge(
+            isset($this->listeners[$event]) ? $this->listeners[$event] : [],
+            isset($this->onceListeners[$event]) ? $this->onceListeners[$event] : []
+        );
+    }
+
+    public function emit($event, array $arguments = [])
+    {
+        if ($event === null) {
+            throw new InvalidArgumentException('event name must not be null');
+        }
+
+        $listeners = [];
+        if (isset($this->listeners[$event])) {
+            $listeners = array_values($this->listeners[$event]);
+        }
+
+        $onceListeners = [];
+        if (isset($this->onceListeners[$event])) {
+            $onceListeners = array_values($this->onceListeners[$event]);
+        }
+
+        if(empty($listeners) === false) {
+            foreach ($listeners as $listener) {
+                $listener(...$arguments);
+            }
+        }
+
+        if(empty($onceListeners) === false) {
+            unset($this->onceListeners[$event]);
+            foreach ($onceListeners as $listener) {
+                $listener(...$arguments);
+            }
+        }
+    }
+}