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vendor/symfony/event-dispatcher/GenericEvent.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\EventDispatcher;
+
+use Symfony\Contracts\EventDispatcher\Event;
+
+/**
+ * Event encapsulation class.
+ *
+ * Encapsulates events thus decoupling the observer from the subject they encapsulate.
+ *
+ * @author Drak <drak@zikula.org>
+ *
+ * @implements \ArrayAccess<string, mixed>
+ * @implements \IteratorAggregate<string, mixed>
+ */
+class GenericEvent extends Event implements \ArrayAccess, \IteratorAggregate
+{
+    protected mixed $subject;
+    protected array $arguments;
+
+    /**
+     * Encapsulate an event with $subject and $arguments.
+     *
+     * @param mixed $subject   The subject of the event, usually an object or a callable
+     * @param array $arguments Arguments to store in the event
+     */
+    public function __construct(mixed $subject = null, array $arguments = [])
+    {
+        $this->subject = $subject;
+        $this->arguments = $arguments;
+    }
+
+    /**
+     * Getter for subject property.
+     */
+    public function getSubject(): mixed
+    {
+        return $this->subject;
+    }
+
+    /**
+     * Get argument by key.
+     *
+     * @throws \InvalidArgumentException if key is not found
+     */
+    public function getArgument(string $key): mixed
+    {
+        if ($this->hasArgument($key)) {
+            return $this->arguments[$key];
+        }
+
+        throw new \InvalidArgumentException(sprintf('Argument "%s" not found.', $key));
+    }
+
+    /**
+     * Add argument to event.
+     *
+     * @return $this
+     */
+    public function setArgument(string $key, mixed $value): static
+    {
+        $this->arguments[$key] = $value;
+
+        return $this;
+    }
+
+    /**
+     * Getter for all arguments.
+     */
+    public function getArguments(): array
+    {
+        return $this->arguments;
+    }
+
+    /**
+     * Set args property.
+     *
+     * @return $this
+     */
+    public function setArguments(array $args = []): static
+    {
+        $this->arguments = $args;
+
+        return $this;
+    }
+
+    /**
+     * Has argument.
+     */
+    public function hasArgument(string $key): bool
+    {
+        return \array_key_exists($key, $this->arguments);
+    }
+
+    /**
+     * ArrayAccess for argument getter.
+     *
+     * @param string $key Array key
+     *
+     * @throws \InvalidArgumentException if key does not exist in $this->args
+     */
+    public function offsetGet(mixed $key): mixed
+    {
+        return $this->getArgument($key);
+    }
+
+    /**
+     * ArrayAccess for argument setter.
+     *
+     * @param string $key Array key to set
+     */
+    public function offsetSet(mixed $key, mixed $value): void
+    {
+        $this->setArgument($key, $value);
+    }
+
+    /**
+     * ArrayAccess for unset argument.
+     *
+     * @param string $key Array key
+     */
+    public function offsetUnset(mixed $key): void
+    {
+        if ($this->hasArgument($key)) {
+            unset($this->arguments[$key]);
+        }
+    }
+
+    /**
+     * ArrayAccess has argument.
+     *
+     * @param string $key Array key
+     */
+    public function offsetExists(mixed $key): bool
+    {
+        return $this->hasArgument($key);
+    }
+
+    /**
+     * IteratorAggregate for iterating over the object like an array.
+     *
+     * @return \ArrayIterator<string, mixed>
+     */
+    public function getIterator(): \ArrayIterator
+    {
+        return new \ArrayIterator($this->arguments);
+    }
+}