<?php

namespace Composer\Script;

use Composer\Composer;
use Composer\EventDispatcher\Event as BaseEvent;
use Composer\IO\IOInterface;

/**
 * The script event class
 *
 * @author François Pluchino <francois.pluchino@opendisplay.com>
 * @author Nils Adermann <naderman@naderman.de>
 */
class Event extends BaseEvent
{
	/** @var Composer The composer instance */
	private $composer;

	/** @var IOInterface The IO instance */
	private $io;

	/** @var bool Dev mode flag */
	private $devMode;

	/** @var BaseEvent|null */
	private $originatingEvent;


	/**
	 * Constructor.
	 *
	 * @param string $name The event name
	 * @param Composer $composer The composer object
	 * @param IOInterface $io The IOInterface object
	 * @param bool $devMode Whether or not we are in dev mode
	 * @param array<string|int|float|bool|null> $args Arguments passed by the user
	 * @param mixed[] $flags Optional flags to pass data not as argument
	 */
	public function __construct(
		string $name,
		Composer $composer,
		IOInterface $io,
		bool $devMode = false,
		array $args = [],
		array $flags = [],
	) {
		parent::__construct($name, $args, $flags);
		$this->composer = $composer;
		$this->io = $io;
		$this->devMode = $devMode;
	}


	/**
	 * Returns the composer instance.
	 */
	public function getComposer(): Composer
	{
		return $this->composer;
	}


	/**
	 * Returns the IO instance.
	 */
	public function getIO(): IOInterface
	{
		return $this->io;
	}


	/**
	 * Return the dev mode flag
	 */
	public function isDevMode(): bool
	{
		return $this->devMode;
	}


	/**
	 * Set the originating event.
	 *
	 * @return ?BaseEvent
	 */
	public function getOriginatingEvent(): ?BaseEvent
	{
		return $this->originatingEvent;
	}


	/**
	 * Set the originating event.
	 *
	 * @return $this
	 */
	public function setOriginatingEvent(BaseEvent $event): self
	{
		$this->originatingEvent = $this->calculateOriginatingEvent($event);

		return $this;
	}


	/**
	 * Returns the upper-most event in chain.
	 */
	private function calculateOriginatingEvent(BaseEvent $event): BaseEvent
	{
		if ($event instanceof Event && $event->getOriginatingEvent()) {
		    return $this->calculateOriginatingEvent($event->getOriginatingEvent());
		}

		return $event;
	}
}
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