<?php

namespace Composer\Plugin;

use Composer\EventDispatcher\Event;
use Composer\Package\PackageInterface;

/**
 * The post file download event.
 *
 * @author Nils Adermann <naderman@naderman.de>
 */
class PostFileDownloadEvent extends Event
{
	/** @var string */
	private $fileName;

	/** @var string|null */
	private $checksum;

	/** @var string */
	private $url;

	/** @var mixed */
	private $context;

	/** @var string */
	private $type;


	/**
	 * Constructor.
	 *
	 * @param string      $name     The event name
	 * @param string|null $fileName The file name
	 * @param string|null $checksum The checksum
	 * @param string      $url      The processed url
	 * @param string      $type     The type (package or metadata).
	 * @param mixed       $context  Additional context for the download.
	 */
	public function __construct(
		string $name,
		?string $fileName,
		?string $checksum,
		string $url,
		string $type,
		$context = null,
	) {
		if ($context === null && $type instanceof PackageInterface) {
		    $context = $type;
		    $type = 'package';
		    trigger_error('PostFileDownloadEvent::__construct should receive a $type=package and the package object in $context since Composer 2.1.', E_USER_DEPRECATED);
		}

		parent::__construct($name);
		$this->fileName = $fileName;
		$this->checksum = $checksum;
		$this->url = $url;
		$this->context = $context;
		$this->type = $type;
	}


	/**
	 * Retrieves the target file name location.
	 *
	 * If this download is of type metadata, null is returned.
	 */
	public function getFileName(): ?string
	{
		return $this->fileName;
	}


	/**
	 * Gets the checksum.
	 */
	public function getChecksum(): ?string
	{
		return $this->checksum;
	}


	/**
	 * Gets the processed URL.
	 */
	public function getUrl(): string
	{
		return $this->url;
	}


	/**
	 * Returns the context of this download, if any.
	 *
	 * If this download is of type package, the package object is returned. If
	 * this download is of type metadata, an array{response: Response, repository: RepositoryInterface} is returned.
	 *
	 * @return mixed
	 */
	public function getContext()
	{
		return $this->context;
	}


	/**
	 * Get the package.
	 *
	 * If this download is of type metadata, null is returned.
	 *
	 * @return \Composer\Package\PackageInterface|null The package.
	 * @deprecated Use getContext instead
	 */
	public function getPackage(): ?PackageInterface
	{
		trigger_error('PostFileDownloadEvent::getPackage is deprecated since Composer 2.1, use getContext instead.', E_USER_DEPRECATED);
		$context = $this->getContext();

		return $context instanceof PackageInterface ? $context : null;
	}


	/**
	 * Returns the type of this download (package, metadata).
	 */
	public function getType(): string
	{
		return $this->type;
	}
}
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