<?php

/*
 * This file is part of Composer.
 *
 * (c) Nils Adermann <naderman@naderman.de>
 *     Jordi Boggiano <j.boggiano@seld.be>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Composer\Downloader;

use Composer\Package\PackageInterface;

/**
 * Downloader interface.
 *
 * @author Konstantin Kudryashov <ever.zet@gmail.com>
 * @author Jordi Boggiano <j.boggiano@seld.be>
 */
interface DownloaderInterface
{
    /**
     * Returns installation source (either source or dist).
     *
     * @return string "source" or "dist"
     */
    public function getInstallationSource();

    /**
     * Downloads specific package into specific folder.
     *
     * @param PackageInterface $package package instance
     * @param string           $path    download path
     */
    public function download(PackageInterface $package, $path);

    /**
     * Updates specific package in specific folder from initial to target version.
     *
     * @param PackageInterface $initial initial package
     * @param PackageInterface $target  updated package
     * @param string           $path    download path
     */
    public function update(PackageInterface $initial, PackageInterface $target, $path);

    /**
     * Removes specific package from specific folder.
     *
     * @param PackageInterface $package package instance
     * @param string           $path    download path
     */
    public function remove(PackageInterface $package, $path);

    /**
     * Sets whether to output download progress information or not
     *
     * @param  bool                $outputProgress
     * @return DownloaderInterface
     */
    public function setOutputProgress($outputProgress);
}