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<?php
/*
* This file is part of Psy Shell.
*
* (c) 2012-2017 Justin Hileman
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Psy\VersionUpdater;
use Psy\Shell;
class GitHubChecker implements Checker
{
const URL = 'https://api.github.com/repos/bobthecow/psysh/releases/latest';
private $latest;
/**
* @return bool
*/
public function isLatest()
{
return version_compare(Shell::VERSION, $this->getLatest(), '>=');
}
/**
* @return string
*/
public function getLatest()
{
if (!isset($this->latest)) {
$this->setLatest($this->getVersionFromTag());
}
return $this->latest;
}
/**
* @param string $version
*/
public function setLatest($version)
{
$this->latest = $version;
}
/**
* @return string|null
*/
private function getVersionFromTag()
{
$contents = $this->fetchLatestRelease();
if (!$contents || !isset($contents->tag_name)) {
throw new \InvalidArgumentException('Unable to check for updates');
}
$this->setLatest($contents->tag_name);
return $this->getLatest();
}
/**
* Set to public to make testing easier.
*
* @return mixed
*/
public function fetchLatestRelease()
{
$context = stream_context_create(array('http' => array('user_agent' => 'PsySH/' . Shell::VERSION)));
return json_decode(@file_get_contents(self::URL, false, $context));
}
}