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<?php
/**
* SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
namespace OC\App\AppStore\Version;
/**
* Class VersionParser parses the versions as sent by the Nextcloud app store
*
* @package OC\App\AppStore
*/
class VersionParser {
/**
* @param string $versionString
* @return bool
*/
private function isValidVersionString($versionString) {
return (bool)preg_match('/^[0-9.]+$/', $versionString);
}
/**
* Returns the version for a version string
*
* @param string $versionSpec
* @return Version
* @throws \Exception If the version cannot be parsed
*/
public function getVersion($versionSpec) {
// * indicates that the version is compatible with all versions
if ($versionSpec === '*') {
return new Version('', '');
}
// Count the amount of =, if it is one then it's either maximum or minimum
// version. If it is two then it is maximum and minimum.
$versionElements = explode(' ', $versionSpec);
$firstVersion = $versionElements[0] ?? '';
$firstVersionNumber = substr($firstVersion, 2);
$secondVersion = $versionElements[1] ?? '';
$secondVersionNumber = substr($secondVersion, 2);
switch (count($versionElements)) {
case 1:
if (!$this->isValidVersionString($firstVersionNumber)) {
break;
}
if (str_starts_with($firstVersion, '>')) {
return new Version($firstVersionNumber, '');
}
return new Version('', $firstVersionNumber);
case 2:
if (!$this->isValidVersionString($firstVersionNumber) || !$this->isValidVersionString($secondVersionNumber)) {
break;
}
return new Version($firstVersionNumber, $secondVersionNumber);
}
throw new \Exception(
sprintf(
'Version cannot be parsed: %s',
$versionSpec
)
);
}
}
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