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<?php
/**
* @copyright Copyright (c) 2016 Lukas Reschke <lukas@statuscode.ch>
*
* @author Lukas Reschke <lukas@statuscode.ch>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
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);
$firstVersion = isset($versionElements[0]) ? $versionElements[0] : '';
$firstVersionNumber = substr($firstVersion, 2);
$secondVersion = isset($versionElements[1]) ? $versionElements[1] : '';
$secondVersionNumber = substr($secondVersion, 2);
switch(count($versionElements)) {
case 1:
if(!$this->isValidVersionString($firstVersionNumber)) {
break;
}
if(substr($firstVersion, 0, 1) === '>') {
return new Version($firstVersionNumber, '');
} else {
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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