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<?php |
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namespace phpbu\App\Backup\Cleaner; |
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use phpbu\App\Backup\Cleaner; |
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use phpbu\App\Backup\Collector; |
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use phpbu\App\Backup\File; |
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use phpbu\App\Backup\Target; |
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/** |
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* Cleanup backup directory. |
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* |
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* Removes oldest backup till the given quantity isn't exceeded anymore. |
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* |
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* @package phpbu |
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* @subpackage Backup |
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* @author Sebastian Feldmann <[email protected]> |
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* @copyright Sebastian Feldmann <[email protected]> |
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* @license https://opensource.org/licenses/MIT The MIT License (MIT) |
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* @link http://phpbu.de/ |
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* @since Class available since Release 1.0.0 |
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*/ |
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class Quantity extends Abstraction implements Cleaner |
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{ |
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/** |
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* Amount of backups to keep |
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* |
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* @var integer |
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*/ |
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protected $amount; |
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/** |
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* Setup the Cleaner. |
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* |
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* @see \phpbu\App\Backup\Cleanup::setup() |
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* @param array $options |
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* @throws \phpbu\App\Backup\Cleaner\Exception |
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*/ |
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public function setup(array $options) |
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{ |
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if (!isset($options['amount'])) { |
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throw new Exception('option \'amount\' is missing'); |
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} |
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if (!is_numeric($options['amount'])) { |
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throw new Exception(sprintf('invalid value for \'amount\': %s', $options['amount'])); |
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} |
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if ($options['amount'] < 1) { |
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throw new Exception(sprintf('value for \'amount\' must be greater 0, %s given', $options['amount'])); |
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} |
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$this->amount = intval($options['amount']); |
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} |
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/** |
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* Return list of files to delete. |
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* |
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* @param \phpbu\App\Backup\Target $target |
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* @param \phpbu\App\Backup\Collector $collector |
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* @return \phpbu\App\Backup\File\Local[] |
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* @throws \phpbu\App\Exception |
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*/ |
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protected function getFilesToDelete(Target $target, Collector $collector) |
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{ |
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$files = $collector->getBackupFiles(); |
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$delete = []; |
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if ($this->isCapacityExceeded($files)) { |
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// oldest backups first |
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uasort($files, function (File $fileA, File $fileB) { |
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if ($fileA->getMTime() == $fileB->getMTime()) { |
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return 0; |
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} |
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return ($fileA->getMTime() < $fileB->getMTime()) ? -1 : 1; |
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}); |
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while ($this->isCapacityExceeded($files)) { |
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$file = array_shift($files); |
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$delete[] = $file; |
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} |
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} |
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return $delete; |
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} |
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/** |
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* Returns true when the capacity is exceeded. |
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* |
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* @param array |
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* @return boolean |
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*/ |
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private function isCapacityExceeded(array $files) |
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{ |
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$totalFiles = count($files); |
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$totalFilesPlusCurrentBackup = $totalFiles + 1; |
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return $totalFiles > 0 |
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&& $totalFilesPlusCurrentBackup > $this->amount; |
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} |
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} |
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sebastianfeldmann /
phpbu
