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<?php |
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/** |
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* (c) 2018 Douglas Reith. |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace Reith\ToyRobot\Infrastructure\Persistence; |
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use Psr\Log\LoggerInterface; |
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use Reith\ToyRobot\Domain\Robot\Robot; |
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class FileRobotStore implements RobotStoreInterface |
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{ |
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private const FILE_VERSION = '001'; |
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private static $store; |
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private $file; |
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private $logger; |
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/** |
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* __construct. |
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* |
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* @param \SplFileObject $file |
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* @param LoggerInterface|null $logger |
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*/ |
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private function __construct(\SplFileObject $file, ?LoggerInterface $logger = null) |
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{ |
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$this->file = $file; |
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$this->logger = $logger; |
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} |
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public function __destruct() |
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{ |
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$this->file = null; |
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} |
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/** |
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* @param string $basePath |
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* @param LoggerInterface|null $logger |
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* |
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* @return RobotStoreInterface |
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*/ |
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public static function getStore(string $basePath, ?LoggerInterface $logger = null): RobotStoreInterface |
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{ |
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// Ensure the same store is used everywhere |
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if (!self::$store) { |
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self::$store = self::createStore($basePath, $logger); |
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} |
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return self::$store; |
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} |
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/** |
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* @param string $basePath |
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* @param LoggerInterface|null $logger |
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* |
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* @return RobotStoreInterface |
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*/ |
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private static function createStore(string $basePath, ?LoggerInterface $logger): RobotStoreInterface |
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{ |
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$baseDir = $basePath . DIRECTORY_SEPARATOR . 'robotstore'; |
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if (false === file_exists($baseDir)) { |
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mkdir($baseDir, 0644, true); |
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} |
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$fileName = $baseDir . DIRECTORY_SEPARATOR . self::FILE_VERSION . '-robot.txt'; |
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if (false === file_exists($fileName)) { |
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touch($fileName); |
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} |
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// w+ - for reading and writing |
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return new static(new \SplFileObject($fileName, 'w+'), $logger); |
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} |
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/** |
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* @return Robot|null |
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*/ |
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public function getRobot(): ?Robot |
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{ |
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if (!$this->file->getSize()) { |
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return null; |
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} |
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$this->file->rewind(); |
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$contents = $this->file->fread($this->file->getSize()); |
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return unserialize($contents); |
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} |
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/** |
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* @param Robot $robot |
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*/ |
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public function saveRobot(Robot $robot): void |
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{ |
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// Empty the file |
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$this->file->ftruncate(0); |
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$this->file->rewind(); |
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// Save the robot |
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$bytes = $this->file->fwrite(serialize($robot)); |
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$this->file->fflush(); |
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$this->log(sprintf('Wrote [%d] robot bytes to [%s]', $bytes, $this->file->getRealPath())); |
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} |
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/** |
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* @param string $msg |
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*/ |
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private function log(string $msg): void |
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{ |
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if (!$this->logger) { |
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return; |
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} |
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$this->logger->info($msg); |
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} |
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} |
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reithbot /
toyrobot-php
