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<?php |
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namespace Helix\Asana\Api; |
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use DateInterval; |
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use DateTime; |
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use Psr\SimpleCache\CacheInterface; |
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/** |
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* A bare bones PSR-16 "compliant" file-based cache for {@see SimpleCache}. |
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* |
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* Use this if you don't have a better cache. |
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* |
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* This is not safe for concurrency. |
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*/ |
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final class FileCache implements CacheInterface { |
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/** |
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* @var string |
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*/ |
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private $dir; |
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/** |
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* Compression. |
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* |
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* @var bool |
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*/ |
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private $gz; |
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/** |
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* @var LoggerInterface |
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*/ |
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private $logger; |
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/** |
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* @param string $dir |
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* @param bool $gz |
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*/ |
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public function __construct (string $dir, $gz = false) { |
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$this->dir = $dir; |
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$this->gz = $gz; |
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} |
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private function _path ($key): string { |
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$path = "{$this->dir}/{$key}~"; |
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clearstatcache(true, $path); |
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return $path; |
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} |
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private function _ref ($key): string { |
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return "{$this->dir}/{$key}.ref"; |
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} |
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public function clear () { |
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// unused. just delete the dir. |
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} |
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public function delete ($key) { |
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$path = $this->_path($key); |
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if (is_link($ref = $this->_ref($key))) { |
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$this->log('CACHE DELINK', $key); |
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unlink($ref); |
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unlink($path); |
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} |
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elseif (is_file($path)) { |
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$this->log('CACHE DELETE', $key); |
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unlink($path); |
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} |
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} |
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public function deleteMultiple ($keys) { |
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// unused |
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} |
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public function get ($key, $default = null) { |
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$path = $this->_path($key); |
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if (is_file($path)) { |
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if (filemtime($path) > time()) { |
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$this->log('CACHE HIT', $key); |
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$data = file_get_contents($path); |
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if ($this->gz) { |
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$data = gzdecode($data); |
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} |
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return unserialize($data); |
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} |
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$this->log('CACHE EXPIRE', $key); |
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unlink($path); |
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} |
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else { |
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$this->log('CACHE MISS', $key); |
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} |
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return $default; |
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} |
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/** |
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* @return LoggerInterface |
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*/ |
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public function getLogger () { |
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return $this->logger; |
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} |
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public function getMultiple ($keys, $default = null) { |
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// unused |
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} |
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public function has ($key) { |
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// unused |
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} |
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private function log (string $msg, string $key): void { |
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if ($this->logger) { |
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$this->logger->log($msg, $key); |
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} |
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} |
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/** |
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* @param string $key |
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* @param string|object $value |
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* @param DateInterval $ttl |
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* @return void |
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*/ |
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public function set ($key, $value, $ttl = null): void { |
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assert($ttl instanceof DateInterval); |
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$path = $this->_path($key); |
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$data = serialize($value); |
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if ($this->gz) { |
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$data = gzencode($data); |
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} |
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if (!is_dir(dirname($path))) { |
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mkdir(dirname($path), 0770, true); |
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} |
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if (is_object($value)) { |
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$this->log('CACHE SET', $key); |
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file_put_contents($path, $data); |
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} |
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elseif (!file_exists($path)) { |
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$this->log('CACHE LINK', "{$key} => asana/{$value}"); |
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file_put_contents($path, $data); |
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symlink($this->_path("asana/{$value}"), $this->_ref($key)); |
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} |
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chmod($path, 0660); |
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touch($path, (new DateTime())->add($ttl)->getTimeStamp()); |
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} |
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/** |
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* @param null|LoggerInterface $logger |
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* @return $this |
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*/ |
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public function setLogger (?LoggerInterface $logger) { |
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$this->logger = $logger; |
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return $this; |
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} |
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public function setMultiple ($values, $ttl = null) { |
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// unused |
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} |
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} |
hfw /
asana
