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<?php |
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namespace Helix\Asana\Api; |
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use Helix\Asana\Base\AbstractEntity\ImmutableInterface; |
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use Psr\Log\LoggerInterface; |
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use Psr\Log\NullLogger; |
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use Psr\SimpleCache\CacheInterface; |
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/** |
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* An optional bare bones PSR-16 "compliant" file-based cache for {@link SimpleCachePool}. |
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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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* @var LoggerInterface |
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*/ |
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private $log; |
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/** |
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* @param string $dir |
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*/ |
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public function __construct (string $dir) { |
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$this->dir = $dir; |
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$this->log = new NullLogger(); |
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} |
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private function _log (string $msg): void { |
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$this->log->log(LOG_DEBUG, $msg); |
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} |
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private function _path ($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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/** |
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* @param string $key |
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* @param mixed $default Unused. |
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* @return null|string|object |
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*/ |
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public function get ($key, $default = null) { |
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$path = $this->_path($key); |
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if (!is_file($path)) { |
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$this->_log("CACHE MISS {$key}"); |
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return null; |
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} |
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if (filemtime($path) <= time()) { |
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$this->_log("CACHE EXPIRE {$key}"); |
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unlink($path); |
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return null; |
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} |
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$data = unserialize(file_get_contents($path)); |
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$this->_log(is_object($data) |
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? "CACHE HIT {$key} => " . get_class($data) |
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: "CACHE BOUNCE {$key} => {$data}" |
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); |
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return $data; |
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} |
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public function getMultiple ($keys, $default = null) { |
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// unused |
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} |
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public function has ($key): bool { |
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return is_file($this->_path($key)); |
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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 int $ttl |
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* @return void |
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*/ |
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public function set ($key, $value, $ttl = null): void { |
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$path = $this->_path($key); |
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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([ |
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["CACHE SET {$key}", "CACHE BURN {$key}"][$value instanceof ImmutableInterface], |
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"CACHE UPDATE {$key}" |
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][is_file($path)]); |
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} |
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else { |
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$this->_log([ |
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"CACHE LINK {$key} => {$value}", |
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"CACHE RENEW LINK {$key} => {$value}" |
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][is_file($path)]); |
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if (!is_link($ref = $this->_ref($key))) { |
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symlink($this->_path("asana/{$value}"), $ref); |
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} |
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} |
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file_put_contents($path, serialize($value)); |
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chmod($path, 0660); |
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touch($path, time() + $ttl); |
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} |
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/** |
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* @param LoggerInterface $log |
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* @return $this |
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*/ |
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public function setLog (LoggerInterface $log) { |
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$this->log = $log; |
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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
