Helix\Asana\Api\FileCache

Complexity

Total Complexity

15

Size/Duplication

Total Lines	81
Duplicated Lines	0 %

Importance

Changes	1
Bugs	0	Features	0

10 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	3	1
A	get()	0	14	3
A	deleteMultiple()	0	1	1
A	set()	0	18	4
A	has()	0	1	1
A	clear()	0	1	1
A	setMultiple()	0	1	1
A	delete()	0	3	1
A	_path()	0	4	1
A	getMultiple()	0	1	1

<?php

namespace Helix\Asana\Api;

use DateInterval;
use DateTime;
use Psr\SimpleCache\CacheInterface;

/**
 * A bare bones PSR-16 "compliant" file-based cache for {@see SimpleCache}.
 *
 * Use this if you don't have a better cache.
 *
 * This is not safe for concurrency.
 */
final class FileCache implements CacheInterface {

    /**
     * @var string
     */
    private $dir;

    /**
     * @var LoggerInterface
     */
    private $logger;

    public function __construct (string $dir, LoggerInterface $logger) {
        $this->dir = $dir;
        $this->logger = $logger;
    }

    private function _path ($key) {
        $file = "{$this->dir}/{$key}~";
        clearstatcache(true, $file);
        return $file;
    }

    public function clear () {
        // unused
    }

    public function delete ($key) {
        $this->logger->log('CACHE DELETE', $key);
        unlink($this->_path($key));
    }

    public function deleteMultiple ($keys) {
        // unused
    }

    public function get ($key, $default = null) {
        $file = $this->_path($key);
        if (file_exists($file)) {
            if (filemtime($file) > time()) {
                $this->logger->log('CACHE HIT', $key);
                return unserialize(file_get_contents($this->_path($key)));
            }
            $this->logger->log('CACHE EXPIRE', $key);
            unlink($file);
        }
        else {
            $this->logger->log('CACHE MISS', $key);
        }
        return $default;
    }

    public function getMultiple ($keys, $default = null) {
        // unused
    }

    public function has ($key) {
        // unused
    }

    public function set ($key, $value, $ttl = null) {
        assert($ttl instanceof DateInterval);
        $this->logger->log('CACHE SET', $key);
        $path = $this->_path($key);
        if (!is_dir(dirname($path))) {
            mkdir(dirname($path), 0770, true);
        }
        // if a gid ref is being stashed. make a symlink for quality of life.
        if (is_scalar($value)) {
            $link = substr($path, 0, -1) . '.ref';
            $real = $this->_path("asana/{$value}");
            if (!is_link($link)) {
                symlink($real, $link);
            }
        }
        file_put_contents($path, serialize($value));
        chmod($path, 0660);
        touch($path, (new DateTime())->add($ttl)->getTimeStamp());
    }

    public function setMultiple ($values, $ttl = null) {
        // unused
    }
}