Chris@13: <?php
Chris@13: 
Chris@13: /*
Chris@13:  * This file is part of Psy Shell.
Chris@13:  *
Chris@13:  * (c) 2012-2018 Justin Hileman
Chris@13:  *
Chris@13:  * For the full copyright and license information, please view the LICENSE
Chris@13:  * file that was distributed with this source code.
Chris@13:  */
Chris@13: 
Chris@13: namespace Psy\VersionUpdater;
Chris@13: 
Chris@13: class IntervalChecker extends GitHubChecker
Chris@13: {
Chris@13:     private $cacheFile;
Chris@13:     private $interval;
Chris@13: 
Chris@13:     public function __construct($cacheFile, $interval)
Chris@13:     {
Chris@13:         $this->cacheFile = $cacheFile;
Chris@13:         $this->interval  = $interval;
Chris@13:     }
Chris@13: 
Chris@13:     public function fetchLatestRelease()
Chris@13:     {
Chris@13:         // Read the cached file
Chris@17:         $cached = \json_decode(@\file_get_contents($this->cacheFile, false));
Chris@13:         if ($cached && isset($cached->last_check) && isset($cached->release)) {
Chris@13:             $now = new \DateTime();
Chris@13:             $lastCheck = new \DateTime($cached->last_check);
Chris@13:             if ($lastCheck >= $now->sub($this->getDateInterval())) {
Chris@13:                 return $cached->release;
Chris@13:             }
Chris@13:         }
Chris@13: 
Chris@13:         // Fall back to fetching from GitHub
Chris@13:         $release = parent::fetchLatestRelease();
Chris@13:         if ($release && isset($release->tag_name)) {
Chris@13:             $this->updateCache($release);
Chris@13:         }
Chris@13: 
Chris@13:         return $release;
Chris@13:     }
Chris@13: 
Chris@13:     private function getDateInterval()
Chris@13:     {
Chris@13:         switch ($this->interval) {
Chris@13:             case Checker::DAILY:
Chris@13:                 return new \DateInterval('P1D');
Chris@13:             case Checker::WEEKLY:
Chris@13:                 return new \DateInterval('P1W');
Chris@13:             case Checker::MONTHLY:
Chris@13:                 return new \DateInterval('P1M');
Chris@13:         }
Chris@13:     }
Chris@13: 
Chris@13:     private function updateCache($release)
Chris@13:     {
Chris@13:         $data = [
Chris@17:             'last_check' => \date(DATE_ATOM),
Chris@13:             'release'    => $release,
Chris@13:         ];
Chris@13: 
Chris@17:         \file_put_contents($this->cacheFile, \json_encode($data));
Chris@13:     }
Chris@13: }