IntervalChecker.php
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IntervalChecker.php
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	<?php

	/*
	* This file is part of Psy Shell.
	*
	* (c) 2012-2023 Justin Hileman
	*
	* For the full copyright and license information, please view the LICENSE
	* file that was distributed with this source code.
	*/

	namespace Psy\VersionUpdater;

	class IntervalChecker extends GitHubChecker
	{
	private string $cacheFile;
	private string $interval;

	public function __construct($cacheFile, $interval)
	{
	$this->cacheFile = $cacheFile;
	$this->interval = $interval;
	}

	public function fetchLatestRelease()
	{
	// Read the cached file
	$cached = \json_decode(@\file_get_contents($this->cacheFile, false));
	if ($cached && isset($cached->last_check) && isset($cached->release)) {
	$now = new \DateTime();
	$lastCheck = new \DateTime($cached->last_check);
	if ($lastCheck >= $now->sub($this->getDateInterval())) {
	return $cached->release;
	}
	}

	// Fall back to fetching from GitHub
	$release = parent::fetchLatestRelease();
	if ($release && isset($release->tag_name)) {
	$this->updateCache($release);
	}

	return $release;
	}

	/**
	* @throws \RuntimeException if interval passed to constructor is not supported
	*/
	private function getDateInterval(): \DateInterval
	{
	switch ($this->interval) {
	case Checker::DAILY:
	return new \DateInterval('P1D');
	case Checker::WEEKLY:
	return new \DateInterval('P1W');
	case Checker::MONTHLY:
	return new \DateInterval('P1M');
	}

	throw new \RuntimeException('Invalid interval configured');
	}

	private function updateCache($release)
	{
	$data = [
	'last_check' => \date(\DATE_ATOM),
	'release' => $release,
	];

	\file_put_contents($this->cacheFile, \json_encode($data));
	}
	}