Subversion Repositories vnag

<?php /* <ViaThinkSoftSignature>

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</ViaThinkSoftSignature> */ ?>

<?php

/*

 * VNag - Nagios Framework for PHP

 * Developed by Daniel Marschall, ViaThinkSoft <www.viathinksoft.com>

 * Licensed under the terms of the Apache 2.0 license

 *

 * Revision 2023-06-12

 */

declare(ticks=1);

class MinecraftJavaVersionCheck extends VNag {

        protected $argSystemDir = null;

        public function __construct() {

                parent::__construct();

                $this->registerExpectedStandardArguments('Vvht');

                $this->getHelpManager()->setPluginName('check_minecraft_java_version');

                $this->getHelpManager()->setVersion('1.0');

                $this->getHelpManager()->setShortDescription('This plugin checks if a local Minecraft for Java server has the latest version installed.');

                $this->getHelpManager()->setCopyright('Copyright (C) 2011-$CURYEAR$ Daniel Marschall, ViaThinkSoft.');

                $this->getHelpManager()->setSyntax('$SCRIPTNAME$ [-d <directory>]');

                $this->getHelpManager()->setFootNotes('If you encounter bugs, please contact ViaThinkSoft at www.viathinksoft.com');

                // Individual (non-standard) arguments:

                $this->addExpectedArgument($this->argSystemDir = new VNagArgument('d', 'directory', VNagArgument::VALUE_REQUIRED, 'serverPath', 'The local directory where your Minecraft for Java server.jar is located.'));

        }

        protected function get_latest_minecraft_version() {

                $url = 'https://launchermeta.mojang.com/mc/game/version_manifest.json';

                $max_cache_time = 1 * 60 * 60;

                $cache_file = $this->get_cache_dir().'/'.sha1($url);

                if (file_exists($cache_file) && (time()-filemtime($cache_file) < $max_cache_time)) {

                        $cont = @file_get_contents($cache_file);

                        if (!$cont) throw new Exception("Failed to get contents from $cache_file");

                } else {

                        $cont = @file_get_contents('https://launchermeta.mojang.com/mc/game/version_manifest.json');

                        if (!$cont) throw new Exception("Cannot detect latest available Minecraft version (HTTPS request to $url failed)");

                        file_put_contents($cache_file, $cont);

                }

                $json = @json_decode($cont, true);

                if (!$json) throw new Exception("Cannot detect latest available Minecraft version (JSON invalid data)");

                $version = $json['latest']['release'] ?? null;

                if (!$version) throw new Exception("Cannot detect latest available Minecraft version (JSON does not contain version)");

                return $version;

        }

        protected function get_installed_minecraft_version($local_path) {

                if (strtolower(substr($local_path,-4)) == '.jar') {

                        // Single JAR file specified. Search it.

                        $files = glob($local_path);

                } else {

                        // Directory specified. Search the server.jar

                        /*$files = glob($local_path.'/server.jar');*/

                        $files = glob($local_path.'/*');

                        $files = preg_grep('/server\.jar$/i', $files); // case insensitive, for Windows

                        if ($files === false) $files = [];

                        $files = array_reverse(array_reverse($files, false), false); // make that array keys start with 0 again.

                }

                if (count($files) == 0) throw new Exception("No server.jar found at $local_path");

                if (count($files) > 1) throw new Exception("More than one server.jar found at $local_path");

                $server_jar = $files[0];

                $cmd = "unzip -p ".escapeshellarg($server_jar)." version.json";

                $out = array();

                $ec = -1;

                exec($cmd, $out, $ec);

                if ($ec != 0) throw new Exception("Cannot unzip version.json");

                $json = implode("\n",$out);

                return (string)json_decode($json,true)['name'];

        }

        protected function cbRun($optional_args=array()) {

                $system_dir = $this->argSystemDir->getValue(); // note: can contain wildcards

                $cur_ver = $this->get_installed_minecraft_version($system_dir);

                $new_ver = $this->get_latest_minecraft_version();

                if (version_compare($cur_ver,$new_ver) >= 0) {

                        $this->setStatus(VNag::STATUS_OK);

                        $this->setHeadline("Minecraft version $cur_ver is the latest available version for your Minecraft for Java server installation at $system_dir", true);

                } else {

                        $this->setStatus(VNag::STATUS_WARNING);

                        $this->setHeadline("Minecraft version $cur_ver is outdated. Newer version is $new_ver for installation at $system_dir", true);

                }

        }

}