Added ability to start a server

.gitignore

@@ -1,23 +1,2 @@
-# ---> Go
+# NPM dependencies
-# If you prefer the allow list template instead of the deny list, see community template:
+node_modules/
-# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
-#
-# Binaries for programs and plugins
-*.exe
-*.exe~
-*.dll
-*.so
-*.dylib
-
-# Test binary, built with `go test -c`
-*.test
-
-# Output of the go coverage tool, specifically when used with LiteIDE
-*.out
-
-# Dependency directories (remove the comment below to include it)
-# vendor/
-
-# Go workspace file
-go.work
-

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) <year> <owner> 
+Copyright (c) 2022 Bit Goblin
 
 Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
 

app/MinecraftServer.js

@@ -0,0 +1,64 @@
+const { exec } = require("child_process");
+const fs = require('fs');
+
+class Server {
+  constructor(dir) {
+    this.rootDir = dir;
+    this.name = dir.split('/').at(-1);
+    this.pidFilePath = this.rootDir + '/pid.txt';
+
+    // read version file
+    var versionFilePath = this.rootDir + '/current_version.txt';
+    if (fs.existsSync(versionFilePath)) {
+      this.version = fs.readFileSync(versionFilePath, {encoding:'utf8', flag:'r'});      
+    }
+  }
+
+  start() {
+    console.log(`Starting server ${this.name}...`);
+
+    // create shell command and execute it
+    let cmd = `${this.rootDir}/start.sh`;
+    exec(cmd, (err, stdout, stderr) => {
+      if (err) {
+        console.log(`Error while starting server: ${error.message}`);
+      }
+
+      console.log(`Server ${this.name} has been started.`);
+    });
+  }
+
+  stop() {
+    console.log(`Stopping server ${this.name}...`);
+  }
+
+  getStatus() {
+    if (fs.existsSync(this.pidFilePath)) {
+      let pid = fs.readFileSync(this.pidFilePath, {encoding: 'utf8', flag: 'r'});
+      try {
+        return process.kill(pid, 0);
+      } catch (err) {
+        // ESRCH error means the process doesn't exist, so should return false
+        if (err.code !== 'ESRCH') {
+          console.error(err);
+          return err.code === 'EPERM';
+        } else {
+          // delete pid.txt so we don't have to worry about checking it again
+          fs.unlinkSync(this.pidFilePath);
+        }
+      }
+    }
+
+    return false
+  }
+
+  getPid() {
+    if (fs.existsSync(this.pidFilePath)) {
+      return fs.readFileSync(this.pidFilePath, {encoding:'utf8', flag:'r'})
+    }
+
+    return -1;
+  }
+}
+
+exports.Server = Server;

config/default.json

@@ -0,0 +1,3 @@
+{
+  "server_directory": "/opt/minecraft"
+}

index.js

@@ -0,0 +1,30 @@
+const express = require('express');
+const app = express();
+const port = 3000;
+
+// set template engine to Pug
+app.set('view engine', 'pug');
+
+// Using express.urlencoded middleware
+app.use(express.urlencoded({
+  extended: true
+}));
+
+// import route handlers
+var homeRoutes = require('./routes/home');
+var serverRoutes = require('./routes/server');
+
+// define routes
+app.get('/', homeRoutes.getIndex);
+app.get('/server/create', serverRoutes.getCreate);
+app.post('/server/create', serverRoutes.postCreate);
+app.get('/server/:serverName/start', serverRoutes.getStart);
+app.get('/server/:serverName/stop', serverRoutes.getStop);
+
+// set Express to serve static files (ideally this is only used in development)
+app.use(express.static('./static/'));
+
+// start Express.js app
+app.listen(port, () => {
+  console.log(`MCST has started and is listening on port ${port}.`);
+});

package.json

@@ -0,0 +1,26 @@
+{
+  "name": "mcst",
+  "version": "0.1.0",
+  "description": "Minecraft Java edition server management tool",
+  "main": "index.js",
+  "scripts": {
+    "start": "node index.js",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "gitea@git.metaunix.net:BitGoblin/mcst.git"
+  },
+  "keywords": [
+    "minecraft",
+    "minecraft java edition",
+    "java"
+  ],
+  "author": "Gregory Ballantine <gballantine@bitgoblin.tech>",
+  "license": "BSD-2-Clause",
+  "dependencies": {
+    "config": "^3.3.8",
+    "express": "^4.18.1",
+    "pug": "^3.0.2"
+  }
+}

routes/home.js

@@ -0,0 +1,19 @@
+const config = require('config');
+const fs = require('fs');
+const path = require('path');
+const minecraft = require('../app/MinecraftServer');
+
+exports.getIndex = function(req, res) {
+  // search for minecraft server directories
+  let rootDir = config.get('server_directory');
+  let serverDirs = fs.readdirSync(rootDir);
+  let servers = [];
+  for (let i = 0; i < serverDirs.length; i++) {
+    servers.push(new minecraft.Server(path.join(rootDir, serverDirs[i])));
+  }
+
+  // render view
+  res.render('index', {
+    servers: servers,
+  });
+};

routes/server.js

@@ -0,0 +1,70 @@
+const config = require('config');
+const fs = require('fs');
+const https = require('https');
+const path = require('path');
+const minecraft = require('../app/MinecraftServer');
+
+exports.getCreate = function(req, res) {
+  // render view
+  res.render('create');
+};
+
+exports.postCreate = function(req, res) {
+  mcDir = config.get('server_directory');
+  serverDir = path.join(mcDir, req.body.serverName);
+
+  // make server directory
+  fs.mkdirSync(serverDir);
+
+  // grab the server JAR file
+  serverJarUrl = 'https://piston-data.mojang.com/v1/objects/f69c284232d7c7580bd89a5a4931c3581eae1378/server.jar';
+  serverJarName = "server_" + req.body.serverVersion + ".jar";
+  serverJarPath = path.join(serverDir, serverJarName);
+  https.get(serverJarUrl, (res) => {
+    const filePath = fs.createWriteStream(serverJarPath);
+    res.pipe(filePath);
+    filePath.on('finish', () => {
+      filePath.close();
+      console.log('Download Completed'); 
+    });
+  });
+
+  // create the start.sh shell script
+  scriptFilePath = path.join(serverDir, 'start.sh');
+  scriptContent = "#!/bin/sh\n\ncd " + serverDir + "\njava -Xmx2048M -Xms2048M -jar server_" + req.body.serverVersion + ".jar nogui &\n\necho \"$!\" > ./pid.txt";
+  fs.writeFileSync(scriptFilePath, scriptContent);
+  fs.chmodSync(scriptFilePath, 0o755);
+
+  // save the current version to a text file - this will hopefully be temporary solution
+  versionFilePath = path.join(serverDir, 'current_version.txt');
+  versionContent = req.body.serverVersion;
+  fs.writeFileSync(versionFilePath, versionContent);
+  fs.chmodSync(versionFilePath, 0o644);
+
+  // redirect the user back to the home page
+  res.redirect('/');
+};
+
+exports.getStart = function(req, res) {
+  let serverName = req.params.serverName;
+  let rootDir = config.get('server_directory');
+  let server = new minecraft.Server(path.join(rootDir, serverName));
+
+  // start the server
+  server.start();
+
+  // redirect the user back to the home page
+  res.redirect('/');
+};
+
+exports.getStop = function(req, res) {
+  let serverName = req.params.serverName;
+  let rootDir = config.get('server_directory');
+  let server = new minecraft.Server(path.join(rootDir, serverName));
+
+  // stop the server
+  server.stop();
+
+  // redirect the user back to the home page
+  res.redirect('/');
+};

static/css/wyrm.css

@@ -0,0 +1,46 @@
+body{
+  background-color: #e6e6e6;
+}
+
+/* set the max-width for centered content */
+.container{
+  max-width: 1100px;
+}
+
+#main-content{
+  margin-top: 25px;
+  padding: 12px 25px;
+  background: white;
+}
+
+/* global navigation bar styles */
+.navbar{
+  padding: 10px 18px;
+  background-color: #212121;
+  color: white;
+  font-size: 2.5rem;
+  font-weight: bold;
+}
+
+.navbar ul{
+  margin: 0;
+  padding: 0;
+  list-style: none;
+}
+
+.navbar li{
+  display: inline-block;
+  margin-bottom: 0;
+}
+.navbar li:not(:first-child){
+  margin-left: 10px;
+}
+
+.navbar li>a{
+  color: #eee;
+  text-decoration: none;
+  transition: color 220ms ease-in-out;
+}
+.navbar li>a:hover{
+  color: white;
+}

static/js/drake.js

@@ -0,0 +1,3 @@
+$(document).ready(function () {
+  // This will be used when needed
+});

views/create.pug

@@ -0,0 +1,24 @@
+extends layout.pug
+
+block content
+  header.row
+    div.columns.twelve
+      h1 Create new server
+
+  section.row
+    div.columns.twelve
+      form(action='/server/create', method='POST')
+        div.row
+          div.columns.six
+            label(for='serverName') Server name:
+            input#serverName.u-full-width(name='serverName', type='text', placeholder='MyServer')
+          div.columns.six
+            label(for='serverVersion') Minecraft version:
+            input#serverVersion.u-full-width(name='serverVersion', type='text', placeholder='1.19.2')
+
+        input(type='submit', value='Submit')
+
+  div.row
+    div.columns.twelve
+      p
+        a(href='/') Back

views/index.pug

@@ -0,0 +1,30 @@
+extends layout.pug
+
+block content
+  header.row
+    div.columns.twelve
+      h1 Welcome to MCST!
+      p Using MCST you can easily manage your Minecraft: Java Edition servers.
+
+  section.row
+    div.columns.twelve
+      h3 List of servers:
+      if servers.length < 1
+        p There are currently no servers registered.
+      else
+        table.u-full-width
+          thead
+            tr
+              th Server name
+              th Minecraft version
+              th State
+              th Actions
+          tbody
+            each m in servers
+              tr.serverItem
+                td.serverName= m.name
+                td.serverVersion= m.version
+                td.serverState= m.getStatus()
+                td
+                  a(href='/server/' + m.name + '/start') Start
+                  a(href='/server/' + m.name + '/stop') Stop

views/layout.pug

@@ -0,0 +1,21 @@
+doctype html
+html(lang="en")
+  head
+    title= pageTitle
+    link(rel='stylesheet', href='https://cdnjs.cloudflare.com/ajax/libs/skeleton/2.0.4/skeleton.min.css')
+    link(rel='stylesheet', href='/css/wyrm.css')
+    script(src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.1/jquery.min.js')
+    script(src='/js/drake.js')
+  body
+    // global navigation
+    nav.navbar
+      div.navbar-left
+        ul
+          li.menu-text MCST
+          li: a(href='/') Home
+          li: a(href='/server/create') Create
+          li: a(href='/status') Status
+
+    // main content
+    div#main-content.container
+      block content