Added a page to create a Minecraft server; added config module

app/MinecraftServer.js

@@ -8,7 +8,9 @@ class Server {
 
     // read version file
     var versionFilePath = this.rootDir + '/current_version.txt';
-    this.version = fs.readFileSync(versionFilePath, {encoding:'utf8', flag:'r'});
+    if (fs.existsSync(versionFilePath)) {
+      this.version = fs.readFileSync(versionFilePath, {encoding:'utf8', flag:'r'});      
+    }
 
     // set server state
     if (fs.existsSync(this.pidFilePath)) {

config/default.json

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

index.js

@@ -5,11 +5,19 @@ 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);
 
 // set Express to serve static files (ideally this is only used in development)
 app.use(express.static('./static/'));

routes/home.js

@@ -1,8 +1,19 @@
+const config = require('config');
+const fs = require('fs');
+const path = require('path');
 const minecraft = require('../app/MinecraftServer');
 
 exports.getIndex = function(req, res) {
-  var server = new minecraft.Server('/opt/minecraft/bg_w3');
+  // 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: [server],
+    servers: servers,
   });
 };

routes/server.js

@@ -0,0 +1,45 @@
+const config = require('config');
+const fs = require('fs');
+const https = require('https');
+const path = require('path');
+
+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";
+  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('/');
+};

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/layout.pug

@@ -13,7 +13,7 @@ html(lang="en")
         ul
           li.menu-text MCST
           li: a(href='/') Home
-          li: a(href='/create') Create
+          li: a(href='/server/create') Create
           li: a(href='/status') Status
 
     // main content