Added the ability to create a new server

src/routes.php

@@ -13,3 +13,38 @@ $app->get('/', function (Request $request, Response $response, $args) {
     'server_dir' => $config->get('server_directory'),
   ]);
 })->setName('index');
+
+// create GET route - this page allows a user to create a new server instance
+$app->get('/create', function (Request $request, Response $response, $args) {
+  $view = Twig::fromRequest($request);
+  return $view->render($response, 'create.twig');
+})->setName('create');
+
+// create POST route - processes the new server creation
+$app->post('/create', function (Request $request, Response $response, $args) {
+  // set up the POST parameters and grab our config
+  $params = (array)$request->getParsedBody();
+  $config = $this->get('config');
+
+  // create our server directory
+  $serverDir = join('/', array($config->get('server_directory'), $params['serverName']));
+  mkdir($serverDir);
+
+  // grab the server JAR file
+  $serverJarUrl = "https://piston-data.mojang.com/v1/objects/f69c284232d7c7580bd89a5a4931c3581eae1378/server.jar";
+  $serverJarName = "server_" . $params['serverVersion'] . ".jar";
+  $serverJarPath = join('/', array($serverDir, $serverJarName));
+  file_put_contents($serverJarPath, file_get_contents($serverJarUrl));
+
+  // create the start.sh shell script
+  $scriptFilePath = join('/', array($serverDir, 'start.sh'));
+  $scriptFile = fopen($scriptFilePath, 'w');
+  $scriptContent = "#!/bin/sh\n\ncd " . $serverDir . "\njava -Xmx2048M -Xms2048M -jar server_1.19.2.jar nogui";
+  fwrite($scriptFile, $scriptContent);
+  fclose($scriptFile);
+  chmod($scriptFilePath, 0755);
+
+  return $response
+    ->withHeader('Location', '/')
+    ->withStatus(302);
+});

views/create.twig

@@ -0,0 +1,40 @@
+{% extends 'layout.twig' %}
+
+{% block content %}
+
+<!-- page header -->
+<header class="row">
+  <div class="columns twelve">
+    <h1>Create new server</h1>
+  </div>
+</header>
+
+<!-- create server form -->
+<section class="row">
+  <div class="columns twelve">
+    <form action="/create" method="POST">
+      <div class="row">
+        <div class="columns six">
+          <label for="serverName">Server name:</label>
+          <input id="serverName" name="serverName" class="u-full-width" type="text" placeholder="MyServer">
+        </div>
+
+        <div class="columns six">
+          <label for="serverVersion">Minecraft version:</label>
+          <input id="serverVersion" name="serverVersion" class="u-full-width" type="text" placeholder="1.19.2">
+        </div>
+      </div>
+
+      <input type="submit" value="Submit">
+    </form>
+  </div>
+</section>
+
+<!-- lower navigation -->
+<div class="row">
+  <div class="columns twelve">
+    <p><a href="/">Back</a></p>
+  </div>
+</div>
+
+{% endblock %}