Added app and PHP version displays to the footer

src/Middleware/AppInfo.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace BitGoblin\Colossus\Middleware;
+
+use Psr\Http\Message\ServerRequestInterface as Request;
+
+class AppInfo {
+
+	protected $view;
+
+	public function __construct($view) {
+		$this->view = $view;
+	}
+
+	public function __invoke(Request $request, $handler) {
+		// add running app version
+		$composer = json_decode(file_get_contents(__DIR__ . '/../../composer.json'), true);
+		$this->view->getEnvironment()->addGlobal('APP_VERSION', $composer['version'] ?? 'unknown');
+
+		// add running PHP version
+		$this->view->getEnvironment()->addGlobal('PHP_VERSION', PHP_VERSION);
+
+		return $handler->handle($request);
+	}
+
+}

src/app.php

@@ -9,6 +9,8 @@ use Slim\Factory\AppFactory;
 use Slim\Views\Twig;
 use Slim\Views\TwigMiddleware;
 
+use BitGoblin\Colossus\Middleware\AppInfo;
+
 require __DIR__ . '/../vendor/autoload.php';
 
 // Load app configuration
@@ -38,5 +40,8 @@ $twig = Twig::create(__DIR__ . '/../views', ['cache' => false]);
 // Add Twig-View Middleware
 $app->add(TwigMiddleware::create($app, $twig));
 
+// Add middleware for injecting global vars for app's info
+$app->add(new AppInfo($twig));
+
 // Register routes
 require_once __DIR__ . '/routes.php';