Add MariaDB container; add PDO connection; add error middleware

.env.develop

@@ -1,7 +1,23 @@
 # .env.development: Environment variables for local development
 
-# Set composer cache directory
+# composer: Set cache directory
 COMPOSER_CACHE_DIR=./.composer
 
-# Disable Twig cache
+# MariaDB container
+MYSQL_RANDOM_ROOT_PASSWORD=yes
+MYSQL_DATABASE=mailusers
+MYSQL_USER=mailaccountadmin
+MYSQL_PASSWORD=mailaccountadmin
+
+# App settings
+APP_DEBUG=true
+
+# - Disable Twig cache
 TWIG_CACHE_DIR=
+TWIG_STRICT=true
+
+# - Database credentials
+DB_HOST=db
+DB_DATABASE=mailusers
+DB_USER=mailaccountadmin
+DB_PASSWORD=mailaccountadmin

docker-compose.yml

@@ -12,3 +12,18 @@ services:
     volumes:
       - ./:/var/www/
     user: ${DOCKER_UID}
+
+  db:
+    image: mariadb
+    env_file:
+      - .env.develop
+    volumes:
+      - db_data:/var/lib/mysql
+
+  adminer:
+    image: adminer
+    ports:
+      - 8099:8080
+
+volumes:
+  db_data:

public/index.php

@@ -13,7 +13,7 @@ $settings = new Settings();
 $container = Dependencies::createContainer($settings);
 $app = AppFactory::createFromContainer($container);
 
-Middlewares::setMiddlewares($app);
+Middlewares::setMiddlewares($app, $settings);
 Routes::setRoutes($app);
 
 $app->run();

src/Dependencies.php

@@ -5,14 +5,16 @@ namespace MailAccountAdmin;
 
 use DI\Container;
 use MailAccountAdmin\Login\LoginController;
+use PDO;
 use Psr\Container\ContainerInterface;
 use Slim\Views\Twig;
 
 class Dependencies
 {
-    private const SETTINGS = 'settings';
+    public const SETTINGS = 'settings';
-    private const TWIG = 'view';
+    public const TWIG = 'view';
     private const TWIG_TEMPLATE_DIR = __DIR__ . '/../templates';
+    public const DATABASE = 'database';
 
     public static function createContainer(Settings $settings): Container
     {
@@ -29,6 +31,22 @@ class Dependencies
             return Twig::create(self::TWIG_TEMPLATE_DIR, $settings->getTwigSettings());
         });
 
+        // Database connection
+        $container->set(self::DATABASE, function (ContainerInterface $c) {
+            /** @var Settings $settings */
+            $settings = $c->get(self::SETTINGS);
+            $dbSettings = $settings->getDatabaseSettings();
+
+            return new PDO(
+                "mysql:dbname={$dbSettings['dbname']};host={$dbSettings['host']};port={$dbSettings['port']}",
+                $dbSettings['username'],
+                $dbSettings['password'],
+                [
+                    PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
+                ],
+            );
+        });
+
         // Login, registration, authentication
         $container->set(LoginController::class, function (ContainerInterface $c) {
             return new LoginController(

src/Middlewares.php

@@ -8,8 +8,11 @@ use Slim\Views\TwigMiddleware;
 
 class Middlewares
 {
-    public static function setMiddlewares(App $app): void
+    public static function setMiddlewares(App $app, Settings $settings): void
     {
+        $displayErrorDetails = $settings->isDebugMode();
+
+        $app->addErrorMiddleware($displayErrorDetails, true, true);
         $app->add(TwigMiddleware::createFromContainer($app));
     }
 }

src/Settings.php

@@ -5,12 +5,27 @@ namespace MailAccountAdmin;
 
 class Settings
 {
+    public function isDebugMode(): bool
+    {
+        return getenv('APP_DEBUG') === 'true';
+    }
+
     public function getTwigSettings(): array
     {
-        $cacheDir = getenv('TWIG_CACHE_DIR');
-
         return [
-            'cache' => !empty($cacheDir) ? $cacheDir : false,
+            'cache' => getenv('TWIG_CACHE_DIR') ?: false,
+            'strict_variables' => getenv('TWIG_STRICT') === 'true',
+        ];
+    }
+
+    public function getDatabaseSettings(): array
+    {
+        return [
+            'host' => getenv('DB_HOST') ?: 'localhost',
+            'port' => getenv('DB_PORT') ?: 3306,
+            'dbname' => getenv('DB_DATABASE') ?: '',
+            'username' => getenv('DB_USERNAME') ?: '',
+            'password' => getenv('DB_PASSWORD') ?: '',
         ];
     }
 }