Slim 4

.travis.yml

@@ -1,15 +1,23 @@
 language: php
 
+notifications:
+  email:
+    on_success: never
+
 php:
-  - 7.0
   - 7.1
   - 7.2
+  - 7.3
 
 matrix:
   include:
-    - php: 7.0
+    - php: 7.1
       env: dependencies=lowest
 
+cache:
+  directories:
+    - $HOME/.composer/cache
+
 sudo: false
 
 before_script:

composer.json

@@ -14,12 +14,13 @@
         }
     },
     "require": {
-        "php": "~7.0",
+        "php": "~7.1",
         "php-di/php-di": "^6.0.0",
         "php-di/invoker": "^2.0.0",
-        "slim/slim": "^3.9.0"
+        "slim/slim": "^4.0.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "~6.0"
+        "phpunit/phpunit": "~6.0",
+        "zendframework/zend-diactoros": "^2.1"
     }
 }

src/Bridge.php

@@ -0,0 +1,55 @@
+<?php declare(strict_types=1);
+
+namespace DI\Bridge\Slim;
+
+use DI\Container;
+use Invoker\Invoker;
+use Invoker\ParameterResolver\AssociativeArrayResolver;
+use Invoker\ParameterResolver\Container\TypeHintContainerResolver;
+use Invoker\ParameterResolver\DefaultValueResolver;
+use Invoker\ParameterResolver\ResolverChain;
+use Psr\Container\ContainerInterface;
+use Slim\App;
+use Slim\Factory\AppFactory;
+use \Invoker\CallableResolver as InvokerCallableResolver;
+
+/**
+ * This factory creates a Slim application correctly configured with PHP-DI.
+ *
+ * To use this, replace `Slim\Factory\AppFactory::create()`
+ * with `DI\Bridge\Slim\Bridge::create()`.
+ */
+class Bridge
+{
+    public static function create(ContainerInterface $container = null): App
+    {
+        $container = $container ?: new Container;
+
+        AppFactory::setContainer($container);
+        $callableResolver = new InvokerCallableResolver($container);
+        AppFactory::setCallableResolver(new CallableResolver($callableResolver));
+
+        $app = AppFactory::create();
+
+        $controllerInvoker = self::createControllerInvoker($container);
+        $app->getRouteCollector()->setDefaultInvocationStrategy($controllerInvoker);
+
+        return $app;
+    }
+
+    private static function createControllerInvoker(ContainerInterface $container): ControllerInvoker
+    {
+        $resolvers = [
+            // Inject parameters by name first
+            new AssociativeArrayResolver(),
+            // Then inject services by type-hints for those that weren't resolved
+            new TypeHintContainerResolver($container),
+            // Then fall back on parameters default values for optional route parameters
+            new DefaultValueResolver(),
+        ];
+
+        $invoker = new Invoker(new ResolverChain($resolvers), $container);
+
+        return new ControllerInvoker($invoker);
+    }
+}

src/CallableResolver.php

@@ -18,11 +18,10 @@ public function __construct(\Invoker\CallableResolver $callableResolver)
     {
         $this->callableResolver = $callableResolver;
     }
-
     /**
      * {@inheritdoc}
      */
-    public function resolve($toResolve)
+    public function resolve($toResolve): callable
     {
         return $this->callableResolver->resolve($toResolve);
     }

src/ControllerInvoker.php

@@ -18,7 +18,6 @@ public function __construct(InvokerInterface $invoker)
     {
         $this->invoker = $invoker;
     }
-
     /**
      * Invoke a route callable.
      *
@@ -34,16 +33,14 @@ public function __invoke(
         ServerRequestInterface $request,
         ResponseInterface $response,
         array $routeArguments
-    ) {
+    ): ResponseInterface {
         // Inject the request and response by parameter name
         $parameters = [
             'request'  => $request,
             'response' => $response,
         ];
-
         // Inject the route arguments by name
         $parameters += $routeArguments;
-
         // Inject the attributes defined on the request
         $parameters += $request->getAttributes();
 

tests/ApplicationTest.php

@@ -2,10 +2,9 @@
 
 namespace DI\Bridge\Slim\Test;
 
-use DI\Bridge\Slim\App;
+use DI\Bridge\Slim\Bridge;
 use DI\Bridge\Slim\Test\Mock\RequestFactory;
 use PHPUnit\Framework\TestCase;
-use Slim\Http\Response;
 
 class ApplicationTest extends TestCase
 {
@@ -14,14 +13,15 @@ class ApplicationTest extends TestCase
      */
     public function runs()
     {
-        $app = new App;
+        $app = Bridge::create();
 
         $called = false;
-        $app->get('/', function () use (&$called) {
+        $app->get('/', function ($request, $response) use (&$called) {
             $called = true;
+            return $response;
         });
+        $app->handle(RequestFactory::create());
 
-        $app->callMiddlewareStack(RequestFactory::create(), new Response);
         $this->assertTrue($called);
     }
 }