allowed registering rss extensions by Nette DIC extension

src/Bridges/NetteDI/RssExtension.php

@@ -7,6 +7,7 @@
 use Nette\DI\Definitions\ServiceDefinition;
 use Nexendrie\Rss\Generator;
 use Nette\Schema\Expect;
+use Nexendrie\Rss\InvalidRssExtension;
 use Nexendrie\Rss\IRssExtension;
 
 /**
@@ -15,6 +16,7 @@
  * @author Jakub Konečný
  */
 final class RssExtension extends CompilerExtension {
+  /** @internal */
   public const SERVICE_GENERATOR = "generator";
 
   protected function setProperty(ServiceDefinition &$generator, \stdClass $config, string $property): void {
@@ -28,6 +30,7 @@ public function getConfigSchema(): \Nette\Schema\Schema {
       "shortenDescription" => Expect::int(150),
       "dateTimeFormat" => Expect::string(""),
       "template" => Expect::string(""),
+      "extensions" => Expect::arrayOf("class")->default([]),
     ]);
   }
 
@@ -40,6 +43,14 @@ public function loadConfiguration(): void {
       ->addSetup('$service->shortenDescription = ?', [$config->shortenDescription]);
     $this->setProperty($generator, $config, "dateTimeFormat");
     $this->setProperty($generator, $config, "template");
+    /** @var string $extension */
+    foreach($config->extensions as $index => $extension) {
+      if(!class_exists($extension) || !is_subclass_of($extension, IRssExtension::class)) {
+        throw new InvalidRssExtension("Invalid RSS extension $extension.");
+      }
+      $builder->addDefinition($this->prefix("extension.$index"))
+        ->setType($extension);
+    }
   }
 
   public function beforeCompile() {

src/InvalidRssExtension.php

@@ -0,0 +1,10 @@
+<?php
+declare(strict_types=1);
+
+namespace Nexendrie\Rss;
+
+class InvalidRssExtension extends \RuntimeException {
+
+}
+
+?>

tests/Nexendrie/Rss/Bridges/NetteDI/RssExtensionTest.phpt

@@ -4,6 +4,7 @@ declare(strict_types=1);
 namespace Nexendrie\Rss\Bridges\NetteDI;
 
 use Nexendrie\Rss\Extensions\TestExtension;
+use Nexendrie\Rss\InvalidRssExtension;
 use Tester\Assert;
 use Nexendrie\Rss\Generator;
 
@@ -58,7 +59,16 @@ final class RssExtensionTest extends \Tester\TestCase {
   }
 
   public function testExtensions() {
-    $this->refreshContainer(["services" => [TestExtension::class]]);
+    Assert::exception(function() {
+      $this->refreshContainer(["rss" => [
+        "extensions" => [
+          \stdClass::class,
+        ],
+      ]]);
+    }, InvalidRssExtension::class);
+    $this->refreshContainer(["rss" => [
+      "extensions" => [TestExtension::class],
+    ]]);
     /** @var Generator $generator */
     $generator = $this->getService(Generator::class);
     Assert::count(1, $generator->extensions->getItems(["%class%" => TestExtension::class]));