Extract generating hook name outside the HooksRuntime

src/TwigHooks/src/Hook/NameGenerator/NameGeneratorInterface.php

@@ -0,0 +1,10 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sylius\TwigHooks\Hook\NameGenerator;
+
+interface NameGeneratorInterface
+{
+    public function generate(string $input, string ...$parts): string;
+}

src/TwigHooks/src/Hook/NameGenerator/TemplateNameGenerator.php

@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sylius\TwigHooks\Hook\NameGenerator;
+
+final class TemplateNameGenerator implements NameGeneratorInterface
+{
+    public function generate(string $input, string ...$parts): string
+    {
+        $templatePath = $this->normalizeTemplatePath($input);
+        $normalizedParts = array_map($this->normalizeString(...), $parts);
+
+        return implode('.', array_merge([$templatePath], $normalizedParts));
+    }
+
+    private function normalizeTemplatePath(string $templatePath): string
+    {
+        $parts = explode('/', $templatePath);
+        $resultParts = [];
+
+        foreach ($parts as $part) {
+            $resultPart = str_replace(['@', '.html.twig'], '', $part);
+            $resultPart = $this->normalizeString($resultPart);
+            $resultParts[] = $resultPart;
+        }
+
+        return implode('.', $resultParts);
+    }
+
+    private function normalizeString(string $string): string
+    {
+        $result = trim($string, '_');
+        /** @var string $result */
+        $result = preg_replace('/(?<!^)[A-Z]/', '_$0', $result);
+
+        return strtolower($result);
+    }
+}

src/TwigHooks/src/Twig/Runtime/HooksRuntime.php

@@ -4,6 +4,7 @@
 
 namespace Sylius\TwigHooks\Twig\Runtime;
 
+use Sylius\TwigHooks\Hook\NameGenerator\NameGeneratorInterface;
 use Sylius\TwigHooks\Hook\Renderer\HookRendererInterface;
 use Twig\Extension\RuntimeExtensionInterface;
 
@@ -15,37 +16,13 @@ final class HooksRuntime implements RuntimeExtensionInterface
 
     public function __construct (
         private readonly HookRendererInterface $hookRenderer,
+        private readonly NameGeneratorInterface $nameGenerator,
     ) {
     }
 
     public function createHookName(string $base, string ...$parts): string
     {
-        if ([] === $parts) {
-            return $this->formatBaseString($base);
-        }
-
-        return sprintf(
-            '%s.%s',
-            $this->formatBaseString($base),
-            implode('.', $parts),
-        );
-    }
-
-    private function formatBaseString(string $base): string
-    {
-        $parts = explode('/', $base);
-        $resultParts = [];
-
-        foreach ($parts as $part) {
-            $resultPart = trim($part, '_');
-            $resultPart = str_replace(['@', '.html.twig'], '', $resultPart);
-            /** @var string $resultPart */
-            $resultPart = preg_replace('/(?<!^)[A-Z]/', '_$0', $resultPart);
-            $resultPart = strtolower($resultPart);
-            $resultParts[] = $resultPart;
-        }
-
-        return implode('.', $resultParts);
+        return $this->nameGenerator->generate($base, ...$parts);
     }
 
     /**

src/TwigHooks/tests/Unit/Hook/NameGenerator/TemplateNameGeneratorTest.php

@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\Sylius\TwigHooks\Unit\Hook\NameGenerator;
+
+use PHPUnit\Framework\TestCase;
+use Sylius\TwigHooks\Hook\NameGenerator\TemplateNameGenerator;
+
+final class TemplateNameGeneratorTest extends TestCase
+{
+    /**
+     * @dataProvider itGeneratesNameDataProvider
+     */
+    public function testItGeneratesName(string $input, array $extraParts, string $expectedResult): void
+    {
+        $subject = $this->createTestSubject();
+
+        self::assertSame($expectedResult, $subject->generate($input, ...$extraParts));
+    }
+
+    public function itGeneratesNameDataProvider(): array
+    {
+        return [
+            ['@SyliusShop/layout.html.twig', ['header'], 'sylius_shop.layout.header'],
+            ['@SyliusShop/layout.html.twig', ['header', 'menu'], 'sylius_shop.layout.header.menu'],
+            ['@SyliusShop/layout.html.twig', ['header', 'menu', 'footer'], 'sylius_shop.layout.header.menu.footer'],
+            ['@SyliusShop/_template.html.twig', [], 'sylius_shop.template'],
+            ['@SyliusShop/_template.html.twig', ['header'], 'sylius_shop.template.header'],
+            ['@SyliusShop/_template.html.twig', ['header', 'hamburger_menu'], 'sylius_shop.template.header.hamburger_menu'],
+            ['@SyliusShop/_template.html.twig', ['header', 'hamburgerMenu'], 'sylius_shop.template.header.hamburger_menu'],
+        ];
+    }
+
+    private function createTestSubject(): TemplateNameGenerator
+    {
+        return new TemplateNameGenerator();
+    }
+}