Use css.twig file instead of txt file

src/DependencyInjection/SetonoSyliusGiftCardExtension.php

@@ -23,23 +23,11 @@ public function load(array $configs, ContainerBuilder $container): void
 
         $container->setParameter('setono_sylius_gift_card.code_length', $config['code_length']);
 
-        // Load default CSS file path
-        if ($container->hasParameter('kernel.project_dir')) {
-            /**
-             * @psalm-suppress UndefinedDocblockClass
-             *
-             * @var string $kernelProjectDir
-             */
-            $kernelProjectDir = $container->getParameter('kernel.project_dir');
-            $fileLocator = new FileLocator([
-                $kernelProjectDir . '/private',
-                __DIR__ . '/../Resources/private',
-            ]);
-            $container->setParameter(
-                'setono_sylius_gift_card.default_css_file_path',
-                $fileLocator->locate('default-gift-card-configuration-css.txt')
-            );
-        }
+        // Load default CSS file
+        $container->setParameter(
+            'setono_sylius_gift_card.default_css_file',
+            '@SetonoSyliusGiftCardPlugin/Shop/GiftCard/defaultGiftCardConfiguration.css.twig'
+        );
 
         $this->registerResources('setono_sylius_gift_card', $config['driver'], $config['resources'], $container);
 

src/Provider/DefaultPdfCssProvider.php

@@ -4,24 +4,22 @@
 
 namespace Setono\SyliusGiftCardPlugin\Provider;
 
+use Twig\Environment;
+
 final class DefaultPdfCssProvider implements DefaultPdfCssProviderInterface
 {
-    private string $defaultCssFilePath;
+    private string $defaultCssFile;
+
+    private Environment $twig;
 
-    public function __construct(string $defaultCssFilePath)
+    public function __construct(string $defaultCssFile, Environment $twig)
     {
-        $this->defaultCssFilePath = $defaultCssFilePath;
+        $this->defaultCssFile = $defaultCssFile;
+        $this->twig = $twig;
     }
 
     public function getDefaultCss(): string
     {
-        // TODO: When dropping Symfony 4.4, switch to Symfony File class
-        $content = file_get_contents($this->defaultCssFilePath);
-
-        if (false === $content) {
-            return '';
-        }
-
-        return $content;
+        return $this->twig->render($this->defaultCssFile);
     }
 }

src/Resources/config/services/provider.xml

@@ -31,7 +31,8 @@
 
         <service id="setono_sylius_gift_card.provider.default_pdf_css"
                  class="Setono\SyliusGiftCardPlugin\Provider\DefaultPdfCssProvider">
-            <argument>%setono_sylius_gift_card.default_css_file_path%</argument>
+            <argument>%setono_sylius_gift_card.default_css_file%</argument>
+            <argument type="service" id="twig"/>
         </service>
         <service id="Setono\SyliusGiftCardPlugin\Provider\DefaultPdfCssProviderInterface"
                  alias="setono_sylius_gift_card.provider.default_pdf_css"/>

tests/Unit/Provider/DefaultPdfCssProviderTest.php

@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\Setono\SyliusGiftCardPlugin\Unit\Provider;
+
+use PHPUnit\Framework\TestCase;
+use Prophecy\PhpUnit\ProphecyTrait;
+use Setono\SyliusGiftCardPlugin\Provider\DefaultPdfCssProvider;
+use Twig\Environment;
+
+final class DefaultPdfCssProviderTest extends TestCase
+{
+    use ProphecyTrait;
+
+    /**
+     * @test
+     */
+    public function it_provides_default_css_from_template(): void
+    {
+        $css = 'body{font-size: 2rem;}';
+        $cssTemplateFile = '@Super/template.css.twig';
+        $twig = $this->prophesize(Environment::class);
+        $twig->render($cssTemplateFile)->willReturn($css);
+
+        $defaultPdfCssProvider = new DefaultPdfCssProvider($cssTemplateFile, $twig->reveal());
+
+        $this->assertEquals($css, $defaultPdfCssProvider->getDefaultCss());
+    }
+}