Add CSS content support - Fixes #319

Author: Muffinman

config/css-inliner.php

@@ -15,4 +15,16 @@
 
     'css-files' => [],
 
+    /*
+    |--------------------------------------------------------------------------
+    | Css Content
+    |--------------------------------------------------------------------------
+    |
+    | Optionally, you may prefer to provide the CSS content as a String.
+    | This allows for compatibility with Vite by using Vite::content()
+    | If supplied, this string will be appended after your css-files.
+    |
+    */
+
+    'css-content' => null,
 ];

src/CssInlinerPlugin.php

@@ -8,20 +8,23 @@
 use Symfony\Component\Mailer\Event\MessageEvent;
 use Symfony\Component\Mime\Part\AbstractPart;
 use Symfony\Component\Mime\Part\AbstractMultipartPart;
-use Symfony\Component\Mime\Part\Multipart\AlternativePart;
-use Symfony\Component\Mime\Part\Multipart\MixedPart;
 use Symfony\Component\Mime\Part\TextPart;
 use TijsVerkoyen\CssToInlineStyles\CssToInlineStyles;
 
 class CssInlinerPlugin
 {
+    private array $config;
+
     private CssToInlineStyles $converter;
 
     private string $cssToAlwaysInclude;
 
-    public function __construct(array $filesToInline = [], ?CssToInlineStyles $converter = null)
+    public function __construct(array $config, ?CssToInlineStyles $converter = null)
     {
-        $this->cssToAlwaysInclude = $this->loadCssFromFiles($filesToInline);
+
+        $this->config = $config;
+
+        $this->buildCssContent();
 
         $this->converter = $converter ?? new CssToInlineStyles;
     }
@@ -48,6 +51,30 @@ public function handleSymfonyEvent(MessageEvent $event): void
         $this->handleSymfonyEmail($message);
     }
 
+    private function buildCssContent(): void
+    {
+        $this->addCssFromFiles();
+        $this->addCssFromContent();
+    }
+
+    private function addCssFromFiles(): void
+    {
+        $filesToInline = $this->config['css-files'] ?? [];
+
+        $this->cssToAlwaysInclude = $this->loadCssFromFiles($filesToInline);
+    }
+
+    private function addCssFromContent(): void
+    {
+        $contentToInline = $this->config['css-content'] ?? null;
+
+        if (! $contentToInline) {
+            return;
+        }
+
+        $this->cssToAlwaysInclude .= $contentToInline;
+    }
+
     private function processPart(AbstractPart $part): AbstractPart
     {
         if ($part instanceof TextPart && $part->getMediaType() === 'text' && $part->getMediaSubtype() === 'html') {

src/LaravelMailCssInlinerServiceProvider.php

@@ -28,7 +28,7 @@ public function register(): void
         $this->mergeConfigFrom(__DIR__ . '/../config/css-inliner.php', 'css-files');
 
         $this->app->singleton(CssInlinerPlugin::class, function ($app) {
-            return new CssInlinerPlugin($app['config']->get('css-inliner.css-files', []));
+            return new CssInlinerPlugin($app['config']->get('css-inliner', []));
         });
 
         Event::listen(MessageSending::class, CssInlinerPlugin::class);

tests/CssInlinerPluginTest.php

@@ -85,6 +85,17 @@ public function test_it_should_convert_html_body_with_given_css(): void
         $this->assertBodyMatchesStub($message, 'converted-html-with-css');
     }
 
+    public function test_it_should_convert_html_body_with_given_css_content(): void
+    {
+        $message = $this->fakeSendMessageUsingInlinePlugin(
+            (new Email)->html($this->stubs['original-html-with-css']),
+            [],
+            file_get_contents(__DIR__ . '/css/test.css')
+        );
+
+        $this->assertBodyMatchesStub($message, 'converted-html-with-css');
+    }
+
     public function test_it_should_convert_html_body_with_given_css_and_attachment(): void
     {
         $originalMessage = $this->createMessageToSend(
@@ -305,13 +316,16 @@ private function getTextFromPart(AbstractPart $part, string $mediaSubType = 'htm
         return null;
     }
 
-    private function fakeSendMessageUsingInlinePlugin(Email $message, array $inlineCssFiles = []): Email
+    private function fakeSendMessageUsingInlinePlugin(Email $message, array $inlineCssFiles = [], string $inlineCssContent = null): Email
     {
         $processedMessage = null;
 
         $dispatcher = new EventDispatcher;
-        $dispatcher->addListener(MessageEvent::class, static function (MessageEvent $event) use ($inlineCssFiles, &$processedMessage) {
-            $handler = new CssInlinerPlugin($inlineCssFiles);
+        $dispatcher->addListener(MessageEvent::class, static function (MessageEvent $event) use ($inlineCssFiles, $inlineCssContent, &$processedMessage) {
+            $handler = new CssInlinerPlugin([
+                'css-files' => $inlineCssFiles,
+                'css-content' => $inlineCssContent,
+            ]);
 
             $handler->handleSymfonyEvent($event);