Add ability to set theme from markdown

Author: aarondfrancis

CHANGELOG.md

@@ -1,5 +1,16 @@
 # Changelog
 
+## 0.3.1 - 2021-06-17
+
+### Added
+- Ability to set a theme per block by using `theme:name` syntax, e.g.:
+
+````
+```php theme:dark-plus
+// Use dark-plus for this block.
+```
+````
+
 ## 0.3.0 - 2021-05-28
 
 - Bump `torchlight/torchlight-laravel` dependency.

src/TorchlightExtension.php

@@ -2,6 +2,7 @@
 
 namespace Torchlight\Commonmark;
 
+use Illuminate\Support\Str;
 use League\CommonMark\Block\Element\AbstractBlock;
 use League\CommonMark\Block\Element\FencedCode;
 use League\CommonMark\Block\Element\IndentedCode;
@@ -73,6 +74,7 @@ protected function makeTorchlightBlock($node)
     {
         return Block::make()
             ->language($this->getLanguage($node))
+            ->theme($this->getTheme($node))
             ->code($node->getStringContent());
     }
 
@@ -81,18 +83,31 @@ protected function isCodeNode($node)
         return $node instanceof FencedCode || $node instanceof IndentedCode;
     }
 
-    protected function getLanguage($node)
+    protected function getInfo($node)
     {
         if (!$this->isCodeNode($node) || $node instanceof IndentedCode) {
             return null;
         }
 
         $infoWords = $node->getInfoWords();
 
-        if (empty($infoWords) || empty($infoWords[0])) {
-            return null;
-        }
+        return empty($infoWords) ? [] : $infoWords;
+    }
+
+    protected function getLanguage($node)
+    {
+        $language = $this->getInfo($node)[0];
 
-        return Xml::escape($infoWords[0], true);
+        return $language ? Xml::escape($language, true) : null;
     }
+
+    protected function getTheme($node)
+    {
+        foreach ($this->getInfo($node) as $item) {
+            if (Str::startsWith($item, 'theme:')) {
+                return Str::after($item, 'theme:');
+            }
+        }
+    }
+
 }

tests/CodeRendererTest.php

@@ -93,7 +93,31 @@ public function gets_language_and_contents()
 
         Http::assertSent(function ($request) {
             return $request['blocks'][0]['language'] === 'foobarlang'
-                && $request['blocks'][0]['code'] === '<div>test</div>';
+                && $request['blocks'][0]['code'] === '<div>test</div>'
+                && $request['blocks'][0]['theme'] === null;
+        });
+    }
+
+    /** @test */
+    public function can_set_theme()
+    {
+        $markdown = <<<'EOT'
+before
+
+```lang theme:daft-punk 
+<div>test</div>
+```
+after
+EOT;
+
+        Http::fake();
+
+        $this->render($markdown);
+
+        Http::assertSent(function ($request) {
+            return $request['blocks'][0]['language'] === 'lang'
+                && $request['blocks'][0]['code'] === '<div>test</div>'
+                && $request['blocks'][0]['theme'] === 'daft-punk';
         });
     }