Hydrate nullable public component properties

src/CustomTag.php

@@ -3,6 +3,8 @@
 
 namespace LordSimal\CustomHtmlElements;
 
+use ReflectionObject;
+
 abstract class CustomTag
 {
     /**
@@ -23,8 +25,14 @@ public function __construct(
         public string $innerContent = '',
     ) {
         // Overwrite properties with what is given in the attributes
+        $reflection = new ReflectionObject($this);
         foreach ($attributes as $key => $value) {
-            if (isset($this->$key)) {
+            if (
+                $reflection->hasProperty($key)
+                && $reflection->getProperty($key)->isPublic()
+                && !$reflection->getProperty($key)->isStatic()
+                && $reflection->getProperty($key)->getDeclaringClass()->getName() !== self::class
+            ) {
                 $this->$key = $value;
             }
         }

tests/TagEngine/CustomTagsTest.php

@@ -4,13 +4,21 @@
 namespace LordSimal\CustomHtmlElements\Test\TagEngine;
 
 use LordSimal\CustomHtmlElements\TagEngine;
+use LordSimal\CustomHtmlElements\Test\Tags\ClassProperties;
 use PHPUnit\Framework\TestCase;
 
 /**
  * @see \LordSimal\CustomHtmlElements\TagEngine
  */
 class CustomTagsTest extends TestCase
 {
+    public function testHydratesNullablePublicProperty(): void
+    {
+        $tag = new ClassProperties(['nullable' => 'value']);
+
+        $this->assertSame('value', $tag->nullable);
+    }
+
     protected TagEngine $tagEngine;
 
     protected function setUp(): void

tests/Tags/ClassProperties.php

@@ -14,6 +14,8 @@ class ClassProperties extends CustomTag
 
     public string $test = 'default';
 
+    public ?string $nullable = null;
+
     public function render(): string
     {
         return <<< HTML