Fix default values support for promoted constructor parameters

Author: SerafimArts

src/Mapping/Reader/ReflectionReader.php

@@ -5,7 +5,7 @@
 namespace TypeLang\Mapper\Mapping\Reader;
 
 use TypeLang\Mapper\Mapping\Reader\ReflectionReader\ClassReflectionLoaderInterface;
-use TypeLang\Mapper\Mapping\Reader\ReflectionReader\DefaultValueReflectionLoader;
+use TypeLang\Mapper\Mapping\Reader\ReflectionReader\DefaultValuePropertyReflectionLoader;
 use TypeLang\Mapper\Mapping\Reader\ReflectionReader\PropertyReflectionLoaderInterface;
 use TypeLang\Mapper\Mapping\Reader\ReflectionReader\TypePropertyReflectionLoader;
 
@@ -28,7 +28,7 @@ protected function createPropertyLoaders(): array
     {
         return [
             new TypePropertyReflectionLoader(),
-            new DefaultValueReflectionLoader(),
+            new DefaultValuePropertyReflectionLoader(),
         ];
     }
 }

src/Mapping/Reader/ReflectionReader/DefaultValuePropertyReflectionLoader.php

@@ -0,0 +1,74 @@
+<?php
+
+declare(strict_types=1);
+
+namespace TypeLang\Mapper\Mapping\Reader\ReflectionReader;
+
+use TypeLang\Mapper\Mapping\Metadata\ClassMetadata\PropertyInfo;
+use TypeLang\Mapper\Mapping\Metadata\ClassMetadata\PropertyMetadata\DefaultValueInfo;
+
+final class DefaultValuePropertyReflectionLoader extends PropertyReflectionLoader
+{
+    public function load(PropertyInfo $info, \ReflectionProperty $property): void
+    {
+        $this->loadPropertyDefaultValue($info, $property);
+        $this->loadPromotedPropertyDefaultValue($info, $property);
+    }
+
+    private function loadPromotedPropertyDefaultValue(PropertyInfo $info, \ReflectionProperty $property): void
+    {
+        if (!$property->isPromoted()) {
+            return;
+        }
+
+        $parameter = $this->findParameterByProperty($property);
+
+        if ($parameter === null) {
+            return;
+        }
+
+        if (!$parameter->isDefaultValueAvailable()) {
+            return;
+        }
+
+        $info->default = new DefaultValueInfo(
+            value: $parameter->getDefaultValue(),
+        );
+    }
+
+    private function findParameterByProperty(\ReflectionProperty $property): ?\ReflectionParameter
+    {
+        $class = $property->getDeclaringClass();
+        $constructor = $class->getConstructor();
+
+        if ($constructor === null) {
+            return null;
+        }
+
+        foreach ($constructor->getParameters() as $parameter) {
+            // Skip non-promoted properties
+            if (!$parameter->isPromoted()) {
+                continue;
+            }
+
+            if ($parameter->name === $property->name) {
+                return $parameter;
+            }
+        }
+
+        return null;
+    }
+
+    private function loadPropertyDefaultValue(PropertyInfo $info, \ReflectionProperty $property): void
+    {
+        if (!$property->hasDefaultValue()) {
+            $this->loadPromotedPropertyDefaultValue($info, $property);
+
+            return;
+        }
+
+        $info->default = new DefaultValueInfo(
+            value: $property->getDefaultValue(),
+        );
+    }
+}