Refactored the attributes to use there own handler classes

composer.json

@@ -27,6 +27,7 @@
     },
     "scripts": {
         "test": "vendor/bin/pest",
-        "analyse": "vendor/bin/phpstan analyse src --level=9"
+        "analyse": "vendor/bin/phpstan analyse src --level=9",
+        "tmp": "php tmp.php"
     }
 }

src/Attribute/AttributeHandlerInterface.php

@@ -0,0 +1,8 @@
+<?php
+
+namespace Tibisoft\AutoTransformer\Attribute;
+
+interface AttributeHandlerInterface
+{
+    public function handle(BaseAttribute $attribute, \ReflectionClass $reflectionFrom, \ReflectionProperty $property, object $to, object $from): void;
+}

src/Attribute/BaseAttribute.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace Tibisoft\AutoTransformer\Attribute;
+
+abstract class BaseAttribute
+{
+    public function isHandledBy(): string
+    {
+        return static::class . 'Handler';
+    }
+}

src/Attribute/Count.php

@@ -3,7 +3,7 @@
 namespace Tibisoft\AutoTransformer\Attribute;
 
 #[\Attribute(\Attribute::TARGET_PROPERTY)]
-class Count
+class Count extends BaseAttribute
 {
 
 }

src/Attribute/CountHandler.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace Tibisoft\AutoTransformer\Attribute;
+
+class CountHandler implements AttributeHandlerInterface
+{
+    public function handle(BaseAttribute $attribute, \ReflectionClass $reflectionFrom, \ReflectionProperty $property, object $to, object $from): void
+    {
+        $propertyFrom = $reflectionFrom->getProperty($property->getName());
+        $value = $propertyFrom->getValue($from);
+        if(is_countable($value)) {
+            $property->setValue($to, count($value));
+        } else {
+            $property->setValue($to, 0);
+        }
+    }
+}

src/Attribute/Synonyms.php

@@ -6,7 +6,7 @@
 use Assert\Assertion;
 
 #[\Attribute(\Attribute::TARGET_PROPERTY)]
-class Synonyms
+class Synonyms extends BaseAttribute
 {
     /**
      * @param array<int, string> $synonyms

src/Attribute/SynonymsHandler.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace Tibisoft\AutoTransformer\Attribute;
+
+use Tibisoft\AutoTransformer\Exception\TransformException;
+
+class SynonymsHandler implements AttributeHandlerInterface
+{
+    public function handle(BaseAttribute $attribute, \ReflectionClass $reflectionFrom, \ReflectionProperty $property, object $to, object $from): void
+    {
+        if(!($attribute instanceof Synonyms)) {
+            return;
+        }
+
+        //find the first match!
+        foreach ($attribute->synonyms as $synonym) {
+            $this->setPropertyValue($reflectionFrom, $property, $to, $from, $synonym);
+        }
+    }
+
+    /**
+     * @param \ReflectionClass $reflectionFrom
+     * @param \ReflectionProperty $property
+     * @param object $to
+     * @param object $from
+     * @param string $propertyName
+     *
+     * @return void
+     */
+    public function setPropertyValue(\ReflectionClass $reflectionFrom, \ReflectionProperty $property, object $to, object $from, string $propertyName = ''): void
+    {
+        $propertyName = ($propertyName === '') ? $property->getName() : $propertyName;
+
+        try {
+            if (!$reflectionFrom->hasProperty($propertyName)) {
+                return;
+            }
+
+            $propertyFrom = $reflectionFrom->getProperty($propertyName);
+            $property->setValue($to, $propertyFrom->getValue($from));
+        } catch (\ReflectionException|\TypeError $typeError) {
+            throw new TransformException($typeError->getMessage());
+        }
+    }
+}

src/AutoTransformer.php

@@ -2,6 +2,8 @@
 
 namespace Tibisoft\AutoTransformer;
 
+use Tibisoft\AutoTransformer\Attribute\AttributeHandlerInterface;
+use Tibisoft\AutoTransformer\Attribute\BaseAttribute;
 use Tibisoft\AutoTransformer\Attribute\Count;
 use Tibisoft\AutoTransformer\Attribute\Synonyms;
 use Tibisoft\AutoTransformer\Exception\TransformException;
@@ -16,25 +18,23 @@ public function transform(object $from, string $to): object
 
         foreach ($reflectionTo->getProperties() as $property) {
             //look for attribute
-            $attributes = $property->getAttributes(Synonyms::class);
-            if (count($attributes) > 0) {
-               //find the first match!
-                foreach ($attributes[0]->getArguments()[0] as $synonym) {
-                    $this->setPropertyValue($reflectionFrom, $property, $to, $from, $synonym);
-                    continue 2;
-                }
-            }
+            $attributes = $property->getAttributes();
 
-            $attributes = $property->getAttributes(Count::class);
-            if (count($attributes) > 0) {
-                $propertyFrom = $reflectionFrom->getProperty($property->getName());
-                $value = $propertyFrom->getValue($from);
-                if(is_countable($value)) {
-                    $property->setValue($to, count($value));
-                } else {
-                    $property->setValue($to, 0);
+            var_dump($attributes);
+
+            /** @var \ReflectionAttribute $attribute */
+            foreach($attributes as $attribute) {
+                $attribute = $attribute->newInstance();
+                if(!($attribute instanceof BaseAttribute)) {
+                    continue;
+                }
+                if (class_exists($attribute->isHandledBy())) {
+                    /** @var AttributeHandlerInterface $handler */
+                    $handler = $attribute->isHandledBy();
+                    $handler = new $handler();
+                    $handler->handle($attribute, $reflectionFrom, $property, $to, $from);
+                    continue 2;
                 }
-                continue;
             }
 
             //do default
@@ -49,6 +49,7 @@ public function transform(object $from, string $to): object
      * @param \ReflectionProperty $property
      * @param object $to
      * @param object $from
+     * @param string $propertyName
      *
      * @return void
      */

tmp.php

@@ -0,0 +1,25 @@
+<?php
+require 'vendor/autoload.php';
+
+class User {
+    public function __construct(
+        private string $email,
+        private array $comments) {
+    }
+}
+
+class UserDTO {
+    public function __construct(
+        private string $email,
+        #[\Tibisoft\AutoTransformer\Attribute\Count]
+        private int $comments) {
+    }
+}
+
+$user = new User('[email protected]', ['Comment #1', 'Comment #2', 'Comment #3', 'Comment #4']);
+
+$transformer = new \Tibisoft\AutoTransformer\AutoTransformer();
+$userDTO = $transformer->transform($user, UserDTO::class);
+
+var_dump($userDTO);
+exit;