Support for SmartObject magic properties

Author: ondrejmirtes

composer.json

@@ -6,8 +6,8 @@
 	"prefer-stable": true,
 	"require": {
 		"php": "~7.0",
-		"phpstan/phpstan": "dev-dev#3ba62cbb49",
-		"nette/utils": "~2.3.0"
+		"phpstan/phpstan": "dev-dev#f85ba19e37",
+		"nette/utils": "^2.3.0"
 	},
 	"autoload": {
 		"psr-4": {

src/Reflection/Nette/SmartObjectPropertiesClassReflectionExtension.php

@@ -0,0 +1,65 @@
+<?php declare(strict_types=1);
+
+namespace PHPStan\Reflection\Nette;
+
+use PHPStan\Reflection\ClassReflection;
+use PHPStan\Reflection\NetteObject\NetteObjectPropertyReflection;
+use PHPStan\Reflection\PropertiesClassReflectionExtension;
+use PHPStan\Reflection\PropertyReflection;
+
+class SmartObjectPropertiesClassReflectionExtension implements PropertiesClassReflectionExtension
+{
+
+	public function hasProperty(ClassReflection $classReflection, string $propertyName): bool
+	{
+		$traitNames = $this->getTraitNames($classReflection->getNativeReflection());
+		if (!in_array(\Nette\SmartObject::class, $traitNames, true)) {
+			return false;
+		}
+
+		$property = \Nette\Utils\ObjectMixin::getMagicProperty($classReflection->getName(), $propertyName);
+		if ($property === null) {
+			return false;
+		}
+
+		$getterMethod = $this->getMethodByProperty($classReflection, $propertyName);
+		if ($getterMethod === null) {
+			return false;
+		}
+
+		return $getterMethod->isPublic();
+	}
+
+	private function getTraitNames(\ReflectionClass $class): array
+	{
+		$traitNames = $class->getTraitNames();
+		while ($class->getParentClass() !== false) {
+			$traitNames = array_values(array_unique(array_merge($traitNames, $class->getParentClass()->getTraitNames())));
+			$class = $class->getParentClass();
+		}
+
+		return $traitNames;
+	}
+
+	/**
+	 * @param \PHPStan\Reflection\ClassReflection $classReflection
+	 * @param string $propertyName
+	 * @return \PHPStan\Reflection\MethodReflection|null
+	 */
+	private function getMethodByProperty(ClassReflection $classReflection, string $propertyName)
+	{
+		$getterMethodName = sprintf('get%s', ucfirst($propertyName));
+		if (!$classReflection->hasMethod($getterMethodName)) {
+			return null;
+		}
+
+		return $classReflection->getMethod($getterMethodName);
+	}
+
+	public function getProperty(ClassReflection $classReflection, string $propertyName): PropertyReflection
+	{
+		$getterMethod = $this->getMethodByProperty($classReflection, $propertyName);
+		return new NetteObjectPropertyReflection($classReflection, $getterMethod->getReturnType());
+	}
+
+}