added support for persistent parameters with property typehints in PHP 7.4 [Closes #230]

Author: dg

src/Application/UI/Component.php

@@ -135,13 +135,12 @@ public function loadState(array $params): void
 		$reflection = $this->getReflection();
 		foreach ($reflection->getPersistentParams() as $name => $meta) {
 			if (isset($params[$name])) { // nulls are ignored
-				$type = gettype($meta['def']);
-				if (!$reflection->convertType($params[$name], $type)) {
+				if (!$reflection->convertType($params[$name], $meta['type'])) {
 					throw new Nette\Application\BadRequestException(sprintf(
 						"Value passed to persistent parameter '%s' in %s must be %s, %s given.",
 						$name,
 						$this instanceof Presenter ? 'presenter ' . $this->getName() : "component '{$this->getUniqueId()}'",
-						$type === 'NULL' ? 'scalar' : $type,
+						$meta['type'] === 'NULL' ? 'scalar' : $meta['type'],
 						is_object($params[$name]) ? get_class($params[$name]) : gettype($params[$name])
 					));
 				}

src/Application/UI/ComponentReflection.php

@@ -52,6 +52,7 @@ public function getPersistentParams(string $class = null): array
 				if (!$rp->isStatic() && self::parseAnnotation($rp, 'persistent')) {
 					$params[$name] = [
 						'def' => $default,
+						'type' => Nette\Utils\Reflection::getPropertyType($rp) ?: gettype($default),
 						'since' => $isPresenter ? Nette\Utils\Reflection::getPropertyDeclaringClass($rp)->getName() : null,
 					];
 				}
@@ -111,13 +112,12 @@ public function saveState(Component $component, array &$params): void
 				$params[$name] = $component->$name; // object property value
 			}
 
-			$type = gettype($meta['def']);
-			if (!self::convertType($params[$name], $type)) {
+			if (!self::convertType($params[$name], $meta['type'])) {
 				throw new InvalidLinkException(sprintf(
 					"Value passed to persistent parameter '%s' in %s must be %s, %s given.",
 					$name,
 					$component instanceof Presenter ? 'presenter ' . $component->getName() : "component '{$component->getUniqueId()}'",
-					$type === 'NULL' ? 'scalar' : $type,
+					$meta['type'] === 'NULL' ? 'scalar' : $meta['type'],
 					is_object($params[$name]) ? get_class($params[$name]) : gettype($params[$name])
 				));
 			}