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<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
namespace Magento\Framework\View\Layout\Argument\Interpreter;
use Magento\Framework\Data\Argument\InterpreterInterface;
use Magento\Framework\ObjectManagerInterface;
/**
* Interpreter that returns invocation result of a helper method
*/
class HelperMethod implements InterpreterInterface
{
/**
* @var ObjectManagerInterface
*/
private $objectManager;
/**
* @var NamedParams
*/
private $paramsInterpreter;
/**
* @param ObjectManagerInterface $objectManager
* @param NamedParams $paramsInterpreter
*/
public function __construct(ObjectManagerInterface $objectManager, NamedParams $paramsInterpreter)
{
$this->objectManager = $objectManager;
$this->paramsInterpreter = $paramsInterpreter;
}
/**
* {@inheritdoc}
* @throws \InvalidArgumentException
*/
public function evaluate(array $data)
{
if (!isset($data['helper']) || substr_count($data['helper'], '::') != 1) {
throw new \InvalidArgumentException('Helper method name in format "\Class\Name::methodName" is expected.');
}
$helperMethod = $data['helper'];
list($helperClass, $methodName) = explode('::', $helperMethod, 2);
if (!method_exists($helperClass, $methodName)) {
throw new \InvalidArgumentException("Helper method '{$helperMethod}' does not exist.");
}
$methodParams = $this->paramsInterpreter->evaluate($data);
$methodParams = array_values($methodParams);
// Use positional argument binding instead of named binding
$helperInstance = $this->objectManager->get($helperClass);
return call_user_func_array([$helperInstance, $methodName], $methodParams);
}
}