<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
namespace Magento\Framework\View;

use Magento\Framework\ObjectManagerInterface;

/**
* Factory class for Template Engine
*/
class TemplateEngineFactory
{
/**
* Object manager
*
* @var ObjectManagerInterface
*/
protected $objectManager;

/**
* Engines
*
* @var array
*/
protected $engines;

/**
* Constructor
*
* @param ObjectManagerInterface $objectManager
* @param array $engines Format: array('<name>' => 'TemplateEngine\Class', ...)
*/
public function __construct(ObjectManagerInterface $objectManager, array $engines)
{
$this->objectManager = $objectManager;
$this->engines = $engines;
}

/**
* Retrieve a template engine instance by its unique name
*
* @param string $name
* @return TemplateEngineInterface
* @throws \UnexpectedValueException If template engine doesn't implement the necessary interface
* @throws \InvalidArgumentException If template engine doesn't exist
*/
public function create($name)
{
if (!isset($this->engines[$name])) {
throw new \InvalidArgumentException("Unknown template engine type: '{$name}'.");
}
$engineClass = $this->engines[$name];
$engineInstance = $this->objectManager->create($engineClass);
if (!$engineInstance instanceof \Magento\Framework\View\TemplateEngineInterface) {
throw new \UnexpectedValueException("{$engineClass} has to implement the template engine interface.");
}
return $engineInstance;
}
}