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<?php
/**
 * @copyright Copyright (c) 2015 Fooman Limited (http://www.fooman.co.nz)
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Fooman\PdfCore\Model;

use Magento\Email\Model\Template\Config;
use Magento\Email\Model\Template\FilterFactory;
use Magento\Email\Model\TemplateFactory;
use Magento\Framework\App\Config\ScopeConfigInterface;
use Magento\Framework\App\RequestInterface;
use Magento\Framework\Filesystem;
use Magento\Framework\Filter\FilterManager;
use Magento\Framework\Model\Context;
use Magento\Framework\Registry;
use Magento\Framework\UrlInterface;
use Magento\Framework\View\Asset\Repository;
use Magento\Framework\View\DesignInterface;
use Magento\Framework\View\LayoutFactory;
use Magento\Store\Model\App\Emulation;
use Magento\Store\Model\StoreManagerInterface;

class Template extends \Magento\Email\Model\Template
{
    /**
     * @var RequestInterface
     */
    protected $request;

    /**
     * @var LayoutFactory
     */
    protected $layoutFactory;

    /**
     * @var \Magento\Framework\App\State
     */
    protected $appState;

    public function __construct(
        Context $context,
        DesignInterface $design,
        Registry $registry,
        Emulation $appEmulation,
        StoreManagerInterface $storeManager,
        Repository $assetRepo,
        Filesystem $filesystem,
        ScopeConfigInterface $scopeConfig,
        Config $emailConfig,
        TemplateFactory $templateFactory,
        FilterManager $filterManager,
        UrlInterface $urlModel,
        FilterFactory $filterFactory,
        RequestInterface $request,
        LayoutFactory $layoutFactory,
        array $data = []
    ) {
        $this->request = $request;
        $this->layoutFactory = $layoutFactory;
        $this->appState = $context->getAppState();
        parent::__construct(
            $context,
            $design,
            $registry,
            $appEmulation,
            $storeManager,
            $assetRepo,
            $filesystem,
            $scopeConfig,
            $emailConfig,
            $templateFactory,
            $filterManager,
            $urlModel,
            $filterFactory,
            $data
        );
    }

    public function processTemplate()
    {
        $this->forceLocaleInAdmin();

        $isDesignApplied = $this->applyDesignConfig();
        $this->setIsLegacy(true);
        $html = $this->getProcessedTemplate($this->_getVars());

        if ($isDesignApplied) {
            $this->cancelDesignConfig();
        }
        return $html;
    }

    public function processLayout($layoutHandle)
    {
        $this->forceLocaleInAdmin();
        $isDesignApplied = $this->applyDesignConfig();

        if ($this->appState->getAreaCode() !== \Magento\Framework\App\Area::AREA_FRONTEND) {
            $html = $this->appState->emulateAreaCode(
                \Magento\Framework\App\Area::AREA_FRONTEND,
                [$this, 'getProcessedLayout'],
                ['layoutHandle' => $layoutHandle, 'variables' => $this->_getVars()]
            );
        } else {
            $html = $this->getProcessedLayout($layoutHandle, $this->_getVars());
        }

        if ($isDesignApplied) {
            $this->cancelDesignConfig();
        }
        return $html;
    }

    public function getProcessedLayout($layoutHandle, $variables = [])
    {
        $layout = $this->layoutFactory->create(['cacheable' => false]);
        $layout->getUpdate()->load([$layoutHandle]);

        $layout->generateXml();
        $layout->generateElements();
        $rootBlock = false;
        foreach ($layout->getAllBlocks() as $block) {
            if (!$block->getParentBlock() && !$rootBlock) {
                $rootBlock = true;
                $layout->addOutputElement($block->getNameInLayout());
            }
            foreach ($variables as $variable => $value) {
                $block->setData($variable, $value);
            }
        }

        $output = $layout->getOutput();
        $layout->__destruct();
        return $output;
    }

    private function forceLocaleInAdmin()
    {
        $storeId = $this->getDesignConfig()->getStore();
        $locale = $this->scopeConfig->getValue(
            \Magento\Directory\Helper\Data::XML_PATH_DEFAULT_LOCALE,
            \Magento\Store\Model\ScopeInterface::SCOPE_STORE,
            $storeId
        );
        $params = $this->request->getParams();
        $params['locale'] = $locale;
        $this->request->setParams($params);
    }
}