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<?php
/**
 * @license http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 * @author Hervé Guétin <[email protected]> <@herveguetin>
 * @copyright Copyright (c) 2017 Agence Soon (http://www.agence-soon.fr)
 */

namespace Soon\CsBlock\Block;

use Magento\Cms\Model\Template\FilterProvider;
use Magento\Email\Model\Template\Filter;
use Magento\Framework\View\Element\Template;
use Soon\CsBlock\Model\Block;
use Soon\CsBlock\Model\BlockInterface;

class ContentBlock extends Template
{
    /**
     * @var Block
     */
    private $block;
    /**
     * @var FilterProvider
     */
    private $filterProvider;
    /**
     * @var Template
     */
    private $renderer;

    public function __construct(
        Template\Context $context,
        BlockInterface $block,
        FilterProvider $filterProvider,
        $blockId,
        array $data = []
    )
    {
        parent::__construct($context, $data);

        /** @var Block $block */
        $block->getResource()->load($block, $blockId);
        $this->block = $block;
        $this->filterProvider = $filterProvider;
    }

    /**
     * @return string
     */
    protected function _toHtml()
    {
        if (!$this->block->hasData()) {
            return '';
        }

        $this->prepareRenderer();

        return $this->renderer->toHtml();
    }

    private function prepareRenderer()
    {
        $rendererClassName = $this->block->getRendererClassName();
        $rendererTemplate = $this->block->getRendererTemplate();

        /** @var Template $renderer */
        $renderer = $this->getLayout()->createBlock($rendererClassName);
        $renderer->setTemplate($rendererTemplate);
        $renderer->setData($this->prepareRendererData());

        $this->renderer = $renderer;
    }

    /**
     * @return array
     */
    private function prepareRendererData(): array
    {
        $rendererData = [];
        array_map(function ($v, $k) use (&$rendererData) {
            $rendererDataItem = $this->prepareRendererDataItem($k, $v);
            if (!empty($rendererDataItem)) {
                $rendererData[$rendererDataItem[0]] = $rendererDataItem[1];
            }
        }, $this->block->getContent(), array_keys($this->block->getContent()));

        return array_merge(['block_id' => $this->block->getData('block_id')], $rendererData);
    }

    /**
     * @param string $k
     * @param mixed $v
     * @return array
     */
    private function prepareRendererDataItem($k, $v)
    {
        $keyGlue = sprintf('soon_csblock__%s__', $this->block->getType());
        if (strpos($k, $keyGlue) !== false) {
            return [str_replace($keyGlue, '', $k), $this->parseDirectives($v)];
        }

        return [];
    }

    /**
     * @param mixed $v
     * @return mixed
     */
    private function parseDirectives($v)
    {
        if (!is_string($v)) {
            return $v;
        }

        $storeId = $this->_storeManager->getStore()->getId();
        /** @var Filter $filter */
        $filter = $this->filterProvider->getBlockFilter();

        return $filter->setStoreId($storeId)->filter($v);
    }
}