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<?php
/**
 * Copyright (c) 2020 Kaliop Digital Commerce (https://digitalcommerce.kaliop.com) All Rights Reserved.
 * https://opensource.org/licenses/OSL-3.0  Open Software License (OSL 3.0)
 *
 * Hugo Herblot <[email protected]> <[email protected]>
 */

namespace Soon\Faq\Block\Question;

use Magento\Framework\View\Element\Text;
use Magento\Framework\View\Element\Context;
use Magento\Framework\Serialize\Serializer\Json;

class Richsnippets extends Text
{
    /**
     * @var Json
     */
    private $json;
    /**
     * @param array
     */

    private $richSnippet;
    /**
     * @var ListQuestion
     */
    private $listQuestion;

    /**
     * Richsnippets constructor.
     * @param Context $context
     * @param Json $json
     * @param ListQuestion $listQuestion
     * @param array $data
     */
    public function __construct(
        Context $context,
        Json $json,
        ListQuestion $listQuestion,
        array $data = []
    ) {
        parent::__construct($context, $data);

        $this->json = $json;
        $this->listQuestion = $listQuestion;
    }

    /**
     * Retrieve snipet params
     *
     * @return array
     */
    public function getRichSnippetData()
    {
        $listQuestions = $this->listQuestion->getCategoriesWithQuestions();

        if ($listQuestions) {
            $mainEntity = [];

            foreach ($listQuestions as $listQuestion) {
                foreach ($listQuestion->getData('category_questions') as $question) {
                    $mainEntity[] = [
                        "@type" => "Question",
                        'name' => $this->stripTags($question->getData('question')),
                        'acceptedAnswer' => [
                            "@type" => "Answer",
                            "text" => $this->stripTags($this->listQuestion->getAnswerForQuestion($question))
                        ]
                    ];
                }
            }

            $this->richSnippet = [
                '@context' => 'http://schema.org',
                "@type" => "FAQPage",
                'mainEntity' => $mainEntity
            ];
        }

        return $this->richSnippet;
    }

    /**
     * Render html output
     *
     * @return string
     */
    protected function _toHtml()
    {
        if ($richSnippetData = $this->getRichSnippetData()) {
            $data = '<script type="application/ld+json">'
                . $this->json->serialize($richSnippetData)
                . '</script>';

            $this->setText($data);
        }

        return parent::_toHtml();
    }
}