JsonView.php

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<?php
namespace TYPO3\CMS\Install\View;

/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */

use TYPO3\CMS\Extbase\Mvc\View\AbstractView;
use TYPO3\CMS\Install\Status\Exception as StatusException;
use TYPO3\CMS\Install\Status\StatusInterface;

class JsonView extends AbstractView
{
    public function render()
    {
        $renderedData = $this->variables;
        if (isset($renderedData['status']) && is_array($renderedData['status'])) {
            try {
                $renderedData['status'] = $this->transformStatusMessagesToArray($renderedData['status']);
            } catch (StatusException $e) {
                $renderedData['status'] = [[
                    'severity' => 'error',
                    'title' => htmlspecialchars($e->getMessage())
                ]];
            }
        }

        return $renderedData;
    }

    protected function transformStatusMessagesToArray(array $statusArray = [])
    {
        $result = [];
        foreach ($statusArray as $status) {
            if (!$status instanceof StatusInterface) {
                throw new StatusException(
                    'Object must implement StatusInterface',
                    1381059600
                );
            }
            $result[] = $this->transformStatusToArray($status);
        }
        return $result;
    }

    public function transformStatusToArray(StatusInterface $status)
    {
        $arrayStatus = [];
        $arrayStatus['severity'] = $this->getSeverityAsNumber($status->getSeverity());
        $arrayStatus['title'] = htmlspecialchars($status->getTitle());
        $arrayStatus['message'] = htmlspecialchars($status->getMessage());
        return $arrayStatus;
    }

    protected function getSeverityAsNumber($severity)
    {
        $number = -2;
        switch (strtolower($severity)) {
            case 'loading':
                $number = -3;
                break;
            case 'notice':
                $number = -2;
                break;
            case 'info':
                $number = -1;
                break;
            case 'ok':
            case 'success':
                $number = 0;
                break;
            case 'warning':
                $number = 1;
                break;
            case 'error':
            case 'danger':
            case 'fatal':
                $number = 2;
                break;
        }
        return $number;
    }
}