Romm\Formz\Service\CacheService

Complexity

Total Complexity

13

Size/Duplication

Total Lines	120
Duplicated Lines	0 %

Coupling/Cohesion

Components	2
Dependencies	4

Importance

Changes

0

6 Methods

Rating	Name	Duplication	Size	Complexity
A	clearCacheCommand()	0	16	4
A	getBackendCache()	0	15	3
A	getCacheInstance()	0	13	3
A	setCacheInstance()	0	4	1
A	getCacheIdentifier()	0	13	1
A	injectTypoScriptService()	0	4	1

<?php
/*
 * 2017 Romain CANON <romain.hydrocanon@gmail.com>
 *
 * This file is part of the TYPO3 Formz project.
 * It is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License, either
 * version 3 of the License, or any later version.
 *
 * For the full copyright and license information, see:
 * http://www.gnu.org/licenses/gpl-3.0.html
 */

namespace Romm\Formz\Service;

use Romm\Formz\Core\Core;
use Romm\Formz\Service\Traits\ExtendedFacadeInstanceTrait;
use TYPO3\CMS\Core\Cache\Backend\AbstractBackend;
use TYPO3\CMS\Core\Cache\CacheManager;
use TYPO3\CMS\Core\Cache\Frontend\FrontendInterface;
use TYPO3\CMS\Core\SingletonInterface;
use TYPO3\CMS\Core\Utility\GeneralUtility;

class CacheService implements SingletonInterface
{
    use ExtendedFacadeInstanceTrait;

    const CACHE_IDENTIFIER = 'cache_formz';
    const GENERATED_FILES_PATH = 'typo3temp/Formz/';

    /**
     * @var TypoScriptService
     */
    protected $typoScriptService;

    /**
     * @var FrontendInterface
     */
    protected $cacheInstance;

    /**
     * Returns the type of backend cache defined in TypoScript at the path:
     * `settings.defaultBackendCache`.
     *
     * @return string
     * @throws \Exception
     */
    public function getBackendCache()
    {
        $backendCache = $this->typoScriptService->getExtensionConfigurationFromPath('settings.defaultBackendCache');

        if (false === class_exists($backendCache)
            && false === in_array(AbstractBackend::class, class_parents($backendCache))
        ) {
            throw new \Exception(
                'The cache class name given in configuration "config.tx_formz.settings.defaultBackendCache" must inherit "' . AbstractBackend::class . '" (current value: "' . (string)$backendCache . '")',
                1459251263
            );
        }

        return $backendCache;
    }

    /**
     * Returns the cache instance for this extension.
     *
     * @return FrontendInterface
     */
    public function getCacheInstance()
    {
        if (null === $this->cacheInstance) {
            /** @var $cacheManager CacheManager */
            $cacheManager = Core::instantiate(CacheManager::class);

            if ($cacheManager->hasCache(self::CACHE_IDENTIFIER)) {
                $this->cacheInstance = $cacheManager->getCache(self::CACHE_IDENTIFIER);
            }
        }

        return $this->cacheInstance;
    }

    /**
     * @param FrontendInterface $cacheInstance
     */
    public function setCacheInstance(FrontendInterface $cacheInstance)
    {
        $this->cacheInstance = $cacheInstance;
    }

    /**
     * Generic cache identifier creation for usages in the extension.
     *
     * @param string $string
     * @param string $formClassName
     * @param int    $maxLength
     * @return string
     */
    public function getCacheIdentifier($string, $formClassName, $maxLength = 55)
    {
        $explodedClassName = explode('\\', $formClassName);

        $identifier = strtolower(
            $string .
            end($explodedClassName) .
            '-' .
            sha1($formClassName)
        );

        return substr($identifier, 0, $maxLength);
    }

    /**
     * @param TypoScriptService $typoScriptService
     */
    public function injectTypoScriptService(TypoScriptService $typoScriptService)
    {
        $this->typoScriptService = $typoScriptService;
    }

    /**
     * Function called when clearing TYPO3 caches. It will remove the temporary
     * asset files created by Formz.
     *
     * @param array $parameters
     */
    public function clearCacheCommand($parameters)
    {
        if (false === in_array($parameters['cacheCmd'], ['all', 'system'])) {
            return;
        }

        $files = glob(GeneralUtility::getFileAbsFileName(self::GENERATED_FILES_PATH . '*'));

        if (false === $files) {
            return;
        }

        foreach ($files as $assetCacheFile) {
            unlink($assetCacheFile);
        }
    }
}