ConfigurationUtility.php

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<?php
namespace TYPO3\CMS\Extensionmanager\Utility;

class ConfigurationUtility implements \TYPO3\CMS\Core\SingletonInterface {

    protected $objectManager;

    public function saveDefaultConfiguration($extensionKey) {
        $currentConfiguration = $this->getCurrentConfiguration($extensionKey);
        $nestedConfiguration = $this->convertValuedToNestedConfiguration($currentConfiguration);
        $this->writeConfiguration($nestedConfiguration, $extensionKey);
    }

    public function writeConfiguration(array $configuration = array(), $extensionKey) {
        $configurationManager = $this->objectManager->get('TYPO3\\CMS\\Core\\Configuration\\ConfigurationManager');
        $configurationManager->setLocalConfigurationValueByPath('EXT/extConf/' . $extensionKey, serialize($configuration));
        \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('TYPO3\\CMS\\Core\\Cache\\CacheManager')->flushCachesInGroup('system');
    }

    public function getCurrentConfiguration($extensionKey) {
        $mergedConfiguration = $this->getDefaultConfigurationFromExtConfTemplateAsValuedArray($extensionKey);
        $currentExtensionConfig = unserialize($GLOBALS['TYPO3_CONF_VARS']['EXT']['extConf'][$extensionKey]);
        $currentExtensionConfig = is_array($currentExtensionConfig) ? $currentExtensionConfig : array();
        $currentExtensionConfig = $this->convertNestedToValuedConfiguration($currentExtensionConfig);
        \TYPO3\CMS\Core\Utility\ArrayUtility::mergeRecursiveWithOverrule(
            $mergedConfiguration,
            $currentExtensionConfig
        );
        return $mergedConfiguration;
    }

    public function getDefaultConfigurationFromExtConfTemplateAsValuedArray($extensionKey) {
        $rawConfigurationString = $this->getDefaultConfigurationRawString($extensionKey);

        $theConstants = array();

        if (strlen($rawConfigurationString) > 0) {
            $extensionPathInformation = $this->getExtensionPathInformation($extensionKey);

            $tsStyleConfig = $this->objectManager->get('TYPO3\\CMS\\Core\\TypoScript\\ConfigurationForm');
            $tsStyleConfig->doNotSortCategoriesBeforeMakingForm = TRUE;

            $theConstants = $tsStyleConfig->ext_initTSstyleConfig(
                $rawConfigurationString,
                $extensionPathInformation['siteRelPath'],
                PATH_site . $extensionPathInformation['siteRelPath'],
                $GLOBALS['BACK_PATH']
            );

            // Loop through configuration items, see if it is assigned to a sub category
            // and add the sub category label to the item property if so.
            foreach ($theConstants as $configurationOptionName => $configurationOption) {
                if (
                    array_key_exists('subcat_name', $configurationOption)
                    && isset($tsStyleConfig->subCategories[$configurationOption['subcat_name']])
                    && isset($tsStyleConfig->subCategories[$configurationOption['subcat_name']][0])
                ) {
                    $theConstants[$configurationOptionName]['subcat_label'] = $tsStyleConfig->subCategories[$configurationOption['subcat_name']][0];
                }
            }

            // Set up the additional descriptions
            if (isset($tsStyleConfig->setup['constants']['TSConstantEditor.'])) {
                foreach ($tsStyleConfig->setup['constants']['TSConstantEditor.'] as $category => $highlights) {
                    $theConstants['__meta__'][rtrim($category, '.')]['highlightText'] = $highlights['description'];
                    foreach ($highlights as $highlightNumber => $value) {
                        if (rtrim($category, '.') == $theConstants[$value]['cat']) {
                            $theConstants[$value]['highlight'] = $highlightNumber;
                        }
                    }
                }
            }
        }

        return $theConstants;
    }

    protected function getExtensionPathInformation($extensionKey) {
        return $GLOBALS['TYPO3_LOADED_EXT'][$extensionKey];
    }

    protected function getDefaultConfigurationRawString($extensionKey) {
        $rawString = '';
        $extConfTemplateFileLocation = \TYPO3\CMS\Core\Utility\GeneralUtility::getFileAbsFileName(
            'EXT:' . $extensionKey . '/ext_conf_template.txt',
            FALSE
        );
        if (file_exists($extConfTemplateFileLocation)) {
            $rawString = file_get_contents($extConfTemplateFileLocation);
        }
        return $rawString;
    }

    public function convertValuedToNestedConfiguration(array $valuedConfiguration) {
        $nestedConfiguration = array();
        foreach ($valuedConfiguration as $name => $section) {
            $path = str_replace('.', './', $name);
            $nestedConfiguration = \TYPO3\CMS\Core\Utility\ArrayUtility::setValueByPath($nestedConfiguration, $path, $section['value'], '/');
        }
        return $nestedConfiguration;
    }

    public function convertNestedToValuedConfiguration(array $nestedConfiguration) {
        $flatExtensionConfig = \TYPO3\CMS\Core\Utility\ArrayUtility::flatten($nestedConfiguration);
        $valuedCurrentExtensionConfig = array();
        foreach ($flatExtensionConfig as $key => $value) {
            $valuedCurrentExtensionConfig[$key]['value'] = $value;
        }
        return $valuedCurrentExtensionConfig;
    }
}