BackendWarnings.php

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<?php
namespace TYPO3\CMS\Rsaauth;

class BackendWarnings {

    public function displayWarningMessages_postProcess(array &$warnings) {
        $backend = \TYPO3\CMS\Rsaauth\Backend\BackendFactory::getBackend();
        if ($backend instanceof \TYPO3\CMS\Rsaauth\Backend\CommandLineBackend) {
            // Not using the PHP extension!
            $warnings['rsaauth_cmdline'] = $GLOBALS['LANG']->sL('LLL:EXT:rsaauth/hooks/locallang.xlf:hook_using_cmdline');
            // Check the path
            $extconf = unserialize($GLOBALS['TYPO3_CONF_VARS']['EXT']['extConf']['rsaauth']);
            $path = trim($extconf['temporaryDirectory']);
            if ($path == '') {
                // Path is empty
                $warnings['rsaauth'] = $GLOBALS['LANG']->sL('LLL:EXT:rsaauth/hooks/locallang.xlf:hook_empty_directory');
            } elseif (!\TYPO3\CMS\Core\Utility\GeneralUtility::isAbsPath($path)) {
                // Path is not absolute
                $warnings['rsaauth'] = $GLOBALS['LANG']->sL('LLL:EXT:rsaauth/hooks/locallang.xlf:hook_directory_not_absolute');
            } elseif (!@is_dir($path)) {
                // Path does not represent a directory
                $warnings['rsaauth'] = $GLOBALS['LANG']->sL('LLL:EXT:rsaauth/hooks/locallang.xlf:hook_directory_not_exist');
            } elseif (!@is_writable($path)) {
                // Directory is not writable
                $warnings['rsaauth'] = $GLOBALS['LANG']->sL('LLL:EXT:rsaauth/hooks/locallang.xlf:hook_directory_not_writable');
            } elseif (substr($path, 0, strlen(PATH_site)) == PATH_site) {
                // Directory is inside the site root
                $warnings['rsaauth'] = $GLOBALS['LANG']->sL('LLL:EXT:rsaauth/hooks/locallang.xlf:hook_directory_inside_siteroot');
            }
        }
    }

}