[TASK] Minor code improvements

Classes/Service/RegisterService.php

@@ -49,7 +49,7 @@ class RegisterService implements \TYPO3\CMS\Core\SingletonInterface {
 	private $registerArray = [];
 
 	/**
-	 * Get all registered templates from the cache
+	 * Get all registered templates from the cache. if the cache expired, the entries are generated
 	 *
 	 * @return array
 	 * @throws \TYPO3\CMS\Core\Cache\Exception\NoSuchCacheException
@@ -107,7 +107,6 @@ class RegisterService implements \TYPO3\CMS\Core\SingletonInterface {
 		}
 
 		// read automatically created extension registrations and write the entries
-		// get the location where automatic registrations should be stored
 		$configurationLocation = $this->getRegistrationPath();
 		$registerFolder = GeneralUtility::getFileAbsFileName(
 			$configurationLocation
@@ -176,7 +175,7 @@ class RegisterService implements \TYPO3\CMS\Core\SingletonInterface {
 			$templateDirectoryParts = GeneralUtility::trimExplode('_', $templateKey);
 			$templateDirectory = '';
 			foreach ($templateDirectoryParts as $part) {
-				$templateDirectory .= ucfirst($part);
+				$templateDirectory .= \ucfirst($part);
 			}
 		}
 
@@ -214,7 +213,7 @@ class RegisterService implements \TYPO3\CMS\Core\SingletonInterface {
 		$tsSettings = $typoScriptSettingsService->getSettings(0, 'tx_sgmail');
 
 		// get the location where automatic registrations should be stored
-		return 'EXT:' . $tsSettings['mail']['configurationLocation'] . '/' . RegisterService::CONFIG_PATH;
+		return 'EXT:' . $tsSettings['mail']['configurationLocation'] . '/' . self::CONFIG_PATH;
 	}
 
 	/**
@@ -227,7 +226,7 @@ class RegisterService implements \TYPO3\CMS\Core\SingletonInterface {
 		$cacheManager = $objectManager->get(CacheManager::class);
 
 		/** @var FrontendInterface $cache */
-		$cache = $cacheManager->getCache(RegisterService::CACHE_NAME);
+		$cache = $cacheManager->getCache(self::CACHE_NAME);
 		/** @var FrontendInterface $cache */
 		$cache->flush();
 	}