[BUGFIX] Using XML as override files.

Typo3 can read XML override non-default translations.

Classes/Service/FileOverrideService.php

@@ -30,7 +30,7 @@ use SGalinski\Lfeditor\Exceptions\LFException;
 use SGalinski\Lfeditor\Utility\SgLib;
 use SGalinski\Lfeditor\Utility\Typo3Lib;
 
-class FileOverrideService extends FileBaseXLFService {
+class FileOverrideService extends FileBaseXMLService {
 	/**
 	 * Object which represents original (overridden) language file.
 	 *
@@ -57,7 +57,7 @@ class FileOverrideService extends FileBaseXLFService {
 
 		if (!is_file($overrideFileAbsolutePath)) {
 			$extRelativeFilePath = SgLib::trimPath('EXT:', $typo3ExtRelativeFilePath);
-			$extRelativeFilePath = substr($extRelativeFilePath, 0, strrpos($extRelativeFilePath, '.')) . '.xlf';
+			$extRelativeFilePath = substr($extRelativeFilePath, 0, strrpos($extRelativeFilePath, '.')) . '.xml';
 
 			/** @var ConfigurationService $configurationService */
 			$configurationService = $this->objectManager->get('SGalinski\Lfeditor\Service\ConfigurationService');
@@ -77,7 +77,7 @@ class FileOverrideService extends FileBaseXLFService {
 	 */
 	public function readFile() {
 		if (is_file($this->absFile)) {
-			$this->readXlfFile();
+			parent::readFile();
 			if (!Typo3Lib::isTypo3BackendInUtf8Mode()) {
 				$this->localLang = Typo3Lib::utf8($this->localLang, FALSE, ['default']);
 			}
@@ -143,14 +143,12 @@ class FileOverrideService extends FileBaseXLFService {
 		}
 
 		parent::writeFile();
-		// TODO: Delete override file and additional configuration line if there is no content in file?
+
 		// Set only new values in GlobalConfiguration if something changed
 		$typo3ExtRelativeFilePath = Typo3Lib::transTypo3File($this->originalFileObject->getAbsFile(), FALSE);
 		$relativeOverrideFilePath = SgLib::trimPath(PATH_site, $this->absFile);
-		//TODO: this can support more than 1 override files?
-		if ($GLOBALS['TYPO3_CONF_VARS']['SYS']['locallangXMLOverride'][$typo3ExtRelativeFilePath][0]
-			=== $relativeOverrideFilePath
-		) {
+		$locallangXMLOverride = &$GLOBALS['TYPO3_CONF_VARS']['SYS']['locallangXMLOverride'];
+		if ($locallangXMLOverride[$typo3ExtRelativeFilePath][0] === $relativeOverrideFilePath) {
 			return;
 		}