[TASK] Finish update wizard

Classes/Updates/UpdateLanguages.php

@@ -51,6 +51,19 @@ class UpdateLanguages extends AbstractUpdate {
 		'tx_sgmail_domain_model_mail', 'tx_sgmail_domain_model_template'
 	];
 
+	/**
+	 * is used to map language codes. If empty the updatewizard will ignore this update
+	 * example: you want to change en-us to en
+	 * [
+	 *    'en-us' => 'en'
+	 * ]
+	 *
+	 * @var array
+	 */
+	protected $languageMap = [
+
+	];
+
 	/**
 	 * Checks whether updates are required.
 	 *
@@ -61,25 +74,27 @@ class UpdateLanguages extends AbstractUpdate {
 	public function checkForUpdate(&$description) {
 		$upgradeNecessary = FALSE;
 
-		$languages = BackendService::getLanguages();
-		$where = 'language NOT IN (';
-		foreach ($languages as $language) {
-			$where .= '"' . $language['isocode'] . '",';
-		}
-		$where = rtrim($where, ',');
-		$where .= ')';
+		if (count($this->languageMap) > 0) {
+			$languages = BackendService::getLanguages();
+			$where = 'language NOT IN (';
+			foreach ($languages as $language) {
+				$where .= '"' . $language['isocode'] . '",';
+			}
+			$where = rtrim($where, ',');
+			$where .= ')';
 
-		$description = 'Check all the language codes in the database';
+			$description = 'Check all the language codes in the database';
 
-		/** @var DatabaseConnection $databaseConnection */
-		$databaseConnection = $this->getDatabaseConnection();
+			/** @var DatabaseConnection $databaseConnection */
+			$databaseConnection = $this->getDatabaseConnection();
 
-		foreach ($this->tables as $table) {
-			/** @var \mysqli_result $result */
-			$result = $databaseConnection->exec_SELECTquery('distinct language', $table, $where);
-			if ($result->num_rows > 0) {
-				$upgradeNecessary = TRUE;
-				break;
+			foreach ($this->tables as $table) {
+				/** @var \mysqli_result $result */
+				$result = $databaseConnection->exec_SELECTquery('distinct language', $table, $where);
+				if ($result->num_rows > 0) {
+					$upgradeNecessary = TRUE;
+					break;
+				}
 			}
 		}
 
@@ -94,11 +109,19 @@ class UpdateLanguages extends AbstractUpdate {
 	 * @return bool Whether everything went smoothly or not
 	 */
 	public function performUpdate(array &$dbQueries, &$customMessages) {
+		$dbQueries = [];
+
 		/** @var DatabaseConnection $databaseConnection */
 		$databaseConnection = $this->getDatabaseConnection();
 
 		foreach ($this->tables as $table) {
-
+			foreach ($this->languageMap as $origin => $target) {
+				$where = 'language = ' . $origin;
+				$databaseConnection->exec_UPDATEquery($table, $where, [
+					'language' => $target
+				]);
+				$dbQueries[] = $databaseConnection->debug_lastBuiltQuery;
+			}
 		}
 
 		$this->markWizardAsDone();