From ed55ddb169bffdca2855813b12889c5ed7b17014 Mon Sep 17 00:00:00 2001
From: Imko Schumacher <okmiim@live.de>
Date: Thu, 12 May 2022 21:57:03 +0200
Subject: [PATCH] Handle FlashMessage exceptions inside upgrade wizard

When this class is called from the install tool/upgrade wizard, the
globals `LANG` and `BE_USER` may not be set and cause exceptions.
---
 .../Service/TimeTable/ExternalTimeTable.php   |  9 ++--
 Classes/Utility/HelperUtility.php             | 49 +++++++++++++++++--
 2 files changed, 50 insertions(+), 8 deletions(-)

diff --git a/Classes/Service/TimeTable/ExternalTimeTable.php b/Classes/Service/TimeTable/ExternalTimeTable.php
index b743fe6c..9b6c5f30 100644
--- a/Classes/Service/TimeTable/ExternalTimeTable.php
+++ b/Classes/Service/TimeTable/ExternalTimeTable.php
@@ -14,7 +14,6 @@
 use HDNET\Calendarize\Utility\HelperUtility;
 use TYPO3\CMS\Core\Messaging\FlashMessage;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
-use TYPO3\CMS\Extbase\Utility\LocalizationUtility;
 
 /**
  * External service.
@@ -60,9 +59,9 @@ public function handleConfiguration(array &$times, Configuration $configuration)
         try {
             $fileName = $this->iCalUrlService->getOrCreateLocalFileForUrl($externalIcsUrl);
         } catch (UnableToGetFileForUrlException $e) {
-            HelperUtility::createFlashMessage(
+            HelperUtility::createTranslatedTitleFlashMessage(
                 $e->getMessage(),
-                LocalizationUtility::translate('flashMessage.invalidExternalUrl.title', 'calendarize') ?? '',
+                'flashMessage.invalidExternalUrl.title',
                 FlashMessage::ERROR
             );
 
@@ -72,9 +71,9 @@ public function handleConfiguration(array &$times, Configuration $configuration)
         try {
             $externalTimes = $this->iCalService->getEvents($fileName);
         } catch (\Exception $e) {
-            HelperUtility::createFlashMessage(
+            HelperUtility::createTranslatedTitleFlashMessage(
                 $e->getMessage(),
-                LocalizationUtility::translate('flashMessage.unableToProcessEvents.title', 'calendarize') ?? '',
+                'flashMessage.unableToProcessEvents.title',
                 FlashMessage::ERROR
             );
 
diff --git a/Classes/Utility/HelperUtility.php b/Classes/Utility/HelperUtility.php
index be616b12..88a578ff 100644
--- a/Classes/Utility/HelperUtility.php
+++ b/Classes/Utility/HelperUtility.php
@@ -7,6 +7,7 @@
 
 namespace HDNET\Calendarize\Utility;
 
+use TYPO3\CMS\Core\Authentication\AbstractUserAuthentication;
 use TYPO3\CMS\Core\Core\Environment;
 use TYPO3\CMS\Core\Database\Connection;
 use TYPO3\CMS\Core\Database\ConnectionPool;
@@ -18,6 +19,8 @@
 use TYPO3\CMS\Extbase\Persistence\PersistenceManagerInterface;
 use TYPO3\CMS\Extbase\Persistence\QueryInterface;
 use TYPO3\CMS\Extbase\Utility\LocalizationUtility;
+use TYPO3\CMS\Frontend\Authentication\FrontendUserAuthentication;
+use TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController;
 
 /**
  * Helper Utility.
@@ -57,7 +60,8 @@ public static function getQuery($objectName)
     public static function createFlashMessage(string $message, string $title = '', int $mode = FlashMessage::OK): void
     {
         // Don't store flash messages in CLI context
-        $storeInSession = !Environment::isCli();
+        // Note: the getUserByContext check is only required for TYPO3 v10 and is fixed in v11 (94418).
+        $storeInSession = !Environment::isCli() && null !== self::getUserByContext();
         $flashMessage = GeneralUtility::makeInstance(FlashMessage::class, $message, $title, $mode, $storeInSession);
         $flashMessageService = GeneralUtility::makeInstance(FlashMessageService::class);
         $messageQueue = $flashMessageService->getMessageQueueByIdentifier();
@@ -75,8 +79,32 @@ public static function createFlashMessage(string $message, string $title = '', i
      */
     public static function createTranslatedFlashMessage(string $messageKey, string $titleKey = '', int $mode = FlashMessage::OK): void
     {
-        $message = LocalizationUtility::translate($messageKey, 'calendarize') ?? $messageKey;
-        $title = LocalizationUtility::translate($titleKey, 'calendarize') ?? $titleKey;
+        try {
+            $message = LocalizationUtility::translate($messageKey, 'calendarize') ?? $messageKey;
+            $title = LocalizationUtility::translate($titleKey, 'calendarize') ?? $titleKey;
+        } catch (\TypeError $e) {
+            $message = $messageKey;
+            $title = $titleKey;
+        }
+        self::createFlashMessage($message, $title, $mode);
+    }
+
+    /**
+     * Create a flash message with a translated title.
+     *
+     * @param string $messageKey
+     * @param string $titleKey
+     * @param int    $mode
+     *
+     * @throws Exception
+     */
+    public static function createTranslatedTitleFlashMessage(string $message, string $titleKey = '', int $mode = FlashMessage::OK): void
+    {
+        try {
+            $title = LocalizationUtility::translate($titleKey, 'calendarize') ?? $titleKey;
+        } catch (\TypeError $e) {
+            $title = $titleKey;
+        }
         self::createFlashMessage($message, $title, $mode);
     }
 
@@ -91,4 +119,19 @@ public static function getDatabaseConnection($table)
     {
         return GeneralUtility::makeInstance(ConnectionPool::class)->getConnectionForTable($table);
     }
+
+    /**
+     * Gets user object by context.
+     * This class is also used in install tool, where $GLOBALS['BE_USER'] is not set and can be null.
+     *
+     * @return AbstractUserAuthentication|null
+     */
+    protected static function getUserByContext(): ?AbstractUserAuthentication
+    {
+        if (($GLOBALS['TSFE'] ?? null) instanceof TypoScriptFrontendController && $GLOBALS['TSFE']->fe_user instanceof FrontendUserAuthentication) {
+            return $GLOBALS['TSFE']->fe_user;
+        }
+
+        return $GLOBALS['BE_USER'] ?? null;
+    }
 }