Cache: use at least a capped memory cache if a distributed cache is not available

appinfo/app.php

@@ -1,31 +0,0 @@
-<?php
-/**
- * Nextcloud - user_sql
- *
- * @copyright 2012-2015 Andreas Böhler <dev (at) aboehler (dot) at>
- * @copyright 2018 Marcin Łojewski <dev@mlojewski.me>
- * @author    Marcin Łojewski <dev@mlojewski.me>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-use OCA\UserSQL\AppInfo\Application;
-use OCP\AppFramework\QueryException;
-
-try {
-    $app = new Application();
-    $app->registerBackends();
-} catch (QueryException $queryException) {
-    OC::$server->getLogger()->logException($queryException);
-}

appinfo/info.xml

@@ -22,7 +22,7 @@
     <category>auth</category>
     <dependencies>
         <php min-version="8.0"/>
-        <nextcloud min-version="29" max-version="29"/>
+        <nextcloud min-version="31" max-version="31"/>
     </dependencies>
     <settings>
         <admin>\OCA\UserSQL\Settings\Admin</admin>

lib/Action/EmailSync.php

@@ -27,7 +27,7 @@ use OCA\UserSQL\Model\User;
 use OCA\UserSQL\Properties;
 use OCA\UserSQL\Repository\UserRepository;
 use OCP\IConfig;
-use OCP\ILogger;
+use Psr\Log\LoggerInterface;
 
 /**
  * Synchronizes the user email address.
@@ -41,7 +41,7 @@ class EmailSync implements IUserAction
      */
     private $appName;
     /**
-     * @var ILogger The logger instance.
+     * @var LoggerInterface The logger instance.
      */
     private $logger;
     /**
@@ -61,13 +61,13 @@ class EmailSync implements IUserAction
      * The default constructor.
      *
      * @param string         $appName        The application name.
-     * @param ILogger        $logger         The logger instance.
+     * @param LoggerInterface        $logger         The logger instance.
      * @param Properties     $properties     The properties array.
      * @param IConfig        $config         The config instance.
      * @param UserRepository $userRepository The user repository.
      */
     public function __construct(
-        $appName, ILogger $logger, Properties $properties, IConfig $config,
+        $appName, LoggerInterface $logger, Properties $properties, IConfig $config,
         UserRepository $userRepository
     ) {
         $this->appName = $appName;
@@ -87,6 +87,11 @@ class EmailSync implements IUserAction
             "Entering EmailSync#doAction($user->uid)", ["app" => $this->appName]
         );
 
+		// enforce lowercase
+		if (!empty($user->email)) {
+			$user->email = strtolower($user->email);
+		}
+
         $ncMail = $this->config->getUserValue(
             $user->uid, "settings", "email", ""
         );
@@ -117,7 +122,7 @@ class EmailSync implements IUserAction
 
             break;
         case App::SYNC_FORCE_SQL:
-            if (!empty($user->email) && $user->email !== $ncMail) {
+            if (!empty($user->email) && $user->email !== strtolower($ncMail)) {
                 $this->config->setUserValue(
                     $user->uid, "settings", "email", $user->email
                 );

lib/Action/NameSync.php

@@ -27,7 +27,7 @@ use OCA\UserSQL\Model\User;
 use OCA\UserSQL\Properties;
 use OCA\UserSQL\Repository\UserRepository;
 use OCP\IConfig;
-use OCP\ILogger;
+use Psr\Log\LoggerInterface;
 
 /**
  * Synchronizes the user name.
@@ -41,7 +41,7 @@ class NameSync implements IUserAction
      */
     private $appName;
     /**
-     * @var ILogger The logger instance.
+     * @var LoggerInterface The logger instance.
      */
     private $logger;
     /**
@@ -61,13 +61,13 @@ class NameSync implements IUserAction
      * The default constructor.
      *
      * @param string         $appName        The application name.
-     * @param ILogger        $logger         The logger instance.
+     * @param LoggerInterface        $logger         The logger instance.
      * @param Properties     $properties     The properties array.
      * @param IConfig        $config         The config instance.
      * @param UserRepository $userRepository The user repository.
      */
     public function __construct(
-        $appName, ILogger $logger, Properties $properties, IConfig $config,
+        $appName, LoggerInterface $logger, Properties $properties, IConfig $config,
         UserRepository $userRepository
     ) {
         $this->appName = $appName;

lib/Action/QuotaSync.php

@@ -27,7 +27,7 @@ use OCA\UserSQL\Model\User;
 use OCA\UserSQL\Properties;
 use OCA\UserSQL\Repository\UserRepository;
 use OCP\IConfig;
-use OCP\ILogger;
+use Psr\Log\LoggerInterface;
 
 /**
  * Synchronizes the user quota.
@@ -41,7 +41,7 @@ class QuotaSync implements IUserAction
      */
     private $appName;
     /**
-     * @var ILogger The logger instance.
+     * @var LoggerInterface The logger instance.
      */
     private $logger;
     /**
@@ -61,13 +61,13 @@ class QuotaSync implements IUserAction
      * The default constructor.
      *
      * @param string         $appName        The application name.
-     * @param ILogger        $logger         The logger instance.
+     * @param LoggerInterface        $logger         The logger instance.
      * @param Properties     $properties     The properties array.
      * @param IConfig        $config         The config instance.
      * @param UserRepository $userRepository The user repository.
      */
     public function __construct(
-        $appName, ILogger $logger, Properties $properties, IConfig $config,
+        $appName, LoggerInterface $logger, Properties $properties, IConfig $config,
         UserRepository $userRepository
     ) {
         $this->appName = $appName;

lib/AppInfo/Application.php

@@ -4,6 +4,8 @@
  *
  * @copyright 2018 Marcin Łojewski <dev@mlojewski.me>
  * @author    Marcin Łojewski <dev@mlojewski.me>
+ * @copyright 2025 Claus-Justus Heine <himself@claus-justus-heine.de>
+ * @author    Claus-Justus Heine <himself@claus-justus-heine.de>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as
@@ -22,14 +24,20 @@
 namespace OCA\UserSQL\AppInfo;
 
 use OCP\AppFramework\App;
-use OCP\AppFramework\QueryException;
+use OCP\AppFramework\Bootstrap\IBootContext;
+use OCP\AppFramework\Bootstrap\IBootstrap;
+use OCP\AppFramework\Bootstrap\IRegistrationContext;
+use OCP\IGroupManager;
+use OCP\IUserManager;
+
+use OCA\UserSQL\Backend;
 
 /**
  * The application bootstrap class.
  *
  * @author Marcin Łojewski <dev@mlojewski.me>
  */
-class Application extends App
+class Application extends App implements IBootstrap
 {
     /**
      * The class constructor.
@@ -42,26 +50,21 @@ class Application extends App
         parent::__construct("user_sql", $urlParams);
     }
 
-    /**
+	/** {@inheritdoc} */
-     * Register the application backends
+	public function register(IRegistrationContext $context): void
-     * if all necessary configuration is provided.
+	{}
-     *
-     * @throws QueryException If the query container's could not be resolved
-     */
-    public function registerBackends()
-    {
-        $userBackend = $this->getContainer()->query(
-            '\OCA\UserSQL\Backend\UserBackend'
-        );
-        $groupBackend = $this->getContainer()->query(
-            '\OCA\UserSQL\Backend\GroupBackend'
-        );
 
-        if ($userBackend->isConfigured()) {
+	/** {@inheritdoc} */
-            \OC::$server->getUserManager()->registerBackend($userBackend);
+	public function boot(IBootContext $context): void
-        }
+	{
-        if ($groupBackend->isConfigured()) {
+		$context->injectFn(function(
-            \OC::$server->getGroupManager()->addBackend($groupBackend);
+			IUserManager $userManager,
-        }
+			Backend\UserBackend $userBackend,
-    }
+			IGroupManager $groupManager,
+			Backend\GroupBackend $groupBackend,
+		) {
+			$userManager->registerBackend($userBackend);
+			$groupManager->addBackend($groupBackend);
+		});
+	}
 }

lib/Backend/GroupBackend.php

@@ -3,6 +3,7 @@
  * Nextcloud - user_sql
  *
  * @copyright 2018 Marcin Łojewski <dev@mlojewski.me>
+ * @copyright 2022-2025 Claus-Justus Heine <himself@claus-justus-heine.de>
  * @author    Marcin Łojewski <dev@mlojewski.me>
  *
  * This program is free software: you can redistribute it and/or modify
@@ -33,7 +34,7 @@ use OCP\Group\Backend\IGroupDetailsBackend;
 use OCP\Group\Backend\IIsAdminBackend;
 use OCP\Group\Backend\ISearchableGroupBackend;
 use OCP\Group\Backend\INamedBackedn;
-use OCP\ILogger;
+use Psr\Log\LoggerInterface;
 use OCP\IUserManager;
 
 use OC\User\LazyUser;
@@ -56,7 +57,7 @@ final class GroupBackend extends ABackend implements
      */
     private $appName;
     /**
-     * @var ILogger The logger instance.
+     * @var LoggerInterface The logger instance.
      */
     private $logger;
     /**
@@ -77,12 +78,12 @@ final class GroupBackend extends ABackend implements
      *
      * @param string          $AppName         The application name.
      * @param Cache           $cache           The cache instance.
-     * @param ILogger         $logger          The logger instance.
+     * @param LoggerInterface         $logger          The logger instance.
      * @param Properties      $properties      The properties array.
      * @param GroupRepository $groupRepository The group repository.
      */
     public function __construct(
-        $AppName, Cache $cache, ILogger $logger, Properties $properties,
+        $AppName, Cache $cache, LoggerInterface $logger, Properties $properties,
         GroupRepository $groupRepository
     ) {
         $this->appName = $AppName;
@@ -444,7 +445,7 @@ final class GroupBackend extends ABackend implements
     /**
      * @inheritdoc
      */
-    public function isAdmin(string $uid = null): bool
+    public function isAdmin(?string $uid = null): bool
     {
         $this->logger->debug(
             "Entering isAdmin($uid)", ["app" => $this->appName]

lib/Backend/UserBackend.php

@@ -37,7 +37,7 @@ use OCA\UserSQL\Repository\UserRepository;
 use OCP\EventDispatcher\IEventDispatcher;
 use OCP\IConfig;
 use OCP\IL10N;
-use OCP\ILogger;
+use Psr\Log\LoggerInterface;
 use OCP\Security\Events\ValidatePasswordPolicyEvent;
 use OCP\User\Backend\ABackend;
 use OCP\User\Backend\ICheckPasswordBackend;
@@ -69,7 +69,7 @@ final class UserBackend extends ABackend implements
      */
     private $appName;
     /**
-     * @var ILogger The logger instance.
+     * @var LoggerInterface The logger instance.
      */
     private $logger;
     /**
@@ -106,7 +106,7 @@ final class UserBackend extends ABackend implements
      *
      * @param string           $AppName         The application name.
      * @param Cache            $cache           The cache instance.
-     * @param ILogger          $logger          The logger instance.
+     * @param LoggerInterface          $logger          The logger instance.
      * @param Properties       $properties      The properties array.
      * @param UserRepository   $userRepository  The user repository.
      * @param IL10N            $localization    The localization service.
@@ -114,7 +114,7 @@ final class UserBackend extends ABackend implements
      * @param IEventDispatcher $eventDispatcher The event dispatcher.
      */
     public function __construct(
-        $AppName, Cache $cache, ILogger $logger, Properties $properties,
+        $AppName, Cache $cache, LoggerInterface $logger, Properties $properties,
         UserRepository $userRepository, IL10N $localization, IConfig $config,
         IEventDispatcher $eventDispatcher
     ) {
@@ -261,9 +261,13 @@ final class UserBackend extends ABackend implements
         if ($user instanceof User) {
             $this->cache->set($cacheKey, $user);
 
+			// avoid recursion as the action may very well call into the UserManager again ...
+			$actions = $this->actions;
+			$this->actions = [];
             foreach ($this->actions as $action) {
                 $action->doAction($user);
             }
+			$this->actions = $actions;
         }
 
         return $user;
@@ -345,9 +349,12 @@ final class UserBackend extends ABackend implements
         }
 
         if ($isCorrect !== true) {
-            $this->logger->info(
+            $this->logger->error(
                 "Invalid password attempt for user: $uid",
-                ["app" => $this->appName]
+                [
+					"app" => $this->appName,
+					'exception' => new \Exception('TRACE PROVIDER'),
+				]
             );
             return false;
         }

lib/Cache.php

@@ -5,6 +5,9 @@
  * @copyright 2018 Marcin Łojewski <dev@mlojewski.me>
  * @author    Marcin Łojewski <dev@mlojewski.me>
  *
+ * @copyright 2025 Claus-Justus Heine <himself@claus-justus-heine.de>
+ * @author    Claus-Justus Heine <himself@claus-justus-heine.de>
+ *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as
  * published by the Free Software Foundation, either version 3 of the
@@ -26,7 +29,7 @@ use OCA\UserSQL\Constant\App;
 use OCA\UserSQL\Constant\Opt;
 use OCP\ICache;
 use OCP\IConfig;
-use OCP\ILogger;
+use Psr\Log\LoggerInterface;
 
 /**
  * Used to store key-value pairs in the cache memory.
@@ -39,16 +42,16 @@ class Cache
     /**
      * @var ICache The cache instance.
      */
-    private $cache;
+    private $cache = null;
 
     /**
      * The default constructor. Initiates the cache memory.
      *
      * @param string  $AppName The application name.
      * @param IConfig $config  The config instance.
-     * @param ILogger $logger  The logger instance.
+     * @param LoggerInterface $logger  The logger instance.
      */
-    public function __construct($AppName, IConfig $config, ILogger $logger)
+    public function __construct($AppName, IConfig $config, LoggerInterface $logger)
     {
         $factory = \OC::$server->getMemCacheFactory();
         $useCache = $config->getAppValue(
@@ -57,16 +60,20 @@ class Cache
 
         if ($useCache === App::FALSE_VALUE) {
             $this->cache = new NullCache();
-        } elseif ($factory->isAvailable()) {
-            $this->cache = $factory->createDistributed();
-            $logger->debug("Distributed cache initiated.", ["app" => $AppName]);
         } else {
-            $logger->warning(
+			if ($factory->isAvailable()) {
-                "There's no distributed cache available, fallback to null cache.",
+				$this->cache = $factory->createDistributed();
-                ["app" => $AppName]
+			}
-            );
+			if ($this->cache === null || ($this->cache instanceof NullCache)) {
-            $this->cache = new NullCache();
+				$logger->debug(
-        }
+					"There's no distributed cache available, fallback to capped in-memory cache.",
+					["app" => $AppName]
+				);
+				$this->cache = $factory->createInMemory(128);
+			} else {
+				$logger->debug("Distributed cache initiated.", ["app" => $AppName]);
+			}
+		}
     }
 
     /**

lib/Controller/SettingsController.php

@@ -37,7 +37,7 @@ use OCA\UserSQL\Platform\PlatformFactory;
 use OCA\UserSQL\Properties;
 use OCP\AppFramework\Controller;
 use OCP\IL10N;
-use OCP\ILogger;
+use Psr\Log\LoggerInterface;
 use OCP\IRequest;
 use ReflectionClass;
 use ReflectionException;
@@ -50,7 +50,7 @@ use ReflectionException;
 class SettingsController extends Controller
 {
     /**
-     * @var ILogger The logger instance.
+     * @var LoggerInterface The logger instance.
      */
     private $logger;
     /**
@@ -71,13 +71,13 @@ class SettingsController extends Controller
      *
      * @param string     $appName      The application name.
      * @param IRequest   $request      An instance of the request.
-     * @param ILogger    $logger       The logger instance.
+     * @param LoggerInterface    $logger       The logger instance.
      * @param IL10N      $localization The localization service.
      * @param Properties $properties   The properties array.
      * @param Cache      $cache        The cache instance.
      */
     public function __construct(
-        $appName, IRequest $request, ILogger $logger, IL10N $localization,
+        $appName, IRequest $request, LoggerInterface $logger, IL10N $localization,
         Properties $properties, Cache $cache
     ) {
         parent::__construct($appName, $request);
@@ -384,7 +384,7 @@ class SettingsController extends Controller
 
             return $tables;
         } catch (Exception $e) {
-            $this->logger->logException($e);
+            $this->logger->error('Error during table autocompletion', [ 'exception' => $e ]);
             return [];
         }
     }
@@ -431,7 +431,7 @@ class SettingsController extends Controller
 
             return $columns;
         } catch (Exception $e) {
-            $this->logger->logException($e);
+            $this->logger->error('Error during column autocompletion', [ 'exception' => $e ]);
             return [];
         }
     }

lib/Properties.php

@@ -25,7 +25,7 @@ use OCA\UserSQL\Constant\App;
 use OCA\UserSQL\Constant\DB;
 use OCA\UserSQL\Constant\Opt;
 use OCP\IConfig;
-use OCP\ILogger;
+use Psr\Log\LoggerInterface;
 
 /**
  * Store and retrieve application properties.
@@ -48,7 +48,7 @@ class Properties implements \ArrayAccess
      */
     private $config;
     /**
-     * @var ILogger The logger instance.
+     * @var LoggerInterface The logger instance.
      */
     private $logger;
     /**
@@ -69,11 +69,11 @@ class Properties implements \ArrayAccess
      *
      * @param string  $AppName The application name.
      * @param IConfig $config  The config instance.
-     * @param ILogger $logger  The logger instance.
+     * @param LoggerInterface $logger  The logger instance.
      * @param Cache   $cache   The cache instance.
      */
     public function __construct(
-        $AppName, IConfig $config, ILogger $logger, Cache $cache
+        $AppName, IConfig $config, LoggerInterface $logger, Cache $cache
     ) {
         $this->appName = $AppName;
         $this->config = $config;
@@ -144,9 +144,7 @@ class Properties implements \ArrayAccess
                     $params, array_values($reflection->getConstants())
                 );
             } catch (\ReflectionException $exception) {
-                $this->logger->logException(
+                $this->logger->error('Unable to determine parameter names', [ 'exception'=> $exception ]);
-                    $exception, ["app" => $this->appName]
-                );
             }
         }
 

lib/Query/DataQuery.php

@@ -28,7 +28,7 @@ use OC\DB\ConnectionFactory;
 use OCA\UserSQL\Constant\DB;
 use OCA\UserSQL\Constant\Query;
 use OCA\UserSQL\Properties;
-use OCP\ILogger;
+use Psr\Log\LoggerInterface;
 
 /**
  * Used to query a database.
@@ -42,7 +42,7 @@ class DataQuery
      */
     private $appName;
     /**
-     * @var ILogger The logger instance.
+     * @var LoggerInterface The logger instance.
      */
     private $logger;
     /**
@@ -62,12 +62,12 @@ class DataQuery
      * The class constructor.
      *
      * @param string        $AppName       The application name.
-     * @param ILogger       $logger        The logger instance.
+     * @param LoggerInterface       $logger        The logger instance.
      * @param Properties    $properties    The properties array.
      * @param QueryProvider $queryProvider The query provider.
      */
     public function __construct(
-        $AppName, ILogger $logger, Properties $properties,
+        $AppName, LoggerInterface $logger, Properties $properties,
         QueryProvider $queryProvider
     ) {
         $this->appName = $AppName;
@@ -113,9 +113,7 @@ class DataQuery
         try {
             $result = $this->connection->prepare($query, $limit, $offset);
         } catch (DBALException  $exception) {
-            $this->logger->logException(
+            $this->logger->error('Could not prepare the query: ' . $query, [ 'exception' => $exception ]);
-				$exception, [ 'message' => "Could not prepare the query: " . $query ]
-			);
             return false;
         }
 
@@ -130,9 +128,7 @@ class DataQuery
             return $result;
 
         } catch (DBALException  $exception) {
-            $this->logger->logException(
+            $this->logger->error('Could not execute the query: ' . $query, [ 'exception' => $exception ]);
-				$exception, [ 'message' => "Could not execute the query: " . $query ]
-			);
             return false;
         }
     }