AppInfo: add config checks before using backends

Config checks were removed when moving to IBootstrap:
f6bcde7 (Move to IBootstrap initialization and remove the deprecated appinfo/app.php, 2025-04-10)

Due to the missing checks, the Nextcloud log is flooded with error messages (SQL errors) if
the configuration is incomplete. This is also if either only the user or group backend is used.

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 +50,25 @@ 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 $groupBackend,
+		) {
+			if ($userBackend->isConfigured()) {
+				$userManager->registerBackend($userBackend);
+			}
+			if ($groupBackend->isConfigured()) {
+				$groupManager->addBackend($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;
         }
     }