Merge pull request #32363 from nextcloud/cleanup/remove-long-deprecated-classes

Remove OCP\App and OCP\BackgroundJob

28 files changed, 120 insertions, 260 deletions

diff --git a/apps/dav/lib/Connector/Sabre/File.php b/apps/dav/lib/Connector/Sabre/File.php
index ebcfdabc6b3..94632b265db 100644
--- a/apps/dav/lib/Connector/Sabre/File.php
+++ b/apps/dav/lib/Connector/Sabre/File.php
@@ -553,7 +553,7 @@ class File extends Node implements IFile {
 	 * @return array|bool
 	 */
 	public function getDirectDownload() {
-		if (\OCP\App::isEnabled('encryption')) {
+		if (\OCP\Server::get(\OCP\App\IAppManager::class)->isEnabledForUser('encryption')) {
 			return [];
 		}
 		/** @var \OCP\Files\Storage $storage */
diff --git a/apps/encryption/templates/mail.php b/apps/encryption/templates/mail.php
index 2cfd415b646..0db4b67d08d 100644
--- a/apps/encryption/templates/mail.php
+++ b/apps/encryption/templates/mail.php
@@ -7,7 +7,7 @@
 			<table cellspacing="0" cellpadding="0" border="0" width="600px">
 				<tr>
 					<td colspan="2" bgcolor="<?php p($theme->getColorPrimary());?>">
-						<img src="<?php p(\OC::$server->getURLGenerator()->getAbsoluteURL(image_path('', 'logo-mail.png'))); ?>" alt="<?php p($theme->getName()); ?>"/>
+						<img src="<?php p(\OC::$server->getURLGenerator()->getAbsoluteURL(image_path('core', 'logo-mail.png'))); ?>" alt="<?php p($theme->getName()); ?>"/>
 					</td>
 				</tr>
 				<tr><td colspan="2">&nbsp;</td></tr>
diff --git a/apps/federatedfilesharing/lib/Controller/RequestHandlerController.php b/apps/federatedfilesharing/lib/Controller/RequestHandlerController.php
index fe0c7a11ab7..c5e1a8b4e7e 100644
--- a/apps/federatedfilesharing/lib/Controller/RequestHandlerController.php
+++ b/apps/federatedfilesharing/lib/Controller/RequestHandlerController.php
@@ -35,6 +35,7 @@ use OCP\AppFramework\OCS\OCSBadRequestException;
 use OCP\AppFramework\OCS\OCSException;
 use OCP\AppFramework\OCS\OCSForbiddenException;
 use OCP\AppFramework\OCSController;
+use OCP\App\IAppManager;
 use OCP\Constants;
 use OCP\EventDispatcher\IEventDispatcher;
 use OCP\Federation\Exceptions\ProviderCouldNotAddShareException;
@@ -366,7 +367,7 @@ class RequestHandlerController extends OCSController {
 	 * @return bool
 	 */
 	private function isS2SEnabled($incoming = false) {
-		$result = \OCP\App::isEnabled('files_sharing');
+		$result = \OCP\Server::get(IAppManager::class)->isEnabledForUser('files_sharing');
 
 		if ($incoming) {
 			$result = $result && $this->federatedShareProvider->isIncomingServer2serverShareEnabled();
diff --git a/apps/files_trashbin/lib/Trashbin.php b/apps/files_trashbin/lib/Trashbin.php
index d449a136016..975e9fd2557 100644
--- a/apps/files_trashbin/lib/Trashbin.php
+++ b/apps/files_trashbin/lib/Trashbin.php
@@ -54,6 +54,7 @@ use OC\Files\View;
 use OCA\Files_Trashbin\AppInfo\Application;
 use OCA\Files_Trashbin\Command\Expire;
 use OCP\AppFramework\Utility\ITimeFactory;
+use OCP\App\IAppManager;
 use OCP\Files\File;
 use OCP\Files\Folder;
 use OCP\Files\NotFoundException;
@@ -395,7 +396,7 @@ class Trashbin {
 	 * @param integer $timestamp when the file was deleted
 	 */
 	private static function retainVersions($filename, $owner, $ownerPath, $timestamp) {
-		if (\OCP\App::isEnabled('files_versions') && !empty($ownerPath)) {
+		if (\OCP\Server::get(IAppManager::class)->isEnabledForUser('files_versions') && !empty($ownerPath)) {
 			$user = OC_User::getUser();
 			$rootView = new View('/');
 
@@ -543,7 +544,7 @@ class Trashbin {
 	 * @return false|null
 	 */
 	private static function restoreVersions(View $view, $file, $filename, $uniqueFilename, $location, $timestamp) {
-		if (\OCP\App::isEnabled('files_versions')) {
+		if (\OCP\Server::get(IAppManager::class)->isEnabledForUser('files_versions')) {
 			$user = OC_User::getUser();
 			$rootView = new View('/');
 
@@ -704,7 +705,7 @@ class Trashbin {
 	 */
 	private static function deleteVersions(View $view, $file, $filename, $timestamp, $user) {
 		$size = 0;
-		if (\OCP\App::isEnabled('files_versions')) {
+		if (\OCP\Server::get(IAppManager::class)->isEnabledForUser('files_versions')) {
 			if ($view->is_dir('files_trashbin/versions/' . $file)) {
 				$size += self::calculateSize(new View('/' . $user . '/files_trashbin/versions/' . $file));
 				$view->unlink('files_trashbin/versions/' . $file);
diff --git a/apps/provisioning_api/tests/Controller/AppsControllerTest.php b/apps/provisioning_api/tests/Controller/AppsControllerTest.php
index d4237508a31..187247b9f66 100644
--- a/apps/provisioning_api/tests/Controller/AppsControllerTest.php
+++ b/apps/provisioning_api/tests/Controller/AppsControllerTest.php
@@ -67,7 +67,7 @@ class AppsControllerTest extends \OCA\Provisioning_API\Tests\TestCase {
 
 	public function testGetAppInfo() {
 		$result = $this->api->getAppInfo('provisioning_api');
-		$expected = \OC_App::getAppInfo('provisioning_api');
+		$expected = $this->appManager->getAppInfo('provisioning_api');
 		$this->assertEquals($expected, $result->getData());
 	}
 
diff --git a/apps/user_ldap/templates/part.settingcontrols.php b/apps/user_ldap/templates/part.settingcontrols.php
index a418885f47e..97f80bc13f7 100644
--- a/apps/user_ldap/templates/part.settingcontrols.php
+++ b/apps/user_ldap/templates/part.settingcontrols.php
@@ -4,7 +4,7 @@
 	</button>
 	<a href="<?php p(link_to_docs('admin-ldap')); ?>"
 		target="_blank" rel="noreferrer noopener">
-		<img src="<?php print_unescaped(image_path('', 'actions/info.svg')); ?>"
+		<img src="<?php print_unescaped(image_path('core', 'actions/info.svg')); ?>"
 			style="height:1.75ex" />
 		<?php p($l->t('Help'));?>
 	</a>
diff --git a/apps/user_ldap/templates/part.wizardcontrols.php b/apps/user_ldap/templates/part.wizardcontrols.php
index bd84b23c76d..d9a6fab60e7 100644
--- a/apps/user_ldap/templates/part.wizardcontrols.php
+++ b/apps/user_ldap/templates/part.wizardcontrols.php
@@ -10,7 +10,7 @@
 	</button>
 	<a href="<?php p(link_to_docs('admin-ldap')); ?>"
 		target="_blank" rel="noreferrer noopener">
-		<img src="<?php print_unescaped(image_path('', 'actions/info.svg')); ?>"
+		<img src="<?php print_unescaped(image_path('core', 'actions/info.svg')); ?>"
 			style="height:1.75ex" />
 		<span class="ldap_grey"><?php p($l->t('Help'));?></span>
 	</a>
diff --git a/core/Command/Maintenance/Repair.php b/core/Command/Maintenance/Repair.php
index aa0f6a2a086..2c1fda7c8e4 100644
--- a/core/Command/Maintenance/Repair.php
+++ b/core/Command/Maintenance/Repair.php
@@ -82,7 +82,7 @@ class Repair extends Command {
 			if (!$this->appManager->isEnabledForUser($app)) {
 				continue;
 			}
-			$info = \OC_App::getAppInfo($app);
+			$info = $this->appManager->getAppInfo($app);
 			if (!is_array($info)) {
 				continue;
 			}
diff --git a/core/Command/User/ResetPassword.php b/core/Command/User/ResetPassword.php
index 21bc5cc45b0..294cea38b71 100644
--- a/core/Command/User/ResetPassword.php
+++ b/core/Command/User/ResetPassword.php
@@ -28,6 +28,7 @@
 namespace OC\Core\Command\User;
 
 use OC\Core\Command\Base;
+use OCP\App\IAppManager;
 use OCP\IUser;
 use OCP\IUserManager;
 use Stecman\Component\Symfony\Console\BashCompletion\CompletionContext;
@@ -41,10 +42,12 @@ use Symfony\Component\Console\Question\Question;
 
 class ResetPassword extends Base {
 	protected IUserManager $userManager;
+	private IAppManager $appManager;
 
-	public function __construct(IUserManager $userManager) {
-		$this->userManager = $userManager;
+	public function __construct(IUserManager $userManager, IAppManager $appManager) {
 		parent::__construct();
+		$this->userManager = $userManager;
+		$this->appManager = $appManager;
 	}
 
 	protected function configure() {
@@ -84,7 +87,7 @@ class ResetPassword extends Base {
 			/** @var QuestionHelper $helper */
 			$helper = $this->getHelper('question');
 
-			if (\OCP\App::isEnabled('encryption')) {
+			if ($this->appManager->isEnabledForUser('encryption', $user)) {
 				$output->writeln(
 					'<error>Warning: Resetting the password when using encryption will result in data loss!</error>'
 				);
diff --git a/core/register_command.php b/core/register_command.php
index d80465e0906..98a653aed7e 100644
--- a/core/register_command.php
+++ b/core/register_command.php
@@ -183,7 +183,7 @@ if (\OC::$server->getConfig()->getSystemValue('installed', false)) {
 	$application->add(new OC\Core\Command\User\Enable(\OC::$server->getUserManager()));
 	$application->add(new OC\Core\Command\User\LastSeen(\OC::$server->getUserManager()));
 	$application->add(\OC::$server->get(\OC\Core\Command\User\Report::class));
-	$application->add(new OC\Core\Command\User\ResetPassword(\OC::$server->getUserManager()));
+	$application->add(new OC\Core\Command\User\ResetPassword(\OC::$server->getUserManager(), \OC::$server->getAppManager()));
 	$application->add(new OC\Core\Command\User\Setting(\OC::$server->getUserManager(), \OC::$server->getConfig()));
 	$application->add(new OC\Core\Command\User\ListCommand(\OC::$server->getUserManager(), \OC::$server->getGroupManager()));
 	$application->add(new OC\Core\Command\User\Info(\OC::$server->getUserManager(), \OC::$server->getGroupManager()));
diff --git a/core/templates/installation.php b/core/templates/installation.php
index b08f1cd9ac1..45d9cfc9252 100644
--- a/core/templates/installation.php
+++ b/core/templates/installation.php
@@ -55,7 +55,7 @@ script('core', 'install');
 
 	<?php if (!$_['directoryIsSet'] or !$_['dbIsSet'] or count($_['errors']) > 0): ?>
 	<fieldset id="advancedHeader">
-		<legend><a id="showAdvanced" tabindex="0" href="#"><?php p($l->t('Storage & database')); ?><img src="<?php print_unescaped(image_path('', 'actions/caret.svg')); ?>" /></a></legend>
+		<legend><a id="showAdvanced" tabindex="0" href="#"><?php p($l->t('Storage & database')); ?><img src="<?php print_unescaped(image_path('core', 'actions/caret.svg')); ?>" /></a></legend>
 	</fieldset>
 	<?php endif; ?>
 
diff --git a/core/templates/layout.base.php b/core/templates/layout.base.php
index 0eb80098889..d8a54bfec2e 100644
--- a/core/templates/layout.base.php
+++ b/core/templates/layout.base.php
@@ -7,9 +7,9 @@
 		</title>
 		<meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0">
 		<meta name="theme-color" content="<?php p($theme->getColorPrimary()); ?>">
-		<link rel="icon" href="<?php print_unescaped(image_path('', 'favicon.ico')); /* IE11+ supports png */ ?>">
-		<link rel="apple-touch-icon" href="<?php print_unescaped(image_path('', 'favicon-touch.png')); ?>">
-		<link rel="mask-icon" sizes="any" href="<?php print_unescaped(image_path('', 'favicon-mask.svg')); ?>" color="<?php p($theme->getColorPrimary()); ?>">
+		<link rel="icon" href="<?php print_unescaped(image_path('core', 'favicon.ico')); /* IE11+ supports png */ ?>">
+		<link rel="apple-touch-icon" href="<?php print_unescaped(image_path('core', 'favicon-touch.png')); ?>">
+		<link rel="mask-icon" sizes="any" href="<?php print_unescaped(image_path('core', 'favicon-mask.svg')); ?>" color="<?php p($theme->getColorPrimary()); ?>">
 		<?php emit_css_loading_tags($_); ?>
 		<?php emit_script_loading_tags($_); ?>
 		<?php print_unescaped($_['headers']); ?>
diff --git a/core/templates/layout.guest.php b/core/templates/layout.guest.php
index 432bc4e8601..c275d9746b7 100644
--- a/core/templates/layout.guest.php
+++ b/core/templates/layout.guest.php
@@ -17,10 +17,10 @@
 		<meta name="apple-itunes-app" content="app-id=<?php p($theme->getiTunesAppId()); ?>">
 		<?php } ?>
 		<meta name="theme-color" content="<?php p($theme->getColorPrimary()); ?>">
-		<link rel="icon" href="<?php print_unescaped(image_path('', 'favicon.ico')); /* IE11+ supports png */ ?>">
-		<link rel="apple-touch-icon" href="<?php print_unescaped(image_path('', 'favicon-touch.png')); ?>">
-		<link rel="mask-icon" sizes="any" href="<?php print_unescaped(image_path('', 'favicon-mask.svg')); ?>" color="<?php p($theme->getColorPrimary()); ?>">
-		<link rel="manifest" href="<?php print_unescaped(image_path('', 'manifest.json')); ?>">
+		<link rel="icon" href="<?php print_unescaped(image_path('core', 'favicon.ico')); /* IE11+ supports png */ ?>">
+		<link rel="apple-touch-icon" href="<?php print_unescaped(image_path('core', 'favicon-touch.png')); ?>">
+		<link rel="mask-icon" sizes="any" href="<?php print_unescaped(image_path('core', 'favicon-mask.svg')); ?>" color="<?php p($theme->getColorPrimary()); ?>">
+		<link rel="manifest" href="<?php print_unescaped(image_path('core', 'manifest.json')); ?>">
 		<?php emit_css_loading_tags($_); ?>
 		<?php emit_script_loading_tags($_); ?>
 		<?php print_unescaped($_['headers']); ?>
diff --git a/lib/composer/composer/autoload_classmap.php b/lib/composer/composer/autoload_classmap.php
index c55fb8080b0..004c569d21b 100644
--- a/lib/composer/composer/autoload_classmap.php
+++ b/lib/composer/composer/autoload_classmap.php
@@ -21,7 +21,6 @@ return array(
     'OCP\\Activity\\IManager' => $baseDir . '/lib/public/Activity/IManager.php',
     'OCP\\Activity\\IProvider' => $baseDir . '/lib/public/Activity/IProvider.php',
     'OCP\\Activity\\ISetting' => $baseDir . '/lib/public/Activity/ISetting.php',
-    'OCP\\App' => $baseDir . '/lib/public/App.php',
     'OCP\\AppFramework\\ApiController' => $baseDir . '/lib/public/AppFramework/ApiController.php',
     'OCP\\AppFramework\\App' => $baseDir . '/lib/public/AppFramework/App.php',
     'OCP\\AppFramework\\AuthPublicShareController' => $baseDir . '/lib/public/AppFramework/AuthPublicShareController.php',
@@ -110,7 +109,6 @@ return array(
     'OCP\\Authentication\\TwoFactorAuth\\TwoFactorProviderForUserDisabled' => $baseDir . '/lib/public/Authentication/TwoFactorAuth/TwoFactorProviderForUserDisabled.php',
     'OCP\\Authentication\\TwoFactorAuth\\TwoFactorProviderForUserEnabled' => $baseDir . '/lib/public/Authentication/TwoFactorAuth/TwoFactorProviderForUserEnabled.php',
     'OCP\\AutoloadNotAllowedException' => $baseDir . '/lib/public/AutoloadNotAllowedException.php',
-    'OCP\\BackgroundJob' => $baseDir . '/lib/public/BackgroundJob.php',
     'OCP\\BackgroundJob\\IJob' => $baseDir . '/lib/public/BackgroundJob/IJob.php',
     'OCP\\BackgroundJob\\IJobList' => $baseDir . '/lib/public/BackgroundJob/IJobList.php',
     'OCP\\BackgroundJob\\Job' => $baseDir . '/lib/public/BackgroundJob/Job.php',
diff --git a/lib/composer/composer/autoload_static.php b/lib/composer/composer/autoload_static.php
index 16b147814c4..8c13e047b3e 100644
--- a/lib/composer/composer/autoload_static.php
+++ b/lib/composer/composer/autoload_static.php
@@ -54,7 +54,6 @@ class ComposerStaticInit749170dad3f5e7f9ca158f5a9f04f6a2
         'OCP\\Activity\\IManager' => __DIR__ . '/../../..' . '/lib/public/Activity/IManager.php',
         'OCP\\Activity\\IProvider' => __DIR__ . '/../../..' . '/lib/public/Activity/IProvider.php',
         'OCP\\Activity\\ISetting' => __DIR__ . '/../../..' . '/lib/public/Activity/ISetting.php',
-        'OCP\\App' => __DIR__ . '/../../..' . '/lib/public/App.php',
         'OCP\\AppFramework\\ApiController' => __DIR__ . '/../../..' . '/lib/public/AppFramework/ApiController.php',
         'OCP\\AppFramework\\App' => __DIR__ . '/../../..' . '/lib/public/AppFramework/App.php',
         'OCP\\AppFramework\\AuthPublicShareController' => __DIR__ . '/../../..' . '/lib/public/AppFramework/AuthPublicShareController.php',
@@ -143,7 +142,6 @@ class ComposerStaticInit749170dad3f5e7f9ca158f5a9f04f6a2
         'OCP\\Authentication\\TwoFactorAuth\\TwoFactorProviderForUserDisabled' => __DIR__ . '/../../..' . '/lib/public/Authentication/TwoFactorAuth/TwoFactorProviderForUserDisabled.php',
         'OCP\\Authentication\\TwoFactorAuth\\TwoFactorProviderForUserEnabled' => __DIR__ . '/../../..' . '/lib/public/Authentication/TwoFactorAuth/TwoFactorProviderForUserEnabled.php',
         'OCP\\AutoloadNotAllowedException' => __DIR__ . '/../../..' . '/lib/public/AutoloadNotAllowedException.php',
-        'OCP\\BackgroundJob' => __DIR__ . '/../../..' . '/lib/public/BackgroundJob.php',
         'OCP\\BackgroundJob\\IJob' => __DIR__ . '/../../..' . '/lib/public/BackgroundJob/IJob.php',
         'OCP\\BackgroundJob\\IJobList' => __DIR__ . '/../../..' . '/lib/public/BackgroundJob/IJobList.php',
         'OCP\\BackgroundJob\\Job' => __DIR__ . '/../../..' . '/lib/public/BackgroundJob/Job.php',
diff --git a/lib/private/AppFramework/App.php b/lib/private/AppFramework/App.php
index feebb32d5bc..170acba0689 100644
--- a/lib/private/AppFramework/App.php
+++ b/lib/private/AppFramework/App.php
@@ -237,8 +237,6 @@ class App {
 	/**
 	 * Shortcut for calling a controller method and printing the result.
 	 * Similar to App:main except that no headers will be sent.
-	 * This should be used for example when registering sections via
-	 * \OC\AppFramework\Core\API::registerAdmin()
 	 *
 	 * @param string $controllerName the name of the controller under which it is
 	 *                               stored in the DI container
diff --git a/lib/private/Console/Application.php b/lib/private/Console/Application.php
index 12d54b48fa9..fc48f57e499 100644
--- a/lib/private/Console/Application.php
+++ b/lib/private/Console/Application.php
@@ -34,6 +34,7 @@ use OC\MemoryInfo;
 use OC\NeedsUpdateException;
 use OC_App;
 use OCP\AppFramework\QueryException;
+use OCP\App\IAppManager;
 use OCP\Console\ConsoleEvent;
 use OCP\IConfig;
 use OCP\IRequest;
@@ -117,13 +118,14 @@ class Application {
 					$this->writeMaintenanceModeInfo($input, $output);
 				} else {
 					OC_App::loadApps();
-					foreach (\OC::$server->getAppManager()->getInstalledApps() as $app) {
+					$appManager = \OCP\Server::get(IAppManager::class);
+					foreach ($appManager->getInstalledApps() as $app) {
 						$appPath = \OC_App::getAppPath($app);
 						if ($appPath === false) {
 							continue;
 						}
 						// load commands using info.xml
-						$info = \OC_App::getAppInfo($app);
+						$info = $appManager->getAppInfo($app);
 						if (isset($info['commands'])) {
 							$this->loadCommandsFromInfoXml($info['commands']);
 						}
diff --git a/lib/private/Encryption/File.php b/lib/private/Encryption/File.php
index 844059923bd..87bc35bc159 100644
--- a/lib/private/Encryption/File.php
+++ b/lib/private/Encryption/File.php
@@ -29,27 +29,22 @@ namespace OC\Encryption;
 
 use OCP\Cache\CappedMemoryCache;
 use OCA\Files_External\Service\GlobalStoragesService;
+use OCP\App\IAppManager;
 use OCP\Files\IRootFolder;
 use OCP\Files\NotFoundException;
 use OCP\Share\IManager;
 
 class File implements \OCP\Encryption\IFile {
-
-	/** @var Util */
-	protected $util;
-
-	/** @var IRootFolder */
-	private $rootFolder;
-
-	/** @var IManager */
-	private $shareManager;
+	protected Util $util;
+	private IRootFolder $rootFolder;
+	private IManager $shareManager;
 
 	/**
-	 * cache results of already checked folders
-	 *
+	 * Cache results of already checked folders
 	 * @var CappedMemoryCache<array>
 	 */
 	protected CappedMemoryCache $cache;
+	private ?IAppManager $appManager = null;
 
 	public function __construct(Util $util,
 								IRootFolder $rootFolder,
@@ -60,6 +55,14 @@ class File implements \OCP\Encryption\IFile {
 		$this->shareManager = $shareManager;
 	}
 
+	public function getAppManager(): IAppManager {
+		// Lazy evaluate app manager as it initialize the db too early otherwise
+		if ($this->appManager) {
+			return $this->appManager;
+		}
+		$this->appManager = \OCP\Server::get(IAppManager::class);
+		return $this->appManager;
+	}
 
 	/**
 	 * Get list of users with access to the file
@@ -110,7 +113,7 @@ class File implements \OCP\Encryption\IFile {
 		}
 
 		// check if it is a group mount
-		if (\OCP\App::isEnabled("files_external")) {
+		if ($this->getAppManager()->isEnabledForUser("files_external")) {
 			/** @var GlobalStoragesService $storageService */
 			$storageService = \OC::$server->get(GlobalStoragesService::class);
 			$storages = $storageService->getAllStorages();
diff --git a/lib/private/Encryption/Util.php b/lib/private/Encryption/Util.php
index 174af2e8b89..410ea19da81 100644
--- a/lib/private/Encryption/Util.php
+++ b/lib/private/Encryption/Util.php
@@ -34,9 +34,12 @@ use OC\Files\Filesystem;
 use OC\Files\View;
 use OCA\Files_External\Lib\StorageConfig;
 use OCA\Files_External\Service\GlobalStoragesService;
+use OCP\App\IAppManager;
 use OCP\Encryption\IEncryptionModule;
 use OCP\IConfig;
+use OCP\IGroupManager;
 use OCP\IUser;
+use OCP\IUserManager;
 
 class Util {
 	public const HEADER_START = 'HBEGIN';
@@ -65,29 +68,23 @@ class Util {
 	/** @var array */
 	protected $ocHeaderKeys;
 
-	/** @var \OC\User\Manager */
-	protected $userManager;
-
 	/** @var IConfig */
 	protected $config;
 
 	/** @var array paths excluded from encryption */
 	protected $excludedPaths;
-
-	/** @var \OC\Group\Manager $manager */
-	protected $groupManager;
+	protected IGroupManager $groupManager;
+	protected IUserManager $userManager;
 
 	/**
 	 *
 	 * @param View $rootView
-	 * @param \OC\User\Manager $userManager
-	 * @param \OC\Group\Manager $groupManager
 	 * @param IConfig $config
 	 */
 	public function __construct(
 		View $rootView,
-		\OC\User\Manager $userManager,
-		\OC\Group\Manager $groupManager,
+		IUserManager $userManager,
+		IGroupManager $groupManager,
 		IConfig $config) {
 		$this->ocHeaderKeys = [
 			self::HEADER_ENCRYPTION_MODULE_KEY
@@ -275,7 +272,7 @@ class Util {
 		} else {
 			$result = array_merge($result, $users);
 
-			$groupManager = \OC::$server->getGroupManager();
+			$groupManager = $this->groupManager;
 			foreach ($groups as $group) {
 				$groupObject = $groupManager->get($group);
 				if ($groupObject) {
@@ -299,7 +296,8 @@ class Util {
 	 * @return boolean
 	 */
 	public function isSystemWideMountPoint($path, $uid) {
-		if (\OCP\App::isEnabled("files_external")) {
+		// No DI here as this initialise the db too soon
+		if (\OCP\Server::get(IAppManager::class)->isEnabledForUser("files_external")) {
 			/** @var GlobalStoragesService $storageService */
 			$storageService = \OC::$server->get(GlobalStoragesService::class);
 			$storages = $storageService->getAllStorages();
@@ -377,32 +375,29 @@ class Util {
 	}
 
 	/**
-	 * check if recovery key is enabled for user
-	 *
-	 * @param string $uid
-	 * @return boolean
+	 * Check if recovery key is enabled for user
 	 */
-	public function recoveryEnabled($uid) {
+	public function recoveryEnabled(string $uid): bool {
 		$enabled = $this->config->getUserValue($uid, 'encryption', 'recovery_enabled', '0');
 
 		return $enabled === '1';
 	}
 
 	/**
-	 * set new key storage root
+	 * Set new key storage root
 	 *
 	 * @param string $root new key store root relative to the data folder
 	 */
-	public function setKeyStorageRoot($root) {
+	public function setKeyStorageRoot(string $root): void {
 		$this->config->setAppValue('core', 'encryption_key_storage_root', $root);
 	}
 
 	/**
-	 * get key storage root
+	 * Get key storage root
 	 *
 	 * @return string key storage root
 	 */
-	public function getKeyStorageRoot() {
+	public function getKeyStorageRoot(): string {
 		return $this->config->getAppValue('core', 'encryption_key_storage_root', '');
 	}
 }
diff --git a/lib/private/Server.php b/lib/private/Server.php
index 842f72fa1d0..b473f4e75c0 100644
--- a/lib/private/Server.php
+++ b/lib/private/Server.php
@@ -353,7 +353,7 @@ class Server extends ServerContainer implements IServerContainer {
 			return new Profiler($c->get(SystemConfig::class));
 		});
 
-		$this->registerService(\OCP\Encryption\IManager::class, function (Server $c) {
+		$this->registerService(\OCP\Encryption\IManager::class, function (Server $c): Encryption\Manager {
 			$view = new View();
 			$util = new Encryption\Util(
 				$view,
diff --git a/lib/private/URLGenerator.php b/lib/private/URLGenerator.php
index 47979a038ba..6115d4a221e 100644
--- a/lib/private/URLGenerator.php
+++ b/lib/private/URLGenerator.php
@@ -42,6 +42,8 @@ namespace OC;
 
 use OC\Route\Router;
 use OCA\Theming\ThemingDefaults;
+use OCP\App\AppPathNotFoundException;
+use OCP\App\IAppManager;
 use OCP\ICacheFactory;
 use OCP\IConfig;
 use OCP\IRequest;
@@ -65,12 +67,14 @@ class URLGenerator implements IURLGenerator {
 	private $router;
 	/** @var null|string */
 	private $baseUrl = null;
+	private ?IAppManager $appManager = null;
 
 	public function __construct(IConfig $config,
 								IUserSession $userSession,
 								ICacheFactory $cacheFactory,
 								IRequest $request,
-								Router $router) {
+								Router $router
+	) {
 		$this->config = $config;
 		$this->userSession = $userSession;
 		$this->cacheFactory = $cacheFactory;
@@ -78,6 +82,14 @@ class URLGenerator implements IURLGenerator {
 		$this->router = $router;
 	}
 
+	private function getAppManager(): IAppManager {
+		if ($this->appManager !== null) {
+			return $this->appManager;
+		}
+		$this->appManager = \OCP\Server::get(IAppManager::class);
+		return $this->appManager;
+	}
+
 	/**
 	 * Creates an url using a defined route
 	 *
@@ -132,7 +144,7 @@ class URLGenerator implements IURLGenerator {
 		$frontControllerActive = ($this->config->getSystemValue('htaccess.IgnoreFrontController', false) === true || getenv('front_controller_active') === 'true');
 
 		if ($appName !== '') {
-			$app_path = \OC_App::getAppPath($appName);
+			$app_path = $this->getAppManager()->getAppPath($appName);
 			// Check if the app is in the app folder
 			if ($app_path && file_exists($app_path . '/' . $file)) {
 				if (substr($file, -3) === 'php') {
@@ -142,7 +154,7 @@ class URLGenerator implements IURLGenerator {
 					}
 					$urlLinkTo .= ($file !== 'index.php') ? '/' . $file : '';
 				} else {
-					$urlLinkTo = \OC_App::getAppWebPath($appName) . '/' . $file;
+					$urlLinkTo = $this->getAppManager()->getAppWebPath($appName) . '/' . $file;
 				}
 			} else {
 				$urlLinkTo = \OC::$WEBROOT . '/' . $appName . '/' . $file;
@@ -189,11 +201,20 @@ class URLGenerator implements IURLGenerator {
 		//if a theme has a png but not an svg always use the png
 		$basename = substr(basename($file), 0, -4);
 
-		$appPath = \OC_App::getAppPath($appName);
+		try {
+			$appPath = $this->getAppManager()->getAppPath($appName);
+		} catch (AppPathNotFoundException $e) {
+			if ($appName === 'core' || $appName === '') {
+				$appName = 'core';
+				$appPath = false;
+			} else {
+				throw new RuntimeException('image not found: image: ' . $file . ' webroot: ' . \OC::$WEBROOT . ' serverroot: ' . \OC::$SERVERROOT);
+			}
+		}
 
 		// Check if the app is in the app folder
 		$path = '';
-		$themingEnabled = $this->config->getSystemValue('installed', false) && \OCP\App::isEnabled('theming') && \OC_App::isAppLoaded('theming');
+		$themingEnabled = $this->config->getSystemValue('installed', false) && $this->getAppManager()->isEnabledForUser('theming');
 		$themingImagePath = false;
 		if ($themingEnabled) {
 			$themingDefaults = \OC::$server->getThemingDefaults();
@@ -220,10 +241,10 @@ class URLGenerator implements IURLGenerator {
 		} elseif ($themingEnabled && $themingImagePath) {
 			$path = $themingImagePath;
 		} elseif ($appPath && file_exists($appPath . "/img/$file")) {
-			$path = \OC_App::getAppWebPath($appName) . "/img/$file";
+			$path = $this->getAppManager()->getAppWebPath($appName) . "/img/$file";
 		} elseif ($appPath && !file_exists($appPath . "/img/$basename.svg")
 			&& file_exists($appPath . "/img/$basename.png")) {
-			$path = \OC_App::getAppWebPath($appName) . "/img/$basename.png";
+			$path = $this->getAppManager()->getAppWebPath($appName) . "/img/$basename.png";
 		} elseif (!empty($appName) and file_exists(\OC::$SERVERROOT . "/$appName/img/$file")) {
 			$path = \OC::$WEBROOT . "/$appName/img/$file";
 		} elseif (!empty($appName) and (!file_exists(\OC::$SERVERROOT . "/$appName/img/$basename.svg")
diff --git a/lib/private/Updater.php b/lib/private/Updater.php
index 2c06cffcb19..da989c4db91 100644
--- a/lib/private/Updater.php
+++ b/lib/private/Updater.php
@@ -378,7 +378,7 @@ class Updater extends BasicEmitter {
 		$appManager = \OC::$server->getAppManager();
 		foreach ($apps as $app) {
 			// check if the app is compatible with this version of Nextcloud
-			$info = OC_App::getAppInfo($app);
+			$info = $appManager->getAppInfo($app);
 			if ($info === null || !OC_App::isAppCompatible($version, $info)) {
 				if ($appManager->isShipped($app)) {
 					throw new \UnexpectedValueException('The files of the app "' . $app . '" were not correctly replaced before running the update');
diff --git a/lib/private/legacy/OC_App.php b/lib/private/legacy/OC_App.php
index 9fa13a56d38..482fc4e88e7 100644
--- a/lib/private/legacy/OC_App.php
+++ b/lib/private/legacy/OC_App.php
@@ -679,25 +679,6 @@ class OC_App {
 	}
 
 	/**
-	 * register an admin form to be shown
-	 *
-	 * @param string $app
-	 * @param string $page
-	 */
-	public static function registerAdmin(string $app, string $page) {
-		self::$adminForms[] = $app . '/' . $page . '.php';
-	}
-
-	/**
-	 * register a personal form to be shown
-	 * @param string $app
-	 * @param string $page
-	 */
-	public static function registerPersonal(string $app, string $page) {
-		self::$personalForms[] = $app . '/' . $page . '.php';
-	}
-
-	/**
 	 * @param array $entry
 	 * @deprecated 20.0.0 Please register your alternative login option using the registerAlternativeLogin() on the RegistrationContext in your Application class implementing the OCP\Authentication\IAlternativeLogin interface
 	 */
diff --git a/lib/public/App.php b/lib/public/App.php
deleted file mode 100644
index 5103e624316..00000000000
--- a/lib/public/App.php
+++ /dev/null
@@ -1,104 +0,0 @@
-<?php
-/**
- * @copyright Copyright (c) 2016, ownCloud, Inc.
- *
- * @author Bart Visscher <bartv@thisnet.nl>
- * @author Christoph Wurst <christoph@winzerhof-wurst.at>
- * @author Frank Karlitschek <frank@karlitschek.de>
- * @author Georg Ehrke <oc.list@georgehrke.com>
- * @author Joas Schilling <coding@schilljs.com>
- * @author Jörn Friedrich Dreyer <jfd@butonic.de>
- * @author Julius Härtl <jus@bitgrid.net>
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Robin McCorkell <robin@mccorkell.me.uk>
- * @author Roeland Jago Douma <roeland@famdouma.nl>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- *
- * @license AGPL-3.0
- *
- * This code is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License, version 3,
- * as published by the Free Software Foundation.
- *
- * 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, version 3,
- * along with this program. If not, see <http://www.gnu.org/licenses/>
- *
- */
-// use OCP namespace for all classes that are considered public.
-// This means that they should be used by apps instead of the internal ownCloud classes
-
-namespace OCP;
-
-/**
- * This class provides functions to manage apps in ownCloud
- * @since 4.0.0
- * @deprecated 14.0.0
- */
-class App {
-
-
-	/**
-	 * Register a Configuration Screen that should appear in the personal settings section.
-	 * @param string $app appid
-	 * @param string $page page to be included
-	 * @return void
-	 * @since 4.0.0
-	 * @deprecated 14.0.0 Use settings section in appinfo.xml to register personal admin sections
-	 */
-	public static function registerPersonal($app, $page) {
-		\OC_App::registerPersonal($app, $page);
-	}
-
-	/**
-	 * Register a Configuration Screen that should appear in the Admin section.
-	 * @param string $app string appid
-	 * @param string $page string page to be included
-	 * @return void
-	 * @since 4.0.0
-	 * @deprecated 14.0.0 Use settings section in appinfo.xml to register admin sections
-	 */
-	public static function registerAdmin($app, $page) {
-		\OC_App::registerAdmin($app, $page);
-	}
-
-	/**
-	 * Read app metadata from the info.xml file
-	 * @param string $app id of the app or the path of the info.xml file
-	 * @param boolean $path (optional)
-	 * @return array|null
-	 * @deprecated 14.0.0 ise \OC::$server->getAppManager()->getAppInfo($appId)
-	 * @since 4.0.0
-	 */
-	public static function getAppInfo($app, $path = false) {
-		return \OC_App::getAppInfo($app, $path);
-	}
-
-	/**
-	 * checks whether or not an app is enabled
-	 * @param string $app
-	 * @return boolean
-	 *
-	 * This function checks whether or not an app is enabled.
-	 * @since 4.0.0
-	 * @deprecated 13.0.0 use \OC::$server->getAppManager()->isEnabledForUser($appId)
-	 */
-	public static function isEnabled($app) {
-		return \OC::$server->getAppManager()->isEnabledForUser($app);
-	}
-
-	/**
-	 * Get the last version of the app from appinfo/info.xml
-	 * @param string $app
-	 * @return string
-	 * @since 4.0.0
-	 * @deprecated 14.0.0 use \OC::$server->getAppManager()->getAppVersion($appId)
-	 */
-	public static function getAppVersion($app) {
-		return \OC::$server->getAppManager()->getAppVersion($app);
-	}
-}
diff --git a/lib/public/App/IAppManager.php b/lib/public/App/IAppManager.php
index 7473b229427..e0b5c049290 100644
--- a/lib/public/App/IAppManager.php
+++ b/lib/public/App/IAppManager.php
@@ -36,6 +36,9 @@ use OCP\IUser;
 /**
  * Interface IAppManager
  *
+ * @warning This interface shouldn't be included with dependency injection in
+ *          classes used for installing Nextcloud.
+ *
  * @since 8.0.0
  */
 interface IAppManager {
diff --git a/lib/public/BackgroundJob.php b/lib/public/BackgroundJob.php
deleted file mode 100644
index 2be11ab0a6e..00000000000
--- a/lib/public/BackgroundJob.php
+++ /dev/null
@@ -1,45 +0,0 @@
-<?php
-/**
- * @copyright Copyright (c) 2016, ownCloud, Inc.
- *
- * @author Jakob Sack <mail@jakobsack.de>
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Robin Appelman <robin@icewind.nl>
- *
- * @license AGPL-3.0
- *
- * This code is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License, version 3,
- * as published by the Free Software Foundation.
- *
- * 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, version 3,
- * along with this program. If not, see <http://www.gnu.org/licenses/>
- *
- */
-namespace OCP;
-
-/**
- * @since 4.5.0
- * @deprecated 14.0.0
- */
-class BackgroundJob {
-	/**
-	 * @since 5.0.0
-	 * @deprecated 14.0.0
-	 */
-	public static function getExecutionType() {
-		return '';
-	}
-
-	/**
-	 * @since 5.0.0
-	 * @deprecated 14.0.0
-	 */
-	public static function setExecutionType($type) {
-	}
-}
diff --git a/tests/lib/Encryption/UtilTest.php b/tests/lib/Encryption/UtilTest.php
index 02155be11dd..248377fc698 100644
--- a/tests/lib/Encryption/UtilTest.php
+++ b/tests/lib/Encryption/UtilTest.php
@@ -8,6 +8,8 @@ use OCA\Files_External\Lib\StorageConfig;
 use OCA\Files_External\Service\GlobalStoragesService;
 use OCP\Encryption\IEncryptionModule;
 use OCP\IConfig;
+use OCP\IGroupManager;
+use OCP\IUserManager;
 use Test\TestCase;
 
 class UtilTest extends TestCase {
@@ -15,24 +17,21 @@ class UtilTest extends TestCase {
 	/**
 	 * block size will always be 8192 for a PHP stream
 	 * @see https://bugs.php.net/bug.php?id=21641
-	 * @var integer
 	 */
-	protected $headerSize = 8192;
+	protected int $headerSize = 8192;
 
 	/** @var \PHPUnit\Framework\MockObject\MockObject */
 	protected $view;
 
-	/** @var \PHPUnit\Framework\MockObject\MockObject */
+	/** @var \PHPUnit\Framework\MockObject\MockObject|IUserManager */
 	protected $userManager;
 
-	/** @var \PHPUnit\Framework\MockObject\MockObject */
+	/** @var \PHPUnit\Framework\MockObject\MockObject|IGroupManager */
 	protected $groupManager;
 
-	/** @var \PHPUnit\Framework\MockObject\MockObject */
+	/** @var \PHPUnit\Framework\MockObject\MockObject|IConfig */
 	private $config;
-
-	/** @var  \OC\Encryption\Util */
-	private $util;
+	private Util $util;
 
 	protected function setUp(): void {
 		parent::setUp();
@@ -40,17 +39,9 @@ class UtilTest extends TestCase {
 			->disableOriginalConstructor()
 			->getMock();
 
-		$this->userManager = $this->getMockBuilder('OC\User\Manager')
-			->disableOriginalConstructor()
-			->getMock();
-
-		$this->groupManager = $this->getMockBuilder('OC\Group\Manager')
-			->disableOriginalConstructor()
-			->getMock();
-
-		$this->config = $this->getMockBuilder(IConfig::class)
-			->disableOriginalConstructor()
-			->getMock();
+		$this->userManager = $this->createMock(IUserManager::class);
+		$this->groupManager = $this->createMock(IGroupManager::class);
+		$this->config = $this->createMock(IConfig::class);
 
 		$this->util = new Util(
 			$this->view,
diff --git a/tests/lib/UrlGeneratorTest.php b/tests/lib/UrlGeneratorTest.php
index 9e5795fc41e..7fdbb7fb37e 100644
--- a/tests/lib/UrlGeneratorTest.php
+++ b/tests/lib/UrlGeneratorTest.php
@@ -297,7 +297,7 @@ class UrlGeneratorTest extends \Test\TestCase {
 		$this->assertEquals('http://localhost' . \OC::$WEBROOT . $expectedPath, $this->urlGenerator->linkToDefaultPageUrl());
 	}
 
-	public function provideDefaultApps() {
+	public function provideDefaultApps(): array {
 		return [
 			// none specified, default to files
 			[
@@ -321,4 +321,18 @@ class UrlGeneratorTest extends \Test\TestCase {
 			],
 		];
 	}
+
+	public function imagePathProvider(): array {
+		return [
+			['core', 'favicon-mask.svg', \OC::$WEBROOT . '/core/img/favicon-mask.svg'],
+			['files', 'external.svg', \OC::$WEBROOT . '/apps/files/img/external.svg'],
+		];
+	}
+
+	/**
+	 * @dataProvider imagePathProvider
+	 */
+	public function testImagePath(string $appName, string $file, string $result): void {
+		$this->assertSame($result, $this->urlGenerator->imagePath($appName, $file));
+	}
 }