Basic support for Nextcloud 31

NC 31 has removed the method Server::getLogger() as well as all methods from
the ILogger interface. The new alternative for this has existed since NC 20
but it's not there in ownCloud. Hence, we need to be prepared to two
different environments.

With this change, at least the basic functionality of the Music app works.
Everything has not been tested yet.

CHANGELOG.md

@@ -1,6 +1,7 @@
 ## [Unreleased]
 
 ### Added
+- Support for Nextcloud 31
 
 ### Changed
 

appinfo/info.xml

@@ -33,7 +33,7 @@
 	<dependencies>
 		<php min-version="7.4" max-version="8.3"/>
 		<owncloud min-version="10.5" max-version="10" />
-		<nextcloud min-version="20" max-version="30" />
+		<nextcloud min-version="20" max-version="31" />
 	</dependencies>
 	<types>
 		<!-- update metadata cache when create/update/delete a file -->

lib/AppFramework/Core/Logger.php

@@ -10,18 +10,20 @@
  * @author Pauli Järvinen <pauli.jarvinen@gmail.com>
  * @copyright Alessandro Cosentino 2012
  * @copyright Bernhard Posselt 2012, 2014
- * @copyright Pauli Järvinen 2018 - 2024
+ * @copyright Pauli Järvinen 2018 - 2025
  */
 
 namespace OCA\Music\AppFramework\Core;
 
-use OCP\ILogger;
-
 class Logger {
 	protected string $appName;
-	protected ILogger $logger;
+	/** @var \OCP\ILogger|\Psr\Log\LoggerInterface $logger */
+	protected $logger;
 
-	public function __construct(string $appName, ILogger $logger) {
+	/**
+	 * @param \OCP\ILogger|\Psr\Log\LoggerInterface $logger
+	 */
+	public function __construct(string $appName, $logger) {
 		$this->appName = $appName;
 		$this->logger = $logger;
 	}

lib/AppInfo/Application.php

@@ -9,7 +9,7 @@
  * @author Morris Jobke <hey@morrisjobke.de>
  * @author Pauli Järvinen <pauli.jarvinen@gmail.com>
  * @copyright Morris Jobke 2014
- * @copyright Pauli Järvinen 2017 - 2024
+ * @copyright Pauli Järvinen 2017 - 2025
  */
 
 namespace OCA\Music\AppInfo;
@@ -563,9 +563,15 @@ private function registerServices($context) : void {
 		});
 
 		$context->registerService('Logger', function (IAppContainer $c) {
+			// NC 31 removed the getLogger method but the Psr alternative is not available on OC
+			if (\method_exists($c->getServer(), 'getLogger')) {
+				$innerLogger = $c->getServer()->getLogger();
+			} else {
+				$innerLogger = $c->query(\Psr\Log\LoggerInterface::class);
+			}
 			return new Logger(
 				$c->query('AppName'),
-				$c->getServer()->getLogger()
+				$innerLogger
 			);
 		});