Add a repair step to cleanup old theming cache

Signed-off-by: Christopher Ng <chrng8@gmail.com>

apps/theming/appinfo/info.xml

@@ -5,7 +5,7 @@
 	<name>Theming</name>
 	<summary>Adjust the Nextcloud theme</summary>
 	<description>Adjust the Nextcloud theme</description>
-	<version>2.1.0</version>
+	<version>2.1.1</version>
 	<licence>agpl</licence>
 	<author>Nextcloud</author>
 	<namespace>Theming</namespace>
@@ -33,6 +33,7 @@
 		</pre-migration>
 		<post-migration>
 			<step>OCA\Theming\Migration\InitBackgroundImagesMigration</step>
+			<step>OCA\Theming\Migration\CleanupOldCache</step>
 		</post-migration>
 	</repair-steps>
 

apps/theming/lib/Migration/CleanupOldCache.php

@@ -0,0 +1,76 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright 2022 Christopher Ng <chrng8@gmail.com>
+ *
+ * @author Christopher Ng <chrng8@gmail.com>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCA\Theming\Migration;
+
+use OCP\Files\IAppData;
+use OCP\Files\SimpleFS\ISimpleFolder;
+use OCP\IL10N;
+use OCP\Migration\IOutput;
+use OCP\Migration\IRepairStep;
+use Throwable;
+
+class CleanupOldCache implements IRepairStep {
+	private const CACHE_FOLDERS = [
+		'global',
+		'users',
+	];
+
+	private IAppData $appData;
+	private IL10N $l10n;
+
+	public function __construct(
+		IAppData $appData,
+		IL10N $l10n
+	) {
+		$this->appData = $appData;
+		$this->l10n = $l10n;
+	}
+
+	public function getName(): string {
+		return $this->l10n->t('Cleanup old theming cache');
+	}
+
+	public function run(IOutput $output): void {
+		$folders = array_filter(
+			$this->appData->getDirectoryListing(),
+			fn (ISimpleFolder $folder): bool => !in_array($folder->getName(), static::CACHE_FOLDERS, true),
+		);
+
+		$output->startProgress(count($folders));
+
+		foreach ($folders as $folder) {
+			try {
+				$folder->delete();
+			} catch (Throwable $e) {
+				$output->warning($this->l10n->t('Failed to delete folder: "%1$s", error: %2$s', [$folder->getName(), $e->getMessage()]));
+			}
+			$output->advance();
+		}
+
+		$output->finishProgress();
+	}
+}