feat(files): Add capability for clients to check WCF state

apps/files/composer/composer/autoload_classmap.php

@@ -16,6 +16,7 @@
     'OCA\\Files\\Activity\\Settings\\FileActivitySettings' => $baseDir . '/../lib/Activity/Settings/FileActivitySettings.php',
     'OCA\\Files\\Activity\\Settings\\FileChanged' => $baseDir . '/../lib/Activity/Settings/FileChanged.php',
     'OCA\\Files\\Activity\\Settings\\FileFavoriteChanged' => $baseDir . '/../lib/Activity/Settings/FileFavoriteChanged.php',
+    'OCA\\Files\\AdvancedCapabilities' => $baseDir . '/../lib/AdvancedCapabilities.php',
     'OCA\\Files\\App' => $baseDir . '/../lib/App.php',
     'OCA\\Files\\AppInfo\\Application' => $baseDir . '/../lib/AppInfo/Application.php',
     'OCA\\Files\\BackgroundJob\\CleanupDirectEditingTokens' => $baseDir . '/../lib/BackgroundJob/CleanupDirectEditingTokens.php',

apps/files/composer/composer/autoload_static.php

@@ -31,6 +31,7 @@ class ComposerStaticInitFiles
         'OCA\\Files\\Activity\\Settings\\FileActivitySettings' => __DIR__ . '/..' . '/../lib/Activity/Settings/FileActivitySettings.php',
         'OCA\\Files\\Activity\\Settings\\FileChanged' => __DIR__ . '/..' . '/../lib/Activity/Settings/FileChanged.php',
         'OCA\\Files\\Activity\\Settings\\FileFavoriteChanged' => __DIR__ . '/..' . '/../lib/Activity/Settings/FileFavoriteChanged.php',
+        'OCA\\Files\\AdvancedCapabilities' => __DIR__ . '/..' . '/../lib/AdvancedCapabilities.php',
         'OCA\\Files\\App' => __DIR__ . '/..' . '/../lib/App.php',
         'OCA\\Files\\AppInfo\\Application' => __DIR__ . '/..' . '/../lib/AppInfo/Application.php',
         'OCA\\Files\\BackgroundJob\\CleanupDirectEditingTokens' => __DIR__ . '/..' . '/../lib/BackgroundJob/CleanupDirectEditingTokens.php',

apps/files/lib/AdvancedCapabilities.php

@@ -0,0 +1,38 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+namespace OCA\Files;
+
+use OCA\Files\Service\SettingsService;
+use OCP\Capabilities\ICapability;
+use OCP\Capabilities\IInitialStateExcludedCapability;
+
+/**
+ * Capabilities not needed for every request.
+ * This capabilities might be hard to compute or no used by the webui.
+ */
+class AdvancedCapabilities implements ICapability, IInitialStateExcludedCapability {
+
+	public function __construct(
+		protected SettingsService $service,
+	) {
+	}
+
+	/**
+	 * Return this classes capabilities
+	 *
+	 * @return array{files: array{'windows_compatible_filenames': bool}}
+	 */
+	public function getCapabilities(): array {
+		return [
+			'files' => [
+				'windows_compatible_filenames' => $this->service->hasFilesWindowsSupport(),
+			],
+		];
+	}
+}

apps/files/lib/AppInfo/Application.php

@@ -9,6 +9,7 @@
 namespace OCA\Files\AppInfo;
 
 use Closure;
+use OCA\Files\AdvancedCapabilities;
 use OCA\Files\Capabilities;
 use OCA\Files\Collaboration\Resources\Listener;
 use OCA\Files\Collaboration\Resources\ResourceProvider;
@@ -107,6 +108,7 @@ public function register(IRegistrationContext $context): void {
 		 * Register capabilities
 		 */
 		$context->registerCapability(Capabilities::class);
+		$context->registerCapability(AdvancedCapabilities::class);
 		$context->registerCapability(DirectEditingCapabilities::class);
 
 		$context->registerDeclarativeSettings(DeclarativeAdminSettings::class);

apps/files/openapi.json

@@ -29,6 +29,7 @@
                     "files": {
                         "type": "object",
                         "required": [
+                            "windows_compatible_filenames",
                             "$comment",
                             "bigfilechunking",
                             "blacklisted_files",
@@ -41,6 +42,9 @@
                             "directEditing"
                         ],
                         "properties": {
+                            "windows_compatible_filenames": {
+                                "type": "boolean"
+                            },
                             "$comment": {
                                 "type": "string",
                                 "nullable": true

apps/files/tests/AdvancedCapabilitiesTest.php

@@ -0,0 +1,47 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+namespace OCA\Files;
+
+use OCA\Files\Service\SettingsService;
+use PHPUnit\Framework\MockObject\MockObject;
+use Test\TestCase;
+
+class AdvancedCapabilitiesTest extends TestCase {
+
+	protected SettingsService&MockObject $service;
+	protected AdvancedCapabilities $capabilities;
+
+	protected function setUp(): void {
+		$this->service = $this->createMock(SettingsService::class);
+		$this->capabilities = new AdvancedCapabilities($this->service);
+	}
+
+	/**
+	 * @dataProvider dataGetCapabilities
+	 */
+	public function testGetCapabilities(bool $wcf): void {
+		$this->service
+			->expects(self::once())
+			->method('hasFilesWindowsSupport')
+			->willReturn($wcf);
+
+		self::assertEqualsCanonicalizing(['files' => [ 'windows_compatible_filenames' => $wcf ]], $this->capabilities->getCapabilities());
+	}
+
+	public static function dataGetCapabilities(): array {
+		return [
+			'WCF enabled' => [
+				true,
+			],
+			'WCF disabled' => [
+				false,
+			],
+		];
+	}
+}