1 files changed, 98 insertions, 0 deletions
diff --git a/apps/settings/lib/SetupChecks/MemcacheConfigured.php b/apps/settings/lib/SetupChecks/MemcacheConfigured.php
new file mode 100644
index 00000000000..e3601d428bb
--- /dev/null
+++ b/apps/settings/lib/SetupChecks/MemcacheConfigured.php
@@ -0,0 +1,98 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+namespace OCA\Settings\SetupChecks;
+
+use OC\Memcache\Memcached;
+use OCP\ICacheFactory;
+use OCP\IConfig;
+use OCP\IL10N;
+use OCP\IURLGenerator;
+use OCP\SetupCheck\ISetupCheck;
+use OCP\SetupCheck\SetupResult;
+
+class MemcacheConfigured implements ISetupCheck {
+	public function __construct(
+		private IL10N $l10n,
+		private IConfig $config,
+		private IURLGenerator $urlGenerator,
+		private ICacheFactory $cacheFactory,
+	) {
+	}
+
+	public function getName(): string {
+		return $this->l10n->t('Memcache');
+	}
+
+	public function getCategory(): string {
+		return 'system';
+	}
+
+	public function run(): SetupResult {
+		$memcacheDistributedClass = $this->config->getSystemValue('memcache.distributed', null);
+		$memcacheLockingClass = $this->config->getSystemValue('memcache.locking', null);
+		$memcacheLocalClass = $this->config->getSystemValue('memcache.local', null);
+		$caches = array_filter([$memcacheDistributedClass,$memcacheLockingClass,$memcacheLocalClass]);
+		if (in_array(Memcached::class, array_map(fn (string $class) => ltrim($class, '\\'), $caches))) {
+			// wrong PHP module is installed
+			if (extension_loaded('memcache') && !extension_loaded('memcached')) {
+				return SetupResult::warning(
+					$this->l10n->t('Memcached is configured as distributed cache, but the wrong PHP module ("memcache") is installed. Please install the PHP module "memcached".')
+				);
+			}
+			// required PHP module is missing
+			if (!extension_loaded('memcached')) {
+				return SetupResult::warning(
+					$this->l10n->t('Memcached is configured as distributed cache, but the PHP module "memcached" is not installed. Please install the PHP module "memcached".')
+				);
+			}
+		}
+		if ($memcacheLocalClass === null) {
+			return SetupResult::info(
+				$this->l10n->t('No memory cache has been configured. To enhance performance, please configure a memcache, if available.'),
+				$this->urlGenerator->linkToDocs('admin-performance')
+			);
+		}
+
+		if ($this->cacheFactory->isLocalCacheAvailable()) {
+			$random = bin2hex(random_bytes(64));
+			$local = $this->cacheFactory->createLocal('setupcheck.local');
+			try {
+				$local->set('test', $random);
+				$local2 = $this->cacheFactory->createLocal('setupcheck.local');
+				$actual = $local2->get('test');
+				$local->remove('test');
+			} catch (\Throwable) {
+				$actual = null;
+			}
+
+			if ($actual !== $random) {
+				return SetupResult::error($this->l10n->t('Failed to write and read a value from local cache.'));
+			}
+		}
+
+		if ($this->cacheFactory->isAvailable()) {
+			$random = bin2hex(random_bytes(64));
+			$distributed = $this->cacheFactory->createDistributed('setupcheck');
+			try {
+				$distributed->set('test', $random);
+				$distributed2 = $this->cacheFactory->createDistributed('setupcheck');
+				$actual = $distributed2->get('test');
+				$distributed->remove('test');
+			} catch (\Throwable) {
+				$actual = null;
+			}
+
+			if ($actual !== $random) {
+				return SetupResult::error($this->l10n->t('Failed to write and read a value from distributed cache.'));
+			}
+		}
+
+		return SetupResult::success($this->l10n->t('Configured'));
+	}
+}