1 files changed, 46 insertions, 0 deletions
diff --git a/apps/settings/lib/SetupChecks/MysqlUnicodeSupport.php b/apps/settings/lib/SetupChecks/MysqlUnicodeSupport.php
new file mode 100644
index 00000000000..ba2fa93e094
--- /dev/null
+++ b/apps/settings/lib/SetupChecks/MysqlUnicodeSupport.php
@@ -0,0 +1,46 @@
+<?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 OCP\IConfig;
+use OCP\IL10N;
+use OCP\IURLGenerator;
+use OCP\SetupCheck\ISetupCheck;
+use OCP\SetupCheck\SetupResult;
+
+class MysqlUnicodeSupport implements ISetupCheck {
+	public function __construct(
+		private IL10N $l10n,
+		private IConfig $config,
+		private IURLGenerator $urlGenerator,
+	) {
+	}
+
+	public function getName(): string {
+		return $this->l10n->t('MySQL Unicode support');
+	}
+
+	public function getCategory(): string {
+		return 'database';
+	}
+
+	public function run(): SetupResult {
+		if ($this->config->getSystemValueString('dbtype') !== 'mysql') {
+			return SetupResult::success($this->l10n->t('You are not using MySQL'));
+		}
+		if ($this->config->getSystemValueBool('mysql.utf8mb4', false)) {
+			return SetupResult::success($this->l10n->t('MySQL is used as database and does support 4-byte characters'));
+		} else {
+			return SetupResult::warning(
+				$this->l10n->t('MySQL is used as database but does not support 4-byte characters. To be able to handle 4-byte characters (like emojis) without issues in filenames or comments for example it is recommended to enable the 4-byte support in MySQL.'),
+				$this->urlGenerator->linkToDocs('admin-mysql-utf8mb4'),
+			);
+		}
+	}
+}