From 85f5c55531d4baa31ef533615e42eb20a7a7aeaa Mon Sep 17 00:00:00 2001
From: Carl Schwan <carl@carlschwan.eu>
Date: Wed, 29 Jul 2026 13:46:07 +0200
Subject: [PATCH] feat(globalscale): Expose more configs

These are the configs used in a bunch of applications (e.g. user_saml
and user_oidc). Standarize them.

Signed-off-by: Carl Schwan <carl@carlschwan.eu>
---
 lib/private/GlobalScale/Config.php | 21 +++++++++++++++++++++
 lib/public/GlobalScale/IConfig.php | 30 ++++++++++++++++++++++++++++++
 2 files changed, 51 insertions(+)

diff --git a/lib/private/GlobalScale/Config.php b/lib/private/GlobalScale/Config.php
index 4319a2fbb4285..be35487f3c314 100644
--- a/lib/private/GlobalScale/Config.php
+++ b/lib/private/GlobalScale/Config.php
@@ -6,6 +6,7 @@
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
+
 namespace OC\GlobalScale;
 
 use OCP\IConfig;
@@ -34,4 +35,24 @@ public function onlyInternalFederation(): bool {
 
 		return $enabled === 'internal';
 	}
+
+	#[Override]
+	public function isPrimary(): bool {
+		return $this->isGlobalScaleEnabled()
+			&& ($this->config->getSystemValueString('gss.mode', 'slave') === 'master'
+				|| $this->config->getSystemValueString('gss.mode', 'slave') === 'primary');
+	}
+
+	#[Override]
+	public function isSecondary(): bool {
+		return $this->isGlobalScaleEnabled()
+			&& ($this->config->getSystemValueString('gss.mode', 'slave') === 'slave'
+				|| $this->config->getSystemValueString('gss.mode', 'slave') === 'secondary');
+	}
+
+	#[Override]
+	public function isPrimaryAdmin(string $userId): bool {
+		return in_array($userId, $this->config->getSystemValue('gss.master.admin', []))
+			|| in_array($userId, $this->config->getSystemValue('gss.primary.admin', []));
+	}
 }
diff --git a/lib/public/GlobalScale/IConfig.php b/lib/public/GlobalScale/IConfig.php
index 38efce4b8b55e..bd71adbed0c20 100644
--- a/lib/public/GlobalScale/IConfig.php
+++ b/lib/public/GlobalScale/IConfig.php
@@ -4,6 +4,7 @@
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
+
 namespace OCP\GlobalScale;
 
 use OCP\AppFramework\Attribute\Consumable;
@@ -30,4 +31,33 @@ public function isGlobalScaleEnabled(): bool;
 	 * @since 12.0.1
 	 */
 	public function onlyInternalFederation(): bool;
+
+	/**
+	 * Check if the current instance is the primary instance.
+	 *
+	 * This instance is then only used to log in the users and then redirect them
+	 * to their associated secondary instance.
+	 *
+	 * @since 34.0.3
+	 */
+	public function isPrimary(): bool;
+
+	/**
+	 * Check if the current instance is one of the secondary instance.
+	 *
+	 * These instances are the actual instance of a user and hold all their data.
+	 *
+	 * @since 34.0.3
+	 */
+	public function isSecondary(): bool;
+
+	/**
+	 * Check if the given user is one of the admin on the primary instance.
+	 *
+	 * These users won't be redirected to a secondary instance and instead will
+	 * stay on the primary instance to manage the configuration of the instance.
+	 *
+	 * @since 34.0.3
+	 */
+	public function isPrimaryAdmin(string $userId): bool;
 }