chore: admin folder structure (#8632)

* chore: admin folder structure

* fix: copy right check and formatting

* fix: types

apps/admin/helpers/authentication.ts

@@ -0,0 +1,36 @@
+/**
+ * Copyright (c) 2023-present Plane Software, Inc. and contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ * See the LICENSE file for details.
+ */
+
+import type {
+  IFormattedInstanceConfiguration,
+  TInstanceAuthenticationModes,
+  TInstanceConfigurationKeys,
+} from "@plane/types";
+
+/**
+ * Checks if a given authentication method can be disabled.
+ * @param configKey - The configuration key to check.
+ * @param authModes - The authentication modes to check.
+ * @param formattedConfig - The formatted configuration to check.
+ * @returns True if the authentication method can be disabled, false otherwise.
+ */
+export const canDisableAuthMethod = (
+  configKey: TInstanceConfigurationKeys,
+  authModes: TInstanceAuthenticationModes[],
+  formattedConfig: IFormattedInstanceConfiguration | undefined
+): boolean => {
+  // Count currently enabled methods
+  const enabledCount = authModes.reduce((count, method) => {
+    const enabledKey = method.enabledConfigKey;
+    if (!enabledKey || !formattedConfig) return count;
+    const isEnabled = Boolean(parseInt(formattedConfig[enabledKey] ?? "0"));
+    return isEnabled ? count + 1 : count;
+  }, 0);
+
+  // If trying to disable and only 1 method is enabled, prevent it
+  const isCurrentlyEnabled = Boolean(parseInt(formattedConfig?.[configKey] ?? "0"));
+  return !(isCurrentlyEnabled && enabledCount === 1);
+};