3 files changed, 121 insertions, 0 deletions
diff --git a/apps/files_external/src/utils/credentialsUtils.ts b/apps/files_external/src/utils/credentialsUtils.ts
new file mode 100644
index 00000000000..5c19c7bce44
--- /dev/null
+++ b/apps/files_external/src/utils/credentialsUtils.ts
@@ -0,0 +1,25 @@
+/**
+ * SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+import type { StorageConfig } from '../services/externalStorage'
+
+// @see https://github.com/nextcloud/server/blob/ac2bc2384efe3c15ff987b87a7432bc60d545c67/lib/public/Files/StorageNotAvailableException.php#L41
+export enum STORAGE_STATUS {
+	SUCCESS = 0,
+	ERROR = 1,
+	INDETERMINATE = 2,
+	INCOMPLETE_CONF = 3,
+	UNAUTHORIZED = 4,
+	TIMEOUT = 5,
+	NETWORK_ERROR = 6,
+}
+
+export const isMissingAuthConfig = function(config: StorageConfig) {
+	// If we don't know the status, assume it is ok
+	if (!config.status || config.status === STORAGE_STATUS.SUCCESS) {
+		return false
+	}
+
+	return config.userProvided || config.authMechanism === 'password::global::user'
+}
diff --git a/apps/files_external/src/utils/externalStorageUtils.spec.ts b/apps/files_external/src/utils/externalStorageUtils.spec.ts
new file mode 100644
index 00000000000..a6a29e27a7c
--- /dev/null
+++ b/apps/files_external/src/utils/externalStorageUtils.spec.ts
@@ -0,0 +1,74 @@
+/**
+ * SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+import { File, Folder, Permission } from '@nextcloud/files'
+import { describe, expect, test } from 'vitest'
+import { isNodeExternalStorage } from './externalStorageUtils'
+
+describe('Is node an external storage', () => {
+	test('A Folder with a backend and a valid scope is an external storage', () => {
+		const folder = new Folder({
+			id: 1,
+			source: 'https://cloud.domain.com/remote.php/dav/files/admin/Foo/',
+			owner: 'admin',
+			permissions: Permission.ALL,
+			attributes: {
+				scope: 'personal',
+				backend: 'SFTP',
+			},
+		})
+		expect(isNodeExternalStorage(folder)).toBe(true)
+	})
+
+	test('a File is not a valid storage', () => {
+		const file = new File({
+			id: 1,
+			source: 'https://cloud.domain.com/remote.php/dav/files/admin/foobar.txt',
+			owner: 'admin',
+			mime: 'text/plain',
+			permissions: Permission.ALL,
+		})
+		expect(isNodeExternalStorage(file)).toBe(false)
+	})
+
+	test('A Folder without a backend is not a storage', () => {
+		const folder = new Folder({
+			id: 1,
+			source: 'https://cloud.domain.com/remote.php/dav/files/admin/Foo/',
+			owner: 'admin',
+			permissions: Permission.ALL,
+			attributes: {
+				scope: 'personal',
+			},
+		})
+		expect(isNodeExternalStorage(folder)).toBe(false)
+	})
+
+	test('A Folder without a scope is not a storage', () => {
+		const folder = new Folder({
+			id: 1,
+			source: 'https://cloud.domain.com/remote.php/dav/files/admin/Foo/',
+			owner: 'admin',
+			permissions: Permission.ALL,
+			attributes: {
+				backend: 'SFTP',
+			},
+		})
+		expect(isNodeExternalStorage(folder)).toBe(false)
+	})
+
+	test('A Folder with an invalid scope is not a storage', () => {
+		const folder = new Folder({
+			id: 1,
+			source: 'https://cloud.domain.com/remote.php/dav/files/admin/Foo/',
+			owner: 'admin',
+			permissions: Permission.ALL,
+			attributes: {
+				scope: 'null',
+				backend: 'SFTP',
+			},
+		})
+		expect(isNodeExternalStorage(folder)).toBe(false)
+	})
+})
diff --git a/apps/files_external/src/utils/externalStorageUtils.ts b/apps/files_external/src/utils/externalStorageUtils.ts
new file mode 100644
index 00000000000..4407def5ce7
--- /dev/null
+++ b/apps/files_external/src/utils/externalStorageUtils.ts
@@ -0,0 +1,22 @@
+/**
+ * SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+import { FileType, Node } from '@nextcloud/files'
+import type { MountEntry } from '../services/externalStorage'
+
+export const isNodeExternalStorage = function(node: Node) {
+	// Not a folder, not a storage
+	if (node.type === FileType.File) {
+		 return false
+	}
+
+	// No backend or scope, not a storage
+	const attributes = node.attributes as MountEntry
+	if (!attributes.scope || !attributes.backend) {
+		return false
+	}
+
+	// Specific markers that we're sure are ext storage only
+	return attributes.scope === 'personal' || attributes.scope === 'system'
+}