[stable6] fix(filepicker): only add current folder if pickable

lib/components/FilePicker/FilePicker.spec.ts

@@ -0,0 +1,99 @@
+/**
+ * SPDX-FileCopyrightText: 2026 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+import type { INode } from '@nextcloud/files'
+
+import { Folder } from '@nextcloud/files'
+import { shallowMount } from '@vue/test-utils'
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+import { ref, shallowRef } from 'vue'
+import FilePicker from './FilePicker.vue'
+
+const axios = vi.hoisted(() => ({
+	get: vi.fn(() => new Promise(() => {})),
+}))
+vi.mock('@nextcloud/axios', () => ({ default: axios }))
+
+// Shared state injected into the mocked `useDAVFiles` composable so we can
+// control the current folder without hitting WebDAV.
+const dav = vi.hoisted(() => ({
+	files: undefined as never,
+	folder: undefined as never,
+	isLoading: undefined as never,
+}))
+vi.mock('../../composables/dav.ts', () => ({
+	useDAVFiles: () => ({
+		files: dav.files,
+		folder: dav.folder,
+		isLoading: dav.isLoading,
+		loadFiles: vi.fn(),
+		createDirectory: vi.fn(),
+	}),
+}))
+
+const currentFolder = new Folder({
+	owner: null,
+	source: 'http://example.com/dav/folder',
+	root: '/',
+})
+
+describe('FilePicker', () => {
+	beforeEach(() => {
+		dav.files = shallowRef([]) as never
+		dav.folder = shallowRef(currentFolder) as never
+		dav.isLoading = ref(false) as never
+	})
+
+	afterEach(() => {
+		vi.clearAllMocks()
+	})
+
+	/**
+	 * Mount the FilePicker with a `buttons` factory that captures the nodes
+	 * that would be passed to the button callback.
+	 *
+	 * @param props Additional props for the FilePicker
+	 */
+	function mountWithButtonSpy(props: Record<string, unknown> = {}) {
+		// eslint-disable-next-line @typescript-eslint/no-unused-vars
+		const buttons = vi.fn((_nodes: INode[]) => [{
+			label: 'Pick',
+			callback: () => {},
+		}])
+
+		shallowMount(FilePicker, {
+			propsData: {
+				name: 'Test picker',
+				buttons,
+				...props,
+			},
+		})
+
+		// The last call reflects the current selection state
+		return buttons.mock.calls.at(-1)![0]
+	}
+
+	it('picks the current folder if directory picking is allowed and nothing is selected', () => {
+		const nodes = mountWithButtonSpy({ allowPickDirectory: true })
+		expect(nodes).toEqual([currentFolder])
+	})
+
+	it('picks the current folder if `canPickFn` allows it', () => {
+		const canPickFn = vi.fn(() => true)
+		const nodes = mountWithButtonSpy({ allowPickDirectory: true, canPickFn })
+
+		expect(canPickFn).toHaveBeenCalledWith(currentFolder)
+		expect(nodes).toEqual([currentFolder])
+	})
+
+	it('does not pick the current folder if `canPickFn` rejects it', () => {
+		const canPickFn = vi.fn(() => false)
+		const nodes = mountWithButtonSpy({ allowPickDirectory: true, canPickFn })
+
+		expect(canPickFn).toHaveBeenCalledWith(currentFolder)
+		// The unpickable folder must not be passed as a selected node
+		expect(nodes).toEqual([])
+	})
+})

lib/components/FilePicker/FilePicker.vue

@@ -157,6 +157,8 @@ const dialogButtons = computed(() => {
 	const nodes = selectedFiles.value.length === 0
 		&& props.allowPickDirectory
 		&& currentFolder.value
+		// either no canPickFn is provided or the current folder is pickable
+		&& (!props.canPickFn || props.canPickFn(currentFolder.value))
 		? [currentFolder.value]
 		: selectedFiles.value