From 3fabc4f7336bbf93d65acc918e1300616091dd54 Mon Sep 17 00:00:00 2001
From: Christopher Ng <chrng8@gmail.com>
Date: Tue, 30 Jul 2024 18:19:55 -0700
Subject: [PATCH] feat: Navigate via folder tree

Signed-off-by: Christopher Ng <chrng8@gmail.com>
---
 apps/files/src/components/BreadCrumbs.vue     |  17 +-
 .../components/FileEntry/FileEntryName.vue    |   5 +
 .../src/components/FilesNavigationItem.vue    | 170 ++++++++++++++++++
 apps/files/src/composables/useNavigation.ts   |   4 +-
 apps/files/src/eventbus.d.ts                  |   5 +
 apps/files/src/init.ts                        |   2 +
 apps/files/src/services/FolderTree.ts         |  90 ++++++++++
 apps/files/src/views/Navigation.vue           | 127 ++++---------
 apps/files/src/views/folderTree.ts            | 147 +++++++++++++++
 9 files changed, 469 insertions(+), 98 deletions(-)
 create mode 100644 apps/files/src/components/FilesNavigationItem.vue
 create mode 100644 apps/files/src/services/FolderTree.ts
 create mode 100644 apps/files/src/views/folderTree.ts

diff --git a/apps/files/src/components/BreadCrumbs.vue b/apps/files/src/components/BreadCrumbs.vue
index d93330e1d29..21777562d18 100644
--- a/apps/files/src/components/BreadCrumbs.vue
+++ b/apps/files/src/components/BreadCrumbs.vue
@@ -109,12 +109,11 @@ export default defineComponent({
 			return this.dirs.map((dir: string, index: number) => {
 				const source = this.getFileSourceFromPath(dir)
 				const node: Node | undefined = source ? this.getNodeFromSource(source) : undefined
-				const to = { ...this.$route, params: { node: node?.fileid }, query: { dir } }
 				return {
 					dir,
 					exact: true,
 					name: this.getDirDisplayName(dir),
-					to,
+					to: this.getTo(dir, node),
 					// disable drop on current directory
 					disableDrop: index === this.dirs.length - 1,
 				}
@@ -163,6 +162,20 @@ export default defineComponent({
 			return node?.displayname || basename(path)
 		},
 
+		getTo(dir: string, node?: Node): Record<string, unknown> {
+			if (node === undefined) {
+				return {
+					...this.$route,
+					query: { dir },
+				}
+			}
+			return {
+				...this.$route,
+				params: { fileid: String(node.fileid) },
+				query: { dir: node.path },
+			}
+		},
+
 		onClick(to) {
 			if (to?.query?.dir === this.$route.query.dir) {
 				this.$emit('reload')
diff --git a/apps/files/src/components/FileEntry/FileEntryName.vue b/apps/files/src/components/FileEntry/FileEntryName.vue
index 1d45f7de17e..439037b984e 100644
--- a/apps/files/src/components/FileEntry/FileEntryName.vue
+++ b/apps/files/src/components/FileEntry/FileEntryName.vue
@@ -45,6 +45,7 @@ import { showError, showSuccess } from '@nextcloud/dialogs'
 import { emit } from '@nextcloud/event-bus'
 import { FileType, NodeStatus } from '@nextcloud/files'
 import { translate as t } from '@nextcloud/l10n'
+import { dirname } from '@nextcloud/paths'
 import { defineComponent, inject } from 'vue'
 
 import NcTextField from '@nextcloud/vue/dist/Components/NcTextField.js'
@@ -269,6 +270,10 @@ export default defineComponent({
 				// Success 🎉
 				emit('files:node:updated', this.source)
 				emit('files:node:renamed', this.source)
+				emit('files:node:moved', {
+					node: this.source,
+					oldSource: `${dirname(this.source.source)}/${oldName}`,
+				})
 				showSuccess(t('files', 'Renamed "{oldName}" to "{newName}"', { oldName, newName }))
 
 				// Reset the renaming store
diff --git a/apps/files/src/components/FilesNavigationItem.vue b/apps/files/src/components/FilesNavigationItem.vue
new file mode 100644
index 00000000000..75507803957
--- /dev/null
+++ b/apps/files/src/components/FilesNavigationItem.vue
@@ -0,0 +1,170 @@
+<!--
+  - SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+  - SPDX-License-Identifier: AGPL-3.0-or-later
+-->
+
+<template>
+	<Fragment>
+		<NcAppNavigationItem v-for="view in currentViews"
+			:key="view.id"
+			class="files-navigation__item"
+			allow-collapse
+			:data-cy-files-navigation-item="view.id"
+			:exact="useExactRouteMatching(view)"
+			:icon="view.iconClass"
+			:name="view.name"
+			:open="isExpanded(view)"
+			:pinned="view.sticky"
+			:to="generateToNavigation(view)"
+			:style="style"
+			@update:open="onToggleExpand(view)">
+			<template v-if="view.icon" #icon>
+				<NcIconSvgWrapper :svg="view.icon" />
+			</template>
+
+			<!-- Recursively nest child views -->
+			<FilesNavigationItem v-if="hasChildViews(view)"
+				:parent="view"
+				:level="level + 1"
+				:views="filterView(views, parent.id)" />
+		</NcAppNavigationItem>
+	</Fragment>
+</template>
+
+<script lang="ts">
+import type { PropType } from 'vue'
+import type { View } from '@nextcloud/files'
+
+import { defineComponent } from 'vue'
+import { Fragment } from 'vue-frag'
+
+import NcAppNavigationItem from '@nextcloud/vue/dist/Components/NcAppNavigationItem.js'
+import NcIconSvgWrapper from '@nextcloud/vue/dist/Components/NcIconSvgWrapper.js'
+
+import { useNavigation } from '../composables/useNavigation.js'
+import { useViewConfigStore } from '../store/viewConfig.js'
+
+const maxLevel = 7 // Limit nesting to not exceed max call stack size
+
+export default defineComponent({
+	name: 'FilesNavigationItem',
+
+	components: {
+		Fragment,
+		NcAppNavigationItem,
+		NcIconSvgWrapper,
+	},
+
+	props: {
+		parent: {
+			type: Object as PropType<View>,
+			default: () => ({}),
+		},
+		level: {
+			type: Number,
+			default: 0,
+		},
+		views: {
+			type: Object as PropType<Record<string, View[]>>,
+			default: () => ({}),
+		},
+	},
+
+	setup() {
+		const { currentView } = useNavigation()
+		const viewConfigStore = useViewConfigStore()
+		return {
+			currentView,
+			viewConfigStore,
+		}
+	},
+
+	computed: {
+		currentViews(): View[] {
+			if (this.level >= maxLevel) { // Filter for all remaining decendants beyond the max level
+				return (Object.values(this.views).reduce((acc, views) => [...acc, ...views], []) as View[])
+					.filter(view => view.params?.dir.startsWith(this.parent.params?.dir))
+			}
+			return this.views[this.parent.id] ?? [] // Root level views have `undefined` parent ids
+		},
+
+		style() {
+			if (this.level === 0 || this.level === 1 || this.level > maxLevel) { // Left-align deepest entry with center of app navigation, do not add any more visual indentation after this level
+				return null
+			}
+			return {
+				'padding-left': '16px',
+			}
+		},
+	},
+
+	methods: {
+		hasChildViews(view: View): boolean {
+			if (this.level >= maxLevel) {
+				return false
+			}
+			return this.views[view.id]?.length > 0
+		},
+
+		/**
+		 * Only use exact route matching on routes with child views
+		 * Because if a view does not have children (like the files view) then multiple routes might be matched for it
+		 * Like for the 'files' view this does not work because of optional 'fileid' param so /files and /files/1234 are both in the 'files' view
+		 * @param view The view to check
+		 */
+		useExactRouteMatching(view: View): boolean {
+			return this.hasChildViews(view)
+		},
+
+		/**
+		 * Generate the route to a view
+		 * @param view View to generate "to" navigation for
+		 */
+		generateToNavigation(view: View) {
+			if (view.params) {
+				const { dir } = view.params
+				return { name: 'filelist', params: { ...view.params }, query: { dir } }
+			}
+			return { name: 'filelist', params: { view: view.id } }
+		},
+
+		/**
+		 * Check if a view is expanded by user config
+		 * or fallback to the default value.
+		 * @param view View to check if expanded
+		 */
+		isExpanded(view: View): boolean {
+			return typeof this.viewConfigStore.getConfig(view.id)?.expanded === 'boolean'
+				? this.viewConfigStore.getConfig(view.id).expanded === true
+				: view.expanded === true
+		},
+
+		/**
+		 * Expand/collapse a a view with children and permanently
+		 * save this setting in the server.
+		 * @param view View to toggle
+		 */
+		onToggleExpand(view: View) {
+			// Invert state
+			const isExpanded = this.isExpanded(view)
+			// Update the view expanded state, might not be necessary
+			view.expanded = !isExpanded
+			this.viewConfigStore.update(view.id, 'expanded', !isExpanded)
+		},
+
+		/**
+		 * Return the view map with the specified view id removed
+		 *
+		 * @param viewMap Map of views
+		 * @param id View id
+		 */
+		filterView(viewMap: Record<string, View[]>, id: string): Record<string, View[]> {
+			return Object.fromEntries(
+				Object.entries(viewMap)
+					// eslint-disable-next-line @typescript-eslint/no-unused-vars
+					.filter(([viewId, _views]) => viewId !== id),
+			)
+		},
+	},
+})
+</script>
diff --git a/apps/files/src/composables/useNavigation.ts b/apps/files/src/composables/useNavigation.ts
index f410aec895f..2fff5633e23 100644
--- a/apps/files/src/composables/useNavigation.ts
+++ b/apps/files/src/composables/useNavigation.ts
@@ -3,9 +3,10 @@
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
 import type { View } from '@nextcloud/files'
+import type { ShallowRef } from 'vue'
 
 import { getNavigation } from '@nextcloud/files'
-import { onMounted, onUnmounted, shallowRef, type ShallowRef } from 'vue'
+import { onMounted, onUnmounted, shallowRef, triggerRef } from 'vue'
 
 /**
  * Composable to get the currently active files view from the files navigation
@@ -28,6 +29,7 @@ export function useNavigation() {
 	 */
 	function onUpdateViews() {
 		views.value = navigation.views
+		triggerRef(views)
 	}
 
 	onMounted(() => {
diff --git a/apps/files/src/eventbus.d.ts b/apps/files/src/eventbus.d.ts
index db90c40eeae..e1fd8c73b4b 100644
--- a/apps/files/src/eventbus.d.ts
+++ b/apps/files/src/eventbus.d.ts
@@ -11,7 +11,12 @@ declare module '@nextcloud/event-bus' {
 
 		'files:favorites:removed': Node
 		'files:favorites:added': Node
+
+		'files:node:created': Node
+		'files:node:deleted': Node
+		'files:node:updated': Node
 		'files:node:renamed': Node
+		'files:node:moved': { node: Node, oldSource: string }
 
 		'files:filter:added': IFileListFilter
 		'files:filter:removed': string
diff --git a/apps/files/src/init.ts b/apps/files/src/init.ts
index 4266453a4a3..846f1049d5a 100644
--- a/apps/files/src/init.ts
+++ b/apps/files/src/init.ts
@@ -27,6 +27,7 @@ import registerFavoritesView from './views/favorites'
 import registerRecentView from './views/recent'
 import registerPersonalFilesView from './views/personal-files'
 import registerFilesView from './views/files'
+import { registerFolderTreeView } from './views/folderTree.ts'
 import registerPreviewServiceWorker from './services/ServiceWorker.js'
 
 import { initLivePhotos } from './services/LivePhotos'
@@ -53,6 +54,7 @@ registerFavoritesView()
 registerFilesView()
 registerRecentView()
 registerPersonalFilesView()
+registerFolderTreeView()
 
 // Register file list filters
 registerHiddenFilesFilter()
diff --git a/apps/files/src/services/FolderTree.ts b/apps/files/src/services/FolderTree.ts
new file mode 100644
index 00000000000..87c3aaa7db7
--- /dev/null
+++ b/apps/files/src/services/FolderTree.ts
@@ -0,0 +1,90 @@
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+import type { ContentsWithRoot } from '@nextcloud/files'
+
+import { CancelablePromise } from 'cancelable-promise'
+import {
+	davRemoteURL,
+	Folder,
+} from '@nextcloud/files'
+import axios from '@nextcloud/axios'
+import { generateOcsUrl } from '@nextcloud/router'
+import { getCurrentUser } from '@nextcloud/auth'
+import { dirname, encodePath } from '@nextcloud/paths'
+
+import { getContents as getFiles } from './Files.ts'
+
+export const folderTreeId = 'folders'
+export const sourceRoot = `${davRemoteURL}/files/${getCurrentUser()?.uid}`
+
+interface TreeNodeData {
+	id: number,
+	displayName?: string,
+	// eslint-disable-next-line no-use-before-define
+	children?: Tree,
+}
+
+interface Tree {
+	[basename: string]: TreeNodeData,
+}
+
+export interface TreeNode {
+	source: string,
+	path: string,
+	fileid: number,
+	basename: string,
+	displayName?: string,
+}
+
+const getTreeNodes = (tree: Tree, nodes: TreeNode[] = [], currentPath: string = ''): TreeNode[] => {
+	for (const basename in tree) {
+		const path = `${currentPath}/${basename}`
+		const node: TreeNode = {
+			source: `${sourceRoot}${path}`,
+			path,
+			fileid: tree[basename].id,
+			basename,
+			displayName: tree[basename].displayName,
+		}
+		nodes.push(node)
+		if (tree[basename].children) {
+			getTreeNodes(tree[basename].children, nodes, path)
+		}
+	}
+	return nodes
+}
+
+export const getFolderTreeNodes = async (): Promise<TreeNode[]> => {
+	const { data: tree } = await axios.get<Tree>(generateOcsUrl('/apps/files/api/v1/folder-tree'))
+	const nodes = getTreeNodes(tree)
+	return nodes
+}
+
+export const getContents = (path: string): CancelablePromise<ContentsWithRoot> => getFiles(path)
+
+export const encodeSource = (source: string): string => {
+	const { origin } = new URL(source)
+	return origin + encodePath(source.slice(origin.length))
+}
+
+export const getSourceParent = (source: string): string => {
+	const parent = dirname(source)
+	if (parent === sourceRoot) {
+		return folderTreeId
+	}
+	return encodeSource(parent)
+}
+
+export const getFolderTreeViewId = (folder: Folder): string => {
+	return folder.encodedSource
+}
+
+export const getFolderTreeParentId = (folder: Folder): string => {
+	if (folder.dirname === '/') {
+		return folderTreeId
+	}
+	return dirname(folder.encodedSource)
+}
diff --git a/apps/files/src/views/Navigation.vue b/apps/files/src/views/Navigation.vue
index b0588863f5d..cca38824d2c 100644
--- a/apps/files/src/views/Navigation.vue
+++ b/apps/files/src/views/Navigation.vue
@@ -4,38 +4,14 @@
 -->
 <template>
 	<NcAppNavigation data-cy-files-navigation
+		class="files-navigation"
 		:aria-label="t('files', 'Files')">
 		<template #search>
 			<NcAppNavigationSearch v-model="searchQuery" :label="t('files', 'Filter filenames…')" />
 		</template>
 		<template #default>
 			<NcAppNavigationList :aria-label="t('files', 'Views')">
-				<NcAppNavigationItem v-for="view in parentViews"
-					:key="view.id"
-					:allow-collapse="true"
-					:data-cy-files-navigation-item="view.id"
-					:exact="useExactRouteMatching(view)"
-					:icon="view.iconClass"
-					:name="view.name"
-					:open="isExpanded(view)"
-					:pinned="view.sticky"
-					:to="generateToNavigation(view)"
-					@update:open="onToggleExpand(view)">
-					<!-- Sanitized icon as svg if provided -->
-					<NcIconSvgWrapper v-if="view.icon" slot="icon" :svg="view.icon" />
-
-					<!-- Child views if any -->
-					<NcAppNavigationItem v-for="child in childViews[view.id]"
-						:key="child.id"
-						:data-cy-files-navigation-item="child.id"
-						:exact-path="true"
-						:icon="child.iconClass"
-						:name="child.name"
-						:to="generateToNavigation(child)">
-						<!-- Sanitized icon as svg if provided -->
-						<NcIconSvgWrapper v-if="child.icon" slot="icon" :svg="child.icon" />
-					</NcAppNavigationItem>
-				</NcAppNavigationItem>
+				<FilesNavigationItem :views="viewMap" />
 			</NcAppNavigationList>
 
 			<!-- Settings modal-->
@@ -65,7 +41,7 @@
 import type { View } from '@nextcloud/files'
 
 import { emit } from '@nextcloud/event-bus'
-import { t } from '@nextcloud/l10n'
+import { translate as t, getCanonicalLocale, getLanguage } from '@nextcloud/l10n'
 import { defineComponent } from 'vue'
 
 import IconCog from 'vue-material-design-icons/Cog.vue'
@@ -73,9 +49,9 @@ import NcAppNavigation from '@nextcloud/vue/dist/Components/NcAppNavigation.js'
 import NcAppNavigationItem from '@nextcloud/vue/dist/Components/NcAppNavigationItem.js'
 import NcAppNavigationList from '@nextcloud/vue/dist/Components/NcAppNavigationList.js'
 import NcAppNavigationSearch from '@nextcloud/vue/dist/Components/NcAppNavigationSearch.js'
-import NcIconSvgWrapper from '@nextcloud/vue/dist/Components/NcIconSvgWrapper.js'
 import NavigationQuota from '../components/NavigationQuota.vue'
 import SettingsModal from './Settings.vue'
+import FilesNavigationItem from '../components/FilesNavigationItem.vue'
 
 import { useNavigation } from '../composables/useNavigation'
 import { useFilenameFilter } from '../composables/useFilenameFilter'
@@ -83,18 +59,26 @@ import { useFiltersStore } from '../store/filters.ts'
 import { useViewConfigStore } from '../store/viewConfig.ts'
 import logger from '../logger.ts'
 
+const collator = Intl.Collator(
+	[getLanguage(), getCanonicalLocale()],
+	{
+		numeric: true,
+		usage: 'sort',
+	},
+)
+
 export default defineComponent({
 	name: 'Navigation',
 
 	components: {
 		IconCog,
+		FilesNavigationItem,
 
 		NavigationQuota,
 		NcAppNavigation,
 		NcAppNavigationItem,
 		NcAppNavigationList,
 		NcAppNavigationSearch,
-		NcIconSvgWrapper,
 		SettingsModal,
 	},
 
@@ -129,28 +113,21 @@ export default defineComponent({
 			return this.$route?.params?.view || 'files'
 		},
 
-		parentViews(): View[] {
-			return this.views
-				// filter child views
-				.filter(view => !view.parent)
-				// sort views by order
-				.sort((a, b) => {
-					return a.order - b.order
-				})
-		},
-
-		childViews(): Record<string, View[]> {
+		/**
+		 * Map of parent ids to views
+		 */
+		viewMap(): Record<string, View[]> {
 			return this.views
-				// filter parent views
-				.filter(view => !!view.parent)
-				// create a map of parents and their children
-				.reduce((list, view) => {
-					list[view.parent!] = [...(list[view.parent!] || []), view]
-					// Sort children by order
-					list[view.parent!].sort((a, b) => {
-						return a.order - b.order
+				.reduce((map, view) => {
+					map[view.parent!] = [...(map[view.parent!] || []), view]
+					// TODO Allow undefined order for natural sort
+					map[view.parent!].sort((a, b) => {
+						if (typeof a.order === 'number' || typeof b.order === 'number') {
+							return (a.order ?? 0) - (b.order ?? 0)
+						}
+						return collator.compare(a.name, b.name)
 					})
-					return list
+					return map
 				}, {} as Record<string, View[]>)
 		},
 	},
@@ -175,16 +152,6 @@ export default defineComponent({
 	},
 
 	methods: {
-		/**
-		 * Only use exact route matching on routes with child views
-		 * Because if a view does not have children (like the files view) then multiple routes might be matched for it
-		 * Like for the 'files' view this does not work because of optional 'fileid' param so /files and /files/1234 are both in the 'files' view
-		 * @param view The view to check
-		 */
-		useExactRouteMatching(view: View): boolean {
-			return this.childViews[view.id]?.length > 0
-		},
-
 		/**
 		 * Set the view as active on the navigation and handle internal state
 		 * @param view View to set active
@@ -196,42 +163,6 @@ export default defineComponent({
 			emit('files:navigation:changed', view)
 		},
 
-		/**
-		 * Expand/collapse a a view with children and permanently
-		 * save this setting in the server.
-		 * @param view View to toggle
-		 */
-		onToggleExpand(view: View) {
-			// Invert state
-			const isExpanded = this.isExpanded(view)
-			// Update the view expanded state, might not be necessary
-			view.expanded = !isExpanded
-			this.viewConfigStore.update(view.id, 'expanded', !isExpanded)
-		},
-
-		/**
-		 * Check if a view is expanded by user config
-		 * or fallback to the default value.
-		 * @param view View to check if expanded
-		 */
-		isExpanded(view: View): boolean {
-			return typeof this.viewConfigStore.getConfig(view.id)?.expanded === 'boolean'
-				? this.viewConfigStore.getConfig(view.id).expanded === true
-				: view.expanded === true
-		},
-
-		/**
-		 * Generate the route to a view
-		 * @param view View to generate "to" navigation for
-		 */
-		generateToNavigation(view: View) {
-			if (view.params) {
-				const { dir } = view.params
-				return { name: 'filelist', params: view.params, query: { dir } }
-			}
-			return { name: 'filelist', params: { view: view.id } }
-		},
-
 		/**
 		 * Open the settings modal
 		 */
@@ -272,4 +203,10 @@ export default defineComponent({
 	// Prevent shrinking or growing
 	flex: 0 0 auto;
 }
+
+.files-navigation {
+	:deep(.app-navigation__content > ul.app-navigation__list) {
+		will-change: scroll-position;
+	}
+}
 </style>
diff --git a/apps/files/src/views/folderTree.ts b/apps/files/src/views/folderTree.ts
new file mode 100644
index 00000000000..85c69e5ac94
--- /dev/null
+++ b/apps/files/src/views/folderTree.ts
@@ -0,0 +1,147 @@
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+import type { TreeNode } from '../services/FolderTree.ts'
+
+import { Folder, Node, View, getNavigation } from '@nextcloud/files'
+import { translate as t } from '@nextcloud/l10n'
+import { subscribe } from '@nextcloud/event-bus'
+import { isSamePath } from '@nextcloud/paths'
+
+import FolderSvg from '@mdi/svg/svg/folder.svg?raw'
+import FolderMultipleSvg from '@mdi/svg/svg/folder-multiple.svg?raw'
+
+import {
+	encodeSource,
+	folderTreeId,
+	getContents,
+	getFolderTreeNodes,
+	getFolderTreeParentId,
+	getFolderTreeViewId,
+	getSourceParent,
+	sourceRoot,
+} from '../services/FolderTree.ts'
+
+const Navigation = getNavigation()
+
+const registerTreeNodeView = (node: TreeNode) => {
+	Navigation.register(new View({
+		id: encodeSource(node.source),
+		parent: getSourceParent(node.source),
+
+		name: node.displayName ?? node.basename,
+
+		icon: FolderSvg,
+		order: 0, // TODO Allow undefined order for natural sort
+
+		getContents,
+
+		params: {
+			view: folderTreeId,
+			fileid: String(node.fileid), // Needed for matching exact routes
+			dir: node.path,
+		},
+	}))
+}
+
+const registerFolderView = (folder: Folder) => {
+	Navigation.register(new View({
+		id: getFolderTreeViewId(folder),
+		parent: getFolderTreeParentId(folder),
+
+		name: folder.displayname,
+
+		icon: FolderSvg,
+		order: 0, // TODO Allow undefined order for natural sort
+
+		getContents,
+
+		params: {
+			view: folderTreeId,
+			fileid: String(folder.fileid),
+			dir: folder.path,
+		},
+	}))
+}
+
+const removeFolderView = (folder: Folder) => {
+	const viewId = getFolderTreeViewId(folder)
+	Navigation.remove(viewId)
+}
+
+const removeFolderViewSource = (source: string) => {
+	const Navigation = getNavigation()
+	Navigation.remove(source)
+}
+
+const onCreateNode = (node: Node) => {
+	if (!(node instanceof Folder)) {
+		return
+	}
+	registerFolderView(node)
+}
+
+const onDeleteNode = (node: Node) => {
+	if (!(node instanceof Folder)) {
+		return
+	}
+	removeFolderView(node)
+}
+
+const onMoveNode = ({ node, oldSource }) => {
+	if (!(node instanceof Folder)) {
+		return
+	}
+	removeFolderViewSource(oldSource)
+	registerFolderView(node)
+
+	const newPath = node.source.replace(sourceRoot, '')
+	const oldPath = oldSource.replace(sourceRoot, '')
+	const childViews = Navigation.views.filter(view => {
+		if (!view.params?.dir) {
+			return false
+		}
+		if (isSamePath(view.params.dir, oldPath)) {
+			return false
+		}
+		return view.params.dir.startsWith(oldPath)
+	})
+	for (const view of childViews) {
+		// @ts-expect-error FIXME Allow setting parent
+		view.parent = getFolderTreeParentId(node)
+		// @ts-expect-error dir param is defined
+		view.params.dir = view.params.dir.replace(oldPath, newPath)
+	}
+}
+
+const registerFolderTreeRoot = () => {
+	Navigation.register(new View({
+		id: folderTreeId,
+
+		name: t('files', 'All folders'),
+		caption: t('files', 'List of your files and folders.'),
+
+		icon: FolderMultipleSvg,
+		order: 50, // Below all other views
+
+		getContents,
+	}))
+}
+
+const registerFolderTreeChildren = async () => {
+	const nodes = await getFolderTreeNodes()
+	for (const node of nodes) {
+		registerTreeNodeView(node)
+	}
+
+	subscribe('files:node:created', onCreateNode)
+	subscribe('files:node:deleted', onDeleteNode)
+	subscribe('files:node:moved', onMoveNode)
+}
+
+export const registerFolderTreeView = async () => {
+	registerFolderTreeRoot()
+	await registerFolderTreeChildren()
+}
-- 
2.39.5