WIP resource management in store

packages/web-app-files/src/helpers/resource/sameResource.ts

@@ -1,4 +1,4 @@
-import { Resource } from './resource'
+import { Resource } from '../../types/resource'
 
 export const isSameResource = (r1: Resource, r2: Resource): boolean => {
   if (!r1 || !r2) return false

packages/web-app-files/src/index.js

@@ -3,10 +3,12 @@ import quickActionsImport from './quickActions'
 import store from './store'
 import { FilterSearch, SDKSearch } from './search'
 import { bus } from 'web-pkg/src/instance'
-import { archiverService, Registry } from './services'
+import { archiverService, listingService, Registry } from './services'
 import fileSideBars from './fileSideBars'
 import routes from './routes'
 import get from 'lodash-es/get'
+import { PersonalLoader, FavoritesLoader } from './services/listing/loader'
+import { View } from './types/view'
 
 // just a dummy function to trick gettext tools
 function $gettext(msg) {
@@ -90,7 +92,7 @@ export default {
   navItems,
   quickActions,
   translations,
-  ready({ router: runtimeRouter, store: runtimeStore }) {
+  ready({ router: runtimeRouter, store: runtimeStore, sdk: runtimeSdk }) {
     Registry.filterSearch = new FilterSearch(runtimeStore, runtimeRouter)
     Registry.sdkSearch = new SDKSearch(runtimeStore, runtimeRouter)
 
@@ -104,5 +106,8 @@ export default {
       runtimeStore.getters.configuration.server,
       get(runtimeStore, 'getters.capabilities.files.archivers', [])
     )
+    listingService.initialize(runtimeStore, runtimeSdk)
+    listingService.registerResourceLoader(View.Personal, new PersonalLoader())
+    listingService.registerResourceLoader(View.Favorites, new FavoritesLoader())
   }
 }

packages/web-app-files/src/services/index.ts

@@ -1,4 +1,5 @@
 export * from './archiver'
 export * from './cache'
 export * from './client'
+export * from './listing'
 export { default as Registry } from './registry'

packages/web-app-files/src/services/listing/index.ts

@@ -0,0 +1,2 @@
+export * from './listing'
+export * from './loader/resourceLoader'

packages/web-app-files/src/services/listing/listing.ts

@@ -0,0 +1,66 @@
+import { Store } from 'vuex'
+import { View } from '../../types/view'
+import { DavProperties, DavProperty } from 'web-pkg/src/constants'
+import resource, { MutationType as ResourceMutationType } from '../../store/modules/resource'
+import {
+  buildStoreModuleIdentifier,
+  MutationType as ListingMutationType
+} from '../../store/modules/listing'
+import OwnCloud from 'owncloud-sdk'
+import { ResourceLoader } from './loader'
+import { RuntimeError } from 'web-runtime/src/container/error'
+
+export class ListingService {
+  store: Store<any>
+  sdk: OwnCloud
+  loaders: Map<View, ResourceLoader>
+
+  public initialize(store: Store<any>, sdk: OwnCloud): void {
+    this.store = store
+    this.sdk = sdk
+    this.loaders = new Map<View, ResourceLoader>()
+  }
+
+  public registerResourceLoader(view: View, loader: ResourceLoader) {
+    this.loaders.set(view, loader)
+  }
+
+  public async loadResources(
+    view: View,
+    path: string,
+    davProperties: DavProperty[] = DavProperties.Default
+  ): Promise<void> {
+    if (!this.loaders.has(view)) {
+      throw new RuntimeError(`unknown view ${view} in listingService`)
+    }
+
+    // init store module for the view & path
+    const identifier = buildStoreModuleIdentifier(view, path)
+    this.store.registerModule(identifier, resource)
+    this.store.mutations[`Files/${identifier}/${ResourceMutationType.SET_LOADING}`](true)
+    this.store.mutations[`Files/${identifier}/${ResourceMutationType.SET_PATH}`](path)
+
+    // announce new view & path in `listing` store module
+    this.store.mutations[`Files/listing/${ListingMutationType.SET_ACTIVE_VIEW_AND_PATH}`]({ view, path })
+
+    // load resources
+    const resourceNode = await this.loaders
+      .get(view)
+      .loadResources(this.sdk, path, davProperties)
+      .catch(e => {
+        console.error(e)
+        // TODO: set error state in store?
+        this.store.mutations[`Files/${identifier}/${ResourceMutationType.SET_LOADING}`](false)
+        return Promise.reject(e)
+      })
+    this.store.mutations[`Files/${identifier}/${ResourceMutationType.SET_PARENT}`](resourceNode.parent)
+    this.store.mutations[`Files/${identifier}/${ResourceMutationType.SET_CHILDREN}`](
+      resourceNode.children
+    )
+
+    // exit `loading` state
+    this.store.mutations[`Files/${identifier}/${ResourceMutationType.SET_LOADING}`](false)
+  }
+}
+
+export const listingService = new ListingService()

packages/web-app-files/src/services/listing/loader/favoritesLoader.ts

@@ -0,0 +1,19 @@
+import { ResourceLoader, ResourceNode } from './resourceLoader'
+import { buildResource } from '../../../helpers/resources'
+import OwnCloud from 'owncloud-sdk'
+import { DavProperty } from 'web-pkg/src/constants'
+
+export class FavoritesLoader implements ResourceLoader {
+  async loadResources(
+    sdk: OwnCloud,
+    path: string,
+    davProperties: DavProperty[]
+  ): Promise<ResourceNode> {
+    let resources = await sdk.files.getFavoriteFiles(davProperties)
+    resources = resources.map(buildResource)
+    return {
+      parent: null,
+      children: resources
+    }
+  }
+}

packages/web-app-files/src/services/listing/loader/index.ts

@@ -0,0 +1,3 @@
+export * from './resourceLoader'
+export * from './personalLoader'
+export * from './favoritesLoader'

packages/web-app-files/src/services/listing/loader/personalLoader.ts

@@ -0,0 +1,20 @@
+import { ResourceLoader, ResourceNode } from './resourceLoader'
+import { buildResource } from '../../../helpers/resources'
+import OwnCloud from 'owncloud-sdk'
+import { DavProperty } from 'web-pkg/src/constants'
+
+export class PersonalLoader implements ResourceLoader {
+  async loadResources(
+    sdk: OwnCloud,
+    path: string,
+    davProperties: DavProperty[]
+  ): Promise<ResourceNode> {
+    let resources = await sdk.files.list(path, 1, davProperties)
+    resources = resources.map(buildResource)
+    const currentFolder = resources.shift()
+    return {
+      parent: currentFolder,
+      children: resources
+    }
+  }
+}

packages/web-app-files/src/services/listing/loader/resourceLoader.ts

@@ -0,0 +1,12 @@
+import { Resource } from '../../../types/resource'
+import { DavProperty } from 'web-pkg/src/constants'
+import OwnCloud from 'owncloud-sdk'
+
+export type ResourceNode = {
+  parent?: Resource
+  children: Resource[]
+}
+
+export interface ResourceLoader {
+  loadResources(sdk: OwnCloud, path: string, davProperties: DavProperty[]): Promise<ResourceNode>
+}

packages/web-app-files/src/store/index.js

@@ -2,8 +2,9 @@ import state from './state'
 import actions from './actions'
 import mutations from './mutations'
 import getters from './getters'
-import sidebarModule from './modules/sidebar'
+import listingModule from './modules/listing'
 import paginationModule from './modules/pagination'
+import sidebarModule from './modules/sidebar'
 const namespaced = true
 
 export default {
@@ -13,7 +14,8 @@ export default {
   actions,
   mutations,
   modules: {
-    sidebar: sidebarModule,
-    pagination: paginationModule
+    listing: listingModule,
+    pagination: paginationModule,
+    sidebar: sidebarModule
   }
 }

packages/web-app-files/src/store/modules/listing.ts

@@ -0,0 +1,108 @@
+/**
+ * problem statement:
+ * our `files` array in the vuex store of the files app is only capable of representing one state.
+ * multiple PROPFINDs for different folders, fired at similar times, will override each other in that state.
+ * the longest running propfind wins. Cancelling the requests is not solving all edge cases, as the
+ * PROPFINDs might finish at similar times so that cancellation is not happening anymore.
+ *
+ * idea for a solution:
+ * loading resources in the different views should be converted into a two step process, each:
+ * 1) set the activeView and activePath immediately after each navigation (SET_ACTIVE_VIEW, SET_ACTIVE_PATH)
+ * 2) do the PROPFIND, convert the response into resources, and set them in a dedicated folder store module.
+ *    That store module needs to get registered dynamically. The PROPFIND and conversion might be long running.
+ *    It's really important that the activePath is set as early as possible!
+ *
+ * the views then render the files of the store module that matches the current `activePath`.
+ * as a bonus, requests could be cancelled so that we avoid unnecessary store module creation.
+ *
+ * reasons for dynamically registered store modules: we need the reactivity of the individual files.
+ * Which comes built in with the store modules. Another approach would be to build a cache of recent
+ * propfind results (= response converted into a file listing). but that's not reactive by default.
+ *
+ * TODO: think about when to unregister the folder store modules. they might be big so removal should be happening as soon as not needed anymore.
+ * TODO: further think about different views: propfind, fetch incoming shares, fetch outgoing shares, trashbin
+ * TODO: the different `loadResources` methods from the views should live in a service, which then also takes care of creating the respective store module.
+ */
+import { GetterTree, MutationTree } from 'vuex'
+import crypto from 'crypto'
+import { Resource } from '../../types/resource'
+import { RuntimeError } from 'web-runtime/src/container/error'
+
+export const state = {
+  activeView: null,
+  activePath: null
+}
+export type State = typeof state
+
+export enum MutationType {
+  SET_ACTIVE_VIEW_AND_PATH = 'SET_ACTIVE_VIEW_AND_PATH'
+}
+export type Mutations<State> = {
+  [MutationType.SET_ACTIVE_VIEW_AND_PATH](
+    state: State,
+    params: {
+      activeView: string
+      activePath: string
+    }
+  ): void
+}
+export const mutations: MutationTree<State> & Mutations<State> = {
+  [MutationType.SET_ACTIVE_VIEW_AND_PATH](
+    state: State,
+    params: {
+      activeView: string
+      activePath: string
+    }
+  ) {
+    state.activeView = params.activeView
+    state.activePath = params.activePath
+  }
+}
+
+export type Getters = {
+  isLoading(state: State, getters: Getters, rootState: any): boolean
+  getCurrentFolder(state: State, getters: Getters, rootState: any, rootGetters: any): Resource
+  getFiles(state: State, getters: Getters, rootState: any, rootGetters: any): Resource[]
+}
+
+export const getters: GetterTree<State, State> & Getters = {
+  isLoading(state, getters, rootState): boolean {
+    const identifier = buildStoreModuleIdentifier(state.activeView, state.activePath)
+    if (!hasStoreModule(state.activeView, state.activePath, rootState)) {
+      return false
+    }
+    return rootState[`Files/${identifier}/loading`]
+  },
+  getCurrentFolder(state, getters, rootState, rootGetters): Resource {
+    const identifier = buildStoreModuleIdentifier(state.activeView, state.activePath)
+    if (!hasStoreModule(state.activeView, state.activePath, rootState)) {
+      throw new RuntimeError('unknown resource')
+    }
+    return rootGetters[`Files/${identifier}/parent`]
+  },
+  getFiles(state, getters, rootState, rootGetters): Resource[] {
+    const identifier = buildStoreModuleIdentifier(state.activeView, state.activePath)
+    if (!hasStoreModule(state.activeView, state.activePath, rootState)) {
+      throw new RuntimeError('unknown resource')
+    }
+    return rootGetters[`Files/${identifier}/children`]
+  }
+}
+
+export const buildStoreModuleIdentifier = (activeView: string, activePath: string): string => {
+  const hash = crypto.createHash('sha256')
+  hash.update(activePath)
+  return `${activeView}_${hash.digest().toString('hex')}`
+}
+
+const hasStoreModule = (activeView: string, activePath: string, rootState: any): boolean => {
+  const identifier = buildStoreModuleIdentifier(activeView, activePath)
+  return !!rootState[`Files/${identifier}`]
+}
+
+export default {
+  namespaced: true,
+  state: () => state,
+  getters,
+  mutations
+}

packages/web-app-files/src/store/modules/resource.ts

@@ -0,0 +1,45 @@
+import { MutationTree } from 'vuex'
+import { Resource } from '../../types/resource'
+
+export const state = {
+  loading: true,
+  path: '',
+  parent: null,
+  children: []
+}
+export type State = typeof state
+
+export enum MutationType {
+  SET_LOADING = 'SET_LOADING',
+  SET_PATH = 'SET_PATH',
+  SET_PARENT = 'SET_PARENT',
+  SET_CHILDREN = 'SET_CHILDREN'
+}
+
+export type Mutations<State> = {
+  [MutationType.SET_LOADING](state: State, loading: boolean): void
+  [MutationType.SET_PATH](state: State, path: string): void
+  [MutationType.SET_PARENT](state: State, parent: Resource): void
+  [MutationType.SET_CHILDREN](state: State, children: Resource[]): void
+}
+
+export const mutations: MutationTree<State> & Mutations<State> = {
+  [MutationType.SET_LOADING](state: State, loading: boolean): void {
+    state.loading = loading
+  },
+  [MutationType.SET_PATH](state: State, path: string): void {
+    state.path = path
+  },
+  [MutationType.SET_PARENT](state: State, parent: Resource): void {
+    state.parent = parent
+  },
+  [MutationType.SET_CHILDREN](state: State, children: Resource[]): void {
+    state.children = children
+  }
+}
+
+export default {
+  namespaced: true,
+  state: () => state,
+  mutations
+}

packages/web-app-files/src/types/view.ts

@@ -0,0 +1,9 @@
+export abstract class View {
+  static readonly Personal: string = 'personal'
+  static readonly Favorites: string = 'favorites'
+  static readonly SharedWithMe: string = 'shared-with-me'
+  static readonly SharedWithOthers: string = 'shared-with-others'
+  static readonly SharedViaLink: string = 'shared-via-link'
+  static readonly PublicFiles: string = 'public-files'
+  static readonly TrashBin: string = 'trash-bin'
+}