Rework profile page to include working view selector

src/state/models/profile-ui.ts

@@ -0,0 +1,98 @@
+import {makeAutoObservable} from 'mobx'
+import {RootStoreModel} from './root-store'
+import {ProfileViewModel} from './profile-view'
+import {FeedViewModel} from './feed-view'
+import {BadgesViewModel} from './badges-view'
+
+export const SECTION_IDS = {
+  POSTS: 0,
+  BADGES: 1,
+}
+
+export interface ProfileUiParams {
+  user: string
+}
+
+export class ProfileUiModel {
+  // constants
+  static SELECTOR_ITEMS = ['Posts', 'Badges']
+
+  // data
+  profile: ProfileViewModel
+  feed: FeedViewModel
+  badges: BadgesViewModel
+
+  // ui state
+  selectedViewIndex = 0
+
+  constructor(
+    public rootStore: RootStoreModel,
+    public params: ProfileUiParams,
+  ) {
+    makeAutoObservable(
+      this,
+      {
+        rootStore: false,
+        params: false,
+      },
+      {autoBind: true},
+    )
+    this.profile = new ProfileViewModel(rootStore, {user: params.user})
+    this.feed = new FeedViewModel(rootStore, {author: params.user, limit: 10})
+    this.badges = new BadgesViewModel(rootStore)
+  }
+
+  get currentView(): FeedViewModel | BadgesViewModel {
+    if (this.selectedViewIndex === SECTION_IDS.POSTS) {
+      return this.feed
+    }
+    if (this.selectedViewIndex === SECTION_IDS.BADGES) {
+      return this.badges
+    }
+    throw new Error(`Invalid selector value: ${this.selectedViewIndex}`)
+  }
+
+  get isInitialLoading() {
+    const view = this.currentView
+    return view.isLoading && !view.isRefreshing && !view.hasContent
+  }
+
+  get isRefreshing() {
+    return this.profile.isRefreshing || this.currentView.isRefreshing
+  }
+
+  // public api
+  // =
+
+  setSelectedViewIndex(index: number) {
+    this.selectedViewIndex = index
+  }
+
+  async setup() {
+    await Promise.all([
+      this.profile
+        .setup()
+        .catch(err => console.error('Failed to fetch profile', err)),
+      this.feed
+        .setup()
+        .catch(err => console.error('Failed to fetch feed', err)),
+      this.badges
+        .setup()
+        .catch(err => console.error('Failed to fetch badges', err)),
+    ])
+  }
+
+  async update() {
+    await this.currentView.update()
+  }
+
+  async refresh() {
+    await Promise.all([this.profile.refresh(), this.currentView.refresh()])
+  }
+
+  async loadMore() {
+    if (!this.currentView.isLoading && !this.currentView.hasError) {
+      await this.currentView.loadMore()
+    }
+  }
+}