Finish the upvote/downvote implementation

src/state/models/votes-view.ts

@@ -0,0 +1,133 @@
+import {makeAutoObservable, runInAction} from 'mobx'
+import {AtUri} from '../../third-party/uri'
+import * as GetVotes from '../../third-party/api/src/client/types/app/bsky/feed/getVotes'
+import {RootStoreModel} from './root-store'
+
+type VoteItem = GetVotes.OutputSchema['votes'][number]
+
+export class VotesViewItemModel implements VoteItem {
+  // ui state
+  _reactKey: string = ''
+
+  // data
+  direction: 'up' | 'down' = 'up'
+  indexedAt: string = ''
+  createdAt: string = ''
+  actor: GetVotes.Actor = {did: '', handle: ''}
+
+  constructor(reactKey: string, v: VoteItem) {
+    makeAutoObservable(this)
+    this._reactKey = reactKey
+    Object.assign(this, v)
+  }
+}
+
+export class VotesViewModel {
+  // state
+  isLoading = false
+  isRefreshing = false
+  hasLoaded = false
+  error = ''
+  resolvedUri = ''
+  params: GetVotes.QueryParams
+
+  // data
+  uri: string = ''
+  votes: VotesViewItemModel[] = []
+
+  constructor(public rootStore: RootStoreModel, params: GetVotes.QueryParams) {
+    makeAutoObservable(
+      this,
+      {
+        rootStore: false,
+        params: false,
+      },
+      {autoBind: true},
+    )
+    this.params = params
+  }
+
+  get hasContent() {
+    return this.uri !== ''
+  }
+
+  get hasError() {
+    return this.error !== ''
+  }
+
+  get isEmpty() {
+    return this.hasLoaded && !this.hasContent
+  }
+
+  // public api
+  // =
+
+  async setup() {
+    if (!this.resolvedUri) {
+      await this._resolveUri()
+    }
+    await this._fetch()
+  }
+
+  async refresh() {
+    await this._fetch(true)
+  }
+
+  async loadMore() {
+    // TODO
+  }
+
+  // state transitions
+  // =
+
+  private _xLoading(isRefreshing = false) {
+    this.isLoading = true
+    this.isRefreshing = isRefreshing
+    this.error = ''
+  }
+
+  private _xIdle(err: string = '') {
+    this.isLoading = false
+    this.isRefreshing = false
+    this.hasLoaded = true
+    this.error = err
+  }
+
+  // loader functions
+  // =
+
+  private async _resolveUri() {
+    const urip = new AtUri(this.params.uri)
+    if (!urip.host.startsWith('did:')) {
+      urip.host = await this.rootStore.resolveName(urip.host)
+    }
+    runInAction(() => {
+      this.resolvedUri = urip.toString()
+    })
+  }
+
+  private async _fetch(isRefreshing = false) {
+    this._xLoading(isRefreshing)
+    try {
+      const res = await this.rootStore.api.app.bsky.feed.getVotes(
+        Object.assign({}, this.params, {uri: this.resolvedUri}),
+      )
+      this._replaceAll(res)
+      this._xIdle()
+    } catch (e: any) {
+      this._xIdle(`Failed to load feed: ${e.toString()}`)
+    }
+  }
+
+  private _replaceAll(res: GetVotes.Response) {
+    this.votes.length = 0
+    let counter = 0
+    for (const item of res.data.votes) {
+      this._append(counter++, item)
+    }
+  }
+
+  private _append(keyId: number, item: VoteItem) {
+    this.votes.push(new VotesViewItemModel(`item-${keyId}`, item))
+  }
+}