1 files changed, 126 insertions, 0 deletions
diff --git a/src/state/models/scene-invite-suggestions.ts b/src/state/models/scene-invite-suggestions.ts
new file mode 100644
index 000000000..34bb5c28d
--- /dev/null
+++ b/src/state/models/scene-invite-suggestions.ts
@@ -0,0 +1,126 @@
+import {makeAutoObservable, runInAction} from 'mobx'
+import {RootStoreModel} from './root-store'
+import {MembersViewModel} from './members-view'
+import {UserFollowsViewModel, FollowItem} from './user-follows-view'
+
+export interface SceneInviteSuggestionsParams {
+  sceneDid: string
+}
+
+export class SceneInviteSuggestions {
+  // state
+  isLoading = false
+  isRefreshing = false
+  hasLoaded = false
+  error = ''
+  params: SceneInviteSuggestionsParams
+  sceneMembersView: MembersViewModel
+  myFollowsView: UserFollowsViewModel
+
+  // data
+  suggestions: FollowItem[] = []
+
+  constructor(
+    public rootStore: RootStoreModel,
+    params: SceneInviteSuggestionsParams,
+  ) {
+    makeAutoObservable(
+      this,
+      {
+        rootStore: false,
+        params: false,
+      },
+      {autoBind: true},
+    )
+    this.params = params
+    this.sceneMembersView = new MembersViewModel(rootStore, {
+      actor: params.sceneDid,
+    })
+    this.myFollowsView = new UserFollowsViewModel(rootStore, {
+      user: rootStore.me.did || '',
+    })
+  }
+
+  get hasContent() {
+    return this.suggestions.length > 0
+  }
+
+  get hasError() {
+    return this.error !== ''
+  }
+
+  get isEmpty() {
+    return this.hasLoaded && !this.hasContent
+  }
+
+  // public api
+  // =
+
+  async setup() {
+    await this._fetch(false)
+  }
+
+  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 _fetch(isRefreshing = false) {
+    this._xLoading(isRefreshing)
+    try {
+      await this.sceneMembersView.setup()
+    } catch (e) {
+      console.error(e)
+      this._xIdle(
+        'Failed to fetch the current scene members. Check your internet connection and try again.',
+      )
+      return
+    }
+    try {
+      await this.myFollowsView.setup()
+    } catch (e) {
+      console.error(e)
+      this._xIdle(
+        'Failed to fetch the your current followers. Check your internet connection and try again.',
+      )
+      return
+    }
+
+    // collect all followed users that arent already in the scene
+    const newSuggestions: FollowItem[] = []
+    for (const follow of this.myFollowsView.follows) {
+      // TODO: filter out scenes
+      if (
+        !this.sceneMembersView.members.find(member => member.did === follow.did)
+      ) {
+        newSuggestions.push(follow)
+      }
+    }
+    runInAction(() => {
+      this.suggestions = newSuggestions
+    })
+    this._xIdle()
+  }
+}