https://impro.social/js/dataLayer/preferencesProvider.5df4f4befd.js

1import { Preferences } from "/js/preferences.js";
2import { Signal } from "/js/signals.js";
3import { showToast } from "/js/toasts.js";
4import { wait } from "/js/utils.js";
5
6const RETRY_DELAY_MS = 1000;
7
8export class PreferencesProvider {
9  constructor(api) {
10    this.api = api;
11    this._preferences = null;
12    this._pendingFetch = null;
13    this.$preferences = new Signal.State(null);
14  }
15
16  async requirePreferences() {
17    if (this._preferences) return this._preferences;
18    this._pendingFetch ??= this.fetchPreferences().finally(() => {
19      this._pendingFetch = null;
20    });
21    await this._pendingFetch;
22    return this._preferences;
23  }
24
25  // Fetching preferences sometimes fails, so try it twice.
26  async fetchPreferences() {
27    try {
28      await this._fetchPreferences();
29    } catch (error) {
30      console.warn("Error fetching preferences, retrying:", error);
31      await wait(RETRY_DELAY_MS);
32      await this._fetchPreferences();
33    }
34  }
35
36  async _fetchPreferences() {
37    if (!this.api.isAuthenticated) {
38      this._setPreferences(Preferences.createLoggedOutPreferences());
39      return;
40    }
41    const preferencesObj = await this.api.getPreferences();
42    const labelerDids =
43      Preferences.getLabelerDidsFromPreferences(preferencesObj);
44    // A labeler service outage shouldn't prevent the app from starting: without
45    // definitions, labels from those labelers simply don't render.
46    let labelerDefs = [];
47    try {
48      labelerDefs = await this.api.getLabelers(labelerDids);
49    } catch (error) {
50      console.warn("Could not load labeler definitions:", error);
51      showToast(
52        "Failed to fetch moderation labels - unmoderated content may be visible",
53        { style: "warning", timeout: 6000 },
54      );
55    }
56    this._setPreferences(new Preferences(preferencesObj, labelerDefs));
57  }
58
59  async updatePreferences(preferences) {
60    if (preferences.persist) {
61      await this.api.updatePreferences(preferences.obj);
62    }
63    this._setPreferences(preferences);
64  }
65
66  _setPreferences(preferences) {
67    this._preferences = preferences;
68    this.$preferences.set(preferences);
69  }
70}