frosty/lib/screens/settings/stores/user_store.dart

import 'package:frosty/apis/twitch_api.dart';
import 'package:frosty/models/user.dart';
import 'package:mobx/mobx.dart';

part 'user_store.g.dart';

class UserStore = UserStoreBase with _$UserStore;

abstract class UserStoreBase with Store {
  final TwitchApi twitchApi;

  /// The current user's info.
  @readonly
  UserTwitch? _details;

  /// The user's list of blocked users.
  @readonly
  var _blockedUsers = ObservableList<UserBlockedTwitch>();

  ReactionDisposer? _disposeReaction;

  UserStoreBase({required this.twitchApi});

  @action
  Future<void> init({required Map<String, String> headers}) async {
    // Get and update the current user's info.
    _details = await twitchApi.getUserInfo(headers: headers);

    // Get and update the current user's list of blocked users.
    // Don't use await because having a huge list of blocked users will block the UI.
    if (_details?.id != null) {
      twitchApi
          .getUserBlockedList(id: _details!.id, headers: headers)
          .then((blockedUsers) => _blockedUsers = blockedUsers.asObservable());
    }

    _disposeReaction = autorun(
      (_) => _blockedUsers.sort((a, b) => a.userLogin.compareTo(b.userLogin)),
    );
  }

  @action
  Future<void> block({
    required String targetId,
    required String displayName,
    required Map<String, String> headers,
  }) async {
    final success =
        await twitchApi.blockUser(userId: targetId, headers: headers);

    if (success) {
      _blockedUsers.add(UserBlockedTwitch(targetId, displayName, displayName));
    }
  }

  @action
  Future<void> unblock({
    required String targetId,
    required Map<String, String> headers,
  }) async {
    final success =
        await twitchApi.unblockUser(userId: targetId, headers: headers);
    if (success) await refreshBlockedUsers(headers: headers);
  }

  @action
  Future<void> refreshBlockedUsers({
    required Map<String, String> headers,
  }) async =>
      _blockedUsers = (await twitchApi.getUserBlockedList(
        id: _details!.id,
        headers: headers,
      ))
          .asObservable();

  @action
  void dispose() {
    _details = null;
    _blockedUsers.clear();
    if (_disposeReaction != null) _disposeReaction!();
  }
}