OpenTween.TweenMain.FavRemoveAsyncInternal C# (CSharp) Method

        private async Task FavRemoveAsyncInternal(IProgress<string> p, CancellationToken ct, IReadOnlyList<long> statusIds, TabModel tab)
        {
            if (ct.IsCancellationRequested)
                return;

            if (!CheckAccountValid())
                throw new WebApiException("Auth error. Check your account");

            var successIds = new List<long>();

            await Task.Run(async () =>
            {
                //スレッド処理はしない
                var allCount = 0;
                var failedCount = 0;
                foreach (var statusId in statusIds)
                {
                    allCount++;

                    var post = tab.Posts[statusId];

                    p.Report(string.Format(Properties.Resources.GetTimelineWorker_RunWorkerCompletedText17, allCount, statusIds.Count, failedCount));

                    if (!post.IsFav)
                        continue;

                    try
                    {
                        await this.twitterApi.FavoritesDestroy(post.RetweetedId ?? post.StatusId)
                            .IgnoreResponse()
                            .ConfigureAwait(false);
                    }
                    catch (WebApiException)
                    {
                        failedCount++;
                        continue;
                    }

                    successIds.Add(statusId);
                    post.IsFav = false; // リスト再描画必要

                    if (this._statuses.ContainsKey(statusId))
                    {
                        this._statuses[statusId].IsFav = false;
                    }

                    // 検索,リスト,UserTimeline,Relatedの各タブに反映
                    foreach (var tb in this._statuses.GetTabsInnerStorageType())
                    {
                        if (tb.Contains(statusId))
                            tb.Posts[statusId].IsFav = false;
                    }
                }
            });

            if (ct.IsCancellationRequested)
                return;

            var favTab = this._statuses.GetTabByType(MyCommon.TabUsageType.Favorites);
            foreach (var statusId in successIds)
            {
                // ツイートが削除された訳ではないので IsDeleted はセットしない
                favTab.EnqueueRemovePost(statusId, setIsDeleted: false);
            }

            this.RefreshTimeline();

            if (this._curList != null && this._curTab != null && this._curTab.Text == tab.TabName)
            {
                if (tab.TabType == MyCommon.TabUsageType.Favorites)
                {
                    // 色変えは不要
                }
                else
                {
                    using (ControlTransaction.Update(this._curList))
                    {
                        foreach (var statusId in successIds)
                        {
                            var idx = tab.IndexOf(statusId);
                            if (idx == -1)
                                continue;

                            var post = tab.Posts[statusId];
                            this.ChangeCacheStyleRead(post.IsRead, idx);
                        }
                    }

                    if (successIds.Contains(this._curPost.StatusId))
                        await this.DispSelectedPost(true); // 選択アイテム再表示
                }
            }
        }