static IEnumerable <RankingItem> GetGenreTagRankingItems(RankingGenre genre, RankingSettings rankingSettings)
{
// アプリ上の要請としてジャンルトップの「すべて」or「話題」を除外して表示したい
// （GroupItemと表示錠の役割が重複してしまうような、ユーザーを混乱させてしまう可能性を除去したい）
var info = Database.Local.RankingGenreTagsDb.Get(genre);
if (info == null)
{
return(Enumerable.Empty <RankingItem>());
}
return(info.Tags
.Where(x => !string.IsNullOrEmpty(x.Tag) && x.Tag != "all")
.Select(y => new RankingItem()
{
Genre = genre,
IsDisplay = !rankingSettings.IsHiddenTag(genre, y.Tag),
Label = y.DisplayName,
Tag = y.Tag
}
));
}
public async Task OnNavigatedToAsync(INavigationParameters parameters)
{
if (!_appFlagsRepository.IsRankingInitialUpdate)
{
try
{
foreach (var genreItem in _RankingGenreItems)
{
if (genreItem.Genre == null)
{
continue;
}
var genre = genreItem.Genre.Value;
var tags = await _rankingProvider.GetRankingGenreTagsAsync(genre, true);
using (var refresh = genreItem.Items.DeferRefresh())
{
var rankingItems = tags
.Where(x => !string.IsNullOrEmpty(x.Tag) && x.Tag != "all")
.Select(y => new RankingItem()
{
Genre = genre,
IsDisplay = !RankingSettings.IsHiddenTag(genre, y.Tag),
Label = y.DisplayName,
Tag = y.Tag
}
);
genreItem.Items.Clear();
foreach (var tag in rankingItems)
{
genreItem.Items.Add(tag);
}
}
await Task.Delay(500);
}
}
finally
{
_appFlagsRepository.IsRankingInitialUpdate = true;
}
}
else
{
if (_prevSelectedGenre != null)
{
var updateTargetGenre = _RankingGenreItems.FirstOrDefault(x => x.Genre == _prevSelectedGenre);
if (updateTargetGenre != null)
{
updateTargetGenre.Items.Clear();
var items = GetGenreTagRankingItems(updateTargetGenre.Genre.Value, RankingSettings);
using (updateTargetGenre.Items.DeferRefresh())
{
foreach (var a in items)
{
updateTargetGenre.Items.Add(a);
}
}
}
}
}
}
