// questionable
public async Task SyncBeatmapsFromHoLLy(IEnumerable <BeatmapEntry> entries)
{
var allBeatmaps = entries.Select(BeatmapConvertExtension.ParseFromHolly).ToList();
var allIds = allBeatmaps.Select(k => k.Id).ToList();
var nonExistAnyMore = await Beatmaps.AsNoTracking().Where(k => !allIds.Contains(k.Id)).ToListAsync();
if (nonExistAnyMore.Count > 0)
{
Beatmaps.RemoveRange(nonExistAnyMore);
}
var exists = await Beatmaps.AsNoTracking().Where(k => allIds.Contains(k.Id)).Select(k => k.Id).ToListAsync();
if (exists.Count > 0)
{
var existsHashSet = exists.ToHashSet();
Beatmaps.UpdateRange(allBeatmaps.Where(k => existsHashSet.Contains(k.Id)));
}
var news = allIds.Except(exists).ToHashSet();
if (news.Count > 0)
{
var addRange = allBeatmaps.Where(k => news.Contains(k.Id)).ToHashSet();
Beatmaps.AddRange(addRange);
}
await SaveChangesAsync();
}
public async Task RemoveSyncedAll()
{
Beatmaps.RemoveRange(Beatmaps.Where(k => !k.InOwnDb));
await SaveChangesAsync();
}