static void MigrateLocalMylistToPlaylistRepository(PlaylistRepository playlistRepository)
{
var groups = LocalMylistDb.GetLocalMylistGroups();
if (groups.Count > 0)
{
System.Diagnostics.Debug.WriteLine("start migrating LocalMylist.");
foreach (var legacyLocalPlaylist in groups)
{
var newPlaylist = new PlaylistEntity()
{
Id = LiteDB.ObjectId.NewObjectId().ToString(),
Label = legacyLocalPlaylist.Label,
Count = legacyLocalPlaylist.Items.Count,
PlaylistOrigin = Interfaces.PlaylistOrigin.Local
};
playlistRepository.Upsert(newPlaylist);
playlistRepository.AddItems(newPlaylist.Id, legacyLocalPlaylist.Items);
LocalMylistDb.Remove(legacyLocalPlaylist);
System.Diagnostics.Debug.WriteLine($"migrated: {newPlaylist.Label} ({newPlaylist.Count})");
}
System.Diagnostics.Debug.WriteLine("migrating LocalMylist done.");
}
}
static private List <LocalMylistGroup> RestoreLocalMylistGroupsFromLocalDatabase()
{
var groups = LocalMylistDb.GetLocalMylistGroups();
return(groups
.Select(x => new LocalMylistGroup(x.Id, x.Label, new ObservableCollection <string>(x.Items)))
.ToList()
);
}
public LocalMylistManager(
)
{
Mylists = new ObservableCollection <LocalMylistGroup>();
Mylists.CollectionChangedAsObservable()
.Subscribe(e =>
{
if (e.Action == System.Collections.Specialized.NotifyCollectionChangedAction.Add)
{
foreach (var newItem in e.NewItems.Cast <LocalMylistGroup>())
{
CompositeDisposable disposables = new CompositeDisposable();
new[]
{
newItem.ObserveProperty(x => x.Label).ToUnit(),
newItem.CollectionChangedAsObservable().ToUnit()
}
.Merge()
.Throttle(TimeSpan.FromSeconds(1))
.Subscribe(_ =>
{
LocalMylistDb.AddOrUpdate(new LocalMylistData()
{
Id = newItem.Id,
Label = newItem.Label,
Items = newItem.ToList(),
SortIndex = newItem.SortIndex
});
})
.AddTo(disposables);
LocalMylistPropertyChangedObserverMap.Add(newItem.Id, disposables);
}
}
else if (e.Action == System.Collections.Specialized.NotifyCollectionChangedAction.Remove)
{
foreach (var removeItem in e.NewItems.Cast <LocalMylistGroup>())
{
LocalMylistDb.Get(removeItem.Id);
if (LocalMylistPropertyChangedObserverMap.TryGetValue(removeItem.Id, out var disposer))
{
disposer.Dispose();
LocalMylistPropertyChangedObserverMap.Remove(removeItem.Id);
}
}
}
});
foreach (var restoreItem in RestoreLocalMylistGroupsFromLocalDatabase())
{
Mylists.Add(restoreItem);
}
}
