private static void ApplyChangeSet(string root, ChangeSet pendingChange, List<string> playlist)
{
using (log4net.ThreadContext.Stacks["NDC"].Push("Deferred Removing iTrack"))
{
foreach (var track in pendingChange.RemoveChanges)
{
playlist.Remove(track.GetPlaylistLine(root));
}
}
using (log4net.ThreadContext.Stacks["NDC"].Push("Deferred Adding iTrack"))
{
foreach (var addChange in pendingChange.AddChanges)
{
if(!playlist.Contains(addChange))
playlist.Add(addChange);
}
}
}
public Response Query([RequestBody]PlaylistRequest request)
{
SongDb.Clear();
PlaylistDb.Clear();
Response errorResponse;
if (!request.CheckValidate(out errorResponse)) return errorResponse;
using (ThreadContext.Stacks["NDC"].Push("Client " + request.DeviceId))
{
Status = "Client " + request.DeviceId + " connected.";
Log.Info("Client " + request.DeviceId + " connected.");
Log.Debug("Received Data:" + Environment.NewLine + request);
string playlistName = Path.GetFileNameWithoutExtension(request.PlaylistDevicePath);
Subscription subscription = DataManager.GetSubscription(request.SafeDeviceId);
SubscriptionManager subManager = subscription != null ? new SubscriptionManager(subscription) : null;
string playlistPath = DataManager.GetDevicePlaylistPath(request);
List<string> reconciledPlaylist;
// Read and sort the playlists
Log.Info("Loading Phone Playlist...");
List<string> devicePlaylist = new List<string>(request.PlaylistData);
Status = string.Format("Loading iTunes Library ({0})...", playlistName);
Log.InfoFormat("Loading iTunes Library ({0})...", playlistName);
List<string> desktopPlaylist;
XmliTunesLibrary library = CachedXmlLibrary.Library;
IPlaylist playlist = library.GetFirstPlaylistByName(playlistName);
if (playlist != null)
{
desktopPlaylist = library.GeneratePlaylist(playlist, request.DeviceMediaRoot);
}
else
{
// Playlist was deleted on the server
Log.WarnFormat("Fail. Playlist ({0}) does not exist", playlistName);
// We're sending an error message, along with a list of track that are no longer subscribed and
// can be safely removed.
var wipeActions =
request.PlaylistData.Select(s => new SyncAction {DeviceLocation = s, Type = SyncType.Remove});
if (subManager != null)
wipeActions = subManager.FixProposedDeletes(library, wipeActions);
return new SyncResponse
{
ErrorMessage = "Playlist does not exist",
Error = (int) SyncResponseError.PlaylistNotFound,
PlaylistDevicePath = request.PlaylistDevicePath,
Actions = wipeActions.ToArray()
};
}
// changes that were made on the DESKTOP. Apply to DEVICE.
IEnumerable<SyncAction> changesOnDesktop = DiffHandler.Diff(desktopPlaylist, devicePlaylist);
// Make sure we don't delete any tracks still present in other playlists.
if (subManager != null)
changesOnDesktop = subManager.FixProposedDeletes(library, changesOnDesktop);
// We use different files for the serving and referencing playlists because this allows us to delay
// committing a playlist as reference playlist until the client has retrieved the playlist.
// In situations where the sync is interrupted, it can otherwise lead to the server having incorrect
// state information and results in improper deletion of tracks from iTunes playlist.
string playlistRefPath = DataManager.GetReferencePlaylistPath(playlistPath);
string pendingChangesPath = DataManager.GetChangeSetCollectionPath(playlistPath);
#if ENABLE_SYNC_TO_ITUNES
if (File.Exists(playlistRefPath) && !Helper.IsAlbumOrArtistPlaylist(playlistName))
{
// load any pending changes
ChangeSetCollection pendingChanges = ChangeSetCollection.DeserializeOrCreate(pendingChangesPath);
// apply those changes to the desktopPlaylist, so we can move into the expected state
ApplyChangeSet(request.DeviceMediaRoot, pendingChanges, desktopPlaylist);
Log.InfoFormat("Loading reference playlist {0}...", playlistRefPath);
List<string> referencePlaylist = Helper.LoadPlaylist(playlistRefPath);
changesOnDesktop = DiffHandler.Diff(desktopPlaylist, referencePlaylist);
IEnumerable<SyncAction> changesOnDevice = DiffHandler.Diff(devicePlaylist, referencePlaylist); // changes that were made on the DEVICE. Apply to DESKTOP.
reconciledPlaylist = new List<string>(desktopPlaylist);
var currentChangeSet = new ChangeSet
{
AddChanges = (from change in changesOnDevice
where change.Type == SyncType.Add
select change.DeviceLocation).ToList(),
RemoveChanges = ((from change in changesOnDevice
where change.Type == SyncType.Remove
select library.GetTrack(change.DeviceLocation) as Track).TakeWhile(t => t != null)).ToList()
};
if(!currentChangeSet.IsEmpty)
pendingChanges.Add(currentChangeSet);
if (ComiTunesLibrary.IsItunesRunning())
{
ComiTunesLibrary comLibrary = new ComiTunesLibrary();
foreach (var pendingChange in pendingChanges)
{
using (log4net.ThreadContext.Stacks["NDC"].Push("Removing iTrack"))
{
foreach (var track in comLibrary.RemoveTracks(playlist, pendingChange.RemoveChanges))
{
reconciledPlaylist.Remove(track.GetPlaylistLine(request.DeviceMediaRoot));
Log.Info(track.Location);
}
}
using (log4net.ThreadContext.Stacks["NDC"].Push("Adding iTrack"))
{
foreach (var deviceLocation in comLibrary.AddTracks(
playlist,
pendingChange.AddChanges,
subscription ??
Subscription.GetQuickSubscription(playlistName, request.DeviceMediaRoot,
request.DeviceId),
request.DeviceMediaRoot))
{
reconciledPlaylist.Add(deviceLocation);
Log.Info(deviceLocation);
}
}
}
pendingChanges.Clear();
}else
{
if(!currentChangeSet.IsEmpty)
ApplyChangeSet(request.DeviceMediaRoot, currentChangeSet, reconciledPlaylist);
}
ChangeSetCollection.Serialize(pendingChanges, pendingChangesPath);
}
else
{
#endif
reconciledPlaylist = desktopPlaylist;
#if ENABLE_SYNC_TO_ITUNES
}
#endif
foreach (var change in changesOnDesktop)
{
if (change.Type != SyncType.Add) continue;
// Remember songs, we we can serve them when client requests
string id = Helper.GetSha1Hash(change.DeviceLocation);
change.TrackPath = "/songs/" + id;
SongDb.Add(id, library.GetTrack(change.DeviceLocation).Location);
}
string playlistKey = Helper.GetSha1Hash(playlistPath);
Helper.SavePlaylist(reconciledPlaylist, playlistPath);
PlaylistDb.Add(playlistKey, playlistPath);
SyncResponse syncResponse = new SyncResponse
{
PlaylistServerPath = "/playlists/" + playlistKey,
PlaylistDevicePath = request.PlaylistDevicePath,
Actions = changesOnDesktop.ToArray()
};
syncResponse.Actions.UnEscapeAllDeviceLocations();
Log.Debug("Sending Data:" + Environment.NewLine + syncResponse.ToString());
ResetStatusLater();
return syncResponse;
}
}