// ----------
#endregion
#region Events
// ------
#endregion
#region Constructors
// ------------
/// <summary>
/// Called once the constructor has filled all the properties
/// </summary>
//partial void onConstruct() {
//}
/// <summary>
/// Called once the cloning constructor has filled all the properties. Clones have no children data.
/// </summary>
//partial void onCloned(PlaylistTrack clone) {
//}
/// <summary>
/// Called once the CSV-constructor who reads the data from a CSV file has filled all the properties
/// </summary>
//partial void onCsvConstruct() {
//}
#endregion
#region Methods
// -------
/// <summary>
/// Called before {ClassName}.Store() gets executed
/// </summary>
//partial void onStoring(ref bool isCancelled) {
//}
/// <summary>
/// Called after PlaylistTrack.Store() is executed
/// </summary>
//partial void onStored() {
//}
/// <summary>
/// Called before PlaylistTrack gets written to a CSV file
/// </summary>
//partial void onCsvWrite() {
//}
/// <summary>
/// Called after all properties of PlaylistTrack are updated, but before the HasChanged event gets raised
/// </summary>
//partial void onUpdating(Playlist playlist, Track track, ref bool isCancelled){
//}
/// <summary>
/// Called after all properties of PlaylistTrack are updated, but before the HasChanged event gets raised
/// </summary>
//partial void onUpdated(PlaylistTrack old) {
//}
/// <summary>
/// Called after an update for PlaylistTrack is read from a CSV file
/// </summary>
//partial void onCsvUpdate() {
//}
/// <summary>
/// Called before PlaylistTrack.Release() gets executed
/// </summary>
partial void onReleasing()
{
if (DC.Data.PlayinglistTracksByPlaylistTrackKey.TryGetValue(Key, out var playinglistTrack))
{
playinglistTrack.Release();
//playinglistTrack.Release() does not remove playinglistTrack from Playinglist.ToPlayTracks
DC.Data.Playinglists[Playlist].Remove(playinglistTrack);
}
Playlist.RemoveFromPlaylistTracks(this);
Playlist = null !;
Track.RemoveFromPlaylistTracks(this);
Track = null !;
}
public void Update(Playlist playlist, Track track, int trackNo)
{
if (Key >= 0)
{
if (playlist.Key < 0)
{
throw new Exception($"PlaylistTrack.Update(): It is illegal to add stored PlaylistTrack '{this}'" + Environment.NewLine +
$"to Playlist '{playlist}', which is not stored.");
}
if (track.Key < 0)
{
throw new Exception($"PlaylistTrack.Update(): It is illegal to add stored PlaylistTrack '{this}'" + Environment.NewLine +
$"to Track '{track}', which is not stored.");
}
}
var clone = new PlaylistTrack(this);
var isCancelled = false;
onUpdating(playlist, track, trackNo, ref isCancelled);
if (isCancelled)
{
return;
}
//remove not yet updated item from parents which will be removed by update
var hasPlaylistChanged = Playlist != playlist;
if (hasPlaylistChanged)
{
Playlist.RemoveFromPlaylistTracks(this);
}
var hasTrackChanged = Track != track;
if (hasTrackChanged)
{
Track.RemoveFromPlaylistTracks(this);
}
//update properties and detect if any value has changed
var isChangeDetected = false;
if (Playlist != playlist)
{
Playlist = playlist;
isChangeDetected = true;
}
if (Track != track)
{
Track = track;
isChangeDetected = true;
}
if (TrackNo != trackNo)
{
TrackNo = trackNo;
isChangeDetected = true;
}
//add updated item to parents which have been newly added during update
if (hasPlaylistChanged)
{
Playlist.AddToPlaylistTracks(this);
}
if (hasTrackChanged)
{
Track.AddToPlaylistTracks(this);
}
if (isChangeDetected)
{
onUpdated(clone);
if (Key >= 0)
{
DC.Data._PlaylistTracks.ItemHasChanged(clone, this);
}
else if (DC.Data.IsTransaction)
{
DC.Data.AddTransaction(new TransactionItem(3, TransactionActivityEnum.Update, Key, this, oldItem: clone));
}
HasChanged?.Invoke(clone, this);
}
}
