public ReleaseState Update(params ReleaseUpdateCommand[] commands)
{
var state = new ReleaseState(this);
var stream = commands.OrderBy(m => m.Timestamp);
foreach (var cmd in stream)
{
if (cmd.Timestamp <= state.Timestamp)
{
continue;
}
if (!string.IsNullOrEmpty(cmd.Title))
{
state.Title = cmd.Title;
}
if (!string.IsNullOrEmpty(cmd.Artist))
{
state.Artist = cmd.Artist;
}
if (!string.IsNullOrEmpty(cmd.Genre))
{
state.Genre = cmd.Genre;
}
if (cmd.Cover != null)
{
state.Cover = cmd.Cover;
}
state.Timestamp = cmd.Timestamp;
}
return(state);
}
public ReleaseState ReplaceSubscription(SubscriptionReplaceCommand command)
{
var state = new ReleaseState(this);
state.Subscription = new SubscriptionState(command);
return(state);
}
public ReleaseState AddSubscription(string subscriptionId, SubscriptionCreateCommand command)
{
var state = new ReleaseState(this);
state.Subscription = new SubscriptionState(subscriptionId, command);
return(state);
}
public ReleaseState(ReleaseState copyFrom)
{
this.ReleaseId = copyFrom.ReleaseId;
this.Artist = copyFrom.Artist;
this.Cover = copyFrom.Cover;
this.Genre = copyFrom.Genre;
this.Title = copyFrom.Title;
this.Timestamp = copyFrom.Timestamp;
this.TrackList = copyFrom.TrackList;
}
public ReleaseState UpdateMetadata(MetadataUpdateCommand command)
{
if (!this.TrackList.ContainsKey(command.TrackId) || command.Timestamp <= this.Timestamp)
{
return(this);
}
var state = new ReleaseState(this);
state.Timestamp = command.Timestamp;
var metadata = TrackList[command.TrackId];
state.TrackList = state.TrackList.SetItem(command.TrackId, metadata.Update(command));
return(state);
}
public ReleaseState AddMetadata(MetadataCreateCommand command)
{
if (this.TrackList.ContainsKey(command.TrackId) || command.Timestamp <= this.Timestamp)
{
return(this);
}
var state = new ReleaseState(this);
state.TrackList = this.TrackList.Add(command.TrackId, new MetadataState(command.TrackId,
command.ReleaseId,
command.Title,
command.Artist,
command.Album,
command.Genre,
command.Number));
state.Timestamp = command.Timestamp;
return(state);
}
