public void Apply(VoteChange notification)
{
if (notification == null)
{
throw new ArgumentNullException(nameof(notification));
}
// Take care of the mutation, adding and removing fake uncast votes as necessary
switch (notification.Mutation)
{
case VoteMutationType.Added:
this.Votes.Add(notification.Vote);
int uncastVoteIdx = this.Votes.FindIndex(x => x.IsCast == false);
if (uncastVoteIdx != -1)
{
this.Votes.RemoveAt(uncastVoteIdx);
}
this.VotesByParticipant.Add(notification.Vote);
this.VotesByNote.Add(notification.Vote);
this.VotesByNoteGroup.Add(notification.Vote);
break;
case VoteMutationType.Removed:
int voteId = notification.Vote.Id;
this.Votes.RemoveAll(v => v.Id == voteId);
this.Votes.Add(VoteModel.CreateEmptyFrom(notification.Vote));
this.VotesByParticipant.Remove(notification.Vote);
this.VotesByNote.Remove(notification.Vote);
this.VotesByNoteGroup.Remove(notification.Vote);
break;
default:
throw new ArgumentOutOfRangeException(nameof(notification));
}
}
public void Remove(VoteModel notificationVote)
{
int?key = this._keySelector.Invoke(notificationVote);
if (key == null)
{
return;
}
if (!this._dictionary.TryGetValue(key.Value, out List <VoteModel>?votes))
{
return;
}
votes.RemoveAll(x => x.Id == notificationVote.Id);
// Add artificial uncast vote
VoteModel artificialVote = VoteModel.CreateEmptyFrom(notificationVote);
if (this._keySelector.Invoke(artificialVote) != null)
{
votes.Add(artificialVote);
}
}