private SimpleUndoPair InnerAddNodes(IEnumerable <ConversationNode> nodes, IEnumerable <NodeGroup> groups, ILocalizationEngine localization)
{
List <Action> undoActions = new List <Action>();
List <Action> redoActions = new List <Action>();
//Set up actions for adding/removing the nodes
foreach (var node in nodes)
{
var n = node;
SimpleUndoPair actions = n.GetNodeRemoveActions();
//Ensure that the localization engine is up to date in terms of usage of localized data
foreach (var parameter in n.Data.Parameters.OfType <ILocalizedStringParameter>())
{
if (parameter.Value != null)
{
SimpleUndoPair clearLocalization = localization.ClearLocalizationAction(Id <LocalizedStringType> .ConvertFrom(parameter.TypeId), parameter.Value);
undoActions.Add(clearLocalization.Redo);
redoActions.Add(clearLocalization.Undo);
}
}
var containingGroups = m_groups.Where(g => g.Contents.Contains(n.Data.NodeId)).Evaluate();
redoActions.Add(() =>
{
m_nodes.Add(n);
m_audioProvider.UpdateUsage(n);
foreach (var group in containingGroups)
{
group.Contents.Add(n.Data.NodeId);
}
actions.Undo(); //Undo the node removal
});
undoActions.Add(() =>
{
if (CanRemoveFromData(n, PromptNodeDeletion))
{
m_nodes.Remove(n);
}
foreach (var group in containingGroups)
{
group.Contents.Remove(n.Data.NodeId);
}
actions.Redo(); //Redo the node removal
NodesDeleted.Execute();
});
}
//Set up actions for adding/removing nodes from other groups that are gaining/losing their grouping due to removing/adding new groups
foreach (var group in groups)
{
foreach (var node in group.Contents)
{
var n = node;
var old = m_groups.SingleOrDefault(g => g.Contents.Contains(n));
if (old != null)
{
undoActions.Add(() => old.Contents.Add(n));
redoActions.Add(() => old.Contents.Remove(n));
}
}
}
//Set up actions for adding/removing the groups
undoActions.Add(() =>
{
foreach (var group in groups.Reverse())
{
m_groups.Remove(group);
}
});
redoActions.Add(() =>
{
m_groups.AddRange(groups);
});
return(new SimpleUndoPair
{
Undo = () => { using (m_audioProvider.SuppressUpdates()) foreach (Action action in undoActions)
{
action();
}
},
Redo = () => { using (m_audioProvider.SuppressUpdates()) foreach (Action action in redoActions)
{
action();
}
},
});
}
