public override bool CanAddChildren(IReadOnlyCollection <object> children, AddChildModifiers modifiers, out string message)
{
AssetViewModel asset = null;
var singleChild = true;
foreach (var child in children)
{
if (!singleChild)
{
message = "Multiple assets selected";
return(false);
}
asset = child as AssetViewModel;
if (asset == null)
{
message = "The selection is not an asset";
return(false);
}
if (AssetRegistry.IsContentType(TargetNode.Type) || typeof(AssetReference).IsAssignableFrom(TargetNode.Type))
{
var isCompatible = false;
var resolvedAssetTypes = AssetRegistry.GetAssetTypes(TargetNode.Type);
foreach (var resolvedAssetType in resolvedAssetTypes)
{
if (resolvedAssetType.IsAssignableFrom(asset.AssetType))
{
isCompatible = true;
break;
}
}
if (!isCompatible)
{
message = "Incompatible asset";
return(false);
}
}
var command = TargetNode.GetCommand("SetContentReference");
var param = new SetContentReferenceCommand.Parameter {
Asset = asset, Type = TargetNode.Type
};
if (!command.CanExecute(param))
{
message = "The selection is not valid in this context";
return(false);
}
singleChild = false;
}
if (asset == null)
{
message = "The selection is not an asset";
return(false);
}
message = $"Reference {asset.Url}";
return(true);
}
public override void AddChildren(IReadOnlyCollection <object> children, AddChildModifiers modifiers)
{
var asset = (AssetViewModel)children.First();
var param = new SetContentReferenceCommand.Parameter {
Asset = asset, Type = TargetNode.Type
};
var command = TargetNode.GetCommand("SetContentReference");
command.Execute(param);
}
