/// <summary>Invokes an event and and executes an action unless the event is cancelled.</summary>
/// <param name="handler">The event handler to signal.</param>
/// <param name="source">The item affected by this operation.</param>
/// <param name="destination">The destination of this operation.</param>
/// <param name="sender">The source of the event.</param>
/// <param name="finalAction">The default action to execute if the event didn't signal cancel.</param>
/// <returns>The result of the action (if any).</returns>
public static ContentItem InvokeEvent(EventHandler <CancellableDestinationEventArgs> handler, object sender, ContentItem source, ContentItem destination, Func <ContentItem, ContentItem, ContentItem> finalAction, EventHandler <DestinationEventArgs> postHandler)
{
if (handler != null && (VersionsTriggersEvents || !source.VersionOf.HasValue))
{
CancellableDestinationEventArgs args = new CancellableDestinationEventArgs(source, destination, finalAction);
handler.Invoke(sender, args);
if (args.Cancel)
{
return(null);
}
args.AffectedItem = args.FinalAction(args.AffectedItem, args.Destination);
if (postHandler != null)
{
postHandler(sender, args);
}
return(args.AffectedItem);
}
var result2 = finalAction(source, destination);
if (postHandler != null)
{
postHandler(sender, new DestinationEventArgs(result2, destination));
}
return(result2);
}
void persister_ItemMoving(object sender, CancellableDestinationEventArgs e)
{
var originalAction = e.FinalAction;
e.FinalAction = (from, to) =>
{
var result = originalAction(from, to);
ItemDeleted(from);
return result;
};
}
/// <summary>Invokes an event and and executes an action unless the event is cancelled.</summary>
/// <param name="handler">The event handler to signal.</param>
/// <param name="source">The item affected by this operation.</param>
/// <param name="destination">The destination of this operation.</param>
/// <param name="sender">The source of the event.</param>
/// <param name="finalAction">The default action to execute if the event didn't signal cancel.</param>
/// <returns>The result of the action (if any).</returns>
public static ContentItem InvokeEvent(EventHandler <CancellableDestinationEventArgs> handler, object sender, ContentItem source, ContentItem destination, Func <ContentItem, ContentItem, ContentItem> finalAction)
{
if (handler != null && (VersionsTriggersEvents || source.VersionOf == null))
{
CancellableDestinationEventArgs args = new CancellableDestinationEventArgs(source, destination, finalAction);
handler.Invoke(sender, args);
if (args.Cancel)
{
return(null);
}
return(args.FinalAction(args.AffectedItem, args.Destination));
}
return(finalAction(source, destination));
}
