You should be able to look at the ResolvePurpose
of the ResolveInstruction
that you get as one of the parameters in the custom resolver. Something along these lines:
public void Resolve(IdentifiableObject item, ResolveInstruction instruction, PublishContext context, ISet<ResolvedItem> resolvedItems)
{
if (instruction.Purpose == ResolvePurpose.Publish || instruction.Purpose == ResolvePurpose.RePublish)
{
// We are publishing
}
else if(instruction.Purpose == ResolvePurpose.UnPublish)
{
// We are unpublishing
}
// Don't know if this one exists in 2009, it exists in 2011 SP1
else if(instruction.Purpose == ResolvePurpose.UnknownByClient)
{
// The server is doing something that I don't understand (yet?)
}
}
EDIT
I refused to not find a way to make this work...
Indeed, in Tridion 2009 you don't have a Purpose
on the resolve instruction. You do have an Action
in the Publish Transaction, but this one is not exposed directly in the resolver. Here's how I found out if I'm publishing or unpublishing - your call if think it's overkill, but performance on my non-production VM was pretty good.
- Find the current item we're resolving for
- Load the list of PublishTransaction with a state of "In Progress"
- Find the transaction for the current item
- Determine the action by looking at the
Action
attribute
Filter filter = new Filter();
filter.Conditions["InfoType"] = 2; // Get transactions in Progress
foreach (XmlNode node in item.Session.GetList(typeof(PublishTransaction), filter))
{
if(node.Attributes["ItemID"].Value.Equals(item.Id.ToString()))
{
// we have a winner
string action;
if (node.Attributes["Action"].Value.Equals("0"))
action = "Publish";
if (node.Attributes["Action"].Value.Equals("1"))
action = "Unpublish";
}
}