How to get the Publish & Republish state explicitly of an item on PublishTransaction Event at Committed phase?

Question

I am performing some logic after successful publishing of each page on Live target and hence I have subscribed to the following event:

EventSystem.SubscribeAsync<PublishTransaction, SetPublishStateEventArgs>(
                                                    CustomLogic, 
                                                    EventPhases.TransactionCommitted);

My custom logic works well but now I want to change the logic based on the Published/Republished state of the page.

I tried getting the ResolvePurpose using following:

PublishTransaction.Instruction.ResolveInstruction.Purpose

But it’s only giving the Publish or Unpublish state but not Republish.

The other option is to change the event Phase to EventPhases.Initiated, and I make a check if page.IsPublishedInContext but that too will always return true even if the page is Published to Staging and also my custom logic I believe will always gets invoked even if the Publishing fails which I don’t want.

Any help would be appreciated.

Thanks in advance.

Answer 1

Given below is the solution for the problem:

Subscribe to the event

EventSystem.Subscribe<PublishTransaction, SaveEventArgs>(
                                                  OnPublishStatus_Initiated, 
                                                  EventPhases.Initiated);

Check for transaction.State is success

transaction.State == PublishTransactionState.Success

Inside the success check condition, use following condition to handle logic for different publish action

transaction.Instruction.ResolveInstruction.Purpose == ResolvePurpose.Publish
transaction.Instruction.ResolveInstruction.Purpose == ResolvePurpose.RePublish

Please note, if you have scaled out CM and publisher (i.e. on separate servers) then this event system should be deployed on publisher.

We are using this code to verify the Publish and Unpublish and it is working fine.

Other option / work around: Since you have mentioned that you are getting RePublished state in Initiated state, there is one thing that you can do.

Register two event handlers

1. Initiated phase: which will log the information of transaction id and state Publish / RePublish at the centralized location.
2. TransactionCommitted: This will check that transaction is successful and if it is successful then it will get the information from the centralized location whether it is publish or republish

Centralized location can be database, context variables etc. Please note, for context variables to store data your event handlers should be synchronous.