handling merge scenario in user event script in netsuite - merge

Question

I have successfully handled 'create', 'delete' and 'edit' types in afterSubmit event in a User Event script in NetSuite. What I need now is a way to capture Merge events. When I merge two customer records in Netsuite, the function below isn't invoked at all while it's invoked when I create, delete or edit a customer:
function afterSubmit(type)
{
...
}
Is there any way to handle merge scenarios?

Answer 1

Merge is not an event, it is handled by a duplicate manager.
Unless you hijack the merge button from the client side, I'm not sure it can be done.

Answer 2

Based on #felipechang's advice, I created a custom Merge Suitelet and all of the logic needed to go with it. All code can be found here
Step 1
Create (or add logic to) the Customer User Event script to hide the existing merge button and add a separate one.
gist
Step 2
Create (or add logic to) the Cutomer Client script to wire up the merge button click event.
gist
Step 3
Create a Merge page Suitelet that mimics the functionality of the out-of-the-box merge page but behaves differently on submit.
gist
Step 4
Create a Merge page Client script
gist
Step 5
Create a scheduled task that gets launched on Merge submit to check the progress of the merge task and then fire off custom logic if it succeeds
gist
Hopefully that saves someone some time.

Answer 3

An alternative solution to editing netsuite standard scripts, is to run a scheduled mapReduce on the netsuite record type in question. Running a search in the mapReduces getInputData, filtering on ["systemnotes.context","anyof","DPL"] (DPL => Duplicate Resolution) and processing the affected records in the map. Depending how immediately you need the event of the merge dictates the regularity of the scheduling. Unfortunately you cannot get the data of the merging record. If this is needed, I would recommend the business process is put in place to add the desired data to the master record before doing a merge.