Add Contact to segment When contact is created

[kuzmany]

What type of report is this:

Q	A
Bug report?	n
Feature request?	y
Enhancement?	n

Description:

New option to segments add contact to segment when is contact created

mautic/app/bundles/LeadBundle/Model/LeadModel.php

Line 679 in afb4da4

public function getCurrentLead($returnTracking = false)

Why we need this?

If we want use dynamic content we want work with contact after first visits.
Campaign need 2 crons for execute that (mautic:segments:rebuild and mautic:campaign:update)
With this option we are able to work with contacts after first touch, because is activate onLeadListChange process

mautic/app/bundles/CampaignBundle/EventListener/LeadSubscriber.php

Line 123 in afb4da4

public function onLeadListChange(ListChangeEvent $event)

[alanhartless]

If memory serves me right, I believe we used to do this and backtracked because of performance. Every time a contact is created or updated, we have to loop over every (or configured in this case) segment and query to see if the filters apply to the contact. It's heavy - which becomes problematic if the contact is created during a web request such as a form submit or a page hit.

[kuzmany]

@alanhartless Yes, but contact is created just with first request (visits, form), maybe it's worth it.

[kuzmany]

@alanhartless and this option will be disabled by default.

[PatchRanger]

Looks related to #3058 . Defintely, it could be the first step in order to go forward to #3058.