[Phpgroupware-developers] Hook to check with other apps before deleting an addressbook contact

[Brian Johnson]

The .16 addressbook (cvs version) includes a hook call to check with other
apps before deleting an addressbook contact

This is intended to allow other apps to use the addressbook as a contact
storage without fear of some user deleting contact data that the app links to.

>From what I can determine, this hook call is only done through the addressbook
gui and there are other ways that apps may delete contacts without the system
doing the hook call!

It is ESSENTIAL, that ALL phpgwapi methods available to developers to delete
contacts check with any app hooks in order to check whether the deletion is
permitted by other apps!

Anything short of this makes the addressbook totally useless as a contact
storage system for other apps.