[sync] mapping deletion

[Otto Berger]

Hi,

i wonder why the mapping-entries of deleted client-entries (on server 
request) dont gets deleted by the backend. Is there a special reason for 
this?

my current situation:

i extended my backend to handle these deletions:
function deleteUidMap($databaseURI, $suid) {
     ....
}

then i call this function at the Syncml_Sync class (line 386):
$backend->deleteUidMap($this->_targetLocURI, $suid);

Furthermore i also want to call deleteUidMap() at a client-delete 
request (SyncML_Backend::deleteEntry). But on this point i'm sure to get 
other side-effects. The Horde backend describes here:

// We can't remove the mapping entry as we need to keep
// the timestamp information.

So what is the solution?

Maybe it is a way to track the deletions elsewhere (i.e. session or 
mapping table) and let the Backend-Class clean up the mapping-table 
after an successful sync.

opinions? suggestions?

Otto