void AbiCollab::addCollaborator(BuddyPtr pCollaborator)
{
    UT_DEBUGMSG(("AbiCollab::addCollaborator()\n"));
    UT_return_if_fail(pCollaborator)

    // check if this buddy is in the access control list if we are hosting
    // this session
    if (isLocallyControlled())
    {
        AccountHandler* pAccount = pCollaborator->getHandler();
        UT_return_if_fail(pAccount);
        if (!pAccount->hasAccess(m_vAcl, pCollaborator))
        {
            UT_ASSERT(UT_NOT_IMPLEMENTED);
            return;
        }
    }

    // check for duplicates (as long as we assume a collaborator can only be part of a collaboration session once)
    std::map<BuddyPtr, std::string>::iterator it = m_vCollaborators.find(pCollaborator);
    if (it != m_vCollaborators.end())
    {
        UT_DEBUGMSG(("Attempting to add buddy '%s' twice to a collaboration session!", pCollaborator->getDescription().utf8_str()));
        UT_ASSERT_HARMLESS(UT_SHOULD_NOT_HAPPEN);
        return;
    }

    m_vCollaborators[pCollaborator] = ""; // will fill the remote document UUID later once we receive a packet from this buddy
}
// should we move this to AbiCollab.cpp ?
void AbiCollabSessionManager::updateAcl(AbiCollab* pSession, AccountHandler* pAccount, const std::vector<std::string> vAcl)
{
	UT_return_if_fail(pSession);
	UT_return_if_fail(pAccount);

	// check if all current collaborators are still allowed to collaborate; if not,
	// then remove them from the session
	const std::map<BuddyPtr, std::string> collaborators = pSession->getCollaborators();
	for (std::map<BuddyPtr, std::string>::const_iterator cit = collaborators.begin(); cit != collaborators.end(); cit++)
	{
		BuddyPtr pBuddy = (*cit).first;
		UT_continue_if_fail(pBuddy);
		AccountHandler* pBuddyAccount = pBuddy->getHandler();
		UT_continue_if_fail(pBuddyAccount);
		UT_continue_if_fail(pBuddyAccount == pAccount);
		if (!pBuddyAccount->hasAccess(vAcl, pBuddy))
		{
			// this current collaborator has been banned from the session, so
			// disconnect him
			UT_ASSERT_HARMLESS(UT_NOT_IMPLEMENTED);
		}
	}

	// set the new ACL on the account handler
	pAccount->setAcl(pSession, vAcl);

	// set the new access control list on the session
	pSession->setAcl(vAcl);
}