// Returns true if we should apply a merged mode, false if we should skip it
static bool ShouldApplyMergedMode(Channel* chan, Modes::Change& item)
{
ModeHandler* mh = item.mh;
if ((!chan) || (!chan->IsModeSet(mh)) || (mh->IsListMode()))
// Mode not set here or merge is not applicable, apply the incoming mode
return true;
// Mode handler decides
std::string ours = chan->GetModeParameter(mh);
return mh->ResolveModeConflict(item.param, ours, chan);
}
void ModeParser::Process(const std::vector<std::string>& parameters, User* user, ModeProcessFlag flags)
{
std::string target = parameters[0];
Channel* targetchannel = ServerInstance->FindChan(target);
User* targetuser = ServerInstance->FindNick(target);
ModeType type = targetchannel ? MODETYPE_CHANNEL : MODETYPE_USER;
LastParse.clear();
LastParseParams.clear();
LastParseTranslate.clear();
if ((!targetchannel) && ((!targetuser) || (IS_SERVER(targetuser))))
{
user->WriteNumeric(ERR_NOSUCHNICK, "%s %s :No such nick/channel",user->nick.c_str(),target.c_str());
return;
}
if (parameters.size() == 1)
{
this->DisplayCurrentModes(user, targetuser, targetchannel, target.c_str());
return;
}
ModResult MOD_RESULT;
FIRST_MOD_RESULT(OnPreMode, MOD_RESULT, (user, targetuser, targetchannel, parameters));
bool SkipAccessChecks = false;
if (!IS_LOCAL(user) || ServerInstance->ULine(user->server) || MOD_RESULT == MOD_RES_ALLOW)
SkipAccessChecks = true;
else if (MOD_RESULT == MOD_RES_DENY)
return;
if (targetuser && !SkipAccessChecks && user != targetuser)
{
user->WriteNumeric(ERR_USERSDONTMATCH, "%s :Can't change mode for other users", user->nick.c_str());
return;
}
std::string mode_sequence = parameters[1];
std::string output_mode;
std::ostringstream output_parameters;
LastParseParams.push_back(output_mode);
LastParseTranslate.push_back(TR_TEXT);
bool adding = true;
char output_pm = '\0'; // current output state, '+' or '-'
unsigned int param_at = 2;
for (std::string::const_iterator letter = mode_sequence.begin(); letter != mode_sequence.end(); letter++)
{
unsigned char modechar = *letter;
if (modechar == '+' || modechar == '-')
{
adding = (modechar == '+');
continue;
}
ModeHandler *mh = this->FindMode(modechar, type);
if (!mh)
{
/* No mode handler? Unknown mode character then. */
user->WriteServ("%d %s %c :is unknown mode char to me", type == MODETYPE_CHANNEL ? 472 : 501, user->nick.c_str(), modechar);
continue;
}
std::string parameter;
int pcnt = mh->GetNumParams(adding);
if (pcnt && param_at == parameters.size())
{
/* No parameter, continue to the next mode */
mh->OnParameterMissing(user, targetuser, targetchannel);
continue;
}
else if (pcnt)
{
parameter = parameters[param_at++];
/* Make sure the user isn't trying to slip in an invalid parameter */
if ((parameter.find(':') == 0) || (parameter.rfind(' ') != std::string::npos))
continue;
if ((flags & MODE_MERGE) && targetchannel && targetchannel->IsModeSet(mh) && !mh->IsListMode())
{
std::string ours = targetchannel->GetModeParameter(mh);
if (!mh->ResolveModeConflict(parameter, ours, targetchannel))
/* we won the mode merge, don't apply this mode */
continue;
}
}
ModeAction ma = TryMode(user, targetuser, targetchannel, adding, modechar, parameter, SkipAccessChecks);
if (ma != MODEACTION_ALLOW)
continue;
char needed_pm = adding ? '+' : '-';
if (needed_pm != output_pm)
{
output_pm = needed_pm;
output_mode.append(1, output_pm);
}
output_mode.append(1, modechar);
if (pcnt)
{
output_parameters << " " << parameter;
LastParseParams.push_back(parameter);
LastParseTranslate.push_back(mh->GetTranslateType());
}
if ( (output_mode.length() + output_parameters.str().length() > 450)
|| (output_mode.length() > 100)
|| (LastParseParams.size() > ServerInstance->Config->Limits.MaxModes))
{
/* mode sequence is getting too long */
break;
}
}
LastParseParams[0] = output_mode;
if (!output_mode.empty())
{
LastParse = targetchannel ? targetchannel->name : targetuser->nick;
LastParse.append(" ");
LastParse.append(output_mode);
LastParse.append(output_parameters.str());
if (!(flags & MODE_LOCALONLY))
ServerInstance->PI->SendMode(user, targetuser, targetchannel, LastParseParams, LastParseTranslate);
if (targetchannel)
targetchannel->WriteChannel(user, "MODE " + LastParse);
else
targetuser->WriteFrom(user, "MODE " + LastParse);
FOREACH_MOD(OnMode, (user, targetuser, targetchannel, LastParseParams, LastParseTranslate));
}
else if (targetchannel && parameters.size() == 2)
{
/* Special case for displaying the list for listmodes,
* e.g. MODE #chan b, or MODE #chan +b without a parameter
*/
this->DisplayListModes(user, targetchannel, mode_sequence);
}
}