C++ ModeHandler::IsListMode方法代码示例

void ModeParser::DisplayListModes(User* user, Channel* chan, std::string &mode_sequence)
{
	seq++;

	for (std::string::const_iterator letter = mode_sequence.begin(); letter != mode_sequence.end(); letter++)
	{
		unsigned char mletter = *letter;
		if (mletter == '+')
			continue;

		/* Ensure the user doesnt request the same mode twice,
		 * so they cant flood themselves off out of idiocy.
		 */
		if (sent[mletter] == seq)
			continue;

		sent[mletter] = seq;

		ModeHandler *mh = this->FindMode(mletter, MODETYPE_CHANNEL);

		if (!mh || !mh->IsListMode())
			return;

		ModResult MOD_RESULT;
		FIRST_MOD_RESULT(OnRawMode, MOD_RESULT, (user, chan, mletter, "", true, 0));
		if (MOD_RESULT == MOD_RES_DENY)
			continue;

		bool display = true;
		if (!user->HasPrivPermission("channels/auspex") && ServerInstance->Config->HideModeLists[mletter] && (chan->GetPrefixValue(user) < HALFOP_VALUE))
		{
			user->WriteNumeric(ERR_CHANOPRIVSNEEDED, "%s %s :You do not have access to view the +%c list",
				user->nick.c_str(), chan->name.c_str(), mletter);
			display = false;
		}

		// Ask mode watchers whether it's OK to show the list
		std::pair<ModeWatchIter, ModeWatchIter> itpair = modewatchermap.equal_range(mh->name);
		for (ModeWatchIter i = itpair.first; i != itpair.second; ++i)
		{
			ModeWatcher* mw = i->second;
			if (mw->GetModeType() == MODETYPE_CHANNEL)
			{
				std::string dummyparam;

				if (!mw->BeforeMode(user, NULL, chan, dummyparam, true))
				{
					// A mode watcher doesn't want us to show the list
					display = false;
					break;
				}
			}
		}

		if (display)
			mh->DisplayList(user, chan);
		else
			mh->DisplayEmptyList(user, chan);
	}
}

// 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);
}

std::string ModeParser::GiveModeList(ModeType mt)
{
	std::string type1;	/* Listmodes EXCEPT those with a prefix */
	std::string type2;	/* Modes that take a param when adding or removing */
	std::string type3;	/* Modes that only take a param when adding */
	std::string type4;	/* Modes that dont take a param */

	for (unsigned char mode = 'A'; mode <= 'z'; mode++)
	{
		ModeHandler* mh = modehandlers[mt][mode-65];
		 /* One parameter when adding */
		if (mh)
		{
			if (mh->GetNumParams(true))
			{
				PrefixMode* pm = mh->IsPrefixMode();
				if ((mh->IsListMode()) && ((!pm) || (pm->GetPrefix() == 0)))
				{
					type1 += mh->GetModeChar();
				}
				else
				{
					/* ... and one parameter when removing */
					if (mh->GetNumParams(false))
					{
						/* But not a list mode */
						if (!pm)
						{
							type2 += mh->GetModeChar();
						}
					}
					else
					{
						/* No parameters when removing */
						type3 += mh->GetModeChar();
					}
				}
			}
			else
			{
				type4 += mh->GetModeChar();
			}
		}
	}

	return type1 + "," + type2 + "," + type3 + "," + type4;
}

static void DisplayList(User* user, Channel* channel)
{
	std::stringstream items;
	for(char letter = 'A'; letter <= 'z'; letter++)
	{
		ModeHandler* mh = ServerInstance->Modes->FindMode(letter, MODETYPE_CHANNEL);
		if (!mh || mh->IsListMode())
			continue;
		if (!channel->IsModeSet(mh))
			continue;
		items << " +" << mh->name;
		if (mh->GetNumParams(true))
			items << " " << channel->GetModeParameter(mh);
	}
	const std::string line = ":" + ServerInstance->Config->ServerName + " 961 " + user->nick + " " + channel->name;
	user->SendText(line, items);
	user->WriteNumeric(960, "%s %s :End of mode list", user->nick.c_str(), channel->name.c_str());
}

void CommandMode::DisplayListModes(User* user, Channel* chan, const std::string& mode_sequence)
{
	seq++;

	for (std::string::const_iterator i = mode_sequence.begin(); i != mode_sequence.end(); ++i)
	{
		unsigned char mletter = *i;
		if (mletter == '+')
			continue;

		ModeHandler* mh = ServerInstance->Modes->FindMode(mletter, MODETYPE_CHANNEL);
		if (!mh || !mh->IsListMode())
			return;

		/* Ensure the user doesnt request the same mode twice,
		 * so they can't flood themselves off out of idiocy.
		 */
		if (sent[mletter] == seq)
			continue;

		sent[mletter] = seq;
		ServerInstance->Modes.ShowListModeList(user, chan, mh);
	}
}

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);
		}
//.........这里部分代码省略.........

//.........这里部分代码省略.........
		if (MOD_RESULT == MOD_RES_DENY)
			return MODEACTION_DENY;
		if (MOD_RESULT == MOD_RES_PASSTHRU)
		{
			unsigned int neededrank = mh->GetLevelRequired();
			/* Compare our rank on the channel against the rank of the required prefix,
			 * allow if >= ours. Because mIRC and xchat throw a tizz if the modes shown
			 * in NAMES(X) are not in rank order, we know the most powerful mode is listed
			 * first, so we don't need to iterate, we just look up the first instead.
			 */
			unsigned int ourrank = chan->GetPrefixValue(user);
			if (ourrank < neededrank)
			{
				PrefixMode* neededmh = NULL;
				for(char c='A'; c <= 'z'; c++)
				{
					PrefixMode* privmh = FindPrefixMode(c);
					if (privmh && privmh->GetPrefixRank() >= neededrank)
					{
						// this mode is sufficient to allow this action
						if (!neededmh || privmh->GetPrefixRank() < neededmh->GetPrefixRank())
							neededmh = privmh;
					}
				}
				if (neededmh)
					user->WriteNumeric(ERR_CHANOPRIVSNEEDED, "%s %s :You must have channel %s access or above to %sset channel mode %c",
						user->nick.c_str(), chan->name.c_str(), neededmh->name.c_str(), adding ? "" : "un", modechar);
				else
					user->WriteNumeric(ERR_CHANOPRIVSNEEDED, "%s %s :You cannot %sset channel mode %c",
						user->nick.c_str(), chan->name.c_str(), adding ? "" : "un", modechar);
				return MODEACTION_DENY;
			}
		}
	}

	// Ask mode watchers whether this mode change is OK
	std::pair<ModeWatchIter, ModeWatchIter> itpair = modewatchermap.equal_range(mh->name);
	for (ModeWatchIter i = itpair.first; i != itpair.second; ++i)
	{
		ModeWatcher* mw = i->second;
		if (mw->GetModeType() == type)
		{
			if (!mw->BeforeMode(user, targetuser, chan, parameter, adding))
				return MODEACTION_DENY;

			// A module whacked the parameter completely, and there was one. Abort.
			if (pcnt && parameter.empty())
				return MODEACTION_DENY;
		}
	}

	if (IS_LOCAL(user) && !user->IsOper())
	{
		char* disabled = (type == MODETYPE_CHANNEL) ? ServerInstance->Config->DisabledCModes : ServerInstance->Config->DisabledUModes;
		if (disabled[modechar - 'A'])
		{
			user->WriteNumeric(ERR_NOPRIVILEGES, "%s :Permission Denied - %s mode %c has been locked by the administrator",
				user->nick.c_str(), type == MODETYPE_CHANNEL ? "channel" : "user", modechar);
			return MODEACTION_DENY;
		}
	}

	if (adding && IS_LOCAL(user) && mh->NeedsOper() && !user->HasModePermission(modechar, type))
	{
		/* It's an oper only mode, and they don't have access to it. */
		if (user->IsOper())
		{
			user->WriteNumeric(ERR_NOPRIVILEGES, "%s :Permission Denied - Oper type %s does not have access to set %s mode %c",
					user->nick.c_str(), user->oper->name.c_str(), type == MODETYPE_CHANNEL ? "channel" : "user", modechar);
		}
		else
		{
			user->WriteNumeric(ERR_NOPRIVILEGES, "%s :Permission Denied - Only operators may set %s mode %c",
					user->nick.c_str(), type == MODETYPE_CHANNEL ? "channel" : "user", modechar);
		}
		return MODEACTION_DENY;
	}

	/* Call the handler for the mode */
	ModeAction ma = mh->OnModeChange(user, targetuser, chan, parameter, adding);

	if (pcnt && parameter.empty())
		return MODEACTION_DENY;

	if (ma != MODEACTION_ALLOW)
		return ma;

	if ((!mh->IsListMode()) && (mh->GetNumParams(true)) && (chan))
		chan->SetModeParam(mh, (adding ? parameter : ""));

	itpair = modewatchermap.equal_range(mh->name);
	for (ModeWatchIter i = itpair.first; i != itpair.second; ++i)
	{
		ModeWatcher* mw = i->second;
		if (mw->GetModeType() == type)
			mw->AfterMode(user, targetuser, chan, parameter, adding);
	}

	return MODEACTION_ALLOW;
}

	CmdResult Handle(const std::vector<std::string> &parameters, User *user)
	{
		ModeHandler* mh;
		Channel* chan = ServerInstance->FindChan(parameters[0]);
		char modeletter = parameters[1][0];

		if (chan == NULL)
		{
			user->WriteNotice("The channel " + parameters[0] + " does not exist.");
			return CMD_FAILURE;
		}

		mh = ServerInstance->Modes->FindMode(modeletter, MODETYPE_CHANNEL);
		if (mh == NULL || parameters[1].size() > 1)
		{
			user->WriteNotice(parameters[1] + " is not a valid channel mode.");
			return CMD_FAILURE;
		}

		if (chan->GetPrefixValue(user) < mh->GetLevelRequired())
		{
			user->WriteNotice("You do not have access to unset " + ConvToStr(modeletter) + " on " +  chan->name + ".");
			return CMD_FAILURE;
		}

		unsigned int prefixrank;
		char prefixchar;
		std::string pattern = parameters.size() > 2 ? parameters[2] : "*";
		ListModeBase* lm;
		ListModeBase::ModeList* ml;
		irc::modestacker modestack(false);

		if (!mh->IsListMode())
		{
			if (chan->IsModeSet(mh))
				modestack.Push(modeletter);
		}
		else if (((prefixrank = mh->GetPrefixRank()) && (prefixchar = mh->GetPrefix())))
		{
			// As user prefix modes don't have a GetList() method, let's iterate through the channel's users.
			for (UserMembIter it = chan->userlist.begin(); it != chan->userlist.end(); ++it)
			{
				if (!InspIRCd::Match(it->first->nick, pattern))
					continue;
				if (((strchr(chan->GetAllPrefixChars(user), prefixchar)) != NULL) && !(it->first == user && prefixrank > VOICE_VALUE))
					modestack.Push(modeletter, it->first->nick);
			}
		}
		else if (((lm = dynamic_cast<ListModeBase*>(mh)) != NULL) && ((ml = lm->GetList(chan)) != NULL))
		{
			for (ListModeBase::ModeList::iterator it = ml->begin(); it != ml->end(); ++it)
			{
				if (!InspIRCd::Match(it->mask, pattern))
					continue;
				modestack.Push(modeletter, it->mask);
			}
		}
		else
		{
			user->WriteNotice("Could not remove channel mode " + ConvToStr(modeletter));
			return CMD_FAILURE;
		}

		parameterlist stackresult;
		stackresult.push_back(chan->name);
		while (modestack.GetStackedLine(stackresult))
		{
			ServerInstance->Modes->Process(stackresult, user);
			stackresult.erase(stackresult.begin() + 1, stackresult.end());
		}

		return CMD_SUCCESS;
	}