C++ ModeHandler::GetLevelRequired方法代码示例

	ModResult AccessCheck(User* source, Channel* channel, std::string &parameter, bool adding)
	{
		std::string::size_type pos = parameter.find(':');
		if (pos == 0 || pos == std::string::npos)
			return adding ? MOD_RES_DENY : MOD_RES_PASSTHRU;
		unsigned int mylevel = channel->GetPrefixValue(source);
		std::string mid = parameter.substr(0, pos);
		ModeHandler* mh = FindMode(mid);

		if (adding && (!mh || !mh->GetPrefixRank()))
		{
			source->WriteNumeric(415, "%s %s :Cannot find prefix mode '%s' for autoop",
				source->nick.c_str(), mid.c_str(), mid.c_str());
			return MOD_RES_DENY;
		}
		else if (!mh)
			return MOD_RES_PASSTHRU;

		std::string dummy;
		if (mh->AccessCheck(source, channel, dummy, true) == MOD_RES_DENY)
			return MOD_RES_DENY;
		if (mh->GetLevelRequired() > mylevel)
		{
			source->WriteNumeric(482, "%s %s :You must be able to set mode '%s' to include it in an autoop",
				source->nick.c_str(), channel->name.c_str(), mid.c_str());
			return MOD_RES_DENY;
		}
		return MOD_RES_PASSTHRU;
	}

	CmdResult Handle(User* user, const Params& parameters) override
	{
		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(false))
		{
			user->WriteNotice("You do not have access to unset " + ConvToStr(modeletter) + " on " +  chan->name + ".");
			return CMD_FAILURE;
		}

		std::string pattern = parameters.size() > 2 ? parameters[2] : "*";
		PrefixMode* pm;
		ListModeBase* lm;
		ListModeBase::ModeList* ml;
		Modes::ChangeList changelist;

		if ((pm = mh->IsPrefixMode()))
		{
			// As user prefix modes don't have a GetList() method, let's iterate through the channel's users.
			const Channel::MemberMap& users = chan->GetUsers();
			for (Channel::MemberMap::const_iterator it = users.begin(); it != users.end(); ++it)
			{
				if (!InspIRCd::Match(it->first->nick, pattern))
					continue;
				if (it->second->HasMode(pm) && !((it->first == user) && (pm->GetPrefixRank() > VOICE_VALUE)))
					changelist.push_remove(mh, it->first->nick);
			}
		}
		else if ((lm = mh->IsListModeBase()) && ((ml = lm->GetList(chan)) != NULL))
		{
			for (ListModeBase::ModeList::iterator it = ml->begin(); it != ml->end(); ++it)
			{
				if (!InspIRCd::Match(it->mask, pattern))
					continue;
				changelist.push_remove(mh, it->mask);
			}
		}
		else
		{
			if (chan->IsModeSet(mh))
				changelist.push_remove(mh);
		}

		ServerInstance->Modes.Process(user, chan, NULL, changelist);
		return CMD_SUCCESS;
	}

ModeAction ModeParser::TryMode(User* user, User* targetuser, Channel* chan, bool adding, const unsigned char modechar,
		std::string &parameter, bool SkipACL)
{
	ModeType type = chan ? MODETYPE_CHANNEL : MODETYPE_USER;

	ModeHandler *mh = FindMode(modechar, type);
	int pcnt = mh->GetNumParams(adding);

	// crop mode parameter size to 250 characters
	if (parameter.length() > 250 && adding)
		parameter = parameter.substr(0, 250);

	ModResult MOD_RESULT;
	FIRST_MOD_RESULT(OnRawMode, MOD_RESULT, (user, chan, modechar, parameter, adding, pcnt));

	if (IS_LOCAL(user) && (MOD_RESULT == MOD_RES_DENY))
		return MODEACTION_DENY;

	if (chan && !SkipACL && (MOD_RESULT != MOD_RES_ALLOW))
	{
		MOD_RESULT = mh->AccessCheck(user, chan, parameter, adding);

		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;
	}

//.........这里部分代码省略.........

	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;
	}