Shuffle the modules about a bit.

1 files changed, 182 insertions, 0 deletions

diff --git a/modules/exemptchanops.cpp b/modules/exemptchanops.cpp
new file mode 100644
index 000000000..e2b00036c
--- /dev/null
+++ b/modules/exemptchanops.cpp
@@ -0,0 +1,182 @@
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
+ *
+ *   Copyright (C) 2017-2023 Sadie Powell <sadie@witchery.services>
+ *   Copyright (C) 2013-2014 Attila Molnar <attilamolnar@hush.com>
+ *   Copyright (C) 2012 Robby <robby@chatbelgie.be>
+ *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
+ *
+ * This file is part of InspIRCd.  InspIRCd is free software: you can
+ * redistribute it and/or modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation, version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include "inspircd.h"
+#include "listmode.h"
+#include "modules/exemption.h"
+#include "numerichelper.h"
+
+enum
+{
+	RPL_ENDOFEXEMPTIONLIST = 953,
+	RPL_EXEMPTIONLIST = 954
+};
+
+class ExemptChanOps final
+	: public ListModeBase
+{
+public:
+	ExemptChanOps(Module* Creator)
+		: ListModeBase(Creator, "exemptchanops", 'X', RPL_EXEMPTIONLIST, RPL_ENDOFEXEMPTIONLIST)
+	{
+		syntax = "<restriction>:<prefix>";
+	}
+
+	static PrefixMode* FindMode(const std::string& pmode)
+	{
+		if (pmode.length() == 1)
+		{
+			PrefixMode* pm = ServerInstance->Modes.FindPrefixMode(pmode[0]);
+			if (!pm)
+				pm = ServerInstance->Modes.FindPrefix(pmode[0]);
+			return pm;
+		}
+
+		ModeHandler* mh = ServerInstance->Modes.FindMode(pmode, MODETYPE_CHANNEL);
+		return mh ? mh->IsPrefixMode() : nullptr;
+	}
+
+	static bool ParseEntry(const std::string& entry, std::string& restriction, std::string& prefix)
+	{
+		// The entry must be in the format <restriction>:<prefix>.
+		std::string::size_type colon = entry.find(':');
+		if (colon == std::string::npos || colon == entry.length()-1)
+			return false;
+
+		restriction.assign(entry, 0, colon);
+		prefix.assign(entry, colon + 1, std::string::npos);
+		return true;
+	}
+
+	ModResult AccessCheck(User* source, Channel* channel, Modes::Change& change) override
+	{
+		std::string restriction;
+		std::string prefix;
+		if (!ParseEntry(change.param, restriction, prefix))
+			return MOD_RES_PASSTHRU;
+
+		PrefixMode* pm = FindMode(prefix);
+		if (!pm)
+			return MOD_RES_PASSTHRU;
+
+		if (channel->GetPrefixValue(source) >= pm->GetLevelRequired(change.adding))
+			return MOD_RES_PASSTHRU;
+
+		source->WriteNumeric(ERR_CHANOPRIVSNEEDED, channel->name, fmt::format("You must be able to {} mode {} ({}) to {} a restriction containing it",
+			change.adding ? "set" : "unset", pm->GetModeChar(), pm->name, change.adding ? "add" : "remove"));
+		return MOD_RES_DENY;
+	}
+
+	bool ValidateParam(LocalUser* user, Channel* chan, std::string& parameter) override
+	{
+		// We only enforce the format restriction against local users to avoid causing a desync.
+		std::string restriction;
+		std::string prefix;
+		if (!ParseEntry(parameter, restriction, prefix))
+		{
+			user->WriteNumeric(Numerics::InvalidModeParameter(chan, this, parameter));
+			return false;
+		}
+
+		// If there is a '-' in the restriction string ignore it and everything after it
+		// to support "auditorium-vis" and "auditorium-see" in m_auditorium
+		std::string::size_type dash = restriction.find('-');
+		if (dash != std::string::npos)
+			restriction.erase(dash);
+
+		if (!ServerInstance->Modes.FindMode(restriction, MODETYPE_CHANNEL))
+		{
+			user->WriteNumeric(Numerics::InvalidModeParameter(chan, this, parameter, "Unknown restriction."));
+			return false;
+		}
+
+		if (prefix != "*" && !FindMode(prefix))
+		{
+			user->WriteNumeric(Numerics::InvalidModeParameter(chan, this, parameter, "Unknown prefix mode."));
+			return false;
+		}
+
+		return true;
+	}
+};
+
+class ExemptHandler final
+	: public CheckExemption::EventListener
+{
+public:
+	ExemptChanOps ec;
+	ExemptHandler(Module* me)
+		: CheckExemption::EventListener(me)
+		, ec(me)
+	{
+	}
+
+	ModResult OnCheckExemption(User* user, Channel* chan, const std::string& restriction) override
+	{
+		ModeHandler::Rank mypfx = chan->GetPrefixValue(user);
+		std::string minmode;
+
+		ListModeBase::ModeList* list = ec.GetList(chan);
+
+		if (list)
+		{
+			for (const auto& entry : *list)
+			{
+				std::string::size_type pos = entry.mask.find(':');
+				if (pos == std::string::npos)
+					continue;
+
+				if (!entry.mask.compare(0, pos, restriction))
+					minmode.assign(entry.mask, pos + 1, std::string::npos);
+			}
+		}
+
+		PrefixMode* mh = ExemptChanOps::FindMode(minmode);
+		if (mh && mypfx >= mh->GetPrefixRank())
+			return MOD_RES_ALLOW;
+		if (mh || minmode == "*")
+			return MOD_RES_DENY;
+
+		return MOD_RES_PASSTHRU;
+	}
+};
+
+class ModuleExemptChanOps final
+	: public Module
+{
+private:
+	ExemptHandler eh;
+
+public:
+	ModuleExemptChanOps()
+		: Module(VF_VENDOR, "Adds channel mode X (exemptchanops) which allows channel operators to grant exemptions to various channel-level restrictions.")
+		, eh(this)
+	{
+	}
+
+	void ReadConfig(ConfigStatus& status) override
+	{
+		eh.ec.DoRehash();
+	}
+};
+
+MODULE_INIT(ModuleExemptChanOps)