From 889d521e05f2e922683d48c74eb00290e7a2f548 Mon Sep 17 00:00:00 2001
From: Sadie Powell
Date: Wed, 17 Jul 2024 00:06:50 +0100
Subject: Shuffle the modules about a bit.

---
 modules/rmode.cpp | 125 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 125 insertions(+)
 create mode 100644 modules/rmode.cpp

(limited to 'modules/rmode.cpp')

diff --git a/modules/rmode.cpp b/modules/rmode.cpp
new file mode 100644
index 000000000..76fd8a99a
--- /dev/null
+++ b/modules/rmode.cpp
@@ -0,0 +1,125 @@
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
+ *
+ *   Copyright (C) 2017, 2019-2024 Sadie Powell <sadie@witchery.services>
+ *   Copyright (C) 2013-2014 Attila Molnar <attilamolnar@hush.com>
+ *   Copyright (C) 2013 Daniel Vassdal <shutter@canternet.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 "numerichelper.h"
+
+class CommandRMode final
+	: public Command
+{
+private:
+	static ModeHandler* FindMode(const std::string& mode)
+	{
+		if (mode.length() == 1)
+		{
+			ModeHandler* mh = ServerInstance->Modes.FindMode(mode[0], MODETYPE_CHANNEL);
+			if (!mh)
+				mh = ServerInstance->Modes.FindPrefix(mode[0]);
+			return mh;
+		}
+
+		return ServerInstance->Modes.FindMode(mode, MODETYPE_CHANNEL);
+	}
+
+public:
+	CommandRMode(Module* Creator)
+		: Command(Creator, "RMODE", 2, 3)
+	{
+		syntax = { "<channel> <mode> [<pattern>]" };
+	}
+
+	CmdResult Handle(User* user, const Params& parameters) override
+	{
+		auto* chan = ServerInstance->Channels.Find(parameters[0]);
+		if (!chan)
+		{
+			user->WriteNumeric(Numerics::NoSuchChannel(parameters[0]));
+			return CmdResult::FAILURE;
+		}
+
+		ModeHandler* mh = FindMode(parameters[1]);
+		if (!mh)
+		{
+			user->WriteNumeric(ERR_UNKNOWNMODE, parameters[1], "is not a recognised channel mode.");
+			return CmdResult::FAILURE;
+		}
+
+		if (chan->GetPrefixValue(user) < mh->GetLevelRequired(false))
+		{
+			user->WriteNumeric(Numerics::ChannelPrivilegesNeeded(chan, mh->GetLevelRequired(false), fmt::format("unset channel mode {} ({})",
+				mh->GetModeChar(), mh->name)));
+			return CmdResult::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.
+			for (const auto& [u, memb] : chan->GetUsers())
+			{
+				if (!InspIRCd::Match(u->nick, pattern))
+					continue;
+
+				if (memb->HasMode(pm) && !((u == user) && (pm->GetPrefixRank() > VOICE_VALUE)))
+					changelist.push_remove(mh, u->nick);
+			}
+		}
+		else if ((lm = mh->IsListModeBase()) && ((ml = lm->GetList(chan)) != nullptr))
+		{
+			auto* targuser = parameters.size() > 2 ? ServerInstance->Users.FindNick(parameters[2]) : nullptr;
+			for (const auto& entry : *ml)
+			{
+				if (targuser ? chan->CheckBan(targuser, entry.mask) : InspIRCd::Match(entry.mask, pattern))
+					changelist.push_remove(mh, entry.mask);
+			}
+		}
+		else
+		{
+			if (chan->IsModeSet(mh))
+				changelist.push_remove(mh);
+		}
+
+		ServerInstance->Modes.Process(user, chan, nullptr, changelist);
+		return CmdResult::SUCCESS;
+	}
+};
+
+class ModuleRMode final
+	: public Module
+{
+private:
+	CommandRMode cmd;
+
+public:
+	ModuleRMode()
+		: Module(VF_VENDOR, "Allows removal of channel list modes using glob patterns.")
+		, cmd(this)
+	{
+	}
+};
+
+MODULE_INIT(ModuleRMode)
-- 
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