Shuffle the modules about a bit.

1 files changed, 182 insertions, 0 deletions

diff --git a/modules/remove.cpp b/modules/remove.cpp
new file mode 100644
index 000000000..f8b583e31
--- /dev/null
+++ b/modules/remove.cpp
@@ -0,0 +1,182 @@
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
+ *
+ *   Copyright (C) 2017 B00mX0r <b00mx0r@aureus.pw>
+ *   Copyright (C) 2013, 2018-2023 Sadie Powell <sadie@witchery.services>
+ *   Copyright (C) 2012-2014 Attila Molnar <attilamolnar@hush.com>
+ *   Copyright (C) 2012 Robby <robby@chatbelgie.be>
+ *   Copyright (C) 2012 Justin Crawford <Justasic@Gmail.com>
+ *   Copyright (C) 2009 Uli Schlachter <psychon@znc.in>
+ *   Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
+ *   Copyright (C) 2008 Thomas Stagner <aquanight@gmail.com>
+ *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
+ *   Copyright (C) 2006 Oliver Lupton <om@inspircd.org>
+ *   Copyright (C) 2005-2006, 2010 Craig Edwards <brain@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 "modules/isupport.h"
+#include "numerichelper.h"
+
+class CommandRemove final
+	: public Command
+{
+private:
+	ChanModeReference nokicksmode;
+	UserModeReference servprotectmode;
+
+public:
+	ModeHandler::Rank protectedrank;
+	bool supportnokicks;
+
+	CommandRemove(Module* Creator)
+		: Command(Creator, "REMOVE", 2, 3)
+		, nokicksmode(Creator, "nokick")
+		, servprotectmode(Creator, "servprotect")
+	{
+		syntax = { "<channel> <nick> [:<reason>]" };
+		translation = { TR_TEXT, TR_NICK, TR_TEXT };
+	}
+
+	CmdResult Handle(User* user, const CommandBase::Params& parameters) override
+	{
+		// Keep compatibility with v3 servers by allowing them to send removes with the old order.
+		bool neworder = !IS_LOCAL(user) && ServerInstance->Channels.IsPrefix(parameters[0][0]);
+		const std::string& channame = parameters[neworder ? 0 : 1];
+		const std::string& username = parameters[neworder ? 1 : 0];
+
+		/* Look up the user we're meant to be removing from the channel */
+		User* target;
+		if (IS_LOCAL(user))
+			target = ServerInstance->Users.FindNick(username, true);
+		else
+			target = ServerInstance->Users.Find(username, true);
+
+		/* And the channel we're meant to be removing them from */
+		auto* channel = ServerInstance->Channels.Find(channame);
+
+		/* Fix by brain - someone needs to learn to validate their input! */
+		if (!channel)
+		{
+			user->WriteNumeric(Numerics::NoSuchChannel(channame));
+			return CmdResult::FAILURE;
+		}
+		if (!target)
+		{
+			user->WriteNumeric(Numerics::NoSuchNick(username));
+			return CmdResult::FAILURE;
+		}
+
+		if (!channel->HasUser(target))
+		{
+			user->WriteNotice(fmt::format("*** User {} is not on channel {}", target->nick, channel->name));
+			return CmdResult::FAILURE;
+		}
+
+		if (target->IsModeSet(servprotectmode))
+		{
+			user->WriteNumeric(ERR_RESTRICTED, channame, "Only a service may remove a service from a channel.");
+			return CmdResult::FAILURE;
+		}
+
+		/* We support the +Q channel mode via. the m_nokicks module, if the module is loaded and the mode is set then disallow the /remove */
+		if ((!IS_LOCAL(user)) || (!supportnokicks) || (!channel->IsModeSet(nokicksmode)))
+		{
+			/* We'll let everyone remove their level and below, eg:
+			 * ops can remove ops, halfops, voices, and those with no mode (no moders actually are set to 1)
+			 * a services target will get a higher level than it's possible for a /remover to get..so they're safe.
+			 * Nobody may remove people with >= protectedrank rank.
+			 */
+			ModeHandler::Rank ulevel = channel->GetPrefixValue(user);
+			ModeHandler::Rank tlevel = channel->GetPrefixValue(target);
+			if ((!IS_LOCAL(user)) || ((ulevel > VOICE_VALUE) && (ulevel >= tlevel) && ((protectedrank == 0) || (tlevel < protectedrank))))
+			{
+				// REMOVE will be sent to the target's server and it will reply with a PART (or do nothing if it doesn't understand the command)
+				if (!IS_LOCAL(target))
+				{
+					CommandBase::Params p;
+					p.push_back(channel->name);
+					p.push_back(target->uuid);
+					if (parameters.size() > 2)
+						p.push_back(":" + parameters[2]);
+					ServerInstance->PI->SendEncapsulatedData(target->server->GetName(), "REMOVE", p, user);
+
+					return CmdResult::SUCCESS;
+				}
+
+				std::string reasonparam;
+
+				/* If a reason is given, use it */
+				if(parameters.size() > 2)
+					reasonparam = parameters[2];
+				else
+					reasonparam = "No reason given";
+
+				/* Build up the part reason string. */
+				std::string reason = "Removed by " + user->nick + ": " + reasonparam;
+
+				channel->WriteRemoteNotice(fmt::format("{} removed {} from the channel", user->nick, target->nick));
+				target->WriteNotice("*** " + user->nick + " removed you from " + channel->name + " with the message: " + reasonparam);
+
+				channel->PartUser(target, reason);
+			}
+			else
+			{
+				user->WriteNotice(fmt::format("*** You do not have access to /REMOVE {} from {}", target->nick, channel->name));
+				return CmdResult::FAILURE;
+			}
+		}
+		else
+		{
+			/* m_nokicks.so was loaded and +Q was set, block! */
+			user->WriteNumeric(ERR_RESTRICTED, channel->name, fmt::format("Can't remove user {} from channel (+{} is set)",
+				target->nick, servprotectmode->GetModeChar()));
+			return CmdResult::FAILURE;
+		}
+
+		return CmdResult::SUCCESS;
+	}
+};
+
+class ModuleRemove final
+	: public Module
+	, public ISupport::EventListener
+{
+private:
+	CommandRemove cmd;
+
+public:
+	ModuleRemove()
+		: Module(VF_VENDOR | VF_OPTCOMMON, "Adds the /REMOVE command which allows channel operators to force part users from a channel.")
+		, ISupport::EventListener(this)
+		, cmd(this)
+	{
+	}
+
+	void OnBuildISupport(ISupport::TokenMap& tokens) override
+	{
+		tokens["REMOVE"];
+	}
+
+	void ReadConfig(ConfigStatus& status) override
+	{
+		const auto& tag = ServerInstance->Config->ConfValue("remove");
+		cmd.supportnokicks = tag->getBool("supportnokicks");
+		cmd.protectedrank = tag->getNum<ModeHandler::Rank>("protectedrank", 50000, 1);
+	}
+};
+
+MODULE_INIT(ModuleRemove)