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/commonchans.cpp | 93 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 modules/commonchans.cpp

(limited to 'modules/commonchans.cpp')

diff --git a/modules/commonchans.cpp b/modules/commonchans.cpp
new file mode 100644
index 000000000..4ca7511f5
--- /dev/null
+++ b/modules/commonchans.cpp
@@ -0,0 +1,93 @@
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
+ *
+ *   Copyright (C) 2019-2024 Sadie Powell <sadie@witchery.services>
+ *   Copyright (C) 2012 Robby <robby@chatbelgie.be>
+ *   Copyright (C) 2012 Attila Molnar <attilamolnar@hush.com>
+ *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
+ *   Copyright (C) 2007 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/callerid.h"
+#include "modules/ctctags.h"
+#include "numerichelper.h"
+
+class ModuleCommonChans final
+	: public Module
+	, public CTCTags::EventListener
+{
+private:
+	CallerID::API calleridapi;
+	SimpleUserMode mode;
+
+	bool IsExempt(User* source, User* target)
+	{
+		if (!target->IsModeSet(mode) || source->SharesChannelWith(target))
+			return true; // Target doesn't have mode set or shares a common channel.
+
+		if (source->HasPrivPermission("users/ignore-commonchans") || source->server->IsService())
+			return true; // Source is an oper or a service.
+
+		if (calleridapi && calleridapi->IsOnAcceptList(source, target))
+			return true; // Source is on the callerid accept list
+
+		return false;
+	}
+
+	ModResult HandleMessage(User* user, const MessageTarget& target)
+	{
+		if (target.type != MessageTarget::TYPE_USER)
+			return MOD_RES_PASSTHRU;
+
+		auto* targetuser = target.Get<User>();
+		if (IsExempt(user, targetuser))
+			return MOD_RES_PASSTHRU;
+
+		user->WriteNumeric(Numerics::CannotSendTo(targetuser, "messages", &mode));
+		return MOD_RES_DENY;
+	}
+
+public:
+	ModuleCommonChans()
+		: Module(VF_VENDOR, "Adds user mode c (deaf_commonchan) which requires users to have a common channel before they can privately message each other.")
+		, CTCTags::EventListener(this)
+		, calleridapi(this)
+		, mode(this, "deaf_commonchan", 'c')
+	{
+	}
+
+	ModResult OnUserPreInvite(User* source, User* dest, Channel* channel, time_t timeout) override
+	{
+		if (IsExempt(source, dest))
+			return MOD_RES_PASSTHRU;
+
+		source->WriteNumeric(Numerics::CannotSendTo(dest, "invites", &mode));
+		return MOD_RES_DENY;
+	}
+
+	ModResult OnUserPreMessage(User* user, MessageTarget& target, MessageDetails& details) override
+	{
+		return HandleMessage(user, target);
+	}
+
+	ModResult OnUserPreTagMessage(User* user, MessageTarget& target, CTCTags::TagMessageDetails& details) override
+	{
+		return HandleMessage(user, target);
+	}
+};
+
+MODULE_INIT(ModuleCommonChans)
-- 
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