Shuffle the modules about a bit.

1 files changed, 155 insertions, 0 deletions

diff --git a/modules/spanningtree/metadata.cpp b/modules/spanningtree/metadata.cpp
new file mode 100644
index 000000000..1b0814344
--- /dev/null
+++ b/modules/spanningtree/metadata.cpp
@@ -0,0 +1,155 @@
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
+ *
+ *   Copyright (C) 2018-2023 Sadie Powell <sadie@witchery.services>
+ *   Copyright (C) 2013-2015 Attila Molnar <attilamolnar@hush.com>
+ *   Copyright (C) 2012 Robby <robby@chatbelgie.be>
+ *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
+ *   Copyright (C) 2009 Uli Schlachter <psychon@znc.in>
+ *   Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
+ *
+ * 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 "extension.h"
+
+#include "commands.h"
+
+CmdResult CommandMetadata::Handle(User* srcuser, Params& params)
+{
+	if (params[0] == "*")
+	{
+		std::string value = params.size() < 3 ? "" : params[2];
+		FOREACH_MOD(OnDecodeMetadata, (nullptr, params[1], value));
+		return CmdResult::SUCCESS;
+	}
+
+	if (params[0] == "@")
+	{
+		// Membership METADATA has four additional parameters:
+		// 1. The uuid of the membership's user.
+		// 2. The name of the membership's channel.
+		// 3. The channel creation timestamp.
+		// 4. The membership identifier.
+		//
+		// :22D METADATA @ uuid #channel 12345 12345 extname :extdata
+		if (params.size() < 6)
+			throw ProtocolException("Insufficient parameters for channel METADATA");
+
+		auto* u = ServerInstance->Users.FindUUID(params[1]);
+		if (!u)
+			return CmdResult::FAILURE; // User does not exist.
+
+		auto* c = ServerInstance->Channels.Find(params[2]);
+		if (!c)
+			return CmdResult::FAILURE; // Channel does not exist.
+
+		time_t chants = ServerCommand::ExtractTS(params[3]);
+		if (c->age < chants)
+			return CmdResult::FAILURE; // Their channel is newer than ours (probably recreated).
+
+		Membership* m = c->GetUser(u);
+		if (!m || m->id != Membership::IdFromString(params[4]))
+			return CmdResult::FAILURE; // User is not in the channel.
+
+		ExtensionItem* item = ServerInstance->Extensions.GetItem(params[5]);
+		const std::string value = params.size() < 7 ? "" : params[6];
+		if (item && item->extype == ExtensionType::MEMBERSHIP)
+			item->FromNetwork(m, value);
+		FOREACH_MOD(OnDecodeMetadata, (m, params[5], value));
+	}
+
+	if (ServerInstance->Channels.IsPrefix(params[0][0]))
+	{
+		// Channel METADATA has an additional parameter: the channel TS
+		// :22D METADATA #channel 12345 extname :extdata
+		if (params.size() < 3)
+			throw ProtocolException("Insufficient parameters for channel METADATA");
+
+		auto* c = ServerInstance->Channels.Find(params[0]);
+		if (!c)
+			return CmdResult::FAILURE;
+
+		time_t ChanTS = ServerCommand::ExtractTS(params[1]);
+		if (c->age < ChanTS)
+			// Their TS is newer than ours, discard this command and do not propagate
+			return CmdResult::FAILURE;
+
+		std::string value = params.size() < 4 ? "" : params[3];
+
+		ExtensionItem* item = ServerInstance->Extensions.GetItem(params[2]);
+		if (item && item->extype == ExtensionType::CHANNEL)
+			item->FromNetwork(c, value);
+		FOREACH_MOD(OnDecodeMetadata, (c, params[2], value));
+	}
+	else
+	{
+		auto* u = ServerInstance->Users.FindUUID(params[0]);
+		if (u)
+		{
+			ExtensionItem* item = ServerInstance->Extensions.GetItem(params[1]);
+			std::string value = params.size() < 3 ? "" : params[2];
+
+			if (item && item->extype == ExtensionType::USER)
+				item->FromNetwork(u, value);
+			FOREACH_MOD(OnDecodeMetadata, (u, params[1], value));
+		}
+	}
+
+	return CmdResult::SUCCESS;
+}
+
+CommandMetadata::Builder::Builder(const Extensible* ext, const std::string& key, const std::string& val)
+	: CmdBuilder("METADATA")
+{
+	switch (ext->extype)
+	{
+		case ExtensionType::CHANNEL:
+		{
+			const Channel* chan = static_cast<const Channel*>(ext);
+			push(chan->name);
+			push_int(chan->age);
+			break;
+		}
+
+		case ExtensionType::MEMBERSHIP:
+		{
+			const Membership* memb = static_cast<const Membership*>(ext);
+			push_raw("@");
+			push(memb->user->uuid);
+			push_raw(memb->chan->name);
+			push_int(memb->chan->age);
+			push_int(memb->id);
+			break;
+		}
+
+		case ExtensionType::USER:
+		{
+			const User* user = static_cast<const User*>(ext);
+			push(user->uuid);
+			break;
+		}
+	}
+	push(key);
+	push_last(val);
+}
+
+CommandMetadata::Builder::Builder(const std::string& key, const std::string& val)
+	: CmdBuilder("METADATA")
+{
+	push("*");
+	push(key);
+	push_last(val);
+}