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/*
* 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);
}
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