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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2018 linuxdaemon <linuxdaemon.irc@gmail.com>
* Copyright (C) 2013, 2017-2020 Sadie Powell <sadie@witchery.services>
* Copyright (C) 2013 Daniel Vassdal <shutter@canternet.org>
* Copyright (C) 2012-2015, 2018 Attila Molnar <attilamolnar@hush.com>
* Copyright (C) 2012, 2019 Robby <robby@chatbelgie.be>
* Copyright (C) 2010 Craig Edwards <brain@inspircd.org>
* Copyright (C) 2009-2010 Daniel De Graaf <danieldg@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/ircv3_servertime.h"
#include "modules/ircv3_batch.h"
#include "modules/server.h"
typedef insp::flat_map<std::string, std::string> HistoryTagMap;
struct HistoryItem
{
time_t ts;
std::string text;
MessageType type;
HistoryTagMap tags;
std::string sourcemask;
HistoryItem(User* source, const MessageDetails& details)
: ts(ServerInstance->Time())
, text(details.text)
, type(details.type)
, sourcemask(source->GetFullHost())
{
tags.reserve(details.tags_out.size());
for (ClientProtocol::TagMap::const_iterator iter = details.tags_out.begin(); iter != details.tags_out.end(); ++iter)
tags[iter->first] = iter->second.value;
}
};
struct HistoryList
{
std::deque<HistoryItem> lines;
unsigned int maxlen;
unsigned int maxtime;
HistoryList(unsigned int len, unsigned int time)
: maxlen(len)
, maxtime(time)
{
}
};
class HistoryMode : public ParamMode<HistoryMode, SimpleExtItem<HistoryList> >
{
public:
unsigned int maxlines;
HistoryMode(Module* Creator)
: ParamMode<HistoryMode, SimpleExtItem<HistoryList> >(Creator, "history", 'H')
{
syntax = "<max-messages>:<max-duration>";
}
ModeAction OnSet(User* source, Channel* channel, std::string& parameter) CXX11_OVERRIDE
{
std::string::size_type colon = parameter.find(':');
if (colon == std::string::npos)
{
source->WriteNumeric(Numerics::InvalidModeParameter(channel, this, parameter));
return MODEACTION_DENY;
}
std::string duration(parameter, colon+1);
if ((IS_LOCAL(source)) && ((duration.length() > 10) || (!InspIRCd::IsValidDuration(duration))))
{
source->WriteNumeric(Numerics::InvalidModeParameter(channel, this, parameter));
return MODEACTION_DENY;
}
unsigned int len = ConvToNum<unsigned int>(parameter.substr(0, colon));
unsigned long time;
if (!InspIRCd::Duration(duration, time) || len == 0 || (len > maxlines && IS_LOCAL(source)))
{
source->WriteNumeric(Numerics::InvalidModeParameter(channel, this, parameter));
return MODEACTION_DENY;
}
if (len > maxlines)
len = maxlines;
HistoryList* history = ext.get(channel);
if (history)
{
// Shrink the list if the new line number limit is lower than the old one
if (len < history->lines.size())
history->lines.erase(history->lines.begin(), history->lines.begin() + (history->lines.size() - len));
history->maxlen = len;
history->maxtime = time;
}
else
{
ext.set(channel, new HistoryList(len, time));
}
return MODEACTION_ALLOW;
}
void SerializeParam(Channel* chan, const HistoryList* history, std::string& out)
{
out.append(ConvToStr(history->maxlen));
out.append(":");
out.append(InspIRCd::DurationString(history->maxtime));
}
};
class ModuleChanHistory
: public Module
, public ServerProtocol::BroadcastEventListener
{
private:
HistoryMode m;
bool prefixmsg;
UserModeReference botmode;
bool dobots;
IRCv3::Batch::CapReference batchcap;
IRCv3::Batch::API batchmanager;
IRCv3::Batch::Batch batch;
IRCv3::ServerTime::API servertimemanager;
ClientProtocol::MessageTagEvent tagevent;
void AddTag(ClientProtocol::Message& msg, const std::string& tagkey, std::string& tagval)
{
const Events::ModuleEventProvider::SubscriberList& list = tagevent.GetSubscribers();
for (Events::ModuleEventProvider::SubscriberList::const_iterator i = list.begin(); i != list.end(); ++i)
{
ClientProtocol::MessageTagProvider* const tagprov = static_cast<ClientProtocol::MessageTagProvider*>(*i);
const ModResult res = tagprov->OnProcessTag(ServerInstance->FakeClient, tagkey, tagval);
if (res == MOD_RES_ALLOW)
msg.AddTag(tagkey, tagprov, tagval);
else if (res == MOD_RES_DENY)
break;
}
}
void SendHistory(LocalUser* user, Channel* channel, HistoryList* list, time_t mintime)
{
if (batchmanager)
{
batchmanager->Start(batch);
batch.GetBatchStartMessage().PushParamRef(channel->name);
}
for(std::deque<HistoryItem>::iterator i = list->lines.begin(); i != list->lines.end(); ++i)
{
HistoryItem& item = *i;
if (item.ts >= mintime)
{
ClientProtocol::Messages::Privmsg msg(ClientProtocol::Messages::Privmsg::nocopy, item.sourcemask, channel, item.text, item.type);
for (HistoryTagMap::iterator iter = item.tags.begin(); iter != item.tags.end(); ++iter)
AddTag(msg, iter->first, iter->second);
if (servertimemanager)
servertimemanager->Set(msg, item.ts);
batch.AddToBatch(msg);
user->Send(ServerInstance->GetRFCEvents().privmsg, msg);
}
}
if (batchmanager)
batchmanager->End(batch);
}
public:
ModuleChanHistory()
: ServerProtocol::BroadcastEventListener(this)
, m(this)
, botmode(this, "bot")
, batchcap(this)
, batchmanager(this)
, batch("chathistory")
, servertimemanager(this)
, tagevent(this)
{
}
void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE
{
ConfigTag* tag = ServerInstance->Config->ConfValue("chanhistory");
m.maxlines = tag->getUInt("maxlines", 50, 1);
prefixmsg = tag->getBool("prefixmsg", tag->getBool("notice", true));
dobots = tag->getBool("bots", true);
}
ModResult OnBroadcastMessage(Channel* channel, const Server* server) CXX11_OVERRIDE
{
return channel->IsModeSet(m) ? MOD_RES_ALLOW : MOD_RES_PASSTHRU;
}
void OnUserPostMessage(User* user, const MessageTarget& target, const MessageDetails& details) CXX11_OVERRIDE
{
if ((target.type == MessageTarget::TYPE_CHANNEL) && (target.status == 0) && !details.IsCTCP())
{
Channel* c = target.Get<Channel>();
HistoryList* list = m.ext.get(c);
if (list)
{
list->lines.push_back(HistoryItem(user, details));
if (list->lines.size() > list->maxlen)
list->lines.pop_front();
}
}
}
void OnPostJoin(Membership* memb) CXX11_OVERRIDE
{
LocalUser* localuser = IS_LOCAL(memb->user);
if (!localuser)
return;
if (memb->user->IsModeSet(botmode) && !dobots)
return;
HistoryList* list = m.ext.get(memb->chan);
if (!list)
return;
if ((prefixmsg) && (!batchcap.get(localuser)))
{
std::string message("Replaying up to " + ConvToStr(list->maxlen) + " lines of pre-join history");
if (list->maxtime > 0)
message.append(" from the last " + InspIRCd::DurationString(list->maxtime));
memb->WriteNotice(message);
}
time_t mintime = 0;
if (list->maxtime)
mintime = ServerInstance->Time() - list->maxtime;
SendHistory(localuser, memb->chan, list, mintime);
}
Version GetVersion() CXX11_OVERRIDE
{
return Version("Provides channel mode +H, allows for the channel message history to be replayed on join", VF_VENDOR);
}
};
MODULE_INIT(ModuleChanHistory)
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