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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2018-2020, 2022 Sadie Powell <sadie@witchery.services>
* Copyright (C) 2018 Attila Molnar <attilamolnar@hush.com>
*
* 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"
ClientProtocol::Serializer::Serializer(Module* mod, const std::string& Name)
: DataProvider(mod, "serializer/" + Name)
, evprov(mod)
{
}
bool ClientProtocol::Serializer::HandleTag(LocalUser* user, const std::string& tagname, std::string& tagvalue, TagMap& tags) const
{
// Catch and block empty tags
if (tagname.empty())
return false;
for (auto* subscriber : evprov.GetSubscribers())
{
MessageTagProvider* const tagprov = static_cast<MessageTagProvider*>(subscriber);
const ModResult res = tagprov->OnProcessTag(user, tagname, tagvalue);
if (res == MOD_RES_ALLOW)
return tags.emplace(tagname, MessageTagData(tagprov, tagvalue)).second;
else if (res == MOD_RES_DENY)
break;
}
// No module handles the tag but that's not an error
return true;
}
ClientProtocol::TagSelection ClientProtocol::Serializer::MakeTagWhitelist(LocalUser* user, const TagMap& tagmap)
{
TagSelection tagwl;
for (TagMap::const_iterator i = tagmap.begin(); i != tagmap.end(); ++i)
{
const MessageTagData& tagdata = i->second;
if (tagdata.tagprov->ShouldSendTag(user, tagdata))
tagwl.Select(tagmap, i);
}
return tagwl;
}
const ClientProtocol::SerializedMessage& ClientProtocol::Serializer::SerializeForUser(LocalUser* user, Message& msg)
{
if (!msg.msginit_done)
{
msg.msginit_done = true;
evprov.Call(&MessageTagProvider::OnPopulateTags, msg);
}
return msg.GetSerialized(Message::SerializedInfo(this, MakeTagWhitelist(user, msg.GetTags())));
}
std::string ClientProtocol::Message::EscapeTag(const std::string& value)
{
std::string ret;
ret.reserve(value.size());
for (const auto chr : value)
{
switch (chr)
{
case ' ':
ret.append("\\s");
break;
case ';':
ret.append("\\;");
break;
case '\\':
ret.append("\\\\");
break;
case '\n':
ret.append("\\n");
break;
case '\r':
ret.append("\\r");
break;
default:
ret.push_back(chr);
break;
}
}
return ret;
}
std::string ClientProtocol::Message::UnescapeTag(const std::string& value)
{
std::string ret;
ret.reserve(value.size());
for (std::string::const_iterator it = value.begin(); it != value.end(); ++it)
{
char chr = *it;
if (chr != '\\')
{
ret.push_back(chr);
continue;
}
it++;
if (it != value.end())
{
chr = *it;
switch (chr)
{
case 's':
ret.push_back(' ');
break;
case ':':
ret.push_back(';');
break;
case '\\':
ret.push_back('\\');
break;
case 'n':
ret.push_back('\n');
break;
case 'r':
ret.push_back('\r');
break;
default:
ret.push_back(chr);
break;
}
}
}
return ret;
}
const ClientProtocol::SerializedMessage& ClientProtocol::Message::GetSerialized(const SerializedInfo& serializeinfo) const
{
// First check if the serialized line they're asking for is in the cache
for (const auto& [info, msg] : serlist)
{
if (info == serializeinfo)
return msg;
}
// Not cached, generate it and put it in the cache for later use
serlist.push_back(std::make_pair(serializeinfo, serializeinfo.serializer->Serialize(*this, serializeinfo.tagwl)));
return serlist.back().second;
}
void ClientProtocol::Event::GetMessagesForUser(LocalUser* user, MessageList& messagelist)
{
if (!eventinit_done)
{
eventinit_done = true;
event->Call(&EventHook::OnEventInit, *this);
}
// Most of the time there's only a single message but in rare cases there are more
if (initialmsg)
messagelist.assign(1, initialmsg);
else
messagelist = *initialmsglist;
// Let modules modify the message list
ModResult res = event->FirstResult(&EventHook::OnPreEventSend, user, *this, messagelist);
if (res == MOD_RES_DENY)
messagelist.clear();
}
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