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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2018-2024 Sadie Powell <sadie@sadiepowell.dev>
* Copyright (C) 2013-2014, 2016, 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"
#include "clientprotocolmsg.h"
enum
{
// From UnrealIRCd.
RPL_RULES = 232,
RPL_RULESTART = 308,
RPL_RULESEND = 309,
ERR_NORULES = 434
};
class CommandShowFile final
: public Command
{
enum Method
{
SF_MSG,
SF_NOTICE,
SF_NUMERIC
};
std::string introtext;
std::string endtext;
unsigned int intronumeric;
unsigned int textnumeric;
unsigned int endnumeric;
std::vector<std::string> contents;
Method method;
public:
CommandShowFile(Module* parent, const std::string& cmdname)
: Command(parent, cmdname)
{
}
CmdResult Handle(User* user, const Params& parameters) override
{
if (method == SF_NUMERIC)
{
if (!introtext.empty() && intronumeric)
user->WriteRemoteNumeric(intronumeric, introtext);
for (const auto& line : contents)
user->WriteRemoteNumeric(textnumeric, line);
if (!endtext.empty() && endnumeric)
user->WriteRemoteNumeric(endnumeric, endtext);
}
else if (IS_LOCAL(user))
{
LocalUser* const localuser = IS_LOCAL(user);
for (const auto& line : contents)
{
ClientProtocol::Messages::Privmsg msg(ClientProtocol::Messages::Privmsg::nocopy, ServerInstance->FakeClient, localuser, line, ((method == SF_MSG) ? MessageType::PRIVMSG : MessageType::NOTICE));
localuser->Send(ServerInstance->GetRFCEvents().privmsg, msg);
}
}
return CmdResult::SUCCESS;
}
void UpdateSettings(const std::shared_ptr<ConfigTag>& tag, const std::string& filecontents)
{
introtext = tag->getString("introtext", "Showing " + name);
endtext = tag->getString("endtext", "End of " + name);
intronumeric = tag->getNum<unsigned int>("intronumeric", RPL_RULESTART, 0, 999);
textnumeric = tag->getNum<unsigned int>("numeric", RPL_RULES, 0, 999);
endnumeric = tag->getNum<unsigned int>("endnumeric", RPL_RULESEND, 0, 999);
std::string smethod = tag->getString("method");
method = SF_NUMERIC;
if (smethod == "msg")
method = SF_MSG;
else if (smethod == "notice")
method = SF_NOTICE;
// Process the entry.
contents.clear();
irc::sepstream linestream(filecontents, '\n', true);
for (std::string line; linestream.GetToken(line); )
{
// Some clients can not handle receiving NOTICE/PRIVMSG/RPL_RULES
// with an empty trailing parameter so if a line is empty we
// replace it with a single space.
InspIRCd::ProcessColors(line);
contents.push_back(line.empty() ? " " : line);
}
contents.shrink_to_fit();
}
};
class ModuleShowFile final
: public Module
{
private:
std::vector<CommandShowFile*> cmds;
void ReadTag(const std::shared_ptr<ConfigTag>& tag, std::vector<CommandShowFile*>& newcmds)
{
std::string cmdname = tag->getString("name");
if (cmdname.empty())
throw ModuleException(this, "Empty value for 'name'");
std::transform(cmdname.begin(), cmdname.end(), cmdname.begin(), ::toupper);
const std::string file = tag->getString("file", cmdname);
if (file.empty())
throw ModuleException(this, "Empty value for 'file'");
auto reader = ServerInstance->Config->ReadFile(file);
if (!reader)
throw ModuleException(this, "Unable to read " + file + ": " + reader.error);
CommandShowFile* sfcmd;
Command* handler = ServerInstance->Parser.GetHandler(cmdname);
if (handler)
{
// Command exists, check if it is ours
if (handler->creator != this)
throw ModuleException(this, "Command " + cmdname + " already exists");
// This is our command, make sure we don't have the same entry twice
sfcmd = static_cast<CommandShowFile*>(handler);
if (stdalgo::isin(newcmds, sfcmd))
throw ModuleException(this, "Command " + cmdname + " is already used in a <showfile> tag");
}
else
{
// Command doesn't exist, create it
sfcmd = new CommandShowFile(this, cmdname);
ServerInstance->Modules.AddService(*sfcmd);
}
sfcmd->UpdateSettings(tag, reader.contents);
newcmds.push_back(sfcmd);
}
public:
ModuleShowFile()
: Module(VF_VENDOR, "Adds support for showing the contents of files to users when they execute a command.")
{
}
void ReadConfig(ConfigStatus& status) override
{
std::vector<CommandShowFile*> newcmds;
for (const auto& [_, tag] : ServerInstance->Config->ConfTags("showfile"))
{
try
{
ReadTag(tag, newcmds);
}
catch (const CoreException& ex)
{
ServerInstance->Logs.Warning(MODNAME, "Error: " + ex.GetReason() + " at " + tag->source.str());
}
}
// Remove all commands that were removed from the config
std::vector<CommandShowFile*> removed(cmds.size());
std::sort(newcmds.begin(), newcmds.end());
std::set_difference(cmds.begin(), cmds.end(), newcmds.begin(), newcmds.end(), removed.begin());
stdalgo::delete_all(removed);
cmds.swap(newcmds);
}
~ModuleShowFile() override
{
stdalgo::delete_all(cmds);
}
};
MODULE_INIT(ModuleShowFile)
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