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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2013-2015 Attila Molnar <attilamolnar@hush.com>
* Copyright (C) 2013, 2017-2018, 2020 Sadie Powell <sadie@witchery.services>
* Copyright (C) 2012, 2019 Robby <robby@chatbelgie.be>
* Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
* Copyright (C) 2009 Uli Schlachter <psychon@inspircd.org>
* Copyright (C) 2007-2008 Robin Burchell <robin+git@viroteck.net>
* Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
* Copyright (C) 2006-2007 Craig Edwards <brain@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/whois.h"
enum
{
// From UnrealIRCd.
RPL_WHOISHELPOP = 310,
// From ircd-ratbox.
ERR_HELPNOTFOUND = 524,
RPL_HELPSTART = 704,
RPL_HELPTXT = 705,
RPL_ENDOFHELP = 706
};
typedef std::vector<std::string> HelpMessage;
struct HelpTopic
{
// The body of the help topic.
const HelpMessage body;
// The title of the help topic.
const std::string title;
HelpTopic(const HelpMessage& Body, const std::string& Title)
: body(Body)
, title(Title)
{
}
};
typedef std::map<std::string, HelpTopic, irc::insensitive_swo> HelpMap;
class CommandHelpop : public Command
{
private:
const std::string startkey;
public:
HelpMap help;
std::string nohelp;
CommandHelpop(Module* Creator)
: Command(Creator, "HELPOP", 0)
, startkey("start")
{
syntax = "<any-text>";
}
CmdResult Handle(User* user, const Params& parameters) CXX11_OVERRIDE
{
const std::string& topic = parameters.empty() ? startkey : parameters[0];
HelpMap::const_iterator titer = help.find(topic);
if (titer == help.end())
{
user->WriteNumeric(ERR_HELPNOTFOUND, topic, nohelp);
return CMD_FAILURE;
}
const HelpTopic& entry = titer->second;
user->WriteNumeric(RPL_HELPSTART, topic, entry.title);
for (HelpMessage::const_iterator liter = entry.body.begin(); liter != entry.body.end(); ++liter)
user->WriteNumeric(RPL_HELPTXT, topic, *liter);
user->WriteNumeric(RPL_ENDOFHELP, topic, "End of /HELPOP.");
return CMD_SUCCESS;
}
};
class ModuleHelpop
: public Module
, public Whois::EventListener
{
private:
CommandHelpop cmd;
SimpleUserModeHandler ho;
public:
ModuleHelpop()
: Whois::EventListener(this)
, cmd(this)
, ho(this, "helpop", 'h', true)
{
}
void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE
{
size_t longestkey = 0;
HelpMap newhelp;
ConfigTagList tags = ServerInstance->Config->ConfTags("helpop");
if (tags.first == tags.second)
throw ModuleException("You have loaded the helpop module but not configured any help topics!");
for (ConfigIter i = tags.first; i != tags.second; ++i)
{
ConfigTag* tag = i->second;
// Attempt to read the help key.
const std::string key = tag->getString("key");
if (key.empty())
throw ModuleException(InspIRCd::Format("<helpop:key> is empty at %s", tag->getTagLocation().c_str()));
else if (irc::equals(key, "index"))
throw ModuleException(InspIRCd::Format("<helpop:key> is set to \"index\" which is reserved at %s", tag->getTagLocation().c_str()));
else if (key.length() > longestkey)
longestkey = key.length();
// Attempt to read the help value.
std::string value;
if (!tag->readString("value", value, true) || value.empty())
throw ModuleException(InspIRCd::Format("<helpop:value> is empty at %s", tag->getTagLocation().c_str()));
// Parse the help body. Empty lines are replaced with a single
// space because some clients are unable to show blank lines.
HelpMessage helpmsg;
irc::sepstream linestream(value, '\n', true);
for (std::string line; linestream.GetToken(line); )
helpmsg.push_back(line.empty() ? " " : line);
// Read the help title and store the topic.
const std::string title = tag->getString("title", InspIRCd::Format("*** Help for %s", key.c_str()), 1);
if (!newhelp.insert(std::make_pair(key, HelpTopic(helpmsg, title))).second)
{
throw ModuleException(InspIRCd::Format("<helpop> tag with duplicate key '%s' at %s",
key.c_str(), tag->getTagLocation().c_str()));
}
}
// The number of items we can fit on a page.
HelpMessage indexmsg;
size_t maxcolumns = 80 / (longestkey + 2);
for (HelpMap::iterator iter = newhelp.begin(); iter != newhelp.end(); )
{
std::string indexline;
for (size_t column = 0; column != maxcolumns; )
{
if (iter == newhelp.end())
break;
indexline.append(iter->first);
if (++column != maxcolumns)
indexline.append(longestkey - iter->first.length() + 2, ' ');
iter++;
}
indexmsg.push_back(indexline);
}
newhelp.insert(std::make_pair("index", HelpTopic(indexmsg, "List of help topics")));
cmd.help.swap(newhelp);
ConfigTag* tag = ServerInstance->Config->ConfValue("helpmsg");
cmd.nohelp = tag->getString("nohelp", "There is no help for the topic you searched for. Please try again.", 1);
}
void OnWhois(Whois::Context& whois) CXX11_OVERRIDE
{
if (whois.GetTarget()->IsModeSet(ho))
whois.SendLine(RPL_WHOISHELPOP, "is available for help.");
}
Version GetVersion() CXX11_OVERRIDE
{
return Version("Provides help to users via the HELPOP command", VF_VENDOR);
}
};
MODULE_INIT(ModuleHelpop)
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