ircrequestparser.cpp

//------------------------------------------------------------------------------
// ircrequestparser.cpp
//------------------------------------------------------------------------------
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
// 02110-1301  USA
//
//------------------------------------------------------------------------------

// Copyright (C) 2010 "Zalewa" <zalewapl@gmail.com>
//------------------------------------------------------------------------------
#include "irc/ircadapterbase.h"
#include "irc/ircclient.h"
#include "irc/ircctcpparser.h"
#include "irc/ircglobal.h"
#include "irc/ircmessageclass.h"
#include "irc/ircnetworkadapter.h"
#include "irc/ircuserinfo.h"
#include "ircrequestparser.h"
#include <QStringList>

DClass<IRCRequestParser>
{
public:
        IRCAdapterBase *adapter;
        QString output;
        QString message;
        QStringList tokens;
};

DPointered(IRCRequestParser)

IRCRequestParser::IRCRequestParser()
{
        d->adapter = nullptr;
}

IRCRequestParser::~IRCRequestParser()
{
}

IRCNetworkAdapter *IRCRequestParser::network()
{
        return d->adapter->network();
}

const QString &IRCRequestParser::output() const
{
        return d->output;
}

IRCRequestParser::IRCRequestParseResult IRCRequestParser::parse(IRCAdapterBase *pAdapter, QString input)
{
        d->adapter = pAdapter;
        d->output.clear();
        d->tokens.clear();
        d->message.clear();

        input = input.trimmed();

        if (input.isEmpty())
                return ErrorMessageEmpty;

        if (input[0] != '/')
                return ErrorInputNotPrependedWithSlash;

        input.remove(0, 1);
        if (input.isEmpty())
                return ErrorMessageEmpty;

        QStringList inputSplit = input.split(" ", Qt::SkipEmptyParts);
        d->message = inputSplit.takeFirst().toUpper();
        d->tokens = inputSplit;

        IRCRequestParser::IRCRequestParseResult result = buildOutput();
        if (result == Ok)
        {
                if (isOutputTooLong())
                        return ErrorMessageTooLong;
        }

        return result;
}

IRCRequestParser::IRCRequestParseResult IRCRequestParser::buildOutput()
{
        if (d->message == "QUIT")
        {
                d->output = QString("%1 :%2").arg(d->message, d->tokens.join(" "));
                return QuitCommand;
        }
        else if (d->message == "AWAY")
                d->output = QString("%1 :%2").arg(d->message, d->tokens.join(" "));
        else if (d->message == "PART")
        {
                if (d->tokens.isEmpty())
                        return ErrorInputInsufficientParameters;

                QString channel = d->tokens.takeFirst();
                QString farewellMessage = d->tokens.join(" ");
                d->output = QString("%1 %2 :%3").arg(d->message, channel, farewellMessage);
        }
        else if (d->message == "KICK")
        {
                if (d->tokens.length() < 2)
                        return ErrorInputInsufficientParameters;

                QString channel = d->tokens.takeFirst();
                QString user = d->tokens.takeFirst();
                QString reason = d->tokens.join(" ");
                d->output = QString("%1 %2 %3 :%4").arg(d->message, channel, user, reason);
        }
        else if (d->message == "PRIVMSG" || d->message == "NOTICE")
        {
                // Notice and Privmsg are handled the same way.
                if (d->tokens.length() < 2)
                        return ErrorInputInsufficientParameters;

                QString recipient = d->tokens.takeFirst();
                QString content = d->tokens.join(" ");
                d->output = QString("%1 %2 :%3").arg(d->message, recipient, content);
                if (isOutputTooLong())
                {
                        // If message is too long at this point for some reason,
                        // we should prevent echoing it back to the chat window as that
                        // confuses the user as to whether the message was sent or not.
                        return ErrorMessageTooLong;
                }
                if (d->message == "PRIVMSG")
                {
                        IRCCtcpParser ctcp(network(), network()->myNickname(),
                                recipient, content, IRCCtcpParser::Request);
                        if (ctcp.parse())
                        {
                                switch (ctcp.echo())
                                {
                                case IRCCtcpParser::PrintAsNormalMessage:
                                        network()->printMsgLiteral(recipient, ctcp.printable(), IRCMessageClass::Ctcp);
                                        break;
                                case IRCCtcpParser::DisplayInServerTab:
                                        network()->printWithClass(ctcp.printable(), QString(), IRCMessageClass::Ctcp);
                                        break;
                                case IRCCtcpParser::DisplayThroughGlobalMessage:
                                        network()->printToCurrentChatBox(ctcp.printable(), IRCMessageClass::Ctcp);
                                        break;
                                case IRCCtcpParser::DontShow:
                                        break;
                                }
                        }
                        else
                                emit echoPrivmsg(recipient, content);
                }
        }
        else if (d->message == "MSG")
        {
                // This is an alias to the PRIVMSG command but it is so popular
                // that I decided to implement this permanently.
                parse(d->adapter, QString("/PRIVMSG %1").arg(d->tokens.join(" ")));
        }
        else if (d->message == "QUERY")
        {
                if (!d->tokens.isEmpty())
                {
                        QString recipient = d->tokens.takeFirst();
                        if (!IRCGlobal::isChannelName(recipient))
                        {
                                IRCUserInfo userInfo(recipient, d->adapter->network());
                                emit query(userInfo.cleanNickname());
                        }
                }
        }
        else if (d->message == "ME")
        {
                QString recipient = d->adapter->recipient();
                if (recipient.isEmpty())
                        return ErrorChatWindowOnly;
                QString content = d->tokens.join(" ");
                parse(d->adapter, QString("/PRIVMSG %1 %2ACTION %3%2").arg(recipient, QChar(0x1), content));
        }
        else
                d->output = QString("%1 %2").arg(d->message, d->tokens.join(" "));

        return Ok;
}

bool IRCRequestParser::isOutputTooLong() const
{
        return d->output.toUtf8().length() > IRCClient::MAX_MESSAGE_LENGTH;
}