/*
 *   ORXONOX - the hottest 3D action shooter ever to exist
 *                    > www.orxonox.net <
 *
 *
 *   License notice:
 *
 *   This program 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; either version 2
 *   of the License, or (at your option) any later version.
 *
 *   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, write to the Free Software
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 *   Author:
 *      Fabian 'x3n' Landau
 *   Co-authors:
 *      ...
 *
 */

#include "OutputBuffer.h"

#define OUTPUTBUFFER_MAX_LINE_LENGTH 16384

namespace orxonox
{
    void OutputBuffer::registerListener(OutputBufferListener* listener)
    {
        this->listeners_.insert(this->listeners_.end(), listener);
    }

    void OutputBuffer::unregisterListener(OutputBufferListener* listener)
    {
        for (std::list<OutputBufferListener*>::iterator it = this->listeners_.begin(); it != this->listeners_.end(); )
        {
            if ((*it) == listener)
                this->listeners_.erase(it++);
            else
                ++it;
        }
    }

    OutputBuffer& OutputBuffer::operator<<(std::ostream& (*manipulator)(std::ostream&))
    {
                this->stream_ << manipulator;
                this->callListeners();
                return *this;
    }

    OutputBuffer& OutputBuffer::operator<<(std::ios& (*manipulator)(std::ios&))
    {
                this->stream_ << manipulator;
                this->callListeners();
                return *this;
    }

    OutputBuffer& OutputBuffer::operator<<(std::ios_base& (*manipulator)(std::ios_base&))
    {
                this->stream_ << manipulator;
                this->callListeners();
                return *this;
    }

    bool OutputBuffer::getLine(std::string* output)
    {
        char line[OUTPUTBUFFER_MAX_LINE_LENGTH];

        this->stream_.getline(line, OUTPUTBUFFER_MAX_LINE_LENGTH);
        (*output) = std::string(line);

        bool eof = this->stream_.eof();
        bool fail = this->stream_.fail();

        if (eof)
            this->stream_.flush();

        if (eof || fail)
            this->stream_.clear();

        return (!eof && !fail);
    }

    void OutputBuffer::callListeners()
    {
        for (std::list<OutputBufferListener*>::iterator it = this->listeners_.begin(); it != this->listeners_.end(); ++it)
            (*it)->outputChanged();
    }
}