zipprovider.cpp

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/***************************************************************************
 *   Copyright (C) 2005-2019 by the FIFE team                              *
 *   http://www.fifengine.net                                              *
 *   This file is part of FIFE.                                            *
 *                                                                         *
 *   FIFE 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          *
 ***************************************************************************/

// Standard C++ library includes
#include <iostream>

// 3rd party library includes

// FIFE includes
// These includes are split up in two parts, separated by one empty line
// First block: files included from the FIFE root src directory
// Second block: files included from the same folder
#include "util/base/exception.h"
#include "vfs/vfs.h"

#include "zipprovider.h"
#include "zipsource.h"

namespace FIFE {
    bool ZipProvider::isReadable(const std::string& file) const {
        // File name must have a .zip extension:
        // TODO: Case sensitive?
        if (file.find(".zip") == std::string::npos)
            return false;

        // File should exist:
        if (!getVFS()->exists(file))
            return false;

        // File should start with the bytes "PK":
        // TODO: ...

        return true;
    }

    FIFE::VFSSource* ZipProvider::createSource(const std::string& file) {
        if (isReadable(file)) {
            VFSSource* source = NULL;
            if ( hasSource(file)) {
                source = m_sources[file];
            } else {
                source = new ZipSource(getVFS(), file);
                m_sources[file] = source;
            }
            return source;
        }
        else
            throw Exception("File " + file + " is not readable.");
    }

    VFSSource* ZipProvider::getSource(const std::string& path) const {
        VFSSource* source = NULL;
        if (hasSource(path)) {
            source = m_sources.find(path)->second;
        }
        return source;
    }

    bool ZipProvider::hasSource(const std::string & path) const {
        return m_sources.count(path) > 0;
    }
}