filecache.h

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/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
Copyright (C) 2013 Jonathan Neuschäfer <j.neuschaefer@gmx.net>
 
This program 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 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 Lesser General Public License for more details.
 
You should have received a copy of the GNU Lesser 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.
*/
 
#pragma once
 
#include <iostream>
#include <string>
#include <string_view>
 
class FileCache
{
public:
    /*
        'dir' is the file cache directory to use.
    */
    FileCache(const std::string &dir) : m_dir(dir) {}
 
    bool update(const std::string &name, std::string_view data);
    bool load(const std::string &name, std::ostream &os);
    bool exists(const std::string &name);
 
    // Copy another file on disk into the cache
    bool updateCopyFile(const std::string &name, const std::string &src_path);
 
private:
    std::string m_dir;
 
    void createDir();
    bool loadByPath(const std::string &path, std::ostream &os);
    bool updateByPath(const std::string &path, std::string_view data);
};