/*  This file is part of libravatarserv.
 *  Copyright © 2018 tastytea <tastytea@tastytea.de>
 *
 *  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, version 3.
 *
 *  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/>.
 */

#ifndef LIBRAVATARSERV_HPP
#define LIBRAVATARSERV_HPP

#if __cplusplus >= 201703L
    #include <filesystem>
#else
    #include <experimental/filesystem>
#endif
#include <string>
#include <map>
#include <Magick++/Image.h>

#if __cplusplus >= 201703L
    namespace fs = std::filesystem;
#else
    namespace fs = std::experimental::filesystem;
#endif
using std::string;
using std::uint16_t;
using std::uint8_t;
using std::int8_t;

int main();

namespace settings
{   // settings.cpp
    extern fs::path avatar_dir;
    extern struct Settings
    {
        string default_fallback = "404";
        bool redirect_nofallback = false;
        bool redirect_nouser = false;
    } settings;

    bool find_avatar_dir();
    void read_settings();
}

namespace http  // http.cpp
{
    struct Request
    {
        const string digest;
        const int16_t size = 0;
        string fallback;
    };

    const Request parse_request(const string &request);
    const string get_parameter(const string &request, const string &parameter);
    void send_redirect(const Request &request);
}

namespace hash  // hash.cpp
{
    extern std::map<const string, const string> table;

    const string md5(const string &text);
    const string sha256(const string &text);
    bool fill_table();
    bool is_valid(const string &digest);
    bool not_hex(const char &c);
}

namespace image // image.cpp
{
    struct Image
    {
        uint8_t error = 0;
        Magick::Image image;
    };

    const Image get(const string &digest, const uint16_t size);
    void write(Image &image);
    Image identicon(const string &digest);
}

#endif  // LIBRAVATARSERV_HPP