identiconpp.hpp

/*  This file is part of identiconpp.
 *  Copyright © 2018, 2019 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 IDENTICONPP_HPP
#define IDENTICONPP_HPP

#include <cstdint>
#include <string>
#include <vector>
#include <array>
#include <Magick++/Image.h>

using std::uint8_t;
using std::uint16_t;
using std::string;
using std::vector;
using std::array;

class Identiconpp
{
public:
    friend class Testiconpp;
    enum class algorithm
    {
        ltr_symmetric,
        ltr_asymmetric,
        sigil
    };

    explicit Identiconpp(const uint8_t columns, const uint8_t rows,
                         algorithm type = algorithm::ltr_symmetric,
                         const string &background = "ffffffff",
                         const vector<string> &foreground = { "000000ff" },
                         const array<uint8_t, 2> &padding = { 0, 0 });

    Magick::Image generate(const string &digest, const uint16_t width = 100);

    const string generate_base64(const string &magick, const string &digest,
                                 const uint16_t width = 100);

private:
    const uint8_t _rows;
    const uint8_t _columns;
    const algorithm _type;
    const string _background;
    const vector<string> _foreground;
    const array<uint8_t, 2> _padding;

    Magick::Image generate_ltr_symmetric(const string &digest);

    Magick::Image generate_ltr_asymmetric(const string &digest);

    Magick::Image generate_sigil(const string &digest);

    void check_entropy(const string &digest, algorithm type);

    bool get_bit(const uint16_t bit, const string &digest);

    Magick::Color get_color(const uint16_t firstbit, const string &digest);

    static bool not_hex(const char c);

    void check_color(const string &color);
};

#endif  // IDENTICONPP_HPP