<?php

class C128
{
    private $orientation = 0;
    private $size        = 0;
    private $content     = 0;

    public function __construct(string $content = '', int $size = 20, int $orientation = 0)
    {
        $this->content     = $content;
        $this->size        = $size;
        $this->orientation = $orientation;
    }

    public function setOrientation(int $orientation)
    {
        $this->orientation = $orientation;
    }

    public function setContent(string $content)
    {
        $this->content = $content;
    }

    public function setSize(int $size)
    {
        $this->size = $size;
    }

    public function get()
    {
        $codeString = '';
        $chksum     = 104;

        /* Order is critical for checksum */
        $codeArray = [
            ' '       => '212222', '!' => '222122', '\'' => '222221', '#' => '121223', '$' => '121322', '%' => '131222',
            '&'       => '122213', '\'' => '122312', '(' => '132212', ')' => '221213', '*' => '221312', '+' => '231212',
            ','       => '112232', '-' => '122132', '.' => '122231', '/' => '113222', '0' => '123122', '1' => '123221',
            '2'       => '223211', '3' => '221132', '4' => '221231', '5' => '213212', '6' => '223112', '7' => '312131',
            '8'       => '311222', '9' => '321122', ':' => '321221', ';' => '312212', '<' => '322112', '=' => '322211',
            '>'       => '212123', '?' => '212321', '@' => '232121', 'A' => '111323', 'B' => '131123', 'C' => '131321',
            'D'       => '112313', 'E' => '132113', 'F' => '132311', 'G' => '211313', 'H' => '231113', 'I' => '231311',
            'J'       => '112133', 'K' => '112331', 'L' => '132131', 'M' => '113123', 'N' => '113321', 'O' => '133121',
            'P'       => '313121', 'Q' => '211331', 'R' => '231131', 'S' => '213113', 'T' => '213311', 'U' => '213131',
            'V'       => '311123', 'W' => '311321', 'X' => '331121', 'Y' => '312113', 'Z' => '312311', '[' => '332111',
            '\\'      => '314111', ']' => '221411', '^' => '431111', '_' => '111224', '\`' => '111422', 'a' => '121124',
            'b'       => '121421', 'c' => '141122', 'd' => '141221', 'e' => '112214', 'f' => '112412', 'g' => '122114',
            'h'       => '122411', 'i' => '142112', 'j' => '142211', 'k' => '241211', 'l' => '221114', 'm' => '413111',
            'n'       => '241112', 'o' => '134111', 'p' => '111242', 'q' => '121142', 'r' => '121241', 's' => '114212',
            't'       => '124112', 'u' => '124211', 'v' => '411212', 'w' => '421112', 'x' => '421211', 'y' => '212141',
            'z'       => '214121', '{' => '412121', '|' => '111143', '}' => '111341', '~' => '131141', 'DEL' => '114113',
            'FNC 3'   => '114311', 'FNC 2' => '411113', 'SHIFT' => '411311', 'CODE C' => '113141', 'FNC 4' => '114131',
            'CODE A'  => '311141', 'FNC 1' => '411131', 'Start A' => '211412', 'Start B' => '211214',
            'Start C' => '211232', 'Stop' => '2331112',
        ];

        $codeKeys   = array_keys($codeArray);
        $codeValues = array_flip($codeKeys);

        for ($X = 1; $X <= strlen($this->content); $X++) {
            $activeKey = substr($this->content, ($X - 1), 1);
            $codeString .= $codeArray[$activeKey];
            $chksum = ($chksum + ($codeValues[$activeKey] * $X));
        }
        $codeString .= $codeArray[$codeKeys[($chksum - (intval($chksum / 103) * 103))]];
        $codeString = '211214' . $codeString . '2331112';
        $codeLength = 20;

        for ($i = 1; $i <= strlen($codeString); $i++) {
            $codeLength = $codeLength + (integer) (substr($codeString, ($i - 1), 1));
        }

        if (strtolower($this->orientation) == 'horizontal') {
            $imgWidth  = $codeLength;
            $imgHeight = $this->size;
        } else {
            $imgWidth  = $this->size;
            $imgHeight = $codeLength;
        }

        $image    = imagecreate($imgWidth, $imgHeight);
        $black    = imagecolorallocate($image, 0, 0, 0);
        $white    = imagecolorallocate($image, 255, 255, 255);
        $location = 0;
        imagefill($image, 0, 0, $white);

        for ($position = 1; $position <= strlen($codeString); $position++) {
            $cur_size = $location + (substr($codeString, ($position - 1), 1));

            if (strtolower($this->orientation) == 'horizontal') {
                imagefilledrectangle($image, $location, 0, $cur_size, $imgHeight, ($position % 2 == 0 ? $white : $black));
            } else {
                imagefilledrectangle($image, 0, $location, $imgWidth, $cur_size, ($position % 2 == 0 ? $white : $black));
            }

            $location = $cur_size;
        }

        return $image;
    }
}