<?php
declare(strict_types=1);
namespace BarcodeBakery\Barcode;
use BarcodeBakery\Common\BCGArgumentException;
use BarcodeBakery\Common\BCGBarcode1D;
use BarcodeBakery\Common\BCGParseException;
class BCGmsi extends BCGBarcode1D
{
private $checksum;
public function __construct()
{
parent::__construct();
$this->keys = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9');
$this->code = array(
'01010101',
'01010110',
'01011001',
'01011010',
'01100101',
'01100110',
'01101001',
'01101010',
'10010101',
'10010110'
);
$this->setChecksum(0);
}
public function setChecksum($checksum)
{
$checksum = intval($checksum);
if ($checksum < 0 && $checksum > 2) {
throw new BCGArgumentException('The checksum must be between 0 and 2 included.', 'checksum');
}
$this->checksum = $checksum;
}
public function draw($im)
{
$this->calculateChecksum();
$this->drawChar($im, '10', true);
$c = strlen($this->text);
for ($i = 0; $i < $c; $i++) {
$this->drawChar($im, $this->findCode($this->text[$i]), true);
}
$c = count($this->checksumValue);
for ($i = 0; $i < $c; $i++) {
$this->drawChar($im, $this->findCode($this->checksumValue[$i]), true);
}
$this->drawChar($im, '010', true);
$this->drawText($im, 0, 0, $this->positionX, $this->thickness);
}
public function getDimension($w, $h)
{
$textlength = 12 * strlen($this->text);
$startlength = 3;
$checksumlength = $this->checksum * 12;
$endlength = 4;
$w += $startlength + $textlength + $checksumlength + $endlength;
$h += $this->thickness;
return parent::getDimension($w, $h);
}
protected function validate()
{
$c = strlen($this->text);
if ($c === 0) {
throw new BCGParseException('msi', 'No data has been entered.');
}
for ($i = 0; $i < $c; $i++) {
if (array_search($this->text[$i], $this->keys) === false) {
throw new BCGParseException('msi', 'The character \'' . $this->text[$i] . '\' is not allowed.');
}
}
}
protected function calculateChecksum()
{
$last_text = $this->text;
$this->checksumValue = array();
for ($i = 0; $i < $this->checksum; $i++) {
$new_text = '';
$new_number = 0;
$c = strlen($last_text);
if ($c % 2 === 0) { $starting = 1;
} else {
$starting = 0;
}
for ($j = $starting; $j < $c; $j += 2) {
$new_text .= $last_text[$j];
}
$new_text = strval(intval($new_text) * 2);
$c2 = strlen($new_text);
for ($j = 0; $j < $c2; $j++) {
$new_number += intval($new_text[$j]);
}
for ($j = ($starting === 0) ? 1 : 0; $j < $c; $j += 2) {
$new_number += intval($last_text[$j]);
}
$new_number = (10 - $new_number % 10) % 10;
$this->checksumValue[] = $new_number;
$last_text .= $new_number;
}
}
protected function processChecksum()
{
if ($this->checksumValue === false) { $this->calculateChecksum();
}
if ($this->checksumValue !== false) {
$ret = '';
$c = count($this->checksumValue);
for ($i = 0; $i < $c; $i++) {
$ret .= $this->keys[$this->checksumValue[$i]];
}
return $ret;
}
return false;
}
}