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<?php
namespace Mpdf\Barcode;
/**
* Interleaved 2 of 5 barcodes.
* Compact numeric code, widely used in industry, air cargo
* Contains digits (0 to 9) and encodes the data in the width of both bars and spaces.
*/
class I25 extends \Mpdf\Barcode\AbstractBarcode implements \Mpdf\Barcode\BarcodeInterface
{
/**
* @param string $code
* @param float $topBottomMargin
* @param float $printRatio
* @param bool $checksum
*/
public function __construct($code, $topBottomMargin, $printRatio, $checksum = false, $quiet_zone_left = null, $quiet_zone_right = null)
{
$this->init($code, $printRatio, $checksum);
$this->data['nom-X'] = 0.381; // Nominal value for X-dim (bar width) in mm (2 X min. spec.)
$this->data['nom-H'] = 10; // Nominal value for Height of Full bar in mm (non-spec.)
$this->data['lightmL'] = ($quiet_zone_left !== null ? $quiet_zone_left : 10); // LEFT light margin = x X-dim (spec.)
$this->data['lightmR'] = ($quiet_zone_right !== null ? $quiet_zone_right : 10); // RIGHT light margin = x X-dim (spec.)
$this->data['lightTB'] = $topBottomMargin; // TOP/BOTTOM light margin = x X-dim (non-spec.)
}
/**
* @param string $code
* @param float $printRatio
* @param bool $checksum
*/
private function init($code, $printRatio, $checksum)
{
$chr = [
'0' => '11221',
'1' => '21112',
'2' => '12112',
'3' => '22111',
'4' => '11212',
'5' => '21211',
'6' => '12211',
'7' => '11122',
'8' => '21121',
'9' => '12121',
'A' => '11',
'Z' => '21',
];
$checkdigit = '';
if ($checksum) {
// add checksum
$checkdigit = $this->checksum($code);
$code .= $checkdigit;
}
if ((strlen($code) % 2) != 0) {
// add leading zero if code-length is odd
$code = '0' . $code;
}
// add start and stop codes
$code = 'AA' . strtolower($code) . 'ZA';
$bararray = ['code' => $code, 'maxw' => 0, 'maxh' => 1, 'bcode' => []];
$k = 0;
$clen = strlen($code);
for ($i = 0; $i < $clen; $i = ($i + 2)) {
$charBar = $code[$i];
$charSpace = $code[$i + 1];
if ((!isset($chr[$charBar])) or (!isset($chr[$charSpace]))) {
// invalid character
throw new \Mpdf\Barcode\BarcodeException(sprintf('Invalid I25 barcode value "%s"', $code));
}
// create a bar-space sequence
$seq = '';
$chrlen = strlen($chr[$charBar]);
for ($s = 0; $s < $chrlen; $s++) {
$seq .= $chr[$charBar][$s] . $chr[$charSpace][$s];
}
$seqlen = strlen($seq);
for ($j = 0; $j < $seqlen; ++$j) {
if (($j % 2) == 0) {
$t = true; // bar
} else {
$t = false; // space
}
$x = $seq[$j];
if ($x == 2) {
$w = $printRatio;
} else {
$w = 1;
}
$bararray['bcode'][$k] = ['t' => $t, 'w' => $w, 'h' => 1, 'p' => 0];
$bararray['maxw'] += $w;
++$k;
}
}
$bararray['checkdigit'] = $checkdigit;
$this->data = $bararray;
}
/**
* Checksum for standard 2 of 5 barcodes.
*
* @param string $code
* @return int
*/
private function checksum($code)
{
$len = strlen($code);
$sum = 0;
for ($i = 0; $i < $len; $i += 2) {
$sum += $code[$i];
}
$sum *= 3;
for ($i = 1; $i < $len; $i += 2) {
$sum += ($code[$i]);
}
$r = $sum % 10;
if ($r > 0) {
$r = (10 - $r);
}
return $r;
}
/**
* @inheritdoc
*/
public function getType()
{
return 'I25';
}
}
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