BCGmsi.barcode.php
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<?php
/**
*--------------------------------------------------------------------
*
* Sub-Class - MSI Plessey
*
*--------------------------------------------------------------------
* Copyright (C) Jean-Sebastien Goupil
* http://www.barcodephp.com
*/
include_once('BCGParseException.php');
include_once('BCGArgumentException.php');
include_once('BCGBarcode1D.php');
class BCGmsi extends BCGBarcode1D {
private $checksum;
/**
* Constructor.
*/
public function __construct() {
parent::__construct();
$this->keys = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9');
$this->code = array(
'01010101', /* 0 */
'01010110', /* 1 */
'01011001', /* 2 */
'01011010', /* 3 */
'01100101', /* 4 */
'01100110', /* 5 */
'01101001', /* 6 */
'01101010', /* 7 */
'10010101', /* 8 */
'10010110' /* 9 */
);
$this->setChecksum(0);
}
/**
* Sets how many checksums we display. 0 to 2.
*
* @param int $checksum
*/
public function setChecksum($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;
}
/**
* Draws the barcode.
*
* @param resource $im
*/
public function draw($im) {
// Checksum
$this->calculateChecksum();
// Starting Code
$this->drawChar($im, '10', true);
// Chars
$c = strlen($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);
}
// Ending Code
$this->drawChar($im, '010', true);
$this->drawText($im, 0, 0, $this->positionX, $this->thickness);
}
/**
* Returns the maximal size of a barcode.
*
* @param int $w
* @param int $h
* @return int[]
*/
public function getDimension($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);
}
/**
* Validates the input.
*/
protected function validate() {
$c = strlen($this->text);
if ($c === 0) {
throw new BCGParseException('msi', 'No data has been entered.');
}
// Checking if all chars are allowed
for ($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.');
}
}
}
/**
* Overloaded method to calculate checksum.
*/
protected function calculateChecksum() {
// Forming a new number
// If the original number is even, we take all even position
// If the original number is odd, we take all odd position
// 123456 = 246
// 12345 = 135
// Multiply by 2
// Add up all the digit in the result (270 : 2+7+0)
// Add up other digit not used.
// 10 - (? Modulo 10). If result = 10, change to 0
$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) { // Even
$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 .= $new_number;
}
}
/**
* Overloaded method to display the checksum.
*/
protected function processChecksum() {
if ($this->checksumValue === false) { // Calculate the checksum only once
$this->calculateChecksum();
}
if ($this->checksumValue !== false) {
$ret = '';
$c = count($this->checksumValue);
for ($i = 0; $i < $c; $i++) {
$ret .= $this->keys[$this->checksumValue[$i]];
}
return $ret;
}
return false;
}
}
?>