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<?php
/**
* BCGcode39extended.barcode.php
*--------------------------------------------------------------------
*
* Sub-Class - Code 39 Extended
*
*--------------------------------------------------------------------
* Revision History
* v2.0.0 23 apr 2008 Jean-Sébastien Goupil New Version Update
*--------------------------------------------------------------------
* $Id: BCGcode39extended.barcode.php,v 1.3 2009/11/09 04:08:41 jsgoupil Exp $
*--------------------------------------------------------------------
* Copyright (C) Jean-Sebastien Goupil
* http://www.barcodephp.com
*/
include_once('BCGcode39.barcode.php');
class BCGcode39extended extends BCGcode39 {
const EXTENDED_1 = 39;
const EXTENDED_2 = 40;
const EXTENDED_3 = 41;
const EXTENDED_4 = 42;
protected $errorText;
protected $indcheck, $data;
/**
* Constructor
*/
public function __construct() {
parent::__construct();
// We just put parenthesis around special characters.
$this->keys[self::EXTENDED_1] = '($)';
$this->keys[self::EXTENDED_2] = '(/)';
$this->keys[self::EXTENDED_3] = '(+)';
$this->keys[self::EXTENDED_4] = '(%)';
$this->errorText = '';
}
/**
* Saves Text
*
* @param string $text
*/
public function parse($text) {
$this->text = $text;
$data = array();
$indcheck = array();
$this->errorText = ''; // Reset Error
$c = strlen($this->text);
for($i = 0; $i < $c; $i++) {
$pos = array_search($this->text[$i], $this->keys);
if($pos === false) {
// Search in extended?
$extended = $this->getExtendedVersion($this->text[$i]);
if($extended === false) {
$this->errorText .= 'Char \'' . $this->text[$i] . '\' not allowed.'."\n";
} else {
$extc = strlen($extended);
for($j = 0; $j < $extc; $j++) {
$v = $extended[$j];
if($v === '$') {
$indcheck[] = self::EXTENDED_1;
$data[] = $this->code[self::EXTENDED_1];
} elseif($v === '%') {
$indcheck[] = self::EXTENDED_2;
$data[] = $this->code[self::EXTENDED_2];
} elseif($v === '/') {
$indcheck[] = self::EXTENDED_3;
$data[] = $this->code[self::EXTENDED_3];
} elseif($v === '+') {
$indcheck[] = self::EXTENDED_4;
$data[] = $this->code[self::EXTENDED_4];
} else {
$pos2 = array_search($v, $this->keys);
$indcheck[] = $pos2;
$data[] = $this->code[$pos2];
}
}
}
} else {
$indcheck[] = $pos;
$data[] = $this->code[$pos];
}
}
$this->setData(array($indcheck, $data));
}
/**
* Draws the barcode
*
* @param resource $im
*/
public function draw(&$im) {
if(!empty($this->errorText)) {
$error = explode("\n", trim($this->errorText));
$c = count($error);
for($i = 0; $i < $c; $i++) {
$this->drawError($im, $error[$i]);
}
} else {
$c = count($this->data);
if($c === 0) {
$this->drawError($im, 'No text has been entered.');
} else {
// Starting *
$this->drawChar($im, $this->code[$this->starting], true);
for($i = 0; $i < $c; $i++) {
$this->drawChar($im, $this->data[$i], true);
}
// Checksum (rarely used)
if ($this->checksum === true) {
$this->drawChar($im, $this->code[$this->checksumValue % 43], true);
}
// Ending *
$this->drawChar($im, $this->code[$this->ending], true);
$this->drawText($im);
}
}
}
/**
* Returns the maximal size of a barcode
*
* @return int[]
*/
public function getMaxSize() {
$p = BCGBarcode1D::getMaxSize();
$textlength = 13 * count($this->data) * $this->scale;
$startlength = 13 * $this->scale;
$checksumlength = 0;
if ($this->checksum === true) {
$checksumlength = 13 * $this->scale;
}
$endlength = 13 * $this->scale;
return array($p[0] + $startlength + $textlength + $checksumlength + $endlength, $p[1]);
}
/**
* Overloaded method to calculate checksum
*/
protected function calculateChecksum() {
$this->checksumValue = 0;
$c = count($this->indcheck);
for ($i = 0; $i < $c; $i++) {
$this->checksumValue += $this->indcheck[$i];
}
$this->checksumValue = $this->checksumValue % 43;
}
/**
* Saves data into the classes.
*
* This method will save data, calculate real column number
* (if -1 was selected), the real error level (if -1 was
* selected)... It will add Padding to the end and generate
* the error codes.
*
* @param array $data
*/
private function setData($data) {
$this->indcheck = $data[0];
$this->data = $data[1];
$this->calculateChecksum();
}
private function getExtendedVersion($char) {
$o = ord($char);
if($o === 0)
return '%U';
elseif($o >= 1 && $o <= 26)
return '$' . chr($o + 64);
elseif(($o >= 33 && $o <= 44) || $o === 47 || $o === 48)
return '/' . chr($o + 32);
elseif($o >= 97 && $o <= 122)
return '+' . chr($o - 32);
elseif($o >= 27 && $o <= 31)
return '%' . chr($o + 38);
elseif($o >= 59 && $o <= 63)
return '%' . chr($o + 11);
elseif($o >= 91 && $o <= 95)
return '%' . chr($o - 16);
elseif($o >= 123 && $o <= 127)
return '%' . chr($o - 43);
elseif($o === 64)
return '%V';
elseif($o === 96)
return '%W';
elseif($o > 127)
return false;
else
return $char;
}
};
?>
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