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<?php
/**
*--------------------------------------------------------------------
*
* Sub-Class - UPC Supplemental Barcode 2 digits
*
* Working with UPC-A, UPC-E, EAN-13, EAN-8
* This includes 5 digits (normaly for suggested retail price)
* Must be placed next to UPC or EAN Code
* If 90000 -> No suggested Retail Price
* If 99991 -> Book Complimentary (normally free)
* If 90001 to 98999 -> Internal Purpose of Publisher
* If 99990 -> Used by the National Association of College Stores to mark used books
* If 0xxxx -> Price Expressed in British Pounds (xx.xx)
* If 5xxxx -> Price Expressed in U.S. dollars (US$xx.xx)
*
*--------------------------------------------------------------------
* Copyright (C) Jean-Sebastien Goupil
* http://www.barcodephp.com
*/
include_once('BCGParseException.php');
include_once('BCGBarcode1D.php');
include_once('BCGLabel.php');
class BCGupcext5 extends BCGBarcode1D {
protected $codeParity = array();
/**
* Constructor.
*/
public function __construct() {
parent::__construct();
$this->keys = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9');
$this->code = array(
'2100', /* 0 */
'1110', /* 1 */
'1011', /* 2 */
'0300', /* 3 */
'0021', /* 4 */
'0120', /* 5 */
'0003', /* 6 */
'0201', /* 7 */
'0102', /* 8 */
'2001' /* 9 */
);
// Parity, 0=Odd, 1=Even. Depending Checksum
$this->codeParity = array(
array(1, 1, 0, 0, 0), /* 0 */
array(1, 0, 1, 0, 0), /* 1 */
array(1, 0, 0, 1, 0), /* 2 */
array(1, 0, 0, 0, 1), /* 3 */
array(0, 1, 1, 0, 0), /* 4 */
array(0, 0, 1, 1, 0), /* 5 */
array(0, 0, 0, 1, 1), /* 6 */
array(0, 1, 0, 1, 0), /* 7 */
array(0, 1, 0, 0, 1), /* 8 */
array(0, 0, 1, 0, 1) /* 9 */
);
}
/**
* Draws the barcode.
*
* @param resource $im
*/
public function draw($im) {
// Checksum
$this->calculateChecksum();
// Starting Code
$this->drawChar($im, '001', true);
// Code
for ($i = 0; $i < 5; $i++) {
$this->drawChar($im, self::inverse($this->findCode($this->text[$i]), $this->codeParity[$this->checksumValue][$i]), false);
if ($i < 4) {
$this->drawChar($im, '00', false); // Inter-char
}
}
$this->drawText($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) {
$startlength = 4;
$textlength = 5 * 7;
$intercharlength = 2 * 4;
$w += $startlength + $textlength + $intercharlength;
$h += $this->thickness;
return parent::getDimension($w, $h);
}
/**
* Adds the default label.
*/
protected function addDefaultLabel() {
parent::addDefaultLabel();
if ($this->defaultLabel !== null) {
$this->defaultLabel->setPosition(BCGLabel::POSITION_TOP);
}
}
/**
* Validates the input.
*/
protected function validate() {
$c = strlen($this->text);
if ($c === 0) {
throw new BCGParseException('upcext5', 'No data has been entered.');
}
// Checking if all chars are allowed
for ($i = 0; $i < $c; $i++) {
if (array_search($this->text[$i], $this->keys) === false) {
throw new BCGParseException('upcext5', 'The character \'' . $this->text[$i] . '\' is not allowed.');
}
}
// Must contain 5 digits
if ($c !== 5) {
throw new BCGParseException('upcext5', 'Must contain 5 digits.');
}
parent::validate();
}
/**
* Overloaded method to calculate checksum.
*/
protected function calculateChecksum() {
// Calculating Checksum
// Consider the right-most digit of the message to be in an "odd" position,
// and assign odd/even to each character moving from right to left
// Odd Position = 3, Even Position = 9
// Multiply it by the number
// Add all of that and do ?mod10
$odd = true;
$this->checksumValue = 0;
$c = strlen($this->text);
for ($i = $c; $i > 0; $i--) {
if ($odd === true) {
$multiplier = 3;
$odd = false;
} else {
$multiplier = 9;
$odd = true;
}
if (!isset($this->keys[$this->text[$i - 1]])) {
return;
}
$this->checksumValue += $this->keys[$this->text[$i - 1]] * $multiplier;
}
$this->checksumValue = $this->checksumValue % 10;
}
/**
* Overloaded method to display the checksum.
*/
protected function processChecksum() {
if ($this->checksumValue === false) { // Calculate the checksum only once
$this->calculateChecksum();
}
if ($this->checksumValue !== false) {
return $this->keys[$this->checksumValue];
}
return false;
}
/**
* Inverses the string when the $inverse parameter is equal to 1.
*
* @param string $text
* @param int $inverse
* @return string
*/
private static function inverse($text, $inverse = 1) {
if ($inverse === 1) {
$text = strrev($text);
}
return $text;
}
}
?>