1<?php
2/**
3 * Zend Framework (http://framework.zend.com/)
4 *
5 * @link      http://github.com/zendframework/zf2 for the canonical source repository
6 * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
7 * @license   http://framework.zend.com/license/new-bsd New BSD License
8 */
9
10namespace Zend\Validator\Barcode;
11
12class Code39 extends AbstractAdapter
13{
14    /**
15     * @var array
16     */
17    protected $check = array(
18        '0' =>  0, '1' =>  1, '2' =>  2, '3' =>  3, '4' =>  4, '5' =>  5, '6' =>  6,
19        '7' =>  7, '8' =>  8, '9' =>  9, 'A' => 10, 'B' => 11, 'C' => 12, 'D' => 13,
20        'E' => 14, 'F' => 15, 'G' => 16, 'H' => 17, 'I' => 18, 'J' => 19, 'K' => 20,
21        'L' => 21, 'M' => 22, 'N' => 23, 'O' => 24, 'P' => 25, 'Q' => 26, 'R' => 27,
22        'S' => 28, 'T' => 29, 'U' => 30, 'V' => 31, 'W' => 32, 'X' => 33, 'Y' => 34,
23        'Z' => 35, '-' => 36, '.' => 37, ' ' => 38, '$' => 39, '/' => 40, '+' => 41,
24        '%' => 42,
25    );
26
27    /**
28     * Constructor for this barcode adapter
29     */
30    public function __construct()
31    {
32        $this->setLength(-1);
33        $this->setCharacters('0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ -.$/+%');
34        $this->setChecksum('code39');
35        $this->useChecksum(false);
36    }
37
38    /**
39     * Validates the checksum (Modulo 43)
40     *
41     * @param  string $value The barcode to validate
42     * @return bool
43     */
44    protected function code39($value)
45    {
46        $checksum = substr($value, -1, 1);
47        $value    = str_split(substr($value, 0, -1));
48        $count    = 0;
49        foreach ($value as $char) {
50            $count += $this->check[$char];
51        }
52
53        $mod = $count % 43;
54        if ($mod == $this->check[$checksum]) {
55            return true;
56        }
57
58        return false;
59    }
60}
61