<?php

/**

 * Zend Framework

 *

 * LICENSE

 *

 * This source file is subject to the new BSD license that is bundled

 * with this package in the file LICENSE.txt.

 * It is also available through the world-wide-web at this URL:

 * http://framework.zend.com/license/new-bsd

 * If you did not receive a copy of the license and are unable to

 * obtain it through the world-wide-web, please send an email

 * to license@zend.com so we can send you a copy immediately.

 *

 * @category   Zend

 * @package    Zend_Barcode

 * @subpackage Object

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 * @version    $Id: Code39.php 23398 2010-11-19 17:17:05Z mikaelkael $

 */

/**

 * @see Zend_Barcode_Object_ObjectAbstract

 */

require_once 'Zend/Barcode/Object/ObjectAbstract.php';

/**

 * @see 'Zend_Validate_Barcode'

 */

require_once 'Zend/Validate/Barcode.php';

/**

 * Class for generate Code39 barcode

 *

 * @category   Zend

 * @package    Zend_Barcode

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_Barcode_Object_Code39 extends Zend_Barcode_Object_ObjectAbstract

{

    /**

     * Coding map

     * @var array

     */

    protected $_codingMap = array(

        '0' => '000110100',

        '1' => '100100001',

        '2' => '001100001',

        '3' => '101100000',

        '4' => '000110001',

        '5' => '100110000',

        '6' => '001110000',

        '7' => '000100101',

        '8' => '100100100',

        '9' => '001100100',

        'A' => '100001001',

        'B' => '001001001',

        'C' => '101001000',

        'D' => '000011001',

        'E' => '100011000',

        'F' => '001011000',

        'G' => '000001101',

        'H' => '100001100',

        'I' => '001001100',

        'J' => '000011100',

        'K' => '100000011',

        'L' => '001000011',

        'M' => '101000010',

        'N' => '000010011',

        'O' => '100010010',

        'P' => '001010010',

        'Q' => '000000111',

        'R' => '100000110',

        'S' => '001000110',

        'T' => '000010110',

        'U' => '110000001',

        'V' => '011000001',

        'W' => '111000000',

        'X' => '010010001',

        'Y' => '110010000',

        'Z' => '011010000',

        '-' => '010000101',

        '.' => '110000100',

        ' ' => '011000100',

        '$' => '010101000',

        '/' => '010100010',

        '+' => '010001010',

        '%' => '000101010',

        '*' => '010010100',

    );

    /**

     * Partial check of Code39 barcode

     * @return void

     */

    protected function _checkParams()

    {

        $this->_checkRatio();

    }

    /**

     * Width of the barcode (in pixels)

     * @return int

     */

    protected function _calculateBarcodeWidth()

    {

        $quietZone       = $this->getQuietZone();

        $characterLength = (6 * $this->_barThinWidth + 3 * $this->_barThickWidth + 1) * $this->_factor;

        $encodedData     = strlen($this->getText()) * $characterLength - $this->_factor;

        return $quietZone + $encodedData + $quietZone;

    }

    /**

     * Set text to encode

     * @param string $value

     * @return Zend_Barcode_Object

     */

    public function setText($value)

    {

        $this->_text = $value;

        return $this;

    }

    /**

     * Retrieve text to display

     * @return string

     */

    public function getText()

    {

        return '*' . parent::getText() . '*';

    }

    /**

     * Retrieve text to display

     * @return string

     */

    public function getTextToDisplay()

    {

        $text = parent::getTextToDisplay();

        if (substr($text, 0, 1) != '*' && substr($text, -1) != '*') {

            return '*' . $text . '*';

        } else {

            return $text;

        }

    }

    /**

     * Prepare array to draw barcode

     * @return array

     */

    protected function _prepareBarcode()

    {

        $text         = str_split($this->getText());

        $barcodeTable = array();

        foreach ($text as $char) {

            $barcodeChar = str_split($this->_codingMap[$char]);

            $visible     = true;

            foreach ($barcodeChar as $c) {

                /* visible, width, top, length */

                $width          = $c ? $this->_barThickWidth : $this->_barThinWidth;

                $barcodeTable[] = array((int) $visible, $width, 0, 1);

                $visible = ! $visible;

            }

            $barcodeTable[] = array(0 , 1);

        }

        return $barcodeTable;

    }

    /**

     * Get barcode checksum

     *

     * @param  string $text

     * @return int

     */

    public function getChecksum($text)

    {

        $this->_checkText($text);

        $text     = str_split($text);

        $charset  = array_flip(array_keys($this->_codingMap));

        $checksum = 0;

        foreach ($text as $character) {

            $checksum += $charset[$character];

        }

        return array_search(($checksum % 43), $charset);

    }

}