<?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: Postnet.php 20096 2010-01-06 02:05:09Z bkarwin $

 */

/**

 * @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 Postnet 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_Postnet extends Zend_Barcode_Object_ObjectAbstract

{

    /**

     * Coding map

     * - 0 = half bar

     * - 1 = complete bar

     * @var array

     */

    protected $_codingMap = array(

        0 => "11000",

        1 => "00011",

        2 => "00101",

        3 => "00110",

        4 => "01001",

        5 => "01010",

        6 => "01100",

        7 => "10001",

        8 => "10010",

        9 => "10100"

    );

    /**

     * Default options for Postnet barcode

     * @return void

     */

    protected function _getDefaultOptions()

    {

        $this->_barThinWidth = 2;

        $this->_barHeight = 20;

        $this->_drawText = false;

        $this->_stretchText = true;

        $this->_mandatoryChecksum = true;

    }

    /**

     * Width of the barcode (in pixels)

     * @return integer

     */

    protected function _calculateBarcodeWidth()

    {

        $quietZone       = $this->getQuietZone();

        $startCharacter  = (2 * $this->_barThinWidth) * $this->_factor;

        $stopCharacter   = (1 * $this->_barThinWidth) * $this->_factor;

        $encodedData     = (10 * $this->_barThinWidth) * $this->_factor * strlen($this->getText());

        return $quietZone + $startCharacter + $encodedData + $stopCharacter + $quietZone;

    }

    /**

     * Partial check of interleaved Postnet barcode

     * @return void

     */

    protected function _checkParams()

    {}

    /**

     * Prepare array to draw barcode

     * @return array

     */

    protected function _prepareBarcode()

    {

        $barcodeTable = array();

        // Start character (1)

        $barcodeTable[] = array(1 , $this->_barThinWidth , 0 , 1);

        $barcodeTable[] = array(0 , $this->_barThinWidth , 0 , 1);

        // Text to encode

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

        foreach ($textTable as $char) {

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

            foreach ($bars as $b) {

                $barcodeTable[] = array(1 , $this->_barThinWidth , 0.5 - $b * 0.5 , 1);

                $barcodeTable[] = array(0 , $this->_barThinWidth , 0 , 1);

            }

        }

        // Stop character (1)

        $barcodeTable[] = array(1 , $this->_barThinWidth , 0 , 1);

        return $barcodeTable;

    }

    /**

     * Get barcode checksum

     *

     * @param  string $text

     * @return int

     */

    public function getChecksum($text)

    {

        $this->_checkText($text);

        $sum = array_sum(str_split($text));

        $checksum = (10 - ($sum % 10)) % 10;

        return $checksum;

    }

}