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 <?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) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 /**
  * @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) 2005-2015 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;
     }
 }