187 lines
5.6 KiB
PHP
187 lines
5.6 KiB
PHP
<?php
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/**
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*--------------------------------------------------------------------
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*
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* Sub-Class - Code 11
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*
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*--------------------------------------------------------------------
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* @author Akhtar Khan <er.akhtarkhan@gmail.com>
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* @link http://www.codeitnow.in
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* @package https://github.com/codeitnowin/barcode-generator
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*/
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namespace CodeItNow\BarcodeBundle\Generator;
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use CodeItNow\BarcodeBundle\Generator\CINParseException;
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use CodeItNow\BarcodeBundle\Generator\CINBarcode1D;
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class CINcode11 extends CINBarcode1D {
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/**
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* Constructor.
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*/
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public function __construct() {
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parent::__construct();
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$this->keys = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '-');
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$this->code = array( // 0 added to add an extra space
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'000010', /* 0 */
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'100010', /* 1 */
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'010010', /* 2 */
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'110000', /* 3 */
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'001010', /* 4 */
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'101000', /* 5 */
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'011000', /* 6 */
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'000110', /* 7 */
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'100100', /* 8 */
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'100000', /* 9 */
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'001000' /* - */
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);
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}
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/**
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* Draws the barcode.
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*
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* @param resource $im
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*/
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public function draw($im) {
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// Starting Code
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$this->drawChar($im, '001100', true);
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// Chars
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$c = strlen($this->text);
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for ($i = 0; $i < $c; $i++) {
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$this->drawChar($im, $this->findCode($this->text[$i]), true);
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}
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// Checksum
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$this->calculateChecksum();
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$c = count($this->checksumValue);
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for ($i = 0; $i < $c; $i++) {
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$this->drawChar($im, $this->code[$this->checksumValue[$i]], true);
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}
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// Ending Code
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$this->drawChar($im, '00110', true);
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$this->drawText($im, 0, 0, $this->positionX, $this->thickness);
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}
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/**
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* Returns the maximal size of a barcode.
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*
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* @param int $w
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* @param int $h
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* @return int[]
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*/
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public function getDimension($w, $h) {
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$startlength = 8;
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$textlength = 0;
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$c = strlen($this->text);
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for ($i = 0; $i < $c; $i++) {
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$textlength += $this->getIndexLength($this->findIndex($this->text[$i]));
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}
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$checksumlength = 0;
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$this->calculateChecksum();
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$c = count($this->checksumValue);
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for ($i = 0; $i < $c; $i++) {
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$checksumlength += $this->getIndexLength($this->checksumValue[$i]);
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}
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$endlength = 7;
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$w += $startlength + $textlength + $checksumlength + $endlength;
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$h += $this->thickness;
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return parent::getDimension($w, $h);
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}
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/**
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* Validates the input.
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*/
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protected function validate() {
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$c = strlen($this->text);
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if ($c === 0) {
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throw new CINParseException('code11', 'No data has been entered.');
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}
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// Checking if all chars are allowed
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for ($i = 0; $i < $c; $i++) {
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if (array_search($this->text[$i], $this->keys) === false) {
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throw new CINParseException('code11', 'The character \'' . $this->text[$i] . '\' is not allowed.');
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}
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}
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parent::validate();
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}
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/**
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* Overloaded method to calculate checksum.
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*/
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protected function calculateChecksum() {
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// Checksum
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// First CheckSUM "C"
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// The "C" checksum character is the modulo 11 remainder of the sum of the weighted
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// value of the data characters. The weighting value starts at "1" for the right-most
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// data character, 2 for the second to last, 3 for the third-to-last, and so on up to 20.
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// After 10, the sequence wraps around back to 1.
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// Second CheckSUM "K"
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// Same as CheckSUM "C" but we count the CheckSum "C" at the end
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// After 9, the sequence wraps around back to 1.
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$sequence_multiplier = array(10, 9);
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$temp_text = $this->text;
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$this->checksumValue = array();
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for ($z = 0; $z < 2; $z++) {
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$c = strlen($temp_text);
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// We don't display the K CheckSum if the original text had a length less than 10
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if ($c <= 10 && $z === 1) {
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break;
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}
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$checksum = 0;
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for ($i = $c, $j = 0; $i > 0; $i--, $j++) {
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$multiplier = $i % $sequence_multiplier[$z];
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if ($multiplier === 0) {
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$multiplier = $sequence_multiplier[$z];
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}
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$checksum += $this->findIndex($temp_text[$j]) * $multiplier;
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}
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$this->checksumValue[$z] = $checksum % 11;
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$temp_text .= $this->keys[$this->checksumValue[$z]];
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}
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}
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/**
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* Overloaded method to display the checksum.
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*/
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protected function processChecksum() {
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if ($this->checksumValue === false) { // Calculate the checksum only once
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$this->calculateChecksum();
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}
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if ($this->checksumValue !== false) {
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$ret = '';
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$c = count($this->checksumValue);
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for ($i = 0; $i < $c; $i++) {
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$ret .= $this->keys[$this->checksumValue[$i]];
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}
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return $ret;
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}
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return false;
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}
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private function getIndexLength($index) {
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$length = 0;
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if ($index !== false) {
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$length += 6;
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$length += substr_count($this->code[$index], '1');
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}
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return $length;
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}
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}
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?>
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