205 lines
5.9 KiB
PHP
205 lines
5.9 KiB
PHP
<?php
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/**
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*--------------------------------------------------------------------
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*
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* Sub-Class - Interleaved 2 of 5
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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 CINi25 extends CINBarcode1D {
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private $checksum;
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private $ratio;
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/**
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* Constructor.
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*/
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public function __construct() {
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parent::__construct();
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$this->keys = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9');
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$this->code = array(
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'00110', /* 0 */
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'10001', /* 1 */
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'01001', /* 2 */
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'11000', /* 3 */
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'00101', /* 4 */
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'10100', /* 5 */
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'01100', /* 6 */
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'00011', /* 7 */
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'10010', /* 8 */
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'01010' /* 9 */
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);
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$this->setChecksum(false);
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$this->setRatio(2);
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}
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/**
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* Sets the checksum.
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*
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* @param bool $checksum
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*/
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public function setChecksum($checksum) {
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$this->checksum = (bool)$checksum;
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}
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/**
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* Sets the ratio of the black bar compared to the white bars.
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*
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* @param int $ratio
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*/
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public function setRatio($ratio) {
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$this->ratio = $ratio;
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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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$temp_text = $this->text;
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// Checksum
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if ($this->checksum === true) {
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$this->calculateChecksum();
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$temp_text .= $this->keys[$this->checksumValue];
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}
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// Starting Code
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$this->drawChar($im, '0000', true);
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// Chars
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$c = strlen($temp_text);
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for ($i = 0; $i < $c; $i += 2) {
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$temp_bar = '';
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$c2 = strlen($this->findCode($temp_text[$i]));
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for ($j = 0; $j < $c2; $j++) {
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$temp_bar .= substr($this->findCode($temp_text[$i]), $j, 1);
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$temp_bar .= substr($this->findCode($temp_text[$i + 1]), $j, 1);
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}
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$this->drawChar($im, $this->changeBars($temp_bar), true);
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}
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// Ending Code
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$this->drawChar($im, $this->changeBars('100'), true);
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$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, $h) {
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$textlength = (3 + ($this->ratio + 1) * 2) * strlen($this->text);
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$startlength = 4;
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$checksumlength = 0;
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if ($this->checksum === true) {
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$checksumlength = (3 + ($this->ratio + 1) * 2);
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}
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$endlength = 2 + ($this->ratio + 1);
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$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('i25', '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('i25', 'The character \'' . $this->text[$i] . '\' is not allowed.');
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}
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}
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// Must be even
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if ($c % 2 !== 0 && $this->checksum === false) {
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throw new CINParseException('i25', 'i25 must contain an even amount of digits if checksum is false.');
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} elseif ($c % 2 === 0 && $this->checksum === true) {
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throw new CINParseException('i25', 'i25 must contain an odd amount of digits if checksum is true.');
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}
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parent::validate();
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}
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/**
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* Overloaded method to calculate checksum.
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*/
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protected function calculateChecksum() {
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// Calculating Checksum
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// Consider the right-most digit of the message to be in an "even" position,
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// and assign odd/even to each character moving from right to left
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// Even Position = 3, Odd Position = 1
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// Multiply it by the number
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// Add all of that and do 10-(?mod10)
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$even = true;
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$this->checksumValue = 0;
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$c = strlen($this->text);
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for ($i = $c; $i > 0; $i--) {
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if ($even === true) {
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$multiplier = 3;
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$even = false;
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} else {
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$multiplier = 1;
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$even = true;
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}
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$this->checksumValue += $this->keys[$this->text[$i - 1]] * $multiplier;
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}
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$this->checksumValue = (10 - $this->checksumValue % 10) % 10;
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}
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/**
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* Overloaded method to display the checksum.
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*/
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protected function processChecksum() {
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if ($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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return $this->keys[$this->checksumValue];
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}
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return false;
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}
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/**
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* Changes the size of the bars based on the ratio
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*
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* @param string $in
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* @return string
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*/
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private function changeBars($in) {
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if ($this->ratio > 1) {
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$c = strlen($in);
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for ($i = 0; $i < $c; $i++) {
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$in[$i] = $in[$i] === '1' ? $this->ratio : $in[$i];
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}
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}
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return $in;
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}
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}
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?>
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