| 1 | <?php |
| 2 | /* |
| 3 | * Barcode Class |
| 4 | * Copyright (C) 2011 Thomas Mudrunka |
| 5 | * |
| 6 | * This program is free software: you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU Affero General Public License as |
| 8 | * published by the Free Software Foundation, either version 3 of the |
| 9 | * License, or (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU Affero General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Affero General Public License |
| 17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 18 | */ |
| 19 | |
| 20 | /** |
| 21 | * Trida implementuje funkce pro praci s carovymi kody |
| 22 | * |
| 23 | * @package Barcode |
| 24 | * @author Tomas Mudrunka |
| 25 | */ |
| 26 | class Barcode { |
| 27 | static function test() { |
| 28 | system('barcode -b test | convert - /dev/null', $ret); |
| 29 | if($ret == 0) { |
| 30 | return true; |
| 31 | } else { |
| 32 | trigger_error('Barcode-related features are disabled. Please install GNU Barcode and ImageMagick.'); |
| 33 | return false; |
| 34 | } |
| 35 | } |
| 36 | |
| 37 | static function generate_barcode($string='EXAMPLE', $convert='png', $enctype='code128b') { |
| 38 | $string = escapeshellarg($string); |
| 39 | $enctype = escapeshellarg($enctype); |
| 40 | $convert = $convert ? " | convert - -crop 0x60+0+30\\! -background white -flatten $convert:-" : ''; |
| 41 | return shell_exec("barcode -e $enctype -E -b $string$convert"); |
| 42 | } |
| 43 | |
| 44 | static function cached_barcode($string='EXAMPLE', $convert='png', $enctype='code128b') { |
| 45 | $ext = $convert ? $convert : 'ps'; |
| 46 | $filename=DIR_BARCODES."/$enctype-".urlencode($string).".$ext"; |
| 47 | if(is_file($filename)) return file_get_contents($filename); |
| 48 | $barcode = self::generate_barcode($string,$convert,$enctype); |
| 49 | file_put_contents($filename,$barcode); |
| 50 | return $barcode; |
| 51 | } |
| 52 | |
| 53 | static function download_barcode($string='EXAMPLE', $convert='png', $enctype='code128b') { |
| 54 | if(self::test()) { |
| 55 | header('Content-Type: image/png'); |
| 56 | header('Cache-Control: max-age=604800, public'); //1week caching |
| 57 | } else die(); |
| 58 | die(self::cached_barcode($string,$convert,$enctype)); |
| 59 | } |
| 60 | } |