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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * OperatorToFieldPrefix view helper |
| 5 | * |
| 6 | * PHP version 8 |
| 7 | * |
| 8 | * Copyright (C) Villanova University 2023. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2, |
| 12 | * as published by the Free Software Foundation. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 22 | * |
| 23 | * @category VuFind |
| 24 | * @package View_Helpers |
| 25 | * @author Demian Katz <demian.katz@villanova.edu> |
| 26 | * @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License |
| 27 | * @link https://vufind.org/wiki/development Wiki |
| 28 | */ |
| 29 | |
| 30 | namespace VuFind\View\Helper\Root; |
| 31 | |
| 32 | /** |
| 33 | * OperatorToFieldPrefix view helper |
| 34 | * |
| 35 | * @category VuFind |
| 36 | * @package View_Helpers |
| 37 | * @author Demian Katz <demian.katz@villanova.edu> |
| 38 | * @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License |
| 39 | * @link https://vufind.org/wiki/development Wiki |
| 40 | */ |
| 41 | class OperatorToFieldPrefix extends \Laminas\View\Helper\AbstractHelper |
| 42 | { |
| 43 | /** |
| 44 | * Given a Boolean operator from a filter, convert it into a VuFind URL field prefix. |
| 45 | * |
| 46 | * @param string $operator Boolean operator (AND/OR/NOT) |
| 47 | * |
| 48 | * @return string |
| 49 | */ |
| 50 | public function __invoke(string $operator): string |
| 51 | { |
| 52 | switch (strtoupper(trim($operator))) { |
| 53 | case 'OR': |
| 54 | return '~'; |
| 55 | case 'NOT': |
| 56 | return '-'; |
| 57 | } |
| 58 | // Default case -- no prefix: |
| 59 | return ''; |
| 60 | } |
| 61 | } |