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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; under version 2 |
| 7 | * of the License (non-upgradable). |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 17 | * |
| 18 | * Copyright (c) 2017 (original work) Open Assessment Technologies SA (under the project TAO-PRODUCT); |
| 19 | * |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | namespace oat\taoLti\models\classes\ResourceLink; |
| 24 | |
| 25 | use oat\oatbox\service\ConfigurableService; |
| 26 | |
| 27 | /** |
| 28 | * Service to generate unique ids for consumers resource links, |
| 29 | * and storing this link in a keyvalue store |
| 30 | * |
| 31 | * @author joel bout (joel@taotesting.com) |
| 32 | */ |
| 33 | class KeyValueLink extends ConfigurableService implements LinkService |
| 34 | { |
| 35 | public const OPTION_PERSISTENCE = 'persistence'; |
| 36 | |
| 37 | public const PREFIX = 'lti_link_'; |
| 38 | |
| 39 | public function getLinkId($consumerId, $resourceLink): string |
| 40 | { |
| 41 | $id = $this->getPersistence()->get(self::PREFIX . $consumerId . $resourceLink); |
| 42 | if ($id == false) { |
| 43 | $id = \core_kernel_uri_UriService::singleton()->generateUri(); |
| 44 | $this->getPersistence()->set(self::PREFIX . $consumerId . $resourceLink, $id); |
| 45 | } |
| 46 | |
| 47 | return $id; |
| 48 | } |
| 49 | |
| 50 | /** |
| 51 | * @return \common_persistence_KeyValuePersistence |
| 52 | */ |
| 53 | protected function getPersistence() |
| 54 | { |
| 55 | return $this->getServiceLocator()->get(\common_persistence_Manager::SERVICE_ID) |
| 56 | ->getPersistenceById($this->getOption(self::OPTION_PERSISTENCE)); |
| 57 | } |
| 58 | } |