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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) 2022 (original work) Open Assessment Technologies SA. |
| 19 | */ |
| 20 | |
| 21 | declare(strict_types=1); |
| 22 | |
| 23 | namespace oat\tao\model\Observer; |
| 24 | |
| 25 | use SplObserver; |
| 26 | |
| 27 | class Subject implements SubjectInterface |
| 28 | { |
| 29 | /** @var SplObserver[] */ |
| 30 | private $observers; |
| 31 | |
| 32 | /** @var array */ |
| 33 | private $data; |
| 34 | |
| 35 | public function __construct(array $data) |
| 36 | { |
| 37 | $this->data = $data; |
| 38 | |
| 39 | return $this; |
| 40 | } |
| 41 | |
| 42 | public function attach(SplObserver $observer): void |
| 43 | { |
| 44 | $this->observers[spl_object_hash($observer)] = $observer; |
| 45 | } |
| 46 | |
| 47 | public function detach(SplObserver $observer): void |
| 48 | { |
| 49 | unset($this->observers[spl_object_hash($observer)]); |
| 50 | } |
| 51 | |
| 52 | public function notify(): void |
| 53 | { |
| 54 | foreach ($this->observers as $observer) { |
| 55 | $observer->update($this); |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | public function jsonSerialize(): array |
| 60 | { |
| 61 | return $this->data; |
| 62 | } |
| 63 | } |