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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) 2020 (original work) Open Assessment Technologies SA; |
| 19 | */ |
| 20 | |
| 21 | declare(strict_types=1); |
| 22 | |
| 23 | namespace oat\tao\model\resources\relation; |
| 24 | |
| 25 | use ArrayIterator; |
| 26 | use IteratorAggregate; |
| 27 | use JsonSerializable; |
| 28 | |
| 29 | class ResourceRelationCollection implements IteratorAggregate, JsonSerializable |
| 30 | { |
| 31 | /** @var ResourceRelation[] */ |
| 32 | private $relations = []; |
| 33 | |
| 34 | public function __construct(ResourceRelation ...$relations) |
| 35 | { |
| 36 | foreach ($relations as $relation) { |
| 37 | $this->add($relation); |
| 38 | } |
| 39 | } |
| 40 | |
| 41 | public function getIterator(): ArrayIterator |
| 42 | { |
| 43 | return new ArrayIterator($this->relations); |
| 44 | } |
| 45 | |
| 46 | public function add(ResourceRelation $relation): self |
| 47 | { |
| 48 | $this->relations[] = $relation; |
| 49 | |
| 50 | return $this; |
| 51 | } |
| 52 | |
| 53 | public function filterNewSourceIds(array $currentSourceIds): array |
| 54 | { |
| 55 | return array_diff($currentSourceIds, $this->getSourceIds()); |
| 56 | } |
| 57 | |
| 58 | public function filterRemovedSourceIds(array $currentSourceIds): array |
| 59 | { |
| 60 | return array_diff($this->getSourceIds(), $currentSourceIds); |
| 61 | } |
| 62 | |
| 63 | public function jsonSerialize(): array |
| 64 | { |
| 65 | return $this->relations; |
| 66 | } |
| 67 | |
| 68 | private function getSourceIds(): array |
| 69 | { |
| 70 | $sourceIds = []; |
| 71 | |
| 72 | foreach ($this->relations as $relation) { |
| 73 | $sourceIds[] = $relation->getSourceId(); |
| 74 | } |
| 75 | |
| 76 | return $sourceIds; |
| 77 | } |
| 78 | } |