79 lines
2.1 KiB
PHP
79 lines
2.1 KiB
PHP
<?php
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/**
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; under version 2
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* of the License (non-upgradable).
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright (c) 2020 (original work) Open Assessment Technologies SA;
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*/
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declare(strict_types=1);
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namespace oat\tao\model\resources\relation;
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use ArrayIterator;
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use IteratorAggregate;
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use JsonSerializable;
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class ResourceRelationCollection implements IteratorAggregate, JsonSerializable
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{
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/** @var ResourceRelation[] */
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private $relations = [];
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public function __construct(ResourceRelation ...$relations)
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{
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foreach ($relations as $relation) {
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$this->add($relation);
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}
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}
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public function getIterator(): ArrayIterator
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{
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return new ArrayIterator($this->relations);
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}
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public function add(ResourceRelation $relation): self
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{
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$this->relations[] = $relation;
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return $this;
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}
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public function filterNewSourceIds(array $currentSourceIds): array
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{
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return array_diff($currentSourceIds, $this->getSourceIds());
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}
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public function filterRemovedSourceIds(array $currentSourceIds): array
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{
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return array_diff($this->getSourceIds(), $currentSourceIds);
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}
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public function jsonSerialize(): array
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{
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return $this->relations;
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}
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private function getSourceIds(): array
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{
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$sourceIds = [];
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foreach ($this->relations as $relation) {
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$sourceIds[] = $relation->getSourceId();
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}
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return $sourceIds;
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}
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}
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