118 lines
3.3 KiB
PHP
118 lines
3.3 KiB
PHP
<?php
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/*
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* This file is part of the xAPI package.
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*
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* (c) Christian Flothmann <christian.flothmann@xabbuh.de>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Xabbuh\XApi\Model;
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use Xabbuh\XApi\Common\Exception\UnsupportedOperationException;
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/**
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* xAPI statement extensions.
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*
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* @author Christian Flothmann <christian.flothmann@xabbuh.de>
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*/
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final class Extensions implements \ArrayAccess
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{
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private $extensions;
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public function __construct(\SplObjectStorage $extensions = null)
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{
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$this->extensions = array();
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if (null !== $extensions) {
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foreach ($extensions as $iri) {
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if (!$iri instanceof IRI) {
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throw new \InvalidArgumentException(sprintf('Expected an IRI instance as key (got %s).', is_object($iri) ? get_class($iri) : gettype($iri)));
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}
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$this->extensions[$iri->getValue()] = $extensions[$iri];
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}
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}
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}
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/**
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* {@inheritdoc}
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*/
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public function offsetExists($offset): bool
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{
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if (!$offset instanceof IRI) {
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throw new \InvalidArgumentException(sprintf('Expected an IRI instance as key (got %s).', is_object($offset) ? get_class($offset) : gettype($offset)));
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}
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return isset($this->extensions[$offset->getValue()]);
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}
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/**
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* {@inheritdoc}
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*/
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public function offsetGet($offset)
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{
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if (!$offset instanceof IRI) {
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throw new \InvalidArgumentException(sprintf('Expected an IRI instance as key (got %s).', is_object($offset) ? get_class($offset) : gettype($offset)));
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}
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if (!isset($this->extensions[$offset->getValue()])) {
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throw new \InvalidArgumentException(sprintf('No extension for key "%s" registered.', $offset->getValue()));
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}
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return $this->extensions[$offset->getValue()];
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}
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/**
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* {@inheritdoc}
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*
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* @throws UnsupportedOperationException Statement extensions are immutable
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*/
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public function offsetSet($offset, $value): void
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{
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throw new UnsupportedOperationException('xAPI statement extensions are immutable.');
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}
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/**
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* {@inheritdoc}
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*
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* @throws UnsupportedOperationException Statement extensions are immutable
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*/
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public function offsetUnset($offset): void
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{
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throw new UnsupportedOperationException('xAPI statement extensions are immutable.');
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}
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public function getExtensions(): \SplObjectStorage
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{
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$extensions = new \SplObjectStorage();
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foreach ($this->extensions as $iri => $value) {
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$extensions->attach(IRI::fromString($iri), $value);
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}
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return $extensions;
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}
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public function equals(Extensions $otherExtensions): bool
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{
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if (count($this->extensions) !== count($otherExtensions->extensions)) {
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return false;
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}
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foreach ($this->extensions as $iri => $value) {
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if (!array_key_exists($iri, $otherExtensions->extensions)) {
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return false;
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}
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if ($this->extensions[$iri] != $otherExtensions->extensions[$iri]) {
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return false;
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}
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}
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return true;
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}
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}
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