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<?php
/*
* This file is part of the xAPI package.
*
* (c) Christian Flothmann <christian.flothmann@xabbuh.de>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Xabbuh\XApi\Model;
/**
* The verb in a {@link Statement}.
*
* @author Christian Flothmann <christian.flothmann@xabbuh.de>
*/
final class Verb
{
private $id;
private $display;
public function __construct(IRI $id, LanguageMap $display = null)
{
$this->id = $id;
$this->display = $display;
}
/**
* Returns the verb definition reference.
*/
public function getId(): IRI
{
return $this->id;
}
/**
* Returns the human readable representation of the Verb in one or more languages.
*/
public function getDisplay(): ?LanguageMap
{
return $this->display;
}
/**
* Checks if another verb is equal.
*
* Two verbs are equal if and only if all of their properties are equal.
*/
public function equals(Verb $verb): bool
{
if (!$this->id->equals($verb->id)) {
return false;
}
if (null === $this->display && null === $verb->display) {
return true;
}
if (null !== $this->display xor null !== $verb->display) {
return false;
}
if (count($this->display) !== count($verb->getDisplay())) {
return false;
}
foreach ($this->display as $language => $value) {
if (!isset($verb->display[$language])) {
return false;
}
if ($value !== $verb->display[$language]) {
return false;
}
}
return true;
}
/**
* Tests if the Verb can be used to void a Statement.
*/
public function isVoidVerb(): bool
{
return $this->id->equals(IRI::fromString('http://adlnet.gov/expapi/verbs/voided'));
}
/**
* Creates a Verb that can be used to void a {@link Statement}.
*/
public static function createVoidVerb(): self
{
return new Verb(IRI::fromString('http://adlnet.gov/expapi/verbs/voided'));
}
}
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