ion/src/Enum.php

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<?php declare(strict_types=1);
/**
* Ion
*
* Building blocks for web development
*
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* PHP version 7
*
* @package Ion
* @author Timothy J. Warren <tim@timshomepage.net>
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* @copyright 2015 - 2017 Timothy J. Warren
* @license http://www.opensource.org/licenses/mit-license.html MIT License
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* @version 2.0.0
* @link https://git.timshomepage.net/timw4mail/ion
*/
namespace Aviat\Ion;
use ReflectionClass;
/**
* Class emulating an enumeration type
*
* @method bool isValid(mixed $key)
* @method array getConstList()
*/
abstract class Enum {
use StaticInstance;
/**
* Return the list of constant values for the Enum
*
* @return array
*/
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protected static function getConstList(): array
{
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static $self;
if (is_null($self))
{
$class = \get_called_class();
$self = new $class;
}
$reflect = new ReflectionClass($self);
return $reflect->getConstants();
}
/**
* Verify that a constant value is valid
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* @param mixed $key
* @return boolean
*/
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protected static function isValid($key): bool
{
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$values = array_values(static::getConstList());
return in_array($key, $values);
}
}
// End of Enum.php