norse-blue/php-extensible-objects

<?php

declare(strict_types=1);

namespace NorseBlue\ExtensibleObjects\Guards;

use NorseBlue\ExtensibleObjects\Exceptions\MethodDefinedInClassException;
use ReflectionClass;
use ReflectionException;

/**
 * @internal
 */
final class MethodDefinedInClassGuard
{
    // @codeCoverageIgnoreStart
    private function __construct()
    {
    }
    // @codeCoverageIgnoreEnd

    /**
     * Guard against already classed defined methods.
     *
     * @throws ReflectionException
     */
    public static function enforce(string $class, string $name): void
    {
        if (! class_exists($class)) {
            throw new ReflectionException("The class '${class}' does not exist.");
        }

        $methods = array_map(
            static function ($item) {
                return $item->name;
            },
            (new ReflectionClass($class))->getMethods()
        );

        if (in_array($name, $methods, true)) {
            throw new MethodDefinedInClassException("The method '${name}' is already defined for class '${class}'.");
        }
    }
}