SimplifyFuncGetArgsCountRector.php

<?php

declare (strict_types=1);
namespace Rector\CodeQuality\Rector\FuncCall;

use PhpParser\Node;
use PhpParser\Node\Expr\FuncCall;
use Rector\Rector\AbstractRector;
use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
/**
 * @see \Rector\Tests\CodeQuality\Rector\FuncCall\SimplifyFuncGetArgsCountRector\SimplifyFuncGetArgsCountRectorTest
 */
final class SimplifyFuncGetArgsCountRector extends AbstractRector
{
    public function getRuleDefinition() : RuleDefinition
    {
        return new RuleDefinition('Simplify count of func_get_args() to func_num_args()', [new CodeSample('count(func_get_args());', 'func_num_args();')]);
    }
    /**
     * @return array<class-string<Node>>
     */
    public function getNodeTypes() : array
    {
        return [FuncCall::class];
    }
    /**
     * @param FuncCall $node
     */
    public function refactor(Node $node) : ?Node
    {
        if (!$this->isName($node, 'count')) {
            return null;
        }
        if ($node->isFirstClassCallable()) {
            return null;
        }
        $firstArg = $node->getArgs()[0];
        if (!$firstArg->value instanceof FuncCall) {
            return null;
        }
        /** @var FuncCall $innerFuncCall */
        $innerFuncCall = $firstArg->value;
        if (!$this->isName($innerFuncCall, 'func_get_args')) {
            return null;
        }
        return $this->nodeFactory->createFuncCall('func_num_args');
    }
}