StrFalseComparisonResolver.php

<?php

declare(strict_types=1);

namespace Rector\Php80\NodeResolver;

use PhpParser\Node\Expr\BinaryOp\Equal;
use PhpParser\Node\Expr\BinaryOp\Identical;
use PhpParser\Node\Expr\BinaryOp\NotEqual;
use PhpParser\Node\Expr\BinaryOp\NotIdentical;
use PhpParser\Node\Expr\FuncCall;
use Rector\NodeNameResolver\NodeNameResolver;
use Rector\PhpParser\Node\Value\ValueResolver;

final readonly class StrFalseComparisonResolver
{
    public function __construct(
        private ValueResolver $valueResolver,
        private NodeNameResolver $nodeNameResolver
    ) {
    }

    /**
     * @param string[] $oldStrFuncNames
     */
    public function resolve(Identical | NotIdentical | Equal | NotEqual $expr, array $oldStrFuncNames): ?FuncCall
    {
        if ($this->valueResolver->isFalse($expr->left)) {
            if (! $expr->right instanceof FuncCall) {
                return null;
            }

            if (! $this->nodeNameResolver->isNames($expr->right, $oldStrFuncNames)) {
                return null;
            }

            return $expr->right;
        }

        if ($this->valueResolver->isFalse($expr->right)) {
            if (! $expr->left instanceof FuncCall) {
                return null;
            }

            if (! $this->nodeNameResolver->isNames($expr->left, $oldStrFuncNames)) {
                return null;
            }

            return $expr->left;
        }

        return null;
    }
}