rector/rules/DowngradePhp74/Rector/Coalesce/DowngradeNullCoalescingOperatorRector.php

<?php

declare (strict_types=1);
namespace Rector\DowngradePhp74\Rector\Coalesce;

use PhpParser\Node;
use PhpParser\Node\Expr\Assign;
use PhpParser\Node\Expr\AssignOp\Coalesce as AssignCoalesce;
use PhpParser\Node\Expr\BinaryOp\Coalesce;
use Rector\Core\Rector\AbstractRector;
use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
/**
 * @changelog https://wiki.php.net/rfc/null_coalesce_equal_operator
 * @see \Rector\Tests\DowngradePhp74\Rector\Coalesce\DowngradeNullCoalescingOperatorRector\DowngradeNullCoalescingOperatorRectorTest
 */
final class DowngradeNullCoalescingOperatorRector extends \Rector\Core\Rector\AbstractRector
{
    public function getRuleDefinition() : \Symplify\RuleDocGenerator\ValueObject\RuleDefinition
    {
        return new \Symplify\RuleDocGenerator\ValueObject\RuleDefinition('Remove null coalescing operator ??=', [new \Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample(<<<'CODE_SAMPLE'
$array = [];
$array['user_id'] ??= 'value';
CODE_SAMPLE
, <<<'CODE_SAMPLE'
$array = [];
$array['user_id'] = $array['user_id'] ?? 'value';
CODE_SAMPLE
)]);
    }
    /**
     * @return array<class-string<Node>>
     */
    public function getNodeTypes() : array
    {
        return [\PhpParser\Node\Expr\AssignOp\Coalesce::class];
    }
    /**
     * @param AssignCoalesce $node
     */
    public function refactor(\PhpParser\Node $node) : \PhpParser\Node\Expr\Assign
    {
        return new \PhpParser\Node\Expr\Assign($node->var, new \PhpParser\Node\Expr\BinaryOp\Coalesce($node->var, $node->expr));
    }
}