Subversion-Projekte lars-tiefland.laravel_shop

<?php

/*

 * This file is part of Psy Shell.

 *

 * (c) 2012-2023 Justin Hileman

 *

 * For the full copyright and license information, please view the LICENSE

 * file that was distributed with this source code.

 */

namespace Psy\CodeCleaner;

use PhpParser\Node;

use PhpParser\Node\Expr\ArrayDimFetch;

use PhpParser\Node\Expr\Assign;

use PhpParser\Node\Expr\AssignRef;

use PhpParser\Node\Stmt\Foreach_;

use Psy\Exception\FatalErrorException;

/**

 * Validate empty brackets are only used for assignment.

 */

class EmptyArrayDimFetchPass extends CodeCleanerPass

{

    const EXCEPTION_MESSAGE = 'Cannot use [] for reading';

    private $theseOnesAreFine = [];

    /**

     * @return Node[]|null Array of nodes

     */

    public function beforeTraverse(array $nodes)

    {

        $this->theseOnesAreFine = [];

    }

    /**

     * @throws FatalErrorException if the user used empty array dim fetch outside of assignment

     *

     * @param Node $node

     *

     * @return int|Node|null Replacement node (or special return value)

     */

    public function enterNode(Node $node)

    {

        if ($node instanceof Assign && $node->var instanceof ArrayDimFetch) {

            $this->theseOnesAreFine[] = $node->var;

        } elseif ($node instanceof AssignRef && $node->expr instanceof ArrayDimFetch) {

            $this->theseOnesAreFine[] = $node->expr;

        } elseif ($node instanceof Foreach_ && $node->valueVar instanceof ArrayDimFetch) {

            $this->theseOnesAreFine[] = $node->valueVar;

        } elseif ($node instanceof ArrayDimFetch && $node->var instanceof ArrayDimFetch) {

            // $a[]['b'] = 'c'

            if (\in_array($node, $this->theseOnesAreFine)) {

                $this->theseOnesAreFine[] = $node->var;

            }

        }

        if ($node instanceof ArrayDimFetch && $node->dim === null) {

            if (!\in_array($node, $this->theseOnesAreFine)) {

                throw new FatalErrorException(self::EXCEPTION_MESSAGE, $node->getLine());

            }

        }

    }

}