ColonAfterSwitchCaseRector.php

<?php

declare(strict_types=1);

namespace Rector\Php85\Rector\Switch_;

use PhpParser\Node;
use PhpParser\Node\Expr;
use PhpParser\Node\Stmt\Switch_;
use Rector\Rector\AbstractRector;
use Rector\ValueObject\PhpVersionFeature;
use Rector\VersionBonding\Contract\MinPhpVersionInterface;
use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;

/**
 * @see \Rector\Tests\Php85\Rector\Switch_\ColonAfterSwitchCaseRector\ColonAfterSwitchCaseRectorTest
 */
final class ColonAfterSwitchCaseRector extends AbstractRector implements MinPhpVersionInterface
{
    public function getRuleDefinition(): RuleDefinition
    {
        return new RuleDefinition('Change deprecated semicolon to colon after switch case', [
            new CodeSample(
                <<<'CODE_SAMPLE'
switch ($value) {
    case 'baz';
        echo 'baz';
}
CODE_SAMPLE
                ,
                <<<'CODE_SAMPLE'
switch ($value) {
    case 'baz':
        echo 'baz';
}
CODE_SAMPLE
            ),
        ]);
    }

    public function getNodeTypes(): array
    {
        return [Switch_::class];
    }

    /**
     * @param Switch_ $node
     */
    public function refactor(Node $node): ?Node
    {
        $hasChanged = false;
        $oldTokens = $this->file->getOldTokens();

        foreach ($node->cases as $key => $case) {
            $cond = $case->cond;

            if (! $cond instanceof Expr) {
                continue;
            }

            $endTokenPos = $cond->getEndTokenPos();

            if ($endTokenPos < 0) {
                continue;
            }

            $startCaseStmtsPos = count($case->stmts) === 0
                ? (
                    isset($node->cases[$key + 1])
                    ? $node->cases[$key + 1]->getStartTokenPos()
                    : $node->getEndTokenPos()
                )
                : $case->stmts[0]->getStartTokenPos();

            if ($startCaseStmtsPos < 0) {
                continue;
            }

            $nextTokenPos = $endTokenPos;
            while (++$nextTokenPos < $startCaseStmtsPos) {
                if (! isset($oldTokens[$nextTokenPos])) {
                    continue 2;
                }

                $nextToken = $oldTokens[$nextTokenPos];
                if (trim($nextToken->text) === '') {
                    continue;
                }

                if ($nextToken->text === ':') {
                    continue 2;
                }

                if ($nextToken->text === ';') {
                    $hasChanged = true;
                    $nextToken->text = ':';
                    continue 2;
                }
            }
        }

        if (! $hasChanged) {
            return null;
        }

        return $node;
    }

    public function provideMinPhpVersion(): int
    {
        return PhpVersionFeature::COLON_AFTER_SWITCH_CASE;
    }
}