<?php

/*
 * This file is part of PHP CS Fixer.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *     Dariusz Rumiński <dariusz.ruminski@gmail.com>
 *
 * This source file is subject to the MIT license that is bundled
 * with this source code in the file LICENSE.
 */

namespace PhpCsFixer\Fixer\Phpdoc;

use PhpCsFixer\AbstractFixer;
use PhpCsFixer\FixerDefinition\CodeSample;
use PhpCsFixer\FixerDefinition\FixerDefinition;
use PhpCsFixer\Preg;
use PhpCsFixer\Tokenizer\Tokens;

/**
 * @author SpacePossum
 */
final class NoEmptyPhpdocFixer extends AbstractFixer
{
    /**
     * {@inheritdoc}
     */
    public function getDefinition()
    {
        return new FixerDefinition(
            'There should not be empty PHPDoc blocks.',
            array(new CodeSample('<?php /**  */'))
        );
    }

    /**
     * {@inheritdoc}
     */
    public function getPriority()
    {
        // should be run before NoExtraConsecutiveBlankLinesFixer, NoTrailingWhitespaceFixer, NoWhitespaceInBlankLineFixer and
        // after PhpdocNoAccessFixer, PhpdocNoEmptyReturnFixer, PhpdocNoPackageFixer.
        return 5;
    }

    /**
     * {@inheritdoc}
     */
    public function isCandidate(Tokens $tokens)
    {
        return $tokens->isTokenKindFound(T_DOC_COMMENT);
    }

    /**
     * {@inheritdoc}
     */
    protected function applyFix(\SplFileInfo $file, Tokens $tokens)
    {
        foreach ($tokens as $index => $token) {
            if (!$token->isGivenKind(T_DOC_COMMENT)) {
                continue;
            }

            if (Preg::match('#^/\*\*[\s\*]*\*/$#', $token->getContent())) {
                $tokens->clearTokenAndMergeSurroundingWhitespace($index);
            }
        }
    }
}
