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<?php

declare(strict_types=1);

/*
 * 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\Whitespace;

use PhpCsFixer\AbstractFixer;
use PhpCsFixer\Fixer\WhitespacesAwareFixerInterface;
use PhpCsFixer\FixerDefinition\CodeSample;
use PhpCsFixer\FixerDefinition\FixerDefinition;
use PhpCsFixer\FixerDefinition\FixerDefinitionInterface;
use PhpCsFixer\Preg;
use PhpCsFixer\Tokenizer\Token;
use PhpCsFixer\Tokenizer\Tokens;

/**
 * Fixer for rules defined in PSR2 ¶2.2.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 * @author Dariusz Rumiński <dariusz.ruminski@gmail.com>
 */
final class LineEndingFixer extends AbstractFixer implements WhitespacesAwareFixerInterface
{
    /**
     * {@inheritdoc}
     */
    public function isCandidate(Tokens $tokens): bool
    {
        return true;
    }

    /**
     * {@inheritdoc}
     */
    public function getDefinition(): FixerDefinitionInterface
    {
        return new FixerDefinition(
            'All PHP files must use same line ending.',
            [
                new CodeSample(
                    "<?php \$b = \" \$a \r\n 123\"; \$a = <<<TEST\r\nAAAAA \r\n |\r\nTEST;\n"
                ),
            ]
        );
    }

    /**
     * {@inheritdoc}
     *
     * Must run before BracesFixer.
     */
    public function getPriority(): int
    {
        return 40;
    }

    /**
     * {@inheritdoc}
     */
    protected function applyFix(\SplFileInfo $file, Tokens $tokens): void
    {
        $ending = $this->whitespacesConfig->getLineEnding();

        for ($index = 0, $count = \count($tokens); $index < $count; ++$index) {
            $token = $tokens[$index];

            if ($token->isGivenKind(T_ENCAPSED_AND_WHITESPACE)) {
                if ($tokens[$tokens->getNextMeaningfulToken($index)]->isGivenKind(T_END_HEREDOC)) {
                    $tokens[$index] = new Token([
                        $token->getId(),
                        Preg::replace(
                            '#\R#',
                            $ending,
                            $token->getContent()
                        ),
                    ]);
                }

                continue;
            }

            if ($token->isGivenKind([T_CLOSE_TAG, T_COMMENT, T_DOC_COMMENT, T_OPEN_TAG, T_START_HEREDOC, T_WHITESPACE])) {
                $tokens[$index] = new Token([
                    $token->getId(),
                    Preg::replace(
                        '#\R#',
                        $ending,
                        $token->getContent()
                    ),
                ]);
            }
        }
    }
}