CsvUtility.php

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<?php
 
declare(strict_types=1);
 
/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */
 
namespace ‪TYPO3\CMS\Core\Utility;
 
use ‪TYPO3\CMS\Core\IO\CsvStreamFilter;
 
class ‪CsvUtility
{
    public const ‪TYPE_PASSTHROUGH = 0;
 
    public const ‪TYPE_REMOVE_CONTROLS = 1;
 
    public const ‪TYPE_PREFIX_CONTROLS = 2;
 
    public static function ‪csvToArray(string $input, string $fieldDelimiter = ',', string $fieldEnclosure = '"', int $maximumColumns = 0): array
    {
        $multiArray = [];
        $maximumCellCount = 0;
 
        if (($handle = fopen('php://memory', 'r+')) !== false) {
            fwrite($handle, $input);
            rewind($handle);
            while (($cells = fgetcsv($handle, 0, $fieldDelimiter, $fieldEnclosure)) !== false) {
                $maximumCellCount = max(count($cells), $maximumCellCount);
                $multiArray[] = preg_replace('|<br */?>|i', LF, $cells);
            }
            fclose($handle);
        }
 
        if ($maximumColumns > $maximumCellCount) {
            $maximumCellCount = $maximumColumns;
        }
 
        foreach ($multiArray as &$row) {
            for ($key = 0; $key < $maximumCellCount; $key++) {
                if (
                    $maximumColumns > 0
                    && $maximumColumns < $maximumCellCount
                    && $key >= $maximumColumns
                ) {
                    if (isset($row[$key])) {
                        unset($row[$key]);
                    }
                } elseif (!isset($row[$key])) {
                    $row[$key] = '';
                }
            }
        }
 
        return $multiArray;
    }
 
    public static function ‪csvValues(array $row, string $delim = ',', string $quote = '"', int $type = self::TYPE_REMOVE_CONTROLS): string
    {
        $resource = fopen('php://temp', 'w');
        if (!is_resource($resource)) {
            throw new \RuntimeException('Cannot open temporary data stream for writing', 1625556521);
        }
        $modifier = ‪CsvStreamFilter::applyStreamFilter($resource, false);
        array_map(self::assertCellValueType(...), $row);
        if ($type === self::TYPE_REMOVE_CONTROLS) {
            $row = array_map(self::removeControlLiterals(...), $row);
        } elseif ($type === self::TYPE_PREFIX_CONTROLS) {
            $row = array_map(self::prefixControlLiterals(...), $row);
        }
        fputcsv($resource, $modifier($row), $delim, $quote);
        fseek($resource, 0);
        return stream_get_contents($resource);
    }
 
    protected static function ‪prefixControlLiterals(bool|int|float|string|null $cellValue): bool|int|float|string|null
    {
        if (!self::shallFilterValue($cellValue)) {
            return $cellValue;
        }
        $cellValue = (string)$cellValue;
        return preg_replace('#^([\t\v=+*%/@-])#', '\'${1}', $cellValue);
    }
 
    protected static function removeControlLiterals(bool|int|float|string|null $cellValue): bool|int|float|string|null
    {
        if (!self::shallFilterValue($cellValue)) {
            return $cellValue;
        }
        $cellValue = (string)$cellValue;
        return preg_replace('#^([\t\v=+*%/@-]+)+#', '', $cellValue);
    }
 
    protected static function assertCellValueType(mixed $cellValue): void
    {
        // int, float, string, bool, null
        if ($cellValue === null || is_scalar($cellValue)) {
            return;
        }
        throw new \RuntimeException(
            sprintf('Unexpected type %s for cell value', gettype($cellValue)),
            1625562833
        );
    }
 
    protected static function shallFilterValue(bool|int|float|string|null $cellValue): bool
    {
        return $cellValue !== null
            && !is_bool($cellValue)
            && !is_numeric($cellValue)
            && !MathUtility::canBeInterpretedAsInteger($cellValue)
            && !MathUtility::canBeInterpretedAsFloat($cellValue);
    }
}