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<?php |
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/** |
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* This file is part of the League.csv library |
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* |
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* @license http://opensource.org/licenses/MIT |
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* @link https://github.com/thephpleague/csv/ |
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* @version 9.0.1 |
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* @package League.csv |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace League\Csv; |
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use InvalidArgumentException; |
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use php_user_filter; |
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/** |
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* A stream filter to conform the CSV field to RFC4180 |
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* |
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* @see https://tools.ietf.org/html/rfc4180#section-2 |
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* |
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* @package League.csv |
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* @since 9.0.0 |
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* @author Ignace Nyamagana Butera <[email protected]> |
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*/ |
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class RFC4180Field extends php_user_filter |
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{ |
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const FILTERNAME = 'convert.league.csv.rfc4180'; |
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/** |
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* the filter name used to instantiate the class with |
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* |
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* @var string |
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*/ |
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public $filtername; |
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/** |
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* Contents of the params parameter passed to stream_filter_append |
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* or stream_filter_prepend functions |
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* |
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* @var mixed |
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*/ |
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public $params; |
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/** |
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* The value being search for |
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* |
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* @var string[] |
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*/ |
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protected $search; |
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/** |
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* The replacement value that replace found $search values |
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* |
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* @var string[] |
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*/ |
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protected $replace; |
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/** |
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* Characters that triggers enclosure with PHP fputcsv |
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* |
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* @var string |
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*/ |
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protected static $force_enclosure = "\n\r\t "; |
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6 |
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/** |
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* Static method to add the stream filter to a {@link AbstractCsv} object |
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* |
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* @param AbstractCsv $csv |
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* @param string $whitespace_replace |
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* |
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* @return AbstractCsv |
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*/ |
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public static function addTo(AbstractCsv $csv, string $whitespace_replace = ''): AbstractCsv |
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{ |
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self::register(); |
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$params = [ |
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'enclosure' => $csv->getEnclosure(), |
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'escape' => $csv->getEscape(), |
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'mode' => $csv->getStreamFilterMode(), |
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]; |
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if ($csv instanceof Writer && '' != $whitespace_replace) { |
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self::addFormatterTo($csv, $whitespace_replace); |
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$params['whitespace_replace'] = $whitespace_replace; |
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} |
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return $csv->addStreamFilter(self::FILTERNAME, $params); |
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} |
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/** |
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* Add a formatter to the {@link Writer} object to format the record |
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* field to avoid enclosure around a field with an empty space |
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* |
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* @param Writer $csv |
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* @param string $whitespace_replace |
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* |
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* @return Writer |
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*/ |
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public static function addFormatterTo(Writer $csv, string $whitespace_replace): Writer |
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{ |
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if ('' == $whitespace_replace || strlen($whitespace_replace) != strcspn($whitespace_replace, self::$force_enclosure)) { |
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throw new InvalidArgumentException('The sequence contains a character that enforces enclosure or is a CSV control character or is the empty string.'); |
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} |
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$mapper = function ($value) use ($whitespace_replace) { |
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if (is_string($value)) { |
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return str_replace(' ', $whitespace_replace, $value); |
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} |
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return $value; |
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}; |
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$formatter = function (array $record) use ($mapper): array { |
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return array_map($mapper, $record); |
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}; |
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return $csv->addFormatter($formatter); |
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} |
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/** |
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* Static method to register the class as a stream filter |
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*/ |
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public static function register() |
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{ |
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if (!in_array(self::FILTERNAME, stream_get_filters())) { |
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stream_filter_register(self::FILTERNAME, __CLASS__); |
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} |
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} |
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/** |
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* Static method to return the stream filter filtername |
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* |
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* @return string |
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*/ |
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public static function getFiltername(): string |
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{ |
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return self::FILTERNAME; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function filter($in, $out, &$consumed, $closing) |
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{ |
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while ($bucket = stream_bucket_make_writeable($in)) { |
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$bucket->data = str_replace($this->search, $this->replace, $bucket->data); |
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$consumed += $bucket->datalen; |
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stream_bucket_append($out, $bucket); |
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} |
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return PSFS_PASS_ON; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function onCreate() |
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{ |
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if (!$this->isValidParams($this->params)) { |
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return false; |
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} |
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$this->search = [$this->params['escape'].$this->params['enclosure']]; |
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$this->replace = [$this->params['enclosure'].$this->params['enclosure']]; |
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if (STREAM_FILTER_WRITE != $this->params['mode']) { |
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return true; |
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} |
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$this->search = [$this->params['escape'].$this->params['enclosure']]; |
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$this->replace = [$this->params['escape'].$this->params['enclosure'].$this->params['enclosure']]; |
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if ($this->isValidSequence($this->params)) { |
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$this->search[] = $this->params['whitespace_replace']; |
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$this->replace[] = ' '; |
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} |
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return true; |
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} |
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/** |
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* Validate params property |
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* |
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* @param array $params |
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* |
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* @return bool |
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*/ |
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protected function isValidParams(array $params): bool |
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{ |
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static $mode_list = [STREAM_FILTER_READ => 1, STREAM_FILTER_WRITE => 1]; |
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return isset($params['enclosure'], $params['escape'], $params['mode'], $mode_list[$params['mode']]) |
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&& 1 == strlen($params['enclosure']) |
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&& 1 == strlen($params['escape']); |
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} |
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/** |
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* Is Valid White space replaced sequence |
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* |
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* @param array $params |
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* |
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* @return bool |
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*/ |
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protected function isValidSequence(array $params) |
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{ |
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return isset($params['whitespace_replace']) |
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&& strlen($params['whitespace_replace']) == strcspn($params['whitespace_replace'], self::$force_enclosure); |
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} |
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} |
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thephpleague /
csv
