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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 9.0.0 |
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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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use Throwable; |
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/** |
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* A stream filter to conform the written CSV field to RFC4180 |
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* This stream filter should be attach to a League\Csv\Writer object |
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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 RFC4180FieldFilter extends php_user_filter |
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{ |
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use ValidatorTrait; |
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const STREAM_FILTERNAME = 'rfc4180.league.csv'; |
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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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* Static method to add the stream filter to a Writer object |
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* |
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* @param AbstractCsv $csv |
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*/ |
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public static function addTo(AbstractCsv $csv) |
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{ |
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if (!in_array(self::STREAM_FILTERNAME, stream_get_filters())) { |
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stream_filter_register(self::STREAM_FILTERNAME, __CLASS__); |
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} |
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$csv->addStreamFilter(self::STREAM_FILTERNAME, [ |
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'enclosure' => $csv->getEnclosure(), |
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'escape' => $csv->getEscape(), |
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'mode' => $csv->getStreamFilterMode(), |
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]); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function onCreate() |
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{ |
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if (!isset($this->params['enclosure'], $this->params['escape'], $this->params['mode'])) { |
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return false; |
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} |
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try { |
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$enclosure = $this->filterControl($this->params['enclosure'], 'enclosure', __METHOD__); |
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$escape = $this->filterControl($this->params['escape'], 'escape', __METHOD__); |
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$mode = $this->filterMode($this->params['mode']); |
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$this->search = $escape.$enclosure; |
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$this->replace = $escape.$enclosure.$enclosure; |
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if (STREAM_FILTER_READ === $mode) { |
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$this->replace = $enclosure.$enclosure; |
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} |
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return true; |
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} catch (Throwable $e) { |
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return false; |
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} |
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} |
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/** |
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* Filter the given mode |
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* |
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* @param int $mode stream filter mode |
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* |
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* @throws InvalidArgumentException if the mode value is unknown |
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* |
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* @return int |
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*/ |
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protected function filterMode(int $mode) |
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{ |
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if (in_array($mode, [STREAM_FILTER_READ, STREAM_FILTER_WRITE])) { |
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return $mode; |
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} |
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throw new InvalidArgumentException(sprintf('The given filter mode `%s` is unknown or unsupported', $mode)); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function filter($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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thephpleague /
csv
