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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\Config; |
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use League\Csv\StreamIterator; |
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use LogicException; |
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use SplFileObject; |
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/** |
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* An abstract class to enable basic CSV manipulation |
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* |
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* @package League.csv |
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* @since 9.0.0 |
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* @internal |
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*/ |
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trait StreamTrait |
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{ |
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/** |
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* The CSV document |
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* |
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* can be a StreamIterator object, a SplFileObject object or the string path to a file |
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* |
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* @var StreamIterator|SplFileObject |
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*/ |
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protected $document; |
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/** |
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* collection of stream filters |
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* |
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* @var array |
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*/ |
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protected $stream_filters = []; |
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/** |
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* The stream filter mode (read or write) |
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*/ |
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protected $stream_filter_mode; |
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/** |
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* Tells whether the stream filter capabilities can be used |
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* |
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* @return bool |
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*/ |
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public function isActiveStreamFilter(): bool |
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{ |
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return $this->document instanceof StreamIterator; |
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} |
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/** |
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* Tell whether the specify stream filter is attach to the current stream |
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* |
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* @return bool |
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*/ |
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public function hasStreamFilter(string $filter_name): bool |
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{ |
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return isset($this->stream_filters[$filter_name]); |
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} |
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/** |
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* Remove all registered stream filter |
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* |
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* @return $this |
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*/ |
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public function clearStreamFilter(): self |
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{ |
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foreach (array_keys($this->stream_filters) as $filter_name) { |
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$this->removeStreamFilter($filter_name); |
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} |
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$this->stream_filters = []; |
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return $this; |
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} |
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/** |
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* Remove all the stream filter with the same name |
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* |
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* @param string $filter_name the stream filter name |
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* |
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* @return $this |
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*/ |
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public function removeStreamFilter(string $filter_name): self |
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{ |
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if (!isset($this->stream_filters[$filter_name])) { |
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return $this; |
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} |
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foreach ($this->stream_filters[$filter_name] as $filter) { |
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$this->document->removeFilter($filter); |
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} |
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unset($this->stream_filters[$filter_name]); |
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return $this; |
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} |
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/** |
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* append a stream filter |
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* |
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* @param string $filter_name a string or an object that implements the '__toString' method |
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* |
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* @return $this |
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*/ |
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public function appendStreamFilter(string $filter_name): self |
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{ |
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$this->assertStreamable(); |
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$this->stream_filters[$filter_name][] = $this->document->appendFilter( |
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$filter_name, |
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$this->stream_filter_mode |
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); |
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return $this; |
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} |
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/** |
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* Check if the trait methods can be used |
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* |
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* @throws LogicException If the API can not be use |
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*/ |
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protected function assertStreamable() |
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{ |
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if (!$this->isActiveStreamFilter()) { |
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throw new LogicException('The stream filter API can not be used'); |
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} |
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} |
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/** |
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* prepend a stream filter |
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* |
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* @param string $filter_name the stream filter name |
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* |
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* @return $this |
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*/ |
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public function prependStreamFilter(string $filter_name): self |
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{ |
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$this->assertStreamable(); |
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$this->stream_filters[$filter_name][] = $this->document->prependFilter( |
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$filter_name, |
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$this->stream_filter_mode |
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); |
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return $this; |
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} |
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} |
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thephpleague /
csv
