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<?php |
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namespace TreeHouse\Feeder\Resource\Transformer; |
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use TreeHouse\Feeder\Resource\FileResource; |
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use TreeHouse\Feeder\Resource\ResourceCollection; |
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use TreeHouse\Feeder\Resource\ResourceInterface; |
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use TreeHouse\Feeder\Transport\FileTransport; |
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/** |
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* Converts character encoding. |
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*/ |
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class ConvertEncodingTransformer implements ResourceTransformerInterface |
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{ |
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/** |
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* @var string |
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*/ |
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protected $fromEncoding; |
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/** |
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* @var string |
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*/ |
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protected $toEncoding; |
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/** |
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* @param string $fromEncoding The encoding in which the resource is initially |
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* @param string $toEncoding The encoding to convert to. Uses internal encoding when left empty |
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*/ |
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public function __construct($fromEncoding, $toEncoding = null) |
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{ |
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$this->fromEncoding = $fromEncoding; |
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$this->toEncoding = $toEncoding ?: mb_internal_encoding(); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function transform(ResourceInterface $resource, ResourceCollection $collection) |
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{ |
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$file = $resource->getFile()->getPathname(); |
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// first, rename the original file |
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$oldFile = $this->rename($file); |
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$old = fopen($oldFile, 'r'); |
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$new = fopen($file, 'w'); |
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while (!feof($old)) { |
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fwrite($new, mb_convert_encoding(fgets($old), $this->toEncoding, $this->fromEncoding)); |
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} |
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fclose($old); |
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fclose($new); |
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unlink($oldFile); |
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$transport = FileTransport::create($file); |
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if ($resource->getTransport()) { |
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$transport->setDestinationDir($resource->getTransport()->getDestinationDir()); |
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} |
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return new FileResource($transport); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function needsTransforming(ResourceInterface $resource) |
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{ |
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$file = $resource->getFile(); |
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while (!$file->eof()) { |
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$line = $file->fgets(); |
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if (!mb_check_encoding($line, $this->toEncoding)) { |
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return true; |
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} |
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} |
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return false; |
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} |
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/** |
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* @param string $file |
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* |
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* @throws \RuntimeException |
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* |
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* @return string |
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*/ |
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protected function rename($file) |
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{ |
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$tmpFile = $file . '.tmp'; |
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if (rename($file, $tmpFile)) { |
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return $tmpFile; |
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} |
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throw new \RuntimeException(sprintf('Could not rename %s to %s', $file, $tmpFile)); |
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} |
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} |
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treehouselabs /
feeder
