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<?php |
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/* |
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* This file is part of the Blast Project package. |
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* |
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* Copyright (C) 2015-2017 Libre Informatique |
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* |
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* This file is licenced under the GNU LGPL v3. |
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* For the full copyright and license information, please view the LICENSE.md |
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* file that was distributed with this source code. |
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*/ |
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namespace Blast\CoreBundle\Exporter; |
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use Exporter\Source\SourceIteratorInterface; |
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use Exporter\Writer\TypedWriterInterface; |
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use Symfony\Component\HttpFoundation\StreamedResponse; |
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class Exporter |
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{ |
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/** |
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* @var TypedWriterInterface[] |
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*/ |
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private $writers; |
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/** |
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* @param TypedWriterInterface[] $writers an array of allowed typed writers, indexed by format name |
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*/ |
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public function __construct(array $writers = array()) |
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{ |
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$this->writers = array(); |
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foreach ($writers as $writer) { |
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$this->addWriter($writer); |
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} |
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} |
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/** |
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* @throws \RuntimeException |
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* |
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* @param string $format |
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* @param string $filename |
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* @param SourceIteratorInterface $source |
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* |
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* @return StreamedResponse |
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*/ |
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public function getResponse($format, $filename, SourceIteratorInterface $source) |
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{ |
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if (!array_key_exists($format, $this->writers)) { |
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throw new \RuntimeException(sprintf( |
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'Invalid "%s" format, supported formats are : "%s"', |
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$format, |
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implode(', ', array_keys($this->writers)) |
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)); |
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} |
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$writer = $this->writers[$format]; |
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$callback = function () use ($source, $writer) { |
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$handler = \Blast\CoreBundle\Exporter\Handler::create($source, $writer); |
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$handler->export(); |
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}; |
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$headers = array( |
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'Content-Disposition' => sprintf('attachment; filename="%s"', $filename), |
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); |
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$headers['Content-Type'] = $writer->getDefaultMimeType(); |
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return new StreamedResponse($callback, 200, $headers); |
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} |
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/** |
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* Returns a simple array of export formats. |
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* |
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* @return string[] writer formats as returned by the TypedWriterInterface::getFormat() method |
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*/ |
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public function getAvailableFormats() |
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{ |
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return array_keys($this->writers); |
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} |
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/** |
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* The main benefit of this method is the type hinting. |
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* |
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* @param TypedWriterInterface $writer a possible writer for exporting data |
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*/ |
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public function addWriter(TypedWriterInterface $writer) |
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{ |
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$this->writers[$writer->getFormat()] = $writer; |
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} |
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} |
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blast-project /
CoreBundle
