/**
* @param ItemReaderInterface $reader
* @param ExportProcessor $processor
* @param ItemWriterInterface $writer
* @param array $contextParameters
* @param int $batchSize
* @param string $format
*
* @return StreamedResponse
*/
public function handle(ItemReaderInterface $reader, ExportProcessor $processor, ItemWriterInterface $writer, array $contextParameters, $batchSize, $format)
{
if (!isset($contextParameters['gridName'])) {
throw new InvalidArgumentException('Parameter "gridName" must be provided.');
}
$context = new Context($contextParameters);
$executor = new StepExecutor();
$executor->setBatchSize($batchSize);
$executor->setReader($reader)->setProcessor($processor)->setWriter($writer);
foreach ([$executor->getReader(), $executor->getProcessor(), $executor->getWriter()] as $element) {
if ($element instanceof ContextAwareInterface) {
$element->setImportExportContext($context);
}
}
$contentType = $this->guesser->guessByFileExtension($format);
if (!$contentType) {
$contentType = 'application/octet-stream';
}
// prepare response
$response = new StreamedResponse($this->exportCallback($context, $executor));
$response->headers->set('Content-Type', $contentType);
$response->headers->set('Content-Transfer-Encoding', 'binary');
$outputFileName = sprintf('datagrid_%s_%s.%s', str_replace('-', '_', $contextParameters['gridName']), date('Y_m_d_H_i_s'), $format);
$response->headers->set('Content-Disposition', $response->headers->makeDisposition(ResponseHeaderBag::DISPOSITION_ATTACHMENT, $outputFileName));
return $response;
}
/**
* Tries to guess MIME type of the given file
*
* @param string $fileName
* @return string|null
*/
protected function getFileContentType($fileName)
{
$extension = pathinfo($fileName, PATHINFO_EXTENSION);
return $this->mimeTypeGuesser->guessByFileExtension($extension);
}
