/**
* The actual processing TASK
*
* Should return an array with database properties for sys_file_metadata to write
*
* @param File $file
* @param array $previousExtractedData optional, contains the array of already extracted data
* @return array
*/
public function extractMetaData(File $file, array $previousExtractedData = [])
{
$metadata = [];
try {
if (!class_exists('ColorThief\\ColorThief')) {
throw new \RuntimeException('Class ColorThief\\ColorThief does not exist', 1470749087524);
}
$path = $file->getForLocalProcessing();
$averageColor = ColorThief::getColor($path);
if (!is_array($averageColor)) {
throw new \RuntimeException('$averageColor is not an array', 1470749109020);
}
if (count($averageColor) !== 3) {
throw new \RuntimeException('$averageColor is an array, but has less than 3 items', 1470749136303);
}
$r = dechex((int) $averageColor[0]);
$g = dechex((int) $averageColor[1]);
$b = dechex((int) $averageColor[2]);
$metadata['average_color'] = '#' . $r . $g . $b;
$this->logger->debug(sprintf('Extracted average color "%s"', $metadata['average_color']), ['file' => $file->getUid()]);
} catch (\Exception $e) {
$this->logger->error($e->getCode() . ': ' . $e->getMessage(), ['file' => $file->getUid()]);
}
return $metadata;
}
/**
* Convert PNG image using pngquant command.
*
* @param AbstractFile $file
*/
public function convertPngImage(AbstractFile $file)
{
try {
if (self::EXTENSION_PNG !== $file->getExtension()) {
return;
}
// Ignore processed file which uses original file
if ($file instanceof ProcessedFile && $file->usesOriginalFile()) {
$this->logger->debug('Do not convert processed file identical with its original file', array('file' => $inputFilePath));
return;
}
// Set input/output files for pngquant command
// Input file is the the specified file we want to quantize
// Output file is a temporary file in typo3temp directory
$inputFilePath = PATH_site . $file->getPublicUrl();
$outputFilePath = GeneralUtility::tempnam('sg_pngquant_', '.' . self::EXTENSION_PNG);
// Build command line
$cmd = $this->buildCommand($inputFilePath, $outputFilePath);
$result = CommandUtility::exec($cmd, $output, $returnValue);
if (0 === $returnValue) {
// Replace content
if ($file instanceof ProcessedFile) {
// For processed file, only convert real processed file (i.e. different than their original file)
// Temporary file is automatically removed when updating a processed file
$this->logger->debug('Update processed file', array('cmd' => $cmd));
$file->updateWithLocalFile($outputFilePath);
} elseif (!$this->confArray['keepOriginal']) {
// Convert original files according to extension configuration
// After conversion the temporary file is removed
$this->logger->debug('Update original file', array('cmd' => $cmd));
$contents = @file_get_contents($outputFilePath);
$file->setContents($contents);
}
} else {
$this->logger->error('Convert image', array('cmd' => $cmd, 'result' => $result, 'output' => $output, 'returnValue' => $returnValue));
}
} catch (\RuntimeException $e) {
$this->logger->error($e->getMessage());
}
// Remove temporary file, if exists
if (file_exists($outputFilePath)) {
$this->removeTemporaryFile($outputFilePath);
}
}
