/**
* Generates PDF preview image and saves it.
* @param string $pdfFilePath full path to pdf file.
* @param string $destImagePath full path of image file that must be saved.
* @throws InvalidParamException if cannot write file.
*/
public static function savePreview($pdfFilePath, $destImagePath)
{
$decodedDestImagePath = FileSystemHelper::decodeFilename($destImagePath);
if ($decodedDestImagePath === false) {
$extension = null;
} else {
$extension = FileSystemHelper::extension($decodedDestImagePath);
$extension = FileSystemHelper::encodeFilename($extension);
}
$content = static::getPreview($pdfFilePath, $extension);
if (false === @file_put_contents($destImagePath, $content)) {
throw new InvalidParamException("Cannot save file: {$destImagePath}");
}
}
