/**
* @brief check pdf for metadata
*
* @param string $path path to pdf
* @param arrayref $meta reference to array of metadata
*/
public static function pdf($path, &$meta)
{
if (\OC_Util::runningOnWindows()) {
/* not supported when running on Windows due to use of exec() */
return;
}
/* first, try to get metadata through ISBN */
$command = ['pdftotext -l 10 "', '" -'];
$output = array();
exec($command[0] . $path . $command[1], $output);
if (!($output && ($isbn = Isbn::scan($output)) && Isbn::get($isbn, $meta))) {
/* No ISBN, try PDF metadata */
$output = array();
$command = ["pdfinfo '", "'|grep -we '^\\(Title\\|Author\\|Subject\\|Keywords\\|CreationDate\\|ModDate\\)'"];
exec($command[0] . $path . $command[1], $output);
foreach ($output as $data) {
list($key, $value) = explode(':', $data, 2);
$value = trim($value);
}
if (isset($value) && !($value == '')) {
switch ($key) {
case 'Title':
$meta['title'] = $value;
break;
case 'Author':
$meta['author'] = $value;
break;
case 'Subject':
case 'Keywords':
$meta['subjects'] .= $value;
break;
case 'CreationDate':
case 'ModDate':
$meta['date'] = strtotime($value);
break;
}
}
}
}
