/**
* Get copyright info from exercise
*
* @return array
*/
public function getCopyRightInfo()
{
$result = array();
if ($this->soundFile !== null && strlen(trim($this->soundFile->getDescription()))) {
$result[] = array('text' => $this->soundFile->getDescription(), 'type' => 'audio', 'exercise' => $this->number + 1);
}
if ($this->pdfFile !== null && strlen(trim($this->pdfFile->getDescription()))) {
$result[] = array('text' => $this->pdfFile->getDescription(), 'type' => 'pdf', 'exercise' => $this->number + 1);
}
if ($this->image !== null && strlen(trim($this->image->getCopyright()))) {
$result[] = array('text' => $this->image->getCopyright(), 'type' => 'image', 'exercise' => $this->number + 1);
}
if ($this->textContent !== null && strlen(trim($this->textContent->getCopyright()))) {
$result[] = array('text' => $this->textContent->getCopyright(), 'type' => 'text', 'exercise' => $this->number + 1);
}
return $result;
}
