CommentPoster::prepareCommentsOnTaskUpdate

private function prepareCommentsOnTaskUpdate(array $oldFields, array $newFields, array $changes): array
{
	if (empty($changes))
	{
		return [];
	}

	return array_merge(
		$this->prepareChangeComments($oldFields, $newFields, $changes),
		$this->prepareStatusComments($oldFields, $newFields, $changes)
	);
}