/**
* Download pdf invoice.
*
* @param int $id
* @return Response
*/
public function download($id)
{
$invoice = Invoice::find($id);
$client = $invoice->address($invoice->client);
$biller = $invoice->address($invoice->biller);
$tax_rate = $this->tax_rate->pluck('name');
$items = $invoice->item;
$pdf = PDF::loadView('invoices.pdf', compact('invoice', 'client', 'biller', 'items', 'tax_rate'));
return $pdf->download('invoice.pdf');
}
