public function download_invoice()
{
if (isset($_GET['action']) && $_GET['action'] == 'wc-gzdp-download') {
$invoice = false;
if (isset($_GET['preview']) && wp_verify_nonce($_REQUEST['_wpnonce'], 'wc-gzdp-download')) {
$invoice = new WC_GZDP_Invoice_Preview();
$invoice->generate_pdf(true);
exit;
} else {
if (isset($_GET['id']) && wp_verify_nonce($_REQUEST['_wpnonce'], 'wc-gzdp-download')) {
$id = absint($_GET['id']);
$invoice = wc_gzdp_get_invoice($id);
if (!current_user_can('manage_woocommerce') && !current_user_can('view_order', $invoice->order)) {
$invoice = false;
}
} else {
wp_die(__('Cheatin huh?', 'woocommerce-germanized-pro'));
}
}
if ($invoice) {
WC_GZDP_Download_Handler::download($invoice, isset($_GET['force']) && $_GET['force'] ? true : false);
}
wp_die(__('Missing permissions to download invoice', 'woocommerce-germanized-pro'));
}
}
