catalog/controller/extension/total/voucher.php

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<?php
class ControllerExtensionTotalVoucher extends Controller {
	public function index() {
		if ($this->config->get('total_voucher_status')) {
			$this->load->language('extension/total/voucher');

			if (isset($this->session->data['voucher'])) {
				$data['voucher'] = $this->session->data['voucher'];
			} else {
				$data['voucher'] = '';
			}

			return $this->load->view('extension/total/voucher', $data);
		}
	}

	public function voucher() {
		$this->load->language('extension/total/voucher');

		$json = array();

		$this->load->model('extension/total/voucher');

		if (isset($this->request->post['voucher'])) {
			$voucher = $this->request->post['voucher'];
		} else {
			$voucher = '';
		}

		$voucher_info = $this->model_extension_total_voucher->getVoucher($voucher);

		if (empty($this->request->post['voucher'])) {
			$json['error'] = $this->language->get('error_empty');
		} elseif ($voucher_info) {
			$this->session->data['voucher'] = $this->request->post['voucher'];

			$this->session->data['success'] = $this->language->get('text_success');

			$json['redirect'] = $this->url->link('checkout/cart');
		} else {
			$json['error'] = $this->language->get('error_voucher');
		}

		$this->response->addHeader('Content-Type: application/json');
		$this->response->setOutput(json_encode($json));
	}

	public function send($route, $args, $output) {
		$this->load->model('checkout/order');

		$order_info = $this->model_checkout_order->getOrder($args[0]);

		// If order status in the complete range create any vouchers that where in the order need to be made available.
		if (in_array($order_info['order_status_id'], $this->config->get('config_complete_status'))) {
			$voucher_query = $this->db->query("SELECT *, vtd.name AS theme FROM `" . DB_PREFIX . "voucher` v LEFT JOIN " . DB_PREFIX . "voucher_theme vt ON (v.voucher_theme_id = vt.voucher_theme_id) LEFT JOIN " . DB_PREFIX . "voucher_theme_description vtd ON (vt.voucher_theme_id = vtd.voucher_theme_id) WHERE v.order_id = '" . (int)$order_info['order_id'] . "' AND vtd.language_id = '" . (int)$order_info['language_id'] . "'");

			if ($voucher_query->num_rows) {
				// Send out any gift voucher mails
				$language = new Language($order_info['language_code']);
				$language->load($order_info['language_code']);