catalog/controller/extension/total/shipping.php

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<?php
class ControllerExtensionTotalShipping extends Controller {
	public function index() {
		if ($this->config->get('total_shipping_status') && $this->config->get('total_shipping_estimator') && $this->cart->hasShipping()) {
			$this->load->language('extension/total/shipping');

			if (isset($this->session->data['shipping_address']['country_id'])) {
				$data['country_id'] = $this->session->data['shipping_address']['country_id'];
			} else {
				$data['country_id'] = $this->config->get('config_country_id');
			}

			$this->load->model('localisation/country');

			$data['countries'] = $this->model_localisation_country->getCountries();

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

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

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

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

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

		$json = array();

		if (!$this->cart->hasProducts()) {
			$json['error']['warning'] = $this->language->get('error_product');
		}

		if (!$this->cart->hasShipping()) {
			$json['error']['warning'] = sprintf($this->language->get('error_no_shipping'), $this->url->link('information/contact'));
		}

		if ($this->request->post['country_id'] == '') {
			$json['error']['country'] = $this->language->get('error_country');
		}

		if (!isset($this->request->post['zone_id']) || $this->request->post['zone_id'] == '') {
			$json['error']['zone'] = $this->language->get('error_zone');
		}

		$this->load->model('localisation/country');