Coupons::index PHP Method

    public function index()
    {
        $url = '?';
        $filter = array();
        if ($this->input->get('page')) {
            $filter['page'] = (int) $this->input->get('page');
        } else {
            $filter['page'] = '';
        }
        if ($this->config->item('page_limit')) {
            $filter['limit'] = $this->config->item('page_limit');
        }
        if ($this->input->get('filter_search')) {
            $filter['filter_search'] = $data['filter_search'] = $this->input->get('filter_search');
            $url .= 'filter_search=' . $filter['filter_search'] . '&';
        } else {
            $data['filter_search'] = '';
        }
        if ($this->input->get('filter_type')) {
            $filter['filter_type'] = $data['filter_type'] = $this->input->get('filter_type');
            $url .= 'filter_type=' . $filter['filter_type'] . '&';
        } else {
            $filter['filter_type'] = $data['filter_type'] = '';
        }
        if (is_numeric($this->input->get('filter_status'))) {
            $filter['filter_status'] = $data['filter_status'] = $this->input->get('filter_status');
            $url .= 'filter_status=' . $filter['filter_status'] . '&';
        } else {
            $filter['filter_status'] = $data['filter_status'] = '';
        }
        if ($this->input->get('sort_by')) {
            $filter['sort_by'] = $data['sort_by'] = $this->input->get('sort_by');
        } else {
            $filter['sort_by'] = $data['sort_by'] = 'coupon_id';
        }
        if ($this->input->get('order_by')) {
            $filter['order_by'] = $data['order_by'] = $this->input->get('order_by');
            $data['order_by_active'] = $this->input->get('order_by') . ' active';
        } else {
            $filter['order_by'] = $data['order_by'] = 'DESC';
            $data['order_by_active'] = 'DESC';
        }
        $this->template->setTitle($this->lang->line('text_title'));
        $this->template->setHeading($this->lang->line('text_heading'));
        $this->template->setButton($this->lang->line('button_new'), array('class' => 'btn btn-primary', 'href' => page_url() . '/edit'));
        $this->template->setButton($this->lang->line('button_delete'), array('class' => 'btn btn-danger', 'onclick' => 'confirmDelete();'));
        if ($this->input->post('delete') and $this->_deleteCoupon() === TRUE) {
            redirect('coupons');
        }
        $order_by = (isset($filter['order_by']) and $filter['order_by'] == 'ASC') ? 'DESC' : 'ASC';
        $data['sort_name'] = site_url('coupons' . $url . 'sort_by=name&order_by=' . $order_by);
        $data['sort_code'] = site_url('coupons' . $url . 'sort_by=code&order_by=' . $order_by);
        $data['sort_type'] = site_url('coupons' . $url . 'sort_by=type&order_by=' . $order_by);
        $data['sort_discount'] = site_url('coupons' . $url . 'sort_by=discount&order_by=' . $order_by);
        $data['sort_validity'] = site_url('coupons' . $url . 'sort_by=validity&order_by=' . $order_by);
        $data['coupons'] = array();
        $results = $this->Coupons_model->getList($filter);
        foreach ($results as $result) {
            $data['coupons'][] = array('coupon_id' => $result['coupon_id'], 'name' => $result['name'], 'code' => $result['code'], 'type' => $result['type'] === 'P' ? $this->lang->line('text_percentage') : $this->lang->line('text_fixed_amount'), 'discount' => $result['type'] === 'P' ? round($result['discount']) . '%' : $result['discount'], 'min_total' => $result['min_total'], 'validity' => ucwords($result['validity']), 'description' => $result['description'], 'status' => $result['status'] === '1' ? $this->lang->line('text_enabled') : $this->lang->line('text_disabled'), 'edit' => site_url('coupons/edit?id=' . $result['coupon_id']));
        }
        if ($this->input->get('sort_by') and $this->input->get('order_by')) {
            $url .= 'sort_by=' . $filter['sort_by'] . '&';
            $url .= 'order_by=' . $filter['order_by'] . '&';
        }
        $config['base_url'] = site_url('coupons' . $url);
        $config['total_rows'] = $this->Coupons_model->getCount($filter);
        $config['per_page'] = $filter['limit'];
        $this->pagination->initialize($config);
        $data['pagination'] = array('info' => $this->pagination->create_infos(), 'links' => $this->pagination->create_links());
        $this->template->render('coupons', $data);
    }