admin/model/localisation/tax_rate.php

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<?php
class ModelLocalisationTaxRate extends Model {
	public function addTaxRate($data) {
		$this->db->query("INSERT INTO " . DB_PREFIX . "tax_rate SET name = '" . $this->db->escape((string)$data['name']) . "', rate = '" . (float)$data['rate'] . "', `type` = '" . $this->db->escape((string)$data['type']) . "', geo_zone_id = '" . (int)$data['geo_zone_id'] . "', date_added = NOW(), date_modified = NOW()");

		$tax_rate_id = $this->db->getLastId();

		if (isset($data['tax_rate_customer_group'])) {
			foreach ($data['tax_rate_customer_group'] as $customer_group_id) {
				$this->db->query("INSERT INTO " . DB_PREFIX . "tax_rate_to_customer_group SET tax_rate_id = '" . (int)$tax_rate_id . "', customer_group_id = '" . (int)$customer_group_id . "'");
			}
		}
		
		return $tax_rate_id;
	}

	public function editTaxRate($tax_rate_id, $data) {
		$this->db->query("UPDATE " . DB_PREFIX . "tax_rate SET name = '" . $this->db->escape((string)$data['name']) . "', rate = '" . (float)$data['rate'] . "', `type` = '" . $this->db->escape((string)$data['type']) . "', geo_zone_id = '" . (int)$data['geo_zone_id'] . "', date_modified = NOW() WHERE tax_rate_id = '" . (int)$tax_rate_id . "'");

		$this->db->query("DELETE FROM " . DB_PREFIX . "tax_rate_to_customer_group WHERE tax_rate_id = '" . (int)$tax_rate_id . "'");

		if (isset($data['tax_rate_customer_group'])) {
			foreach ($data['tax_rate_customer_group'] as $customer_group_id) {
				$this->db->query("INSERT INTO " . DB_PREFIX . "tax_rate_to_customer_group SET tax_rate_id = '" . (int)$tax_rate_id . "', customer_group_id = '" . (int)$customer_group_id . "'");
			}
		}
	}

	public function deleteTaxRate($tax_rate_id) {
		$this->db->query("DELETE FROM " . DB_PREFIX . "tax_rate WHERE tax_rate_id = '" . (int)$tax_rate_id . "'");
		$this->db->query("DELETE FROM " . DB_PREFIX . "tax_rate_to_customer_group WHERE tax_rate_id = '" . (int)$tax_rate_id . "'");
	}

	public function getTaxRate($tax_rate_id) {
		$query = $this->db->query("SELECT tr.tax_rate_id, tr.name AS name, tr.rate, tr.type, tr.geo_zone_id, gz.name AS geo_zone, tr.date_added, tr.date_modified FROM " . DB_PREFIX . "tax_rate tr LEFT JOIN " . DB_PREFIX . "geo_zone gz ON (tr.geo_zone_id = gz.geo_zone_id) WHERE tr.tax_rate_id = '" . (int)$tax_rate_id . "'");

		return $query->row;
	}

	public function getTaxRates($data = array()) {
		$sql = "SELECT tr.tax_rate_id, tr.name AS name, tr.rate, tr.type, gz.name AS geo_zone, tr.date_added, tr.date_modified FROM " . DB_PREFIX . "tax_rate tr LEFT JOIN " . DB_PREFIX . "geo_zone gz ON (tr.geo_zone_id = gz.geo_zone_id)";

		$sort_data = array(
			'tr.name',
			'tr.rate',
			'tr.type',
			'gz.name',
			'tr.date_added',
			'tr.date_modified'
		);

		if (isset($data['sort']) && in_array($data['sort'], $sort_data)) {
			$sql .= " ORDER BY " . $data['sort'];
		} else {
			$sql .= " ORDER BY tr.name";
		}

		if (isset($data['order']) && ($data['order'] == 'DESC')) {
			$sql .= " DESC";
		} else {