admin/model/localisation/tax_class.php

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<?php
class ModelLocalisationTaxClass extends Model {
	public function addTaxClass($data) {
		$this->db->query("INSERT INTO " . DB_PREFIX . "tax_class SET title = '" . $this->db->escape((string)$data['title']) . "', description = '" . $this->db->escape((string)$data['description']) . "', date_added = NOW()");

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

		if (isset($data['tax_rule'])) {
			foreach ($data['tax_rule'] as $tax_rule) {
				$this->db->query("INSERT INTO " . DB_PREFIX . "tax_rule SET tax_class_id = '" . (int)$tax_class_id . "', tax_rate_id = '" . (int)$tax_rule['tax_rate_id'] . "', based = '" . $this->db->escape($tax_rule['based']) . "', priority = '" . (int)$tax_rule['priority'] . "'");
			}
		}

		$this->cache->delete('tax_class');
		
		return $tax_class_id;
	}

	public function editTaxClass($tax_class_id, $data) {
		$this->db->query("UPDATE " . DB_PREFIX . "tax_class SET title = '" . $this->db->escape((string)$data['title']) . "', description = '" . $this->db->escape((string)$data['description']) . "', date_modified = NOW() WHERE tax_class_id = '" . (int)$tax_class_id . "'");

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

		if (isset($data['tax_rule'])) {
			foreach ($data['tax_rule'] as $tax_rule) {
				$this->db->query("INSERT INTO " . DB_PREFIX . "tax_rule SET tax_class_id = '" . (int)$tax_class_id . "', tax_rate_id = '" . (int)$tax_rule['tax_rate_id'] . "', based = '" . $this->db->escape($tax_rule['based']) . "', priority = '" . (int)$tax_rule['priority'] . "'");
			}
		}

		$this->cache->delete('tax_class');
	}

	public function deleteTaxClass($tax_class_id) {
		$this->db->query("DELETE FROM " . DB_PREFIX . "tax_class WHERE tax_class_id = '" . (int)$tax_class_id . "'");
		$this->db->query("DELETE FROM " . DB_PREFIX . "tax_rule WHERE tax_class_id = '" . (int)$tax_class_id . "'");

		$this->cache->delete('tax_class');
	}

	public function getTaxClass($tax_class_id) {
		$query = $this->db->query("SELECT * FROM " . DB_PREFIX . "tax_class WHERE tax_class_id = '" . (int)$tax_class_id . "'");

		return $query->row;
	}

	public function getTaxClasses($data = array()) {
		if ($data) {
			$sql = "SELECT * FROM " . DB_PREFIX . "tax_class";

			$sql .= " ORDER BY title";

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

			if (isset($data['start']) || isset($data['limit'])) {
				if ($data['start'] < 0) {
					$data['start'] = 0;