admin/model/localisation/weight_class.php

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<?php
class ModelLocalisationWeightClass extends Model {
	public function addWeightClass($data) {
		$this->db->query("INSERT INTO " . DB_PREFIX . "weight_class SET value = '" . (float)$data['value'] . "'");

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

		foreach ($data['weight_class_description'] as $language_id => $value) {
			$this->db->query("INSERT INTO " . DB_PREFIX . "weight_class_description SET weight_class_id = '" . (int)$weight_class_id . "', language_id = '" . (int)$language_id . "', title = '" . $this->db->escape($value['title']) . "', unit = '" . $this->db->escape($value['unit']) . "'");
		}

		$this->cache->delete('weight_class');
		
		return $weight_class_id;
	}

	public function editWeightClass($weight_class_id, $data) {
		$this->db->query("UPDATE " . DB_PREFIX . "weight_class SET value = '" . (float)$data['value'] . "' WHERE weight_class_id = '" . (int)$weight_class_id . "'");

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

		foreach ($data['weight_class_description'] as $language_id => $value) {
			$this->db->query("INSERT INTO " . DB_PREFIX . "weight_class_description SET weight_class_id = '" . (int)$weight_class_id . "', language_id = '" . (int)$language_id . "', title = '" . $this->db->escape($value['title']) . "', unit = '" . $this->db->escape($value['unit']) . "'");
		}

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

	public function deleteWeightClass($weight_class_id) {
		$this->db->query("DELETE FROM " . DB_PREFIX . "weight_class WHERE weight_class_id = '" . (int)$weight_class_id . "'");
		$this->db->query("DELETE FROM " . DB_PREFIX . "weight_class_description WHERE weight_class_id = '" . (int)$weight_class_id . "'");

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

	public function getWeightClasses($data = array()) {
		if ($data) {
			$sql = "SELECT * FROM " . DB_PREFIX . "weight_class wc LEFT JOIN " . DB_PREFIX . "weight_class_description wcd ON (wc.weight_class_id = wcd.weight_class_id) WHERE wcd.language_id = '" . (int)$this->config->get('config_language_id') . "'";

			$sort_data = array(
				'title',
				'unit',
				'value'
			);

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