OpenCart 🇺🇦

if ($data) {
	$sql = "SELECT * FROM " . DB_PREFIX . "voucher_theme vt LEFT JOIN " . DB_PREFIX . "voucher_theme_description vtd ON (vt.voucher_theme_id = vtd.voucher_theme_id) WHERE vtd.language_id = '" . (int)$this->config->get('config_language_id') . "' ORDER BY vtd.name";	
	
	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;
		}				

		if ($data['limit'] < 1) {
			$data['limit'] = 20;
		}	
	
		$sql .= " LIMIT " . (int)$data['start'] . "," . (int)$data['limit'];
	}	
	
	$query = $this->db->query($sql);
	
	return $query->rows;
} else {
	$voucher_theme_data = $this->cache->get('voucher_theme.' . (int)$this->config->get('config_language_id'));

	if (!$voucher_theme_data) {
		$query = $this->db->query("SELECT * FROM " . DB_PREFIX . "voucher_theme vt LEFT JOIN " . DB_PREFIX . "voucher_theme_description vtd ON (vt.voucher_theme_id = vtd.voucher_theme_id) WHERE vtd.language_id = '" . (int)$this->config->get('config_language_id') . "' ORDER BY vtd.name");

		$voucher_theme_data = $query->rows;
	
		$this->cache->set('voucher_theme.' . (int)$this->config->get('config_language_id'), $voucher_theme_data);
	}	

	return $voucher_theme_data;				
}