OpenCart 🇺🇦

if (!$this->user->hasPermission('modify', 'sale/order')) {
	$this->error['warning'] = $this->language->get('error_permission');
}

if ((utf8_strlen($this->request->post['firstname']) < 1) || (utf8_strlen($this->request->post['firstname']) > 32)) {
	$this->error['firstname'] = $this->language->get('error_firstname');
}

if ((utf8_strlen($this->request->post['lastname']) < 1) || (utf8_strlen($this->request->post['lastname']) > 32)) {
	$this->error['lastname'] = $this->language->get('error_lastname');
}

if ((utf8_strlen($this->request->post['email']) > 96) || (!preg_match('/^[^\@]+@.*\.[a-z]{2,6}$/i', $this->request->post['email']))) {
	$this->error['email'] = $this->language->get('error_email');
}

if ((utf8_strlen($this->request->post['telephone']) < 3) || (utf8_strlen($this->request->post['telephone']) > 32)) {
	$this->error['telephone'] = $this->language->get('error_telephone');
}

if ((utf8_strlen($this->request->post['payment_firstname']) < 1) || (utf8_strlen($this->request->post['payment_firstname']) > 32)) {
	$this->error['payment_firstname'] = $this->language->get('error_firstname');
}

if ((utf8_strlen($this->request->post['payment_lastname']) < 1) || (utf8_strlen($this->request->post['payment_lastname']) > 32)) {
	$this->error['payment_lastname'] = $this->language->get('error_lastname');
}

if ((utf8_strlen($this->request->post['payment_address_1']) < 3) || (utf8_strlen($this->request->post['payment_address_1']) > 128)) {
	$this->error['payment_address_1'] = $this->language->get('error_address_1');
}

if ((utf8_strlen($this->request->post['payment_city']) < 3) || (utf8_strlen($this->request->post['payment_city']) > 128)) {
	$this->error['payment_city'] = $this->language->get('error_city');
}

$this->load->model('localisation/country');

$country_info = $this->model_localisation_country->getCountry($this->request->post['payment_country_id']);

if ($country_info) {
	if ($country_info['postcode_required'] && (utf8_strlen($this->request->post['payment_postcode']) < 2) || (utf8_strlen($this->request->post['payment_postcode']) > 10)) {
		$this->error['payment_postcode'] = $this->language->get('error_postcode');
	}

	// VAT Validation
	$this->load->helper('vat');

	if ($this->config->get('config_vat') && $this->request->post['payment_tax_id'] && (vat_validation($country_info['iso_code_2'], $this->request->post['payment_tax_id']) == 'invalid')) {
		$this->error['payment_tax_id'] = $this->language->get('error_vat');
	}
}

if ($this->request->post['payment_country_id'] == '') {
	$this->error['payment_country'] = $this->language->get('error_country');
}

if (!isset($this->request->post['payment_zone_id']) || $this->request->post['payment_zone_id'] == '') {
	$this->error['payment_zone'] = $this->language->get('error_zone');
}

if (!isset($this->request->post['payment_method']) || $this->request->post['payment_method'] == '') {
	$this->error['payment_method'] = $this->language->get('error_payment');
}

// Check if any products require shipping
$shipping = false;

if (isset($this->request->post['order_product'])) {
	$this->load->model('catalog/product');

	foreach ($this->request->post['order_product'] as $order_product) {
		$product_info = $this->model_catalog_product->getProduct($order_product['product_id']);

		if ($product_info && $product_info['shipping']) {
			$shipping = true;
		}
	}
}

if ($shipping) {
	if ((utf8_strlen($this->request->post['shipping_firstname']) < 1) || (utf8_strlen($this->request->post['shipping_firstname']) > 32)) {
		$this->error['shipping_firstname'] = $this->language->get('error_firstname');
	}

	if ((utf8_strlen($this->request->post['shipping_lastname']) < 1) || (utf8_strlen($this->request->post['shipping_lastname']) > 32)) {
		$this->error['shipping_lastname'] = $this->language->get('error_lastname');
	}

	if ((utf8_strlen($this->request->post['shipping_address_1']) < 3) || (utf8_strlen($this->request->post['shipping_address_1']) > 128)) {
		$this->error['shipping_address_1'] = $this->language->get('error_address_1');
	}

	if ((utf8_strlen($this->request->post['shipping_city']) < 3) || (utf8_strlen($this->request->post['shipping_city']) > 128)) {
		$this->error['shipping_city'] = $this->language->get('error_city');
	}

	$this->load->model('localisation/country');

	$country_info = $this->model_localisation_country->getCountry($this->request->post['shipping_country_id']);

	if ($country_info && $country_info['postcode_required'] && (utf8_strlen($this->request->post['shipping_postcode']) < 2) || (utf8_strlen($this->request->post['shipping_postcode']) > 10)) {
		$this->error['shipping_postcode'] = $this->language->get('error_postcode');
	}

	if ($this->request->post['shipping_country_id'] == '') {
		$this->error['shipping_country'] = $this->language->get('error_country');
	}

	if (!isset($this->request->post['shipping_zone_id']) || $this->request->post['shipping_zone_id'] == '') {
		$this->error['shipping_zone'] = $this->language->get('error_zone');
	}

	if (!$this->request->post['shipping_method']) {
		$this->error['shipping_method'] = $this->language->get('error_shipping');
	}
}

if ($this->error && !isset($this->error['warning'])) {
	$this->error['warning'] = $this->language->get('error_warning');
}

if (!$this->error) {
	return true;
} else {
	return false;
}