OpenCart 🇺🇦

// Validate cart has products and has stock.
if ((!$this->cart->hasProducts() && empty($this->session->data['vouchers'])) || (!$this->cart->hasStock() && !$this->config->get('config_stock_checkout'))) {
	$this->redirect($this->url->link('checkout/cart'));
}

// Validate minimum quantity requirments.			
$products = $this->cart->getProducts();

foreach ($products as $product) {
	$product_total = 0;

	foreach ($products as $product_2) {
		if ($product_2['product_id'] == $product['product_id']) {
			$product_total += $product_2['quantity'];
		}
	}		

	if ($product['minimum'] > $product_total) {
		$this->redirect($this->url->link('checkout/cart'));
	}				
}

$this->language->load('checkout/checkout');

$this->document->setTitle($this->language->get('heading_title')); 
$this->document->addScript('catalog/view/javascript/jquery/colorbox/jquery.colorbox-min.js');
$this->document->addStyle('catalog/view/javascript/jquery/colorbox/colorbox.css');

$this->data['breadcrumbs'] = array();

$this->data['breadcrumbs'][] = array(
	'text'      => $this->language->get('text_home'),
	'href'      => $this->url->link('common/home'),
	'separator' => false
);

$this->data['breadcrumbs'][] = array(
	'text'      => $this->language->get('text_cart'),
	'href'      => $this->url->link('checkout/cart'),
	'separator' => $this->language->get('text_separator')
);

$this->data['breadcrumbs'][] = array(
	'text'      => $this->language->get('heading_title'),
	'href'      => $this->url->link('checkout/checkout', '', 'SSL'),
	'separator' => $this->language->get('text_separator')
);

$this->data['heading_title'] = $this->language->get('heading_title');

$this->data['text_checkout_option'] = $this->language->get('text_checkout_option');
$this->data['text_checkout_account'] = $this->language->get('text_checkout_account');
$this->data['text_checkout_payment_address'] = $this->language->get('text_checkout_payment_address');
$this->data['text_checkout_shipping_address'] = $this->language->get('text_checkout_shipping_address');
$this->data['text_checkout_shipping_method'] = $this->language->get('text_checkout_shipping_method');
$this->data['text_checkout_payment_method'] = $this->language->get('text_checkout_payment_method');		
$this->data['text_checkout_confirm'] = $this->language->get('text_checkout_confirm');
$this->data['text_modify'] = $this->language->get('text_modify');

$this->data['logged'] = $this->customer->isLogged();
$this->data['shipping_required'] = $this->cart->hasShipping();	

if (file_exists(DIR_TEMPLATE . $this->config->get('config_template') . '/template/checkout/checkout.tpl')) {
	$this->template = $this->config->get('config_template') . '/template/checkout/checkout.tpl';
} else {
	$this->template = 'default/template/checkout/checkout.tpl';
}

$this->children = array(
	'common/column_left',
	'common/column_right',
	'common/content_top',
	'common/content_bottom',
	'common/footer',
	'common/header'	
);

if (isset($this->request->get['quickconfirm'])) {
	$this->data['quickconfirm'] = $this->request->get['quickconfirm'];
}

$this->response->setOutput($this->render());