VirtueMate to HikaShop switch. SOAP service?

<?php

define( '_VALID_MOS', 1 );
define( '_JEXEC', 1 );

ob_start();

$mosConfig_absolute_path= realpath( dirname(__FILE__).'/../../../..' );
require_once( $mosConfig_absolute_path.'/configuration.php' );

// init joomla cfg
//
define('JPATH_BASE', $mosConfig_absolute_path );
define( 'DS', DIRECTORY_SEPARATOR );
require_once ( JPATH_BASE .DS.'includes'.DS.'defines.php' );
require_once ( JPATH_BASE .DS.'includes'.DS.'framework.php' );

// for HikaShop:
require_once ( JPATH_BASE .DS.'components'.DS.'com_hikashop'.DS.'helpers'.DS.'helper.php' );


// INITIALISE THE APPLICATION
$mainframe =& JFactory::getApplication('site');
$mainframe->initialise();



//****************************************************************************************
// Helper Methods:
//****************************************************************************************

	// -----------------------------------------
	function AddUserToJoomla( $params )
	{
		return 0;
	}
	
	// -----------------------------------------
	function CreateOrder( $user_id )
	{
		return 0;
	}

	// -----------------------------------------
	function UpdateOrderStatus( $new_order )
	{
		return 0;
	}
	
//****************************************************************************************
// SOAP entry points:
//****************************************************************************************

	// -----------------------------------------
	function AddUser($params) 
	{ 
		// Step 1: Add new user into Joomla
		$is_added = AddUserToJoomla( $params );
	
		if( $is_added )
		{
			// Step 2: Add new order with Valentina Studio product for 3 OS.
			//			This order belongs to just added new user.
			//
			$new_order = CreateOrder( /* $_REQUEST['user_id'] */ );
			if( $new_order > 0 )
			{
				// Step 3: Change the status of this order to Shiped to foce
				//	a) generation of serials
				// 	b) sending of Letter with serials to user.
				//
				$status_updated = UpdateOrderStatus( $new_order );
				if( $status_updated )
				{
					$res_str = "Success! Please check your mailbox. You should get 3 letters with serials for Mac OS X, Windows and Linux.";
				}
				else
				{
					$res_str = new SoapFault( "UpdateOrderStatusFault", "Cannot update OrderStatus  :" . $d['order_id'] );
				}
			}
			else // $new_order
			{
				$res_str = new SoapFault( "CreateOrderFault", "Cannot create order for user_id : " . $user_id );				
			}
		}
		else // $is_added
		{
			$res_str = new SoapFault( "JoomlaAddUserFault", "Cannot create user: " . $params->User->login );
		}
		
		// Return string about success OR error description.
		return $res_str;
	}



	// -----------------------------------------
	// CHECK if the given login of user exists in the table USERS of Joomla DB.
	// RETURNS "1" if exists, "0" - if not exists
	//
	function CheckUserLogin($params) { 
		$db = JFactory::getDBO();	

		$value=$params->login;
		$db->setQuery( "SELECT id FROM #__users WHERE username = '$value'" );
		$db->execute();
		
		return $db->getNumRows() > 0 ? "1" : "0";		
	}
	

	// -----------------------------------------
	// CHECK if the given email exists in the table USERS of Joomla DB.
	// RETURNS "1" if exists, "0" - if not exists
	//
	function CheckUserEmail($params) { 
		$db = JFactory::getDBO();	

		$value=$params->email;
		$q = "SELECT id FROM #__users WHERE email = '$value'";
		$db->execute();
		
		return $db->getNumRows() > 0 ? "1" : "0";		
	}
	
	 
//clean buffer
ob_end_clean();
	
	/* SOAP SETTINGS */
	$server = new SoapServer('VM_Users.wsdl');
	
	/* Add Functions */
	$server->addFunction( "AddUser" );
	$server->addFunction( "CheckUserLogin" );
	$server->addFunction( "CheckUserEmail" );

	$server->handle();
?> 

function AddUser2($params) {
	
		include('../vm_soa_conf.php');
		
		$ps_user = new ps_user();
		
		$_SESSION["ps_vendor_id"] = "1";
		$_SESSION["auth"]		  = "admin";

		$user['username']   = $params->User->login;
		$user['email']      = $params->User->email;
		$user['password']   = $params->User->password;
		$user['password2']  = $params->User->password;
		$user['first_name'] = $params->User->firstname;
		$user['last_name']  = $params->User->lastname;

		$_POST['email']	    = $user['email'];
		$_POST['usertype']	= "Registered";
		$_POST['agreed']	= "1";
		$_POST['block']	    = "0";
		$_POST['sendEmail']	= "0";
		$_POST['username']  = $user['username'];
		$_POST['name']      = $user['username'];
		$_POST['password']  = $user['password'];
		$_POST['password2'] = $user['password'];
		$_POST['gid'] 		= "18"; //registred
		
		// CALL to VM STORE:
		$is_added = $ps_user->add($user);
		
		// RETURN:
		return $is_added;
}

function AddUserToJoomla( $params )
{
	$userClass = hikashop_get('class.user');

	return 0;
}

function getID($cms_id,$type='cms'){
		$user = $this->get($cms_id,$type);
		$id = (int)@$user->user_id;

		if(empty($id)&&$type=='cms'){
			$userData = JFactory::getUser($cms_id);
			if(!empty($userData)){
				$user = new stdClass();
				$user->user_cms_id = $cms_id;
				$user->user_email = $userData->email;
				$id = $this->save($user);
			}

		}

		return $id;
	}

  new hikashopUserClass ?

$userClass = hikashop_get('class.user');

$userClass = hikashop_get('class.user');
$user = $userClass->get($user_id);
$guest = !(bool)@$user->user_cms_id;

function getID($cms_id,$type='cms'){
		$user = $this->get($cms_id,$type);
		$id = (int)@$user->user_id;

		if(empty($id)&&$type=='cms'){
			$userData = JFactory::getUser($cms_id);
			if(!empty($userData)){
				$user = new stdClass();
				$user->user_cms_id = $cms_id;
				$user->user_email = $userData->email;
				$id = $this->save($user);
			}

		}

		return $id;
	}

	function save(&$element,$skipJoomla=false){
		$new = true;
		if(!empty($element->user_id)){
			$new = false;
		}else{
			if(empty($element->user_created_ip)){
				$element->user_created_ip = hikashop_getIP();
			}
			if(empty($element->user_created)){
				$element->user_created = time();
			}
			if(empty($element->user_email)&&!empty($element->user_cms_id)){
				$user = JFactory::getUser($element->user_cms_id);
				$element->user_email = $user->email;
			}elseif(!empty($element->user_email)&&empty($element->user_cms_id)){
			}
		}

function saveForm(){
...
		$element = $fieldsClass->getInput('user',$oldUser);
...
		$element->user_id = $user_id;
		$status = $this->save($element);
...

function register(&$checkout,$page='checkout',$redirect=true){
...
		$userData = $fieldClass->getInput('user',$old,!@$checkout->cart_update);
...
				$this->user_id = $this->save($userData);
...

	function AddUserToJoomla( $params )
	{
		$user = new JUser;

		// RZ: if you look into code of bind() function, you will see it cares first of all
		// about username and passwords, making hash of password also.
		// So these 3 params we assign to using via bind(), all rest params via set() methods.
		//
		$data = array( 
			'username' => $params->User->login,
			'password' => $params->User->password,
			'password2'=> $params->User->password,
		);

		$bind_res = $user->bind($data);

		$user->set( 'name'		, $params->User->firstname.' '.$params->User->lastname );
		$user->set( 'email'		, $params->User->email );
		$user->set( 'block'		, 0 );
		$user->set( 'groups'	, array("2")  );
			
		if(	$user->save() )
			return $user->id;
		else
			return false;
	}

	function AddUserToHikaShop( $params, $cms_user_id )
	{
//		$userClass = hikashop_get('class.user');

                ????????????????????????????????????????????????????????????????????????????????
	}
	
//****************************************************************************************
// SOAP entry points:
//****************************************************************************************

	// -----------------------------------------
	function AddUser($params) 
	{ 
		// Step 1: Add new user into Joomla
		$cms_user_id = AddUserToJoomla( $params );
		if( $cms_user_id == false )
			return new SoapFault( "AddUserToJoomlaFault", "Cannot create user: " . $params->User->login );

                // Step 2: Add new user to HikaShop
               $hika_user_id = AddUserToHikaShop(  $cms_user_id );

function CreateOrder( $user_id )
{
// PRODUCTs prepare:

	$productClass = hikashop_get('class.product');

	$product_vstd_lin = $productClass->get( 173 ); 		// VSTD-LIN-NEW
	$product_vstd_lin->order_product_quantity = 1;

	$product_vstd_win = $productClass->get( 175 ); 		// VSTD-MAC-NEW
	$product_vstd_win->order_product_quantity = 1;

	$product_vstd_mac = $productClass->get( 177 ); 	// VSTD-WIN-NEW
	$product_vstd_mac->order_product_quantity = 1;

// ORDER:
	$order = new stdClass();

	$order->order_user_id = $user_id;
	$order->cart = new stdClass();
	//
	$order->cart->products 		= array( $product_vstd_lin );
	$order->cart->products[] 	= $product_vstd_win;
	$order->cart->products[] 	= $product_vstd_mac;

// SAVE:	
	$orderClass = hikashop_get('class.order');
	$order->order_id = $orderClass->save( $order );
	error_log( "CreateOrder: saved with order_id = $order->order_id" );

	return $order;
}

[08-Nov-2014 20:56:27 Europe/Berlin] PHP Notice:  Undefined offset: 175 in /Applications/MAMP/htdocs/valentina-db.net/media/com_hikashop/mail/order_status_notification.preload.php on line 116

$products_ids = array();
foreach($data->cart->products as $item) { $products_ids[] = $item->product_id; }
...
$productClass->getProducts($products_ids);
...
	$product = $productClass->products[$item->product_id];   <<<<<<<<<< here error

[08-Nov-2014 20:56:27 Europe/Berlin] order_status_notification_preload.php -- products_ids
[08-Nov-2014 20:56:27 Europe/Berlin] array(1) {
  [0]=>
  string(3) "175"
}

[08-Nov-2014 20:56:27 Europe/Berlin] order_status_notification_preload.php -- products
[08-Nov-2014 20:56:27 Europe/Berlin] array(0) {
}

$product = $productClass->products[$item->product_id];  
                          ^^^^^^^^^^^