Developers API Tutorial - A Real World Example

[LissaE]

Is there anyone at all that might be able to help get this working? This is a functionality that x-cart for one already has and maybe other carts, though not sure if it is part of the basic functionality without an addon lol

I am pretty sure I won't be the only person who would like to see this be a working functionality in Zen Cart :)

[yellow1912]

If you want to add a product to cart with attribute, it's a very complicated matter. You may want to checkout the add form on that specific product page, and "simulate" that in your observer. For example, you can manually set $_POST values?

[LissaE]

Thanx for your reply yellow, I shall have a look and see if I can do something, I don't as yet actually know how to write this language though I have managed to stumble my way through some other things LOL

[wilt]

Hi,

You can still use the $_SESSION['cart']->add_cart() function.
This takes 3 parameters.

i.e
$_SESSION['cart']->add_cart($productId, $quantity, $attributeIds)

The $attributeIds variable is an array of attribute option/value pairs, and you will need to build this array for yourself.

if the option id = 5, and the value id = 10 then your array would be

$attributeIds[5] = 10;

Also note that for the remove/contents functions that you use, you will have to pass what is called a unique product id.

The unique product id for a product with attributes can be calculated using

zen_get_uprid($productId, $attributeIds)

HTH

[LissaE]

Thanx for the reply Wilt, I really appreciate it :)

I ended up PM'ing yellow1912 and paying a small fee to get it working, which it is, and very similar to what you posted LOL my php knowledge is very limited :)

[mipavluk]

Wilt, could you help me here a bit more? I'm not a php expert... and can't totally understand your post...

I try to contact yellow1912 but don't reply me yet

I don't know how and where add your post in my file.... could you please help me more?

<?php
/**
 * Observer class used to add a free product to the cart if the user spends more than $x
 *
 */
class freeProduct extends base {
 /**
  * The threshold amount the customer needs to spend.
  * 
  * Note this is defined in the shops base currency, and so works with multi currency shops
  *
  * @var decimal
  */
 var $freeAmount = 1;
 /**
  * The id of the free product.
  * 
  * Note. This must be a true free product. e.g. price = 0 Also make sure that if you don't want the customer
  * to be charged shipping on this, that you have it set correctly.
  *
  * @var integer
  */
 var $freeProductID = 4660;
 /**
  * constructor method
  * 
  * Attaches our class to the $_SESSION['cart'] class and watches for 2 notifier events.
  */
 function freeProduct() {
  $_SESSION['cart']->attach($this, array('NOTIFIER_CART_ADD_CART_END', 'NOTIFIER_CART_REMOVE_END'));
 }
 /**
  * Update Method
  * 
  * Called by observed class when any of our notifiable events occur
  *
  * @param object $class
  * @param string $eventID
  */
 function update(&$class, $eventID) {
  if ($_SESSION['cart']->show_total() >= $this->freeAmount && !$_SESSION['cart']->in_cart($this->freeProductID) ) {
   $_SESSION['cart']->add_cart($this->freeProductID);
  }
  if ($_SESSION['cart']->show_total() < $this->freeAmount && $_SESSION['cart']->in_cart($this->freeProductID) ) {
   $_SESSION['cart']->remove($this->freeProductID);
  }
  if ($_SESSION['cart']->in_cart($this->freeProductID)) {
   $_SESSION['cart']->contents[$this->freeProductID]['qty'] = 1;
  }
 }
}
?>

thanks in advance...

[kuroi]

Wilt is sharing some helpful tools that can be used in the update function. How they are used would depend upon the specifics of what you are trying to do.

[mipavluk]

I just want offer a free gift with a purchase... my products and gifts are only digital, only downloadable.... the file works perfectly but the download link do not appear in the order/account of my customer... so, can't download the free gift...

[kuroi]

Marta, what you will need to do is get the product ID for your gift and the option and option values its download attribute and build the attribute array as wilt suggests above. Then replace the

$_SESSION['cart']->add_cart($this->freeProductID);

line in the tutorial with the longer

$productId = YOUR_PRODUCT_ID;
$attributeIds[YOUR_OPTION_ID] = YOUR_OPTION_VALUE_ID;
$_SESSION['cart']->add_cart($productId, 1, $attributeIds);

[mipavluk]

where I found my option ID and my option value ID??

I take a look in my attributes area... and for my zip I found this:

ID: 8229
Option Name: Download 01
Option Value: Download 01


I'm still a bit confused here