Commerce Cart Link

@WorldFallz thanks for the advice. The reason I upload it to Github is because I thought will be easier for someone to troubleshoot. Also, I wanted to make most of my project open source so I thought that but uploading in GitHub will be a good practice for myself.

What I’m trying to accomplished is having a module where I can add a product by click a url. By doing this I will be able to insert my product in an attribute () and add the product to the cart.

The module is not too long so the problem should be some here in there.

<?php
/**
* Implements hook_menu().
*/
function commerce_cart_link_menu() {
  $items['product/add/%/%'] = array (
    'page callback' => 'commerce_cart_link_product_add',
    'page arguments' => array(2,3),
    'access arguments' => array('access content'), 
    'type' => MENU_CALLBACK,
  );  
  return $items;
}  
?>

<?php
/**
* Custom function to add product(s) to a cart by product id, submitted by a form and looking for an affiliate cookie
*/
function commerce_cart_link_product_form_add($pid,$quantity=1) {
       $other = $_POST["other_info"];
       $affiliate = $_COOKIE['mysite_affiliate_id'];
    if ($product = commerce_product_load($pid) ) {
        global $user;
        $uid = $user->uid;    
        $line_item = commerce_product_line_item_new($product, $quantity);
        $line_item->field_ticket_type['und'][]['value'] = 0;
        $line_item->field_other['und'][]['value'] = $other;
        $line_item->field_affiliate['und'][]['uid'] = $affiliate;
        $line_item = commerce_cart_product_add($uid, $line_item, FALSE);
        
        drupal_goto('checkout');
    }    
}
?>

Any help will be appreciated.