system/libraries/Cart.php - code-igniter-v3-giggi - Gitiles

 <?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
 /**
  * CodeIgniter
  *
  * An open source application development framework for PHP 5.1.6 or newer
  *
  * @package		CodeIgniter
  * @author		ExpressionEngine Dev Team
  * @copyright	Copyright (c) 2006 - 2011, EllisLab, Inc.
  * @license		http://codeigniter.com/user_guide/license.html
  * @link		http://codeigniter.com
  * @since		Version 1.0
  * @filesource
  */

 // ------------------------------------------------------------------------

 /**
  * Shopping Cart Class
  *
  * @package		CodeIgniter
  * @subpackage	Libraries
  * @category	Shopping Cart
  * @author		ExpressionEngine Dev Team
  * @link		http://codeigniter.com/user_guide/libraries/cart.html
  */
 class CI_Cart {

 	// These are the regular expression rules that we use to validate the product ID and product name
 	var $product_id_rules	= '\.a-z0-9_-'; // alpha-numeric, dashes, underscores, or periods
 	var $product_name_rules	= '\.\:\-_ a-z0-9'; // alpha-numeric, dashes, underscores, colons or periods

 	// Private variables.  Do not change!
 	var $CI;
 	var $_cart_contents	= array();


 	/**
 	 * Shopping Class Constructor
 	 *
 	 * The constructor loads the Session class, used to store the shopping cart contents.
 	 */
 	public function __construct($params = array())
 	{
 		// Set the super object to a local variable for use later
 		$this->CI =& get_instance();

 		// Are any config settings being passed manually?  If so, set them
 		$config = array();
 		if (count($params) > 0)
 		{
 			foreach ($params as $key => $val)
 			{
 				$config[$key] = $val;
 			}
 		}

 		// Load the Sessions class
 		$this->CI->load->library('session', $config);

 		// Grab the shopping cart array from the session table, if it exists
 		if ($this->CI->session->userdata('cart_contents') !== FALSE)
 		{
 			$this->_cart_contents = $this->CI->session->userdata('cart_contents');
 		}
 		else
 		{
 			// No cart exists so we'll set some base values
 			$this->_cart_contents['cart_total'] = 0;
 			$this->_cart_contents['total_items'] = 0;
 		}

 		log_message('debug', "Cart Class Initialized");
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Insert items into the cart and save it to the session table
 	 *
 	 * @access	public
 	 * @param	array
 	 * @return	bool
 	 */
 	function insert($items = array())
 	{
 		// Was any cart data passed? No? Bah...
 		if ( ! is_array($items) OR count($items) == 0)
 		{
 			log_message('error', 'The insert method must be passed an array containing data.');
 			return FALSE;
 		}

 		// You can either insert a single product using a one-dimensional array,
 		// or multiple products using a multi-dimensional one. The way we
 		// determine the array type is by looking for a required array key named "id"
 		// at the top level. If it's not found, we will assume it's a multi-dimensional array.

 		$save_cart = FALSE;
 		if (isset($items['id']))
 		{
 			if ($this->_insert($items) == TRUE)
 			{
 				$save_cart = TRUE;
 			}
 		}
 		else
 		{
 			foreach ($items as $val)
 			{
 				if (is_array($val) AND isset($val['id']))
 				{
 					if ($this->_insert($val) == TRUE)
 					{
 						$save_cart = TRUE;
 					}
 				}
 			}
 		}

 		// Save the cart data if the insert was successful
 		if ($save_cart == TRUE)
 		{
 			$this->_save_cart();
 			return TRUE;
 		}

 		return FALSE;
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Insert
 	 *
 	 * @access	private
 	 * @param	array
 	 * @return	bool
 	 */
 	function _insert($items = array())
 	{
 		// Was any cart data passed? No? Bah...
 		if ( ! is_array($items) OR count($items) == 0)
 		{
 			log_message('error', 'The insert method must be passed an array containing data.');
 			return FALSE;
 		}

 		// --------------------------------------------------------------------

 		// Does the $items array contain an id, quantity, price, and name?  These are required
 		if ( ! isset($items['id']) OR ! isset($items['qty']) OR ! isset($items['price']) OR ! isset($items['name']))
 		{
 			log_message('error', 'The cart array must contain a product ID, quantity, price, and name.');
 			return FALSE;
 		}

 		// --------------------------------------------------------------------

 		// Prep the quantity. It can only be a number.  Duh...
 		$items['qty'] = trim(preg_replace('/([^0-9])/i', '', $items['qty']));
 		// Trim any leading zeros
 		$items['qty'] = trim(preg_replace('/(^[0]+)/i', '', $items['qty']));

 		// If the quantity is zero or blank there's nothing for us to do
 		if ( ! is_numeric($items['qty']) OR $items['qty'] == 0)
 		{
 			return FALSE;
 		}

 		// --------------------------------------------------------------------

 		// Validate the product ID. It can only be alpha-numeric, dashes, underscores or periods
 		// Not totally sure we should impose this rule, but it seems prudent to standardize IDs.
 		// Note: These can be user-specified by setting the $this->product_id_rules variable.
 		if ( ! preg_match("/^[".$this->product_id_rules."]+$/i", $items['id']))
 		{
 			log_message('error', 'Invalid product ID.  The product ID can only contain alpha-numeric characters, dashes, and underscores');
 			return FALSE;
 		}

 		// --------------------------------------------------------------------

 		// Validate the product name. It can only be alpha-numeric, dashes, underscores, colons or periods.
 		// Note: These can be user-specified by setting the $this->product_name_rules variable.
 		if ( ! preg_match("/^[".$this->product_name_rules."]+$/i", $items['name']))
 		{
 			log_message('error', 'An invalid name was submitted as the product name: '.$items['name'].' The name can only contain alpha-numeric characters, dashes, underscores, colons, and spaces');
 			return FALSE;
 		}

 		// --------------------------------------------------------------------

 		// Prep the price.  Remove anything that isn't a number or decimal point.
 		$items['price'] = trim(preg_replace('/([^0-9\.])/i', '', $items['price']));
 		// Trim any leading zeros
 		$items['price'] = trim(preg_replace('/(^[0]+)/i', '', $items['price']));

 		// Is the price a valid number?
 		if ( ! is_numeric($items['price']))
 		{
 			log_message('error', 'An invalid price was submitted for product ID: '.$items['id']);
 			return FALSE;
 		}

 		// --------------------------------------------------------------------

 		// We now need to create a unique identifier for the item being inserted into the cart.
 		// Every time something is added to the cart it is stored in the master cart array.
 		// Each row in the cart array, however, must have a unique index that identifies not only
 		// a particular product, but makes it possible to store identical products with different options.
 		// For example, what if someone buys two identical t-shirts (same product ID), but in
 		// different sizes?  The product ID (and other attributes, like the name) will be identical for
 		// both sizes because it's the same shirt. The only difference will be the size.
 		// Internally, we need to treat identical submissions, but with different options, as a unique product.
 		// Our solution is to convert the options array to a string and MD5 it along with the product ID.
 		// This becomes the unique "row ID"
 		if (isset($items['options']) AND count($items['options']) > 0)
 		{
 			$rowid = md5($items['id'].implode('', $items['options']));
 		}
 		else
 		{
 			// No options were submitted so we simply MD5 the product ID.
 			// Technically, we don't need to MD5 the ID in this case, but it makes
 			// sense to standardize the format of array indexes for both conditions
 			$rowid = md5($items['id']);
 		}

 		// --------------------------------------------------------------------

 		// Now that we have our unique "row ID", we'll add our cart items to the master array

 		// let's unset this first, just to make sure our index contains only the data from this submission
 		unset($this->_cart_contents[$rowid]);

 		// Create a new index with our new row ID
 		$this->_cart_contents[$rowid]['rowid'] = $rowid;

 		// And add the new items to the cart array
 		foreach ($items as $key => $val)
 		{
 			$this->_cart_contents[$rowid][$key] = $val;
 		}

 		// Woot!
 		return TRUE;
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Update the cart
 	 *
 	 * This function permits the quantity of a given item to be changed.
 	 * Typically it is called from the "view cart" page if a user makes
 	 * changes to the quantity before checkout. That array must contain the
 	 * product ID and quantity for each item.
 	 *
 	 * @access	public
 	 * @param	array
 	 * @param	string
 	 * @return	bool
 	 */
 	function update($items = array())
 	{
 		// Was any cart data passed?
 		if ( ! is_array($items) OR count($items) == 0)
 		{
 			return FALSE;
 		}

 		// You can either update a single product using a one-dimensional array,
 		// or multiple products using a multi-dimensional one.  The way we
 		// determine the array type is by looking for a required array key named "id".
 		// If it's not found we assume it's a multi-dimensional array
 		$save_cart = FALSE;
 		if (isset($items['rowid']) AND isset($items['qty']))
 		{
 			if ($this->_update($items) == TRUE)
 			{
 				$save_cart = TRUE;
 			}
 		}
 		else
 		{
 			foreach ($items as $val)
 			{
 				if (is_array($val) AND isset($val['rowid']) AND isset($val['qty']))
 				{
 					if ($this->_update($val) == TRUE)
 					{
 						$save_cart = TRUE;
 					}
 				}
 			}
 		}

 		// Save the cart data if the insert was successful
 		if ($save_cart == TRUE)
 		{
 			$this->_save_cart();
 			return TRUE;
 		}

 		return FALSE;
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Update the cart
 	 *
 	 * This function permits the quantity of a given item to be changed.
 	 * Typically it is called from the "view cart" page if a user makes
 	 * changes to the quantity before checkout. That array must contain the
 	 * product ID and quantity for each item.
 	 *
 	 * @access	private
 	 * @param	array
 	 * @return	bool
 	 */
 	function _update($items = array())
 	{
 		// Without these array indexes there is nothing we can do
 		if ( ! isset($items['qty']) OR ! isset($items['rowid']) OR ! isset($this->_cart_contents[$items['rowid']]))
 		{
 			return FALSE;
 		}

 		// Prep the quantity
 		$items['qty'] = preg_replace('/([^0-9])/i', '', $items['qty']);

 		// Is the quantity a number?
 		if ( ! is_numeric($items['qty']))
 		{
 			return FALSE;
 		}

 		// Is the new quantity different than what is already saved in the cart?
 		// If it's the same there's nothing to do
 		if ($this->_cart_contents[$items['rowid']]['qty'] == $items['qty'])
 		{
 			return FALSE;
 		}

 		// Is the quantity zero?  If so we will remove the item from the cart.
 		// If the quantity is greater than zero we are updating
 		if ($items['qty'] == 0)
 		{
 			unset($this->_cart_contents[$items['rowid']]);
 		}
 		else
 		{
 			$this->_cart_contents[$items['rowid']]['qty'] = $items['qty'];
 		}

 		return TRUE;
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Save the cart array to the session DB
 	 *
 	 * @access	private
 	 * @return	bool
 	 */
 	function _save_cart()
 	{
 		// Unset these so our total can be calculated correctly below
 		unset($this->_cart_contents['total_items']);
 		unset($this->_cart_contents['cart_total']);

 		// Lets add up the individual prices and set the cart sub-total
 		$total = 0;
 		foreach ($this->_cart_contents as $key => $val)
 		{
 			// We make sure the array contains the proper indexes
 			if ( ! is_array($val) OR ! isset($val['price']) OR ! isset($val['qty']))
 			{
 				continue;
 			}

 			$total += ($val['price'] * $val['qty']);

 			// Set the subtotal
 			$this->_cart_contents[$key]['subtotal'] = ($this->_cart_contents[$key]['price'] * $this->_cart_contents[$key]['qty']);
 		}

 		// Set the cart total and total items.
 		$this->_cart_contents['total_items'] = count($this->_cart_contents);
 		$this->_cart_contents['cart_total'] = $total;

 		// Is our cart empty?  If so we delete it from the session
 		if (count($this->_cart_contents) <= 2)
 		{
 			$this->CI->session->unset_userdata('cart_contents');

 			// Nothing more to do... coffee time!
 			return FALSE;
 		}

 		// If we made it this far it means that our cart has data.
 		// Let's pass it to the Session class so it can be stored
 		$this->CI->session->set_userdata(array('cart_contents' => $this->_cart_contents));

 		// Woot!
 		return TRUE;
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Cart Total
 	 *
 	 * @access	public
 	 * @return	integer
 	 */
 	function total()
 	{
 		return $this->_cart_contents['cart_total'];
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Total Items
 	 *
 	 * Returns the total item count
 	 *
 	 * @access	public
 	 * @return	integer
 	 */
 	function total_items()
 	{
 		return $this->_cart_contents['total_items'];
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Cart Contents
 	 *
 	 * Returns the entire cart array
 	 *
 	 * @access	public
 	 * @return	array
 	 */
 	function contents()
 	{
 		$cart = $this->_cart_contents;

 		// Remove these so they don't create a problem when showing the cart table
 		unset($cart['total_items']);
 		unset($cart['cart_total']);

 		return $cart;
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Has options
 	 *
 	 * Returns TRUE if the rowid passed to this function correlates to an item
 	 * that has options associated with it.
 	 *
 	 * @access	public
 	 * @return	array
 	 */
 	function has_options($rowid = '')
 	{
 		if ( ! isset($this->_cart_contents[$rowid]['options']) OR count($this->_cart_contents[$rowid]['options']) === 0)
 		{
 			return FALSE;
 		}

 		return TRUE;
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Product options
 	 *
 	 * Returns the an array of options, for a particular product row ID
 	 *
 	 * @access	public
 	 * @return	array
 	 */
 	function product_options($rowid = '')
 	{
 		if ( ! isset($this->_cart_contents[$rowid]['options']))
 		{
 			return array();
 		}

 		return $this->_cart_contents[$rowid]['options'];
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Format Number
 	 *
 	 * Returns the supplied number with commas and a decimal point.
 	 *
 	 * @access	public
 	 * @return	integer
 	 */
 	function format_number($n = '')
 	{
 		if ($n == '')
 		{
 			return '';
 		}

 		// Remove anything that isn't a number or decimal point.
 		$n = trim(preg_replace('/([^0-9\.])/i', '', $n));

 		return number_format($n, 2, '.', ',');
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Destroy the cart
 	 *
 	 * Empties the cart and kills the session
 	 *
 	 * @access	public
 	 * @return	null
 	 */
 	function destroy()
 	{
 		unset($this->_cart_contents);

 		$this->_cart_contents['cart_total'] = 0;
 		$this->_cart_contents['total_items'] = 0;

 		$this->CI->session->unset_userdata('cart_contents');
 	}


 }
 // END Cart Class

 /* End of file Cart.php */
 /* Location: ./system/libraries/Cart.php */
	<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
	/**
	* CodeIgniter
	*
	* An open source application development framework for PHP 5.1.6 or newer
	*
	* @package CodeIgniter
	* @author ExpressionEngine Dev Team
	* @copyright Copyright (c) 2006 - 2011, EllisLab, Inc.
	* @license http://codeigniter.com/user_guide/license.html
	* @link http://codeigniter.com
	* @since Version 1.0
	* @filesource
	*/

	// ------------------------------------------------------------------------

	/**
	* Shopping Cart Class
	*
	* @package CodeIgniter
	* @subpackage Libraries
	* @category Shopping Cart
	* @author ExpressionEngine Dev Team
	* @link http://codeigniter.com/user_guide/libraries/cart.html
	*/
	class CI_Cart {

	// These are the regular expression rules that we use to validate the product ID and product name
	var $product_id_rules = '\.a-z0-9_-'; // alpha-numeric, dashes, underscores, or periods
	var $product_name_rules = '\.\:\-_ a-z0-9'; // alpha-numeric, dashes, underscores, colons or periods

	// Private variables. Do not change!
	var $CI;
	var $_cart_contents = array();


	/**
	* Shopping Class Constructor
	*
	* The constructor loads the Session class, used to store the shopping cart contents.
	*/
	public function __construct($params = array())
	{
	// Set the super object to a local variable for use later
	$this->CI =& get_instance();

	// Are any config settings being passed manually? If so, set them
	$config = array();
	if (count($params) > 0)
	{
	foreach ($params as $key => $val)
	{
	$config[$key] = $val;
	}
	}

	// Load the Sessions class
	$this->CI->load->library('session', $config);

	// Grab the shopping cart array from the session table, if it exists
	if ($this->CI->session->userdata('cart_contents') !== FALSE)
	{
	$this->_cart_contents = $this->CI->session->userdata('cart_contents');
	}
	else
	{
	// No cart exists so we'll set some base values
	$this->_cart_contents['cart_total'] = 0;
	$this->_cart_contents['total_items'] = 0;
	}

	log_message('debug', "Cart Class Initialized");
	}

	// --------------------------------------------------------------------

	/**
	* Insert items into the cart and save it to the session table
	*
	* @access public
	* @param array
	* @return bool
	*/
	function insert($items = array())
	{
	// Was any cart data passed? No? Bah...
	if ( ! is_array($items) OR count($items) == 0)
	{
	log_message('error', 'The insert method must be passed an array containing data.');
	return FALSE;
	}

	// You can either insert a single product using a one-dimensional array,
	// or multiple products using a multi-dimensional one. The way we
	// determine the array type is by looking for a required array key named "id"
	// at the top level. If it's not found, we will assume it's a multi-dimensional array.

	$save_cart = FALSE;
	if (isset($items['id']))
	{
	if ($this->_insert($items) == TRUE)
	{
	$save_cart = TRUE;
	}
	}
	else
	{
	foreach ($items as $val)
	{
	if (is_array($val) AND isset($val['id']))
	{
	if ($this->_insert($val) == TRUE)
	{
	$save_cart = TRUE;
	}
	}
	}
	}

	// Save the cart data if the insert was successful
	if ($save_cart == TRUE)
	{
	$this->_save_cart();
	return TRUE;
	}

	return FALSE;
	}

	// --------------------------------------------------------------------

	/**
	* Insert
	*
	* @access private
	* @param array
	* @return bool
	*/
	function _insert($items = array())
	{
	// Was any cart data passed? No? Bah...
	if ( ! is_array($items) OR count($items) == 0)
	{
	log_message('error', 'The insert method must be passed an array containing data.');
	return FALSE;
	}

	// --------------------------------------------------------------------

	// Does the $items array contain an id, quantity, price, and name? These are required
	if ( ! isset($items['id']) OR ! isset($items['qty']) OR ! isset($items['price']) OR ! isset($items['name']))
	{
	log_message('error', 'The cart array must contain a product ID, quantity, price, and name.');
	return FALSE;
	}

	// --------------------------------------------------------------------

	// Prep the quantity. It can only be a number. Duh...
	$items['qty'] = trim(preg_replace('/([^0-9])/i', '', $items['qty']));
	// Trim any leading zeros
	$items['qty'] = trim(preg_replace('/(^[0]+)/i', '', $items['qty']));

	// If the quantity is zero or blank there's nothing for us to do
	if ( ! is_numeric($items['qty']) OR $items['qty'] == 0)
	{
	return FALSE;
	}

	// --------------------------------------------------------------------

	// Validate the product ID. It can only be alpha-numeric, dashes, underscores or periods
	// Not totally sure we should impose this rule, but it seems prudent to standardize IDs.
	// Note: These can be user-specified by setting the $this->product_id_rules variable.
	if ( ! preg_match("/^[".$this->product_id_rules."]+$/i", $items['id']))
	{
	log_message('error', 'Invalid product ID. The product ID can only contain alpha-numeric characters, dashes, and underscores');
	return FALSE;
	}

	// --------------------------------------------------------------------

	// Validate the product name. It can only be alpha-numeric, dashes, underscores, colons or periods.
	// Note: These can be user-specified by setting the $this->product_name_rules variable.
	if ( ! preg_match("/^[".$this->product_name_rules."]+$/i", $items['name']))
	{
	log_message('error', 'An invalid name was submitted as the product name: '.$items['name'].' The name can only contain alpha-numeric characters, dashes, underscores, colons, and spaces');
	return FALSE;
	}

	// --------------------------------------------------------------------

	// Prep the price. Remove anything that isn't a number or decimal point.
	$items['price'] = trim(preg_replace('/([^0-9\.])/i', '', $items['price']));
	// Trim any leading zeros
	$items['price'] = trim(preg_replace('/(^[0]+)/i', '', $items['price']));

	// Is the price a valid number?
	if ( ! is_numeric($items['price']))
	{
	log_message('error', 'An invalid price was submitted for product ID: '.$items['id']);
	return FALSE;
	}

	// --------------------------------------------------------------------

	// We now need to create a unique identifier for the item being inserted into the cart.
	// Every time something is added to the cart it is stored in the master cart array.
	// Each row in the cart array, however, must have a unique index that identifies not only
	// a particular product, but makes it possible to store identical products with different options.
	// For example, what if someone buys two identical t-shirts (same product ID), but in
	// different sizes? The product ID (and other attributes, like the name) will be identical for
	// both sizes because it's the same shirt. The only difference will be the size.
	// Internally, we need to treat identical submissions, but with different options, as a unique product.
	// Our solution is to convert the options array to a string and MD5 it along with the product ID.
	// This becomes the unique "row ID"
	if (isset($items['options']) AND count($items['options']) > 0)
	{
	$rowid = md5($items['id'].implode('', $items['options']));
	}
	else
	{
	// No options were submitted so we simply MD5 the product ID.
	// Technically, we don't need to MD5 the ID in this case, but it makes
	// sense to standardize the format of array indexes for both conditions
	$rowid = md5($items['id']);
	}

	// --------------------------------------------------------------------

	// Now that we have our unique "row ID", we'll add our cart items to the master array

	// let's unset this first, just to make sure our index contains only the data from this submission
	unset($this->_cart_contents[$rowid]);

	// Create a new index with our new row ID
	$this->_cart_contents[$rowid]['rowid'] = $rowid;

	// And add the new items to the cart array
	foreach ($items as $key => $val)
	{
	$this->_cart_contents[$rowid][$key] = $val;
	}

	// Woot!
	return TRUE;
	}

	// --------------------------------------------------------------------

	/**
	* Update the cart
	*
	* This function permits the quantity of a given item to be changed.
	* Typically it is called from the "view cart" page if a user makes
	* changes to the quantity before checkout. That array must contain the
	* product ID and quantity for each item.
	*
	* @access public
	* @param array
	* @param string
	* @return bool
	*/
	function update($items = array())
	{
	// Was any cart data passed?
	if ( ! is_array($items) OR count($items) == 0)
	{
	return FALSE;
	}

	// You can either update a single product using a one-dimensional array,
	// or multiple products using a multi-dimensional one. The way we
	// determine the array type is by looking for a required array key named "id".
	// If it's not found we assume it's a multi-dimensional array
	$save_cart = FALSE;
	if (isset($items['rowid']) AND isset($items['qty']))
	{
	if ($this->_update($items) == TRUE)
	{
	$save_cart = TRUE;
	}
	}
	else
	{
	foreach ($items as $val)
	{
	if (is_array($val) AND isset($val['rowid']) AND isset($val['qty']))
	{
	if ($this->_update($val) == TRUE)
	{
	$save_cart = TRUE;
	}
	}
	}
	}

	// Save the cart data if the insert was successful
	if ($save_cart == TRUE)
	{
	$this->_save_cart();
	return TRUE;
	}

	return FALSE;
	}

	// --------------------------------------------------------------------

	/**
	* Update the cart
	*
	* This function permits the quantity of a given item to be changed.
	* Typically it is called from the "view cart" page if a user makes
	* changes to the quantity before checkout. That array must contain the
	* product ID and quantity for each item.
	*
	* @access private
	* @param array
	* @return bool
	*/
	function _update($items = array())
	{
	// Without these array indexes there is nothing we can do
	if ( ! isset($items['qty']) OR ! isset($items['rowid']) OR ! isset($this->_cart_contents[$items['rowid']]))
	{
	return FALSE;
	}

	// Prep the quantity
	$items['qty'] = preg_replace('/([^0-9])/i', '', $items['qty']);

	// Is the quantity a number?
	if ( ! is_numeric($items['qty']))
	{
	return FALSE;
	}

	// Is the new quantity different than what is already saved in the cart?
	// If it's the same there's nothing to do
	if ($this->_cart_contents[$items['rowid']]['qty'] == $items['qty'])
	{
	return FALSE;
	}

	// Is the quantity zero? If so we will remove the item from the cart.
	// If the quantity is greater than zero we are updating
	if ($items['qty'] == 0)
	{
	unset($this->_cart_contents[$items['rowid']]);
	}
	else
	{
	$this->_cart_contents[$items['rowid']]['qty'] = $items['qty'];
	}

	return TRUE;
	}

	// --------------------------------------------------------------------

	/**
	* Save the cart array to the session DB
	*
	* @access private
	* @return bool
	*/
	function _save_cart()
	{
	// Unset these so our total can be calculated correctly below
	unset($this->_cart_contents['total_items']);
	unset($this->_cart_contents['cart_total']);

	// Lets add up the individual prices and set the cart sub-total
	$total = 0;
	foreach ($this->_cart_contents as $key => $val)
	{
	// We make sure the array contains the proper indexes
	if ( ! is_array($val) OR ! isset($val['price']) OR ! isset($val['qty']))
	{
	continue;
	}

	$total += ($val['price'] * $val['qty']);

	// Set the subtotal
	$this->_cart_contents[$key]['subtotal'] = ($this->_cart_contents[$key]['price'] * $this->_cart_contents[$key]['qty']);
	}

	// Set the cart total and total items.
	$this->_cart_contents['total_items'] = count($this->_cart_contents);
	$this->_cart_contents['cart_total'] = $total;

	// Is our cart empty? If so we delete it from the session
	if (count($this->_cart_contents) <= 2)
	{
	$this->CI->session->unset_userdata('cart_contents');

	// Nothing more to do... coffee time!
	return FALSE;
	}

	// If we made it this far it means that our cart has data.
	// Let's pass it to the Session class so it can be stored
	$this->CI->session->set_userdata(array('cart_contents' => $this->_cart_contents));

	// Woot!
	return TRUE;
	}

	// --------------------------------------------------------------------

	/**
	* Cart Total
	*
	* @access public
	* @return integer
	*/
	function total()
	{
	return $this->_cart_contents['cart_total'];
	}

	// --------------------------------------------------------------------

	/**
	* Total Items
	*
	* Returns the total item count
	*
	* @access public
	* @return integer
	*/
	function total_items()
	{
	return $this->_cart_contents['total_items'];
	}

	// --------------------------------------------------------------------

	/**
	* Cart Contents
	*
	* Returns the entire cart array
	*
	* @access public
	* @return array
	*/
	function contents()
	{
	$cart = $this->_cart_contents;

	// Remove these so they don't create a problem when showing the cart table
	unset($cart['total_items']);
	unset($cart['cart_total']);

	return $cart;
	}

	// --------------------------------------------------------------------

	/**
	* Has options
	*
	* Returns TRUE if the rowid passed to this function correlates to an item
	* that has options associated with it.
	*
	* @access public
	* @return array
	*/
	function has_options($rowid = '')
	{
	if ( ! isset($this->_cart_contents[$rowid]['options']) OR count($this->_cart_contents[$rowid]['options']) === 0)
	{
	return FALSE;
	}

	return TRUE;
	}

	// --------------------------------------------------------------------

	/**
	* Product options
	*
	* Returns the an array of options, for a particular product row ID
	*
	* @access public
	* @return array
	*/
	function product_options($rowid = '')
	{
	if ( ! isset($this->_cart_contents[$rowid]['options']))
	{
	return array();
	}

	return $this->_cart_contents[$rowid]['options'];
	}

	// --------------------------------------------------------------------

	/**
	* Format Number
	*
	* Returns the supplied number with commas and a decimal point.
	*
	* @access public
	* @return integer
	*/
	function format_number($n = '')
	{
	if ($n == '')
	{
	return '';
	}

	// Remove anything that isn't a number or decimal point.
	$n = trim(preg_replace('/([^0-9\.])/i', '', $n));

	return number_format($n, 2, '.', ',');
	}

	// --------------------------------------------------------------------

	/**
	* Destroy the cart
	*
	* Empties the cart and kills the session
	*
	* @access public
	* @return null
	*/
	function destroy()
	{
	unset($this->_cart_contents);

	$this->_cart_contents['cart_total'] = 0;
	$this->_cart_contents['total_items'] = 0;

	$this->CI->session->unset_userdata('cart_contents');
	}


	}
	// END Cart Class

	/* End of file Cart.php */
	/* Location: ./system/libraries/Cart.php */