<?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 - 2012, 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 (($rowid = $this->_insert($items)))
|
{
|
$save_cart = TRUE;
|
}
|
}
|
else
|
{
|
foreach ($items as $val)
|
{
|
if (is_array($val) AND isset($val['id']))
|
{
|
if ($this->_insert($val))
|
{
|
$save_cart = TRUE;
|
}
|
}
|
}
|
}
|
|
// Save the cart data if the insert was successful
|
if ($save_cart == TRUE)
|
{
|
$this->_save_cart();
|
return isset($rowid) ? $rowid : TRUE;
|
}
|
|
return FALSE;
|
}
|
|
// --------------------------------------------------------------------
|
|
/**
|
* Insert
|
*
|
* @access private
|
* @param array
|
* @return bool
|
*/
|
function _insert($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 $rowid;
|
}
|
|
// --------------------------------------------------------------------
|
|
/**
|
* Update the cart
|
*
|
* This function permits the quantity of a given item to be changed.
|
* Typically it is called from the "view cart" page if a user makes
|
* changes to the quantity before checkout. That array must contain the
|
* product ID and quantity for each item.
|
*
|
* @access public
|
* @param array
|
* @param string
|
* @return bool
|
*/
|
function update($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;
|
$items = 0;
|
foreach ($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']);
|
$items += $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'] = $items;
|
$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 */
|
