[289] | 1 | <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); |
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| 2 | /** |
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| 3 | * CodeIgniter |
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| 4 | * |
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| 5 | * An open source application development framework for PHP 5.1.6 or newer |
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| 6 | * |
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| 7 | * @package CodeIgniter |
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| 8 | * @author ExpressionEngine Dev Team |
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| 9 | * @copyright Copyright (c) 2006 - 2012, EllisLab, Inc. |
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| 10 | * @license http://codeigniter.com/user_guide/license.html |
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| 11 | * @link http://codeigniter.com |
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| 12 | * @since Version 1.0 |
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| 13 | * @filesource |
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| 14 | */ |
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| 15 | |
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| 16 | // ------------------------------------------------------------------------ |
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| 17 | |
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| 18 | /** |
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| 19 | * Shopping Cart Class |
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| 20 | * |
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| 21 | * @package CodeIgniter |
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| 22 | * @subpackage Libraries |
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| 23 | * @category Shopping Cart |
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| 24 | * @author ExpressionEngine Dev Team |
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| 25 | * @link http://codeigniter.com/user_guide/libraries/cart.html |
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| 26 | */ |
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| 27 | class CI_Cart { |
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| 28 | |
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| 29 | // These are the regular expression rules that we use to validate the product ID and product name |
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| 30 | var $product_id_rules = '\.a-z0-9_-'; // alpha-numeric, dashes, underscores, or periods |
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| 31 | var $product_name_rules = '\.\:\-_ a-z0-9'; // alpha-numeric, dashes, underscores, colons or periods |
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| 32 | |
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| 33 | // Private variables. Do not change! |
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| 34 | var $CI; |
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| 35 | var $_cart_contents = array(); |
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| 36 | |
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| 37 | |
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| 38 | /** |
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| 39 | * Shopping Class Constructor |
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| 40 | * |
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| 41 | * The constructor loads the Session class, used to store the shopping cart contents. |
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| 42 | */ |
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| 43 | public function __construct($params = array()) |
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| 44 | { |
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| 45 | // Set the super object to a local variable for use later |
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| 46 | $this->CI =& get_instance(); |
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| 47 | |
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| 48 | // Are any config settings being passed manually? If so, set them |
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| 49 | $config = array(); |
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| 50 | if (count($params) > 0) |
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| 51 | { |
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| 52 | foreach ($params as $key => $val) |
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| 53 | { |
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| 54 | $config[$key] = $val; |
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| 55 | } |
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| 56 | } |
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| 57 | |
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| 58 | // Load the Sessions class |
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| 59 | $this->CI->load->library('session', $config); |
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| 60 | |
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| 61 | // Grab the shopping cart array from the session table, if it exists |
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| 62 | if ($this->CI->session->userdata('cart_contents') !== FALSE) |
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| 63 | { |
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| 64 | $this->_cart_contents = $this->CI->session->userdata('cart_contents'); |
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| 65 | } |
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| 66 | else |
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| 67 | { |
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| 68 | // No cart exists so we'll set some base values |
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| 69 | $this->_cart_contents['cart_total'] = 0; |
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| 70 | $this->_cart_contents['total_items'] = 0; |
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| 71 | } |
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| 72 | |
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| 73 | log_message('debug', "Cart Class Initialized"); |
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| 74 | } |
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| 75 | |
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| 76 | // -------------------------------------------------------------------- |
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| 77 | |
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| 78 | /** |
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| 79 | * Insert items into the cart and save it to the session table |
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| 80 | * |
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| 81 | * @access public |
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| 82 | * @param array |
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| 83 | * @return bool |
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| 84 | */ |
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| 85 | function insert($items = array()) |
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| 86 | { |
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| 87 | // Was any cart data passed? No? Bah... |
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| 88 | if ( ! is_array($items) OR count($items) == 0) |
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| 89 | { |
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| 90 | log_message('error', 'The insert method must be passed an array containing data.'); |
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| 91 | return FALSE; |
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| 92 | } |
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| 93 | |
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| 94 | // You can either insert a single product using a one-dimensional array, |
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| 95 | // or multiple products using a multi-dimensional one. The way we |
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| 96 | // determine the array type is by looking for a required array key named "id" |
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| 97 | // at the top level. If it's not found, we will assume it's a multi-dimensional array. |
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| 98 | |
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| 99 | $save_cart = FALSE; |
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| 100 | if (isset($items['id'])) |
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| 101 | { |
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| 102 | if (($rowid = $this->_insert($items))) |
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| 103 | { |
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| 104 | $save_cart = TRUE; |
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| 105 | } |
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| 106 | } |
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| 107 | else |
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| 108 | { |
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| 109 | foreach ($items as $val) |
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| 110 | { |
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| 111 | if (is_array($val) AND isset($val['id'])) |
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| 112 | { |
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| 113 | if ($this->_insert($val)) |
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| 114 | { |
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| 115 | $save_cart = TRUE; |
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| 116 | } |
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| 117 | } |
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| 118 | } |
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| 119 | } |
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| 120 | |
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| 121 | // Save the cart data if the insert was successful |
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| 122 | if ($save_cart == TRUE) |
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| 123 | { |
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| 124 | $this->_save_cart(); |
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| 125 | return isset($rowid) ? $rowid : TRUE; |
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| 126 | } |
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| 127 | |
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| 128 | return FALSE; |
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| 129 | } |
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| 130 | |
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| 131 | // -------------------------------------------------------------------- |
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| 132 | |
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| 133 | /** |
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| 134 | * Insert |
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| 135 | * |
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| 136 | * @access private |
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| 137 | * @param array |
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| 138 | * @return bool |
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| 139 | */ |
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| 140 | function _insert($items = array()) |
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| 141 | { |
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| 142 | // Was any cart data passed? No? Bah... |
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| 143 | if ( ! is_array($items) OR count($items) == 0) |
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| 144 | { |
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| 145 | log_message('error', 'The insert method must be passed an array containing data.'); |
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| 146 | return FALSE; |
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| 147 | } |
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| 148 | |
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| 149 | // -------------------------------------------------------------------- |
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| 150 | |
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| 151 | // Does the $items array contain an id, quantity, price, and name? These are required |
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| 152 | if ( ! isset($items['id']) OR ! isset($items['qty']) OR ! isset($items['price']) OR ! isset($items['name'])) |
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| 153 | { |
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| 154 | log_message('error', 'The cart array must contain a product ID, quantity, price, and name.'); |
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| 155 | return FALSE; |
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| 156 | } |
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| 157 | |
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| 158 | // -------------------------------------------------------------------- |
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| 159 | |
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| 160 | // Prep the quantity. It can only be a number. Duh... |
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| 161 | $items['qty'] = trim(preg_replace('/([^0-9])/i', '', $items['qty'])); |
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| 162 | // Trim any leading zeros |
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| 163 | $items['qty'] = trim(preg_replace('/(^[0]+)/i', '', $items['qty'])); |
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| 164 | |
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| 165 | // If the quantity is zero or blank there's nothing for us to do |
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| 166 | if ( ! is_numeric($items['qty']) OR $items['qty'] == 0) |
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| 167 | { |
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| 168 | return FALSE; |
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| 169 | } |
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| 170 | |
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| 171 | // -------------------------------------------------------------------- |
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| 172 | |
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| 173 | // Validate the product ID. It can only be alpha-numeric, dashes, underscores or periods |
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| 174 | // Not totally sure we should impose this rule, but it seems prudent to standardize IDs. |
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| 175 | // Note: These can be user-specified by setting the $this->product_id_rules variable. |
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| 176 | if ( ! preg_match("/^[".$this->product_id_rules."]+$/i", $items['id'])) |
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| 177 | { |
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| 178 | log_message('error', 'Invalid product ID. The product ID can only contain alpha-numeric characters, dashes, and underscores'); |
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| 179 | return FALSE; |
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| 180 | } |
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| 181 | |
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| 182 | // -------------------------------------------------------------------- |
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| 183 | |
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| 184 | // Validate the product name. It can only be alpha-numeric, dashes, underscores, colons or periods. |
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| 185 | // Note: These can be user-specified by setting the $this->product_name_rules variable. |
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| 186 | if ( ! preg_match("/^[".$this->product_name_rules."]+$/i", $items['name'])) |
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| 187 | { |
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| 188 | log_message('error', 'An invalid name was submitted as the product name: '.$items['name'].' The name can only contain alpha-numeric characters, dashes, underscores, colons, and spaces'); |
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| 189 | return FALSE; |
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| 190 | } |
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| 191 | |
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| 192 | // -------------------------------------------------------------------- |
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| 193 | |
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| 194 | // Prep the price. Remove anything that isn't a number or decimal point. |
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| 195 | $items['price'] = trim(preg_replace('/([^0-9\.])/i', '', $items['price'])); |
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| 196 | // Trim any leading zeros |
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| 197 | $items['price'] = trim(preg_replace('/(^[0]+)/i', '', $items['price'])); |
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| 198 | |
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| 199 | // Is the price a valid number? |
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| 200 | if ( ! is_numeric($items['price'])) |
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| 201 | { |
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| 202 | log_message('error', 'An invalid price was submitted for product ID: '.$items['id']); |
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| 203 | return FALSE; |
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| 204 | } |
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| 205 | |
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| 206 | // -------------------------------------------------------------------- |
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| 207 | |
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| 208 | // We now need to create a unique identifier for the item being inserted into the cart. |
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| 209 | // Every time something is added to the cart it is stored in the master cart array. |
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| 210 | // Each row in the cart array, however, must have a unique index that identifies not only |
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| 211 | // a particular product, but makes it possible to store identical products with different options. |
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| 212 | // For example, what if someone buys two identical t-shirts (same product ID), but in |
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| 213 | // different sizes? The product ID (and other attributes, like the name) will be identical for |
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| 214 | // both sizes because it's the same shirt. The only difference will be the size. |
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| 215 | // Internally, we need to treat identical submissions, but with different options, as a unique product. |
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| 216 | // Our solution is to convert the options array to a string and MD5 it along with the product ID. |
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| 217 | // This becomes the unique "row ID" |
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| 218 | if (isset($items['options']) AND count($items['options']) > 0) |
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| 219 | { |
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| 220 | $rowid = md5($items['id'].implode('', $items['options'])); |
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| 221 | } |
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| 222 | else |
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| 223 | { |
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| 224 | // No options were submitted so we simply MD5 the product ID. |
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| 225 | // Technically, we don't need to MD5 the ID in this case, but it makes |
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| 226 | // sense to standardize the format of array indexes for both conditions |
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| 227 | $rowid = md5($items['id']); |
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| 228 | } |
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| 229 | |
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| 230 | // -------------------------------------------------------------------- |
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| 231 | |
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| 232 | // Now that we have our unique "row ID", we'll add our cart items to the master array |
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| 233 | |
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| 234 | // let's unset this first, just to make sure our index contains only the data from this submission |
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| 235 | unset($this->_cart_contents[$rowid]); |
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| 236 | |
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| 237 | // Create a new index with our new row ID |
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| 238 | $this->_cart_contents[$rowid]['rowid'] = $rowid; |
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| 239 | |
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| 240 | // And add the new items to the cart array |
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| 241 | foreach ($items as $key => $val) |
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| 242 | { |
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| 243 | $this->_cart_contents[$rowid][$key] = $val; |
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| 244 | } |
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| 245 | |
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| 246 | // Woot! |
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| 247 | return $rowid; |
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| 248 | } |
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| 249 | |
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| 250 | // -------------------------------------------------------------------- |
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| 251 | |
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| 252 | /** |
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| 253 | * Update the cart |
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| 254 | * |
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| 255 | * This function permits the quantity of a given item to be changed. |
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| 256 | * Typically it is called from the "view cart" page if a user makes |
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| 257 | * changes to the quantity before checkout. That array must contain the |
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| 258 | * product ID and quantity for each item. |
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| 259 | * |
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| 260 | * @access public |
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| 261 | * @param array |
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| 262 | * @param string |
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| 263 | * @return bool |
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| 264 | */ |
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| 265 | function update($items = array()) |
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| 266 | { |
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| 267 | // Was any cart data passed? |
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| 268 | if ( ! is_array($items) OR count($items) == 0) |
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| 269 | { |
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| 270 | return FALSE; |
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| 271 | } |
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| 272 | |
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| 273 | // You can either update a single product using a one-dimensional array, |
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| 274 | // or multiple products using a multi-dimensional one. The way we |
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| 275 | // determine the array type is by looking for a required array key named "id". |
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| 276 | // If it's not found we assume it's a multi-dimensional array |
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| 277 | $save_cart = FALSE; |
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| 278 | if (isset($items['rowid']) AND isset($items['qty'])) |
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| 279 | { |
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| 280 | if ($this->_update($items) == TRUE) |
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| 281 | { |
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| 282 | $save_cart = TRUE; |
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| 283 | } |
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| 284 | } |
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| 285 | else |
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| 286 | { |
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| 287 | foreach ($items as $val) |
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| 288 | { |
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| 289 | if (is_array($val) AND isset($val['rowid']) AND isset($val['qty'])) |
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| 290 | { |
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| 291 | if ($this->_update($val) == TRUE) |
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| 292 | { |
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| 293 | $save_cart = TRUE; |
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| 294 | } |
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| 295 | } |
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| 296 | } |
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| 297 | } |
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| 298 | |
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| 299 | // Save the cart data if the insert was successful |
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| 300 | if ($save_cart == TRUE) |
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| 301 | { |
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| 302 | $this->_save_cart(); |
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| 303 | return TRUE; |
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| 304 | } |
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| 305 | |
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| 306 | return FALSE; |
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| 307 | } |
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| 308 | |
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| 309 | // -------------------------------------------------------------------- |
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| 310 | |
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| 311 | /** |
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| 312 | * Update the cart |
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| 313 | * |
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| 314 | * This function permits the quantity of a given item to be changed. |
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| 315 | * Typically it is called from the "view cart" page if a user makes |
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| 316 | * changes to the quantity before checkout. That array must contain the |
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| 317 | * product ID and quantity for each item. |
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| 318 | * |
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| 319 | * @access private |
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| 320 | * @param array |
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| 321 | * @return bool |
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| 322 | */ |
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| 323 | function _update($items = array()) |
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| 324 | { |
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| 325 | // Without these array indexes there is nothing we can do |
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| 326 | if ( ! isset($items['qty']) OR ! isset($items['rowid']) OR ! isset($this->_cart_contents[$items['rowid']])) |
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| 327 | { |
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| 328 | return FALSE; |
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| 329 | } |
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| 330 | |
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| 331 | // Prep the quantity |
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| 332 | $items['qty'] = preg_replace('/([^0-9])/i', '', $items['qty']); |
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| 333 | |
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| 334 | // Is the quantity a number? |
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| 335 | if ( ! is_numeric($items['qty'])) |
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| 336 | { |
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| 337 | return FALSE; |
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| 338 | } |
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| 339 | |
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| 340 | // Is the new quantity different than what is already saved in the cart? |
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| 341 | // If it's the same there's nothing to do |
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| 342 | if ($this->_cart_contents[$items['rowid']]['qty'] == $items['qty']) |
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| 343 | { |
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| 344 | return FALSE; |
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| 345 | } |
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| 346 | |
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| 347 | // Is the quantity zero? If so we will remove the item from the cart. |
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| 348 | // If the quantity is greater than zero we are updating |
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| 349 | if ($items['qty'] == 0) |
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| 350 | { |
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| 351 | unset($this->_cart_contents[$items['rowid']]); |
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| 352 | } |
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| 353 | else |
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| 354 | { |
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| 355 | $this->_cart_contents[$items['rowid']]['qty'] = $items['qty']; |
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| 356 | } |
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| 357 | |
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| 358 | return TRUE; |
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| 359 | } |
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| 360 | |
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| 361 | // -------------------------------------------------------------------- |
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| 362 | |
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| 363 | /** |
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| 364 | * Save the cart array to the session DB |
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| 365 | * |
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| 366 | * @access private |
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| 367 | * @return bool |
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| 368 | */ |
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| 369 | function _save_cart() |
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| 370 | { |
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| 371 | // Unset these so our total can be calculated correctly below |
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| 372 | unset($this->_cart_contents['total_items']); |
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| 373 | unset($this->_cart_contents['cart_total']); |
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| 374 | |
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| 375 | // Lets add up the individual prices and set the cart sub-total |
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| 376 | $total = 0; |
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| 377 | $items = 0; |
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| 378 | foreach ($this->_cart_contents as $key => $val) |
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| 379 | { |
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| 380 | // We make sure the array contains the proper indexes |
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| 381 | if ( ! is_array($val) OR ! isset($val['price']) OR ! isset($val['qty'])) |
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| 382 | { |
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| 383 | continue; |
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| 384 | } |
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| 385 | |
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| 386 | $total += ($val['price'] * $val['qty']); |
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| 387 | $items += $val['qty']; |
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| 388 | |
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| 389 | // Set the subtotal |
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| 390 | $this->_cart_contents[$key]['subtotal'] = ($this->_cart_contents[$key]['price'] * $this->_cart_contents[$key]['qty']); |
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| 391 | } |
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| 392 | |
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| 393 | // Set the cart total and total items. |
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| 394 | $this->_cart_contents['total_items'] = $items; |
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| 395 | $this->_cart_contents['cart_total'] = $total; |
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| 396 | |
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| 397 | // Is our cart empty? If so we delete it from the session |
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| 398 | if (count($this->_cart_contents) <= 2) |
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| 399 | { |
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| 400 | $this->CI->session->unset_userdata('cart_contents'); |
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| 401 | |
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| 402 | // Nothing more to do... coffee time! |
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| 403 | return FALSE; |
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| 404 | } |
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| 405 | |
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| 406 | // If we made it this far it means that our cart has data. |
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| 407 | // Let's pass it to the Session class so it can be stored |
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| 408 | $this->CI->session->set_userdata(array('cart_contents' => $this->_cart_contents)); |
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| 409 | |
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| 410 | // Woot! |
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| 411 | return TRUE; |
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| 412 | } |
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| 413 | |
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| 414 | // -------------------------------------------------------------------- |
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| 415 | |
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| 416 | /** |
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| 417 | * Cart Total |
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| 418 | * |
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| 419 | * @access public |
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| 420 | * @return integer |
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| 421 | */ |
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| 422 | function total() |
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| 423 | { |
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| 424 | return $this->_cart_contents['cart_total']; |
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| 425 | } |
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| 426 | |
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| 427 | // -------------------------------------------------------------------- |
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| 428 | |
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| 429 | /** |
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| 430 | * Total Items |
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| 431 | * |
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| 432 | * Returns the total item count |
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| 433 | * |
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| 434 | * @access public |
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| 435 | * @return integer |
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| 436 | */ |
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| 437 | function total_items() |
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| 438 | { |
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| 439 | return $this->_cart_contents['total_items']; |
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| 440 | } |
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| 441 | |
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| 442 | // -------------------------------------------------------------------- |
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| 443 | |
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| 444 | /** |
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| 445 | * Cart Contents |
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| 446 | * |
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| 447 | * Returns the entire cart array |
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| 448 | * |
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| 449 | * @access public |
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| 450 | * @return array |
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| 451 | */ |
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| 452 | function contents() |
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| 453 | { |
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| 454 | $cart = $this->_cart_contents; |
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| 455 | |
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| 456 | // Remove these so they don't create a problem when showing the cart table |
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| 457 | unset($cart['total_items']); |
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| 458 | unset($cart['cart_total']); |
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| 459 | |
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| 460 | return $cart; |
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| 461 | } |
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| 462 | |
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| 463 | // -------------------------------------------------------------------- |
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| 464 | |
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| 465 | /** |
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| 466 | * Has options |
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| 467 | * |
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| 468 | * Returns TRUE if the rowid passed to this function correlates to an item |
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| 469 | * that has options associated with it. |
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| 470 | * |
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| 471 | * @access public |
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| 472 | * @return array |
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| 473 | */ |
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| 474 | function has_options($rowid = '') |
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| 475 | { |
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| 476 | if ( ! isset($this->_cart_contents[$rowid]['options']) OR count($this->_cart_contents[$rowid]['options']) === 0) |
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| 477 | { |
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| 478 | return FALSE; |
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| 479 | } |
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| 480 | |
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| 481 | return TRUE; |
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| 482 | } |
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| 483 | |
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| 484 | // -------------------------------------------------------------------- |
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| 485 | |
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| 486 | /** |
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| 487 | * Product options |
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| 488 | * |
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| 489 | * Returns the an array of options, for a particular product row ID |
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| 490 | * |
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| 491 | * @access public |
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| 492 | * @return array |
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| 493 | */ |
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| 494 | function product_options($rowid = '') |
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| 495 | { |
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| 496 | if ( ! isset($this->_cart_contents[$rowid]['options'])) |
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| 497 | { |
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| 498 | return array(); |
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| 499 | } |
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| 500 | |
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| 501 | return $this->_cart_contents[$rowid]['options']; |
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| 502 | } |
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| 503 | |
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| 504 | // -------------------------------------------------------------------- |
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| 505 | |
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| 506 | /** |
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| 507 | * Format Number |
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| 508 | * |
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| 509 | * Returns the supplied number with commas and a decimal point. |
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| 510 | * |
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| 511 | * @access public |
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| 512 | * @return integer |
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| 513 | */ |
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| 514 | function format_number($n = '') |
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| 515 | { |
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| 516 | if ($n == '') |
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| 517 | { |
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| 518 | return ''; |
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| 519 | } |
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| 520 | |
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| 521 | // Remove anything that isn't a number or decimal point. |
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| 522 | $n = trim(preg_replace('/([^0-9\.])/i', '', $n)); |
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| 523 | |
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| 524 | return number_format($n, 2, '.', ','); |
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| 525 | } |
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| 526 | |
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| 527 | // -------------------------------------------------------------------- |
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| 528 | |
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| 529 | /** |
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| 530 | * Destroy the cart |
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| 531 | * |
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| 532 | * Empties the cart and kills the session |
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| 533 | * |
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| 534 | * @access public |
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| 535 | * @return null |
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| 536 | */ |
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| 537 | function destroy() |
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| 538 | { |
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| 539 | unset($this->_cart_contents); |
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| 540 | |
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| 541 | $this->_cart_contents['cart_total'] = 0; |
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| 542 | $this->_cart_contents['total_items'] = 0; |
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| 543 | |
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| 544 | $this->CI->session->unset_userdata('cart_contents'); |
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| 545 | } |
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| 546 | |
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| 547 | |
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| 548 | } |
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| 549 | // END Cart Class |
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| 550 | |
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| 551 | /* End of file Cart.php */ |
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| 552 | /* Location: ./system/libraries/Cart.php */ |
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