[z_archive/KronOS.git] / 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 - 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 */
Commit	Line	Data
59c06b17 CS	1	<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
	2	/**
	3	* CodeIgniter
	4	*
	5	* An open source application development framework for PHP 5.1.6 or newer
	6	*
	7	* @package CodeIgniter
	8	* @author ExpressionEngine Dev Team
	9	* @copyright Copyright (c) 2006 - 2012, EllisLab, Inc.
	10	* @license http://codeigniter.com/user_guide/license.html
	11	* @link http://codeigniter.com
	12	* @since Version 1.0
	13	* @filesource
	14	*/
	15
	16	// ------------------------------------------------------------------------
	17
	18	/**
	19	* Shopping Cart Class
	20	*
	21	* @package CodeIgniter
	22	* @subpackage Libraries
	23	* @category Shopping Cart
	24	* @author ExpressionEngine Dev Team
	25	* @link http://codeigniter.com/user_guide/libraries/cart.html
	26	*/
	27	class CI_Cart {
	28
	29	// These are the regular expression rules that we use to validate the product ID and product name
	30	var $product_id_rules = '\.a-z0-9_-'; // alpha-numeric, dashes, underscores, or periods
	31	var $product_name_rules = '\.\:\-_ a-z0-9'; // alpha-numeric, dashes, underscores, colons or periods
	32
	33	// Private variables. Do not change!
	34	var $CI;
	35	var $_cart_contents = array();
	36
	37
	38	/**
	39	* Shopping Class Constructor
	40	*
	41	* The constructor loads the Session class, used to store the shopping cart contents.
	42	*/
	43	public function __construct($params = array())
	44	{
	45	// Set the super object to a local variable for use later
	46	$this->CI =& get_instance();
	47
	48	// Are any config settings being passed manually? If so, set them
	49	$config = array();
	50	if (count($params) > 0)
	51	{
	52	foreach ($params as $key => $val)
	53	{
	54	$config[$key] = $val;
	55	}
	56	}
	57
	58	// Load the Sessions class
	59	$this->CI->load->library('session', $config);
	60
	61	// Grab the shopping cart array from the session table, if it exists
	62	if ($this->CI->session->userdata('cart_contents') !== FALSE)
	63	{
	64	$this->_cart_contents = $this->CI->session->userdata('cart_contents');
65	}
66	else
67	{
68	// No cart exists so we'll set some base values
69	$this->_cart_contents['cart_total'] = 0;
70	$this->_cart_contents['total_items'] = 0;
71	}
72
73	log_message('debug', "Cart Class Initialized");
74	}
75
76	// --------------------------------------------------------------------
77
78	/**
79	* Insert items into the cart and save it to the session table
80	*
81	* @access public
82	* @param array
83	* @return bool
84	*/
85	function insert($items = array())
86	{
87	// Was any cart data passed? No? Bah...
88	if ( ! is_array($items) OR count($items) == 0)
89	{
90	log_message('error', 'The insert method must be passed an array containing data.');
91	return FALSE;
92	}
93
94	// You can either insert a single product using a one-dimensional array,
95	// or multiple products using a multi-dimensional one. The way we
96	// determine the array type is by looking for a required array key named "id"
97	// at the top level. If it's not found, we will assume it's a multi-dimensional array.
98
99	$save_cart = FALSE;
100	if (isset($items['id']))
101	{
102	if (($rowid = $this->_insert($items)))
103	{
104	$save_cart = TRUE;
105	}
106	}
107	else
108	{
109	foreach ($items as $val)
110	{
111	if (is_array($val) AND isset($val['id']))
112	{
113	if ($this->_insert($val))
114	{
115	$save_cart = TRUE;
116	}
117	}
118	}
119	}
120
121	// Save the cart data if the insert was successful
122	if ($save_cart == TRUE)
123	{
124	$this->_save_cart();
125	return isset($rowid) ? $rowid : TRUE;
126	}
127
128	return FALSE;
129	}
130
131	// --------------------------------------------------------------------
132
133	/**
134	* Insert
135	*
136	* @access private
137	* @param array
138	* @return bool
139	*/
140	function _insert($items = array())
141	{
142	// Was any cart data passed? No? Bah...
143	if ( ! is_array($items) OR count($items) == 0)
144	{
145	log_message('error', 'The insert method must be passed an array containing data.');
146	return FALSE;
147	}
148
149	// --------------------------------------------------------------------
150
151	// Does the $items array contain an id, quantity, price, and name? These are required
152	if ( ! isset($items['id']) OR ! isset($items['qty']) OR ! isset($items['price']) OR ! isset($items['name']))
153	{
154	log_message('error', 'The cart array must contain a product ID, quantity, price, and name.');
155	return FALSE;
156	}
157
158	// --------------------------------------------------------------------
159
160	// Prep the quantity. It can only be a number. Duh...
161	$items['qty'] = trim(preg_replace('/([^0-9])/i', '', $items['qty']));
162	// Trim any leading zeros
163	$items['qty'] = trim(preg_replace('/(^[0]+)/i', '', $items['qty']));
164
165	// If the quantity is zero or blank there's nothing for us to do
166	if ( ! is_numeric($items['qty']) OR $items['qty'] == 0)
167	{
168	return FALSE;
169	}
170
171	// --------------------------------------------------------------------
172
173	// Validate the product ID. It can only be alpha-numeric, dashes, underscores or periods
174	// Not totally sure we should impose this rule, but it seems prudent to standardize IDs.
175	// Note: These can be user-specified by setting the $this->product_id_rules variable.
176	if ( ! preg_match("/^[".$this->product_id_rules."]+$/i", $items['id']))
177	{
178	log_message('error', 'Invalid product ID. The product ID can only contain alpha-numeric characters, dashes, and underscores');
179	return FALSE;
180	}
181
182	// --------------------------------------------------------------------
183
184	// Validate the product name. It can only be alpha-numeric, dashes, underscores, colons or periods.
185	// Note: These can be user-specified by setting the $this->product_name_rules variable.
186	if ( ! preg_match("/^[".$this->product_name_rules."]+$/i", $items['name']))
187	{
188	log_message('error', 'An invalid name was submitted as the product name: '.$items['name'].' The name can only contain alpha-numeric characters, dashes, underscores, colons, and spaces');
189	return FALSE;
190	}
191
192	// --------------------------------------------------------------------
193
194	// Prep the price. Remove anything that isn't a number or decimal point.
195	$items['price'] = trim(preg_replace('/([^0-9\.])/i', '', $items['price']));
196	// Trim any leading zeros
197	$items['price'] = trim(preg_replace('/(^[0]+)/i', '', $items['price']));
198
199	// Is the price a valid number?
200	if ( ! is_numeric($items['price']))
201	{
202	log_message('error', 'An invalid price was submitted for product ID: '.$items['id']);
203	return FALSE;
204	}
205
206	// --------------------------------------------------------------------
207
208	// We now need to create a unique identifier for the item being inserted into the cart.
209	// Every time something is added to the cart it is stored in the master cart array.
210	// Each row in the cart array, however, must have a unique index that identifies not only
211	// a particular product, but makes it possible to store identical products with different options.
212	// For example, what if someone buys two identical t-shirts (same product ID), but in
213	// different sizes? The product ID (and other attributes, like the name) will be identical for
214	// both sizes because it's the same shirt. The only difference will be the size.
215	// Internally, we need to treat identical submissions, but with different options, as a unique product.
216	// Our solution is to convert the options array to a string and MD5 it along with the product ID.
217	// This becomes the unique "row ID"
218	if (isset($items['options']) AND count($items['options']) > 0)
219	{
220	$rowid = md5($items['id'].implode('', $items['options']));
221	}
222	else
223	{
224	// No options were submitted so we simply MD5 the product ID.
225	// Technically, we don't need to MD5 the ID in this case, but it makes
226	// sense to standardize the format of array indexes for both conditions
227	$rowid = md5($items['id']);
228	}
229
230	// --------------------------------------------------------------------
231
232	// Now that we have our unique "row ID", we'll add our cart items to the master array
233
234	// let's unset this first, just to make sure our index contains only the data from this submission
235	unset($this->_cart_contents[$rowid]);
236
237	// Create a new index with our new row ID
238	$this->_cart_contents[$rowid]['rowid'] = $rowid;
239
240	// And add the new items to the cart array
241	foreach ($items as $key => $val)
242	{
243	$this->_cart_contents[$rowid][$key] = $val;
244	}
245
246	// Woot!
247	return $rowid;
248	}
249
250	// --------------------------------------------------------------------
251
252	/**
253	* Update the cart
254	*
255	* This function permits the quantity of a given item to be changed.
256	* Typically it is called from the "view cart" page if a user makes
257	* changes to the quantity before checkout. That array must contain the
258	* product ID and quantity for each item.
259	*
260	* @access public
261	* @param array
262	* @param string
263	* @return bool
264	*/
265	function update($items = array())
266	{
267	// Was any cart data passed?
268	if ( ! is_array($items) OR count($items) == 0)
269	{
270	return FALSE;
271	}
272
273	// You can either update a single product using a one-dimensional array,
274	// or multiple products using a multi-dimensional one. The way we
275	// determine the array type is by looking for a required array key named "id".
276	// If it's not found we assume it's a multi-dimensional array
277	$save_cart = FALSE;
278	if (isset($items['rowid']) AND isset($items['qty']))
279	{
280	if ($this->_update($items) == TRUE)
281	{
282	$save_cart = TRUE;
283	}
284	}
285	else
286	{
287	foreach ($items as $val)
288	{
289	if (is_array($val) AND isset($val['rowid']) AND isset($val['qty']))
290	{
291	if ($this->_update($val) == TRUE)
292	{
293	$save_cart = TRUE;
294	}
295	}
296	}
297	}
298
299	// Save the cart data if the insert was successful
300	if ($save_cart == TRUE)
301	{
302	$this->_save_cart();
303	return TRUE;
304	}
305
306	return FALSE;
307	}
308
309	// --------------------------------------------------------------------
310
311	/**
312	* Update the cart
313	*
314	* This function permits the quantity of a given item to be changed.
315	* Typically it is called from the "view cart" page if a user makes
316	* changes to the quantity before checkout. That array must contain the
317	* product ID and quantity for each item.
318	*
319	* @access private
320	* @param array
321	* @return bool
322	*/
323	function _update($items = array())
324	{
325	// Without these array indexes there is nothing we can do
326	if ( ! isset($items['qty']) OR ! isset($items['rowid']) OR ! isset($this->_cart_contents[$items['rowid']]))
327	{
328	return FALSE;
329	}
330
331	// Prep the quantity
332	$items['qty'] = preg_replace('/([^0-9])/i', '', $items['qty']);
333
334	// Is the quantity a number?
335	if ( ! is_numeric($items['qty']))
336	{
337	return FALSE;
338	}
339
340	// Is the new quantity different than what is already saved in the cart?
341	// If it's the same there's nothing to do
342	if ($this->_cart_contents[$items['rowid']]['qty'] == $items['qty'])
343	{
344	return FALSE;
345	}
346
347	// Is the quantity zero? If so we will remove the item from the cart.
348	// If the quantity is greater than zero we are updating
349	if ($items['qty'] == 0)
350	{
351	unset($this->_cart_contents[$items['rowid']]);
352	}
353	else
354	{
355	$this->_cart_contents[$items['rowid']]['qty'] = $items['qty'];
356	}
357
358	return TRUE;
359	}
360
361	// --------------------------------------------------------------------
362
363	/**
364	* Save the cart array to the session DB
365	*
366	* @access private
367	* @return bool
368	*/
369	function _save_cart()
370	{
371	// Unset these so our total can be calculated correctly below
372	unset($this->_cart_contents['total_items']);
373	unset($this->_cart_contents['cart_total']);
374
375	// Lets add up the individual prices and set the cart sub-total
376	$total = 0;
377	$items = 0;
378	foreach ($this->_cart_contents as $key => $val)
379	{
380	// We make sure the array contains the proper indexes
381	if ( ! is_array($val) OR ! isset($val['price']) OR ! isset($val['qty']))
382	{
383	continue;
384	}
385
386	$total += ($val['price'] * $val['qty']);
387	$items += $val['qty'];
388
389	// Set the subtotal
390	$this->_cart_contents[$key]['subtotal'] = ($this->_cart_contents[$key]['price'] * $this->_cart_contents[$key]['qty']);
391	}
392
393	// Set the cart total and total items.
394	$this->_cart_contents['total_items'] = $items;
395	$this->_cart_contents['cart_total'] = $total;
396
397	// Is our cart empty? If so we delete it from the session
398	if (count($this->_cart_contents) <= 2)
399	{
400	$this->CI->session->unset_userdata('cart_contents');
401
402	// Nothing more to do... coffee time!
403	return FALSE;
404	}
405
406	// If we made it this far it means that our cart has data.
407	// Let's pass it to the Session class so it can be stored
408	$this->CI->session->set_userdata(array('cart_contents' => $this->_cart_contents));
409
410	// Woot!
411	return TRUE;
412	}
413
414	// --------------------------------------------------------------------
415
416	/**
417	* Cart Total
418	*
419	* @access public
420	* @return integer
421	*/
422	function total()
423	{
424	return $this->_cart_contents['cart_total'];
425	}
426
427	// --------------------------------------------------------------------
428
429	/**
430	* Total Items
431	*
432	* Returns the total item count
433	*
434	* @access public
435	* @return integer
436	*/
437	function total_items()
438	{
439	return $this->_cart_contents['total_items'];
440	}
441
442	// --------------------------------------------------------------------
443
444	/**
445	* Cart Contents
446	*
447	* Returns the entire cart array
448	*
449	* @access public
450	* @return array
451	*/
452	function contents()
453	{
454	$cart = $this->_cart_contents;
455
456	// Remove these so they don't create a problem when showing the cart table
457	unset($cart['total_items']);
458	unset($cart['cart_total']);
459
460	return $cart;
461	}
462
463	// --------------------------------------------------------------------
464
465	/**
466	* Has options
467	*
468	* Returns TRUE if the rowid passed to this function correlates to an item
469	* that has options associated with it.
470	*
471	* @access public
472	* @return array
473	*/
474	function has_options($rowid = '')
475	{
476	if ( ! isset($this->_cart_contents[$rowid]['options']) OR count($this->_cart_contents[$rowid]['options']) === 0)
477	{
478	return FALSE;
479	}
480
481	return TRUE;
482	}
483
484	// --------------------------------------------------------------------
485
486	/**
487	* Product options
488	*
489	* Returns the an array of options, for a particular product row ID
490	*
491	* @access public
492	* @return array
493	*/
494	function product_options($rowid = '')
495	{
496	if ( ! isset($this->_cart_contents[$rowid]['options']))
497	{
498	return array();
499	}
500
501	return $this->_cart_contents[$rowid]['options'];
502	}
503
504	// --------------------------------------------------------------------
505
506	/**
507	* Format Number
508	*
509	* Returns the supplied number with commas and a decimal point.
510	*
511	* @access public
512	* @return integer
513	*/
514	function format_number($n = '')
515	{
516	if ($n == '')
517	{
518	return '';
519	}
520
521	// Remove anything that isn't a number or decimal point.
522	$n = trim(preg_replace('/([^0-9\.])/i', '', $n));
523
524	return number_format($n, 2, '.', ',');
525	}
526
527	// --------------------------------------------------------------------
528
529	/**
530	* Destroy the cart
531	*
532	* Empties the cart and kills the session
533	*
534	* @access public
535	* @return null
536	*/
537	function destroy()
538	{
539	unset($this->_cart_contents);
540
541	$this->_cart_contents['cart_total'] = 0;
542	$this->_cart_contents['total_items'] = 0;
543
544	$this->CI->session->unset_userdata('cart_contents');
545	}
546
547
548	}
549	// END Cart Class
550
551	/* End of file Cart.php */
552	/* Location: ./system/libraries/Cart.php */