<?php
/* ----------------------------------------------------------------------
 * PHP implementation of TPC-W
 * 
 * Copyright (c) 2004, Jan Wieck
 * 
 * Permission to use, copy, modify, and distribute this software and
 * its documentation for any purpose, without fee, and without a
 * written agreement is hereby granted, provided that the above
 * copyright notice and this paragraph and the following two
 * paragraphs appear in all copies.
 * 
 * IN NO EVENT SHALL THE AUTHORS BE LIABLE TO ANY PARTY FOR DIRECT,
 * INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
 * INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE
 * AND ITS DOCUMENTATION, EVEN IF THE AUTHORS HAVE BEEN ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * THE AUTHORS SPECIFICALLY DISCLAIM ANY WARRANTIES, INCLUDING, BUT
 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED
 * HEREUNDER IS ON AN "AS IS" BASIS, AND THE AUTHORS HAVE NO
 * OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
 * ENHANCEMENTS, OR MODIFICATIONS.
 *
 * shopping_cart.php -
 *
 * Shopping Cart Web Interaction according TPC-W v1.8 2.4
 * ----------------------------------------------------------------------
 */
	include('common.inc');

	// XXX This is effectively microcached, but it's not clear
	// that can be fixed in this case because of all the
	// intervening session junk.

	db_connect();
	db_start_transaction(true);

	if (isset($vars['ADD_FLAG']))
	{
		$add_flag = $vars['ADD_FLAG'];
	}
	else
	{
		$add_flag = "N";
	}

	/*
	 * Initialize an empty shopping cart if we don't have a shopping ID
	 */
	if (!isset($_SESSION['sc_shopping_id']))
	{
		$_SESSION['shopping_session'] = true;
		$_SESSION['sc_shopping_id']	= session_id();
		$_SESSION['sc_date_sec']	= time();
		$_SESSION['scl_i_id']		= array();
		$_SESSION['scl_qty']		= array();
		$_SESSION['scl_cost']		= array();
		$_SESSION['scl_srp']		= array();
		$_SESSION['scl_title']		= array();
		$_SESSION['scl_backing']	= array();

		session_register('shopping_session', 'sc_shopping_id', 
				'sc_date_sec', 'scl_i_id', 'scl_qty', 'scl_cost', 
				'scl_srp', 'scl_title', 'scl_backing');

		if (isset($_SESSION['c_id']))
		{
			if ($row = wrap('db_shop_cart_get_customer', $_SESSION['c_id']))
			{
				$_SESSION['c_fname'] = $row[0];
				$_SESSION['c_lname'] = $row[1];
				session_register('c_fname', 'c_lname');

				$_SESSION['sc_c_fname'] = $row[0];
				$_SESSION['sc_c_lname'] = $row[1];
				$_SESSION['sc_c_discount'] = $row[2];
				session_register('sc_c_fname', 'sc_c_lname', 'sc_c_discount');
			}
			else
			{
				tpcw_error("Customer ID " . $c_id . " is invalid");
			}
		}
	}

	/*
	 * Depending on the add_flag ...
	 */
	$cart_full = false;
	if ($add_flag == "Y")
	{
		if (sizeof($_SESSION['scl_i_id']) < 100)
		{
			/*
			 * We have an add_flag and the cart is not full yet
			 */
			$cart_full = 0;
			$i_id = $vars['I_ID'];
			$qty  = $vars['QTY'];

			/*
			 * Check if the item is already in the cart
			 */
			$key = array_search($i_id, $_SESSION['scl_i_id']);
			if ($key > 0 && $_SESSION['scl_i_id'][$key] == $i_id)
			{
				/*
				 * The item is already in the cart ... incease
				 * the quenity by one
				 */
				$_SESSION['scl_qty'][$key]++;
			}
			else
			{
				/*
				 * Item not in the cart ... lookup item data and
				 * add it with quantity 1
				 */
				$row = wrap('db_shop_cart_get_item', $i_id);
				if (!$row)
				{
					tpcw_error("Illegal item ID " . $i_id);
				}

				$_SESSION['scl_i_id'][]		= $i_id;
				$_SESSION['scl_qty'][]		= 1;
				$_SESSION['scl_cost'][]		= $row[0];
				$_SESSION['scl_srp'][]		= $row[1];
				$_SESSION['scl_title'][]	= $row[2];
				$_SESSION['scl_backing'][]	= $row[3];
			}

			$_SESSION['sc_date_sec'] = time();
		}
		else
		{
			$cart_full = true;
		}
	}
	else
	{
		/*
		 * add_flag not "Y" - get all updates/removes from the form
		 */
		$keys = array_keys($_SESSION['scl_i_id']);
		while (list($idx, $key) = each($keys))
		{
			$name_id = "I_ID_" . $key;
			$name_qty = "QTY_" . $key;
			if (isset($vars[$name_id]) &&
					$_SESSION['scl_i_id'][$key] == $vars[$name_id])
			{
				$qty = (integer)$vars[$name_qty];
				if ($qty == 0)
				{
					unset($_SESSION['scl_i_id'][$key]);
					unset($_SESSION['scl_qty'][$key]);
					unset($_SESSION['scl_cost'][$key]);
					unset($_SESSION['scl_srp'][$key]);
					unset($_SESSION['scl_title'][$key]);
					unset($_SESSION['scl_backing'][$key]);

				}
				else
				{
					$_SESSION['scl_qty'][$key] = $qty;
				}

				$_SESSION['sc_date_sec'] = time();
			}
		}

		/*
		 * If we have an empty shopping cart, add a promotional item
		 */
		if (sizeof($_SESSION['scl_i_id']) == 0)
		{
			$i_id = tpcw_rand(1, $num_items);

			$row = wrap('db_shop_cart_get_promitem', $i_id);
			if (!$row)
			{
				tpcw_error("Promotional item for " . $i_id . " not found");
			}

			$_SESSION['scl_i_id'][]		= $row[0];
			$_SESSION['scl_qty'][]		= 1;
			$_SESSION['scl_cost'][]		= $row[1];
			$_SESSION['scl_srp'][]		= $row[2];
			$_SESSION['scl_title'][]	= $row[3];
			$_SESSION['scl_backing'][]	= $row[4];

			$_SESSION['sc_date_sec'] = time();
		}
	}

	/*
	 * Generate the promotional item output
	 */
	$promotional = tpcw_promotional();

	db_commit_transaction();
	db_disconnect();
?>

<html>
<head>
  <title>TPC-W Shopping Cart</title>
  <?php include('tpcw_style.inc'); ?>
</head>

<body bgcolor="#ffffff">
  <center>
	<h1>TPC Web Commerce Benchmark (TPC-W)</h1>
	<a href="http://www.tpc.org/"><img border="0" src="<?= $image_pref ?>/tpclogo.gif"></a>
	<h2>Shopping Cart Page</h2>

	<?php 
		echo $promotional;

		if ($cart_full)
		{
			echo "<h3><font color=\"#dd0000\">";
			echo "Cannot add more items, shopping cart is full!";
			echo "</font></h3>\n";
		}
	?>

	<br>

	<form action="shopping_cart.php" method="get">
	<input type="hidden" name="ADD_FLAG" value="N">

	<table border="1">
	<tr>
	  <th align="left"><b>Qty:</b></th>
	  <th align="left"><b>Product:</b></th>
	</tr>
	<?php 
		$sc_sub_total = 0.00;
		$keys = array_keys($_SESSION['scl_i_id']);

		while (list($idx, $key) = each($keys))
		{
			$name_id  = "I_ID_" . $key;
			$name_qty = "QTY_" . $key;
			echo "<tr>";
			echo "<td align=\"left\" valign=\"top\">";
			echo "<input type=\"hidden\" name=\"" . $name_id . "\" value=\"" . $_SESSION['scl_i_id'][$key] . "\">"; 
			echo "<input name=\"" . $name_qty . "\" value=\"" . $_SESSION['scl_qty'][$key] . "\" size=\"10\">";
			echo "</td>";
			echo "<td align=\"left\" valign=\"top\" nowrap><p>";
			echo "<i>" . $_SESSION['scl_title'][$key] . "</i> - Backing: " . $_SESSION['scl_backing'][$key];
echo " (ID:" . $_SESSION['scl_i_id'][$key] . ") ";
			echo "<br>";
			echo "SRP. $" . $_SESSION['scl_srp'][$key] . ", ";
			echo "<font color=\"#dd0000\">Your Price: $" . $_SESSION['scl_cost'][$key] . "</font>";
			echo "</p></td>";
			echo "</tr>\n";

			$sc_sub_total = $sc_sub_total + (double)$_SESSION['scl_cost'][$key] * (double)$_SESSION['scl_qty'][$key];
		}
	?>
	</table>

	<p>
		<b>Subtotal Price: $<?php printf("%.2f", $sc_sub_total); ?></b>
		<br>
		Last updated: <?= date("Y-m-d H:i:s", $_SESSION['sc_date_sec']) ?>
	</p>

	<br>
	<table border="0" cellpadding="0" cellspacing="0">
	  <tr>
	    <td valign="top">
		  <a href="customer_registration.php">
		    <img border="0" src="<?= $image_pref ?>/checkout.gif">
		  </a>
		</td>
	    <td valign="top">
		  <a href="home.php">
		    <img border="0" src="<?= $image_pref ?>/home.gif">
		  </a>
		</td>
	  </tr>
	</table>

	<p>
	  If you have changed the quantities and/or taken anything out<br>
	  of your shopping cart, click here to refresh your shopping cart:
	</p>

	<table border="0" cellpadding="0" cellspacing="0">
	  <tr>
	    <td valign="top">
		  <input type="image" border="0" src="<?= $image_pref ?>/refresh.gif">
		</td>
	  </tr>
	</table>

	</form>

  </center>
<?php echo "<!-- TPCW-MAGIC-PAGE-END -->\n"; ?>
</body>
</html>