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CHAPTER 12 STORING CUSTOMER ORDERS
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We need to make a few changes to the business tier as well. We need to modify the UpdateOrder method of the Orders class, and add three new methods to the same class: GetByCustomerId GetOrderShortDetails GetCustomersList These new methods support the new administrative functionality you ll need in the admin_orders.tpl presentation tier template.
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Exercise: Modifying the Business Tier
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1. Add a new method named GetByCustomerId to the Orders class in business/Orders.php: // Gets all orders placed by a specified customer public static function GetByCustomerId($customerId) { // Build the SQL query $sql = 'SELECT * FROM orders_get_by_customer_id(:customer_id);'; // Build the parameters array $params = array (':customer_id' => $customerId); // Prepare the statement with PDO-specific functionality $result = DatabaseHandler::Prepare($sql); // Execute the query and return the results return DatabaseHandler::GetAll($result, $params); } 2. Add a new method named GetOrderShortDetails to the Orders class: // Get short details for an order public static function GetOrderShortDetails($orderId) { // Build the SQL query $sql = 'SELECT * FROM orders_get_order_short_details(:order_id);'; // Build the parameters array $params = array (':order_id' => $orderId); // Prepare the statement with PDO-specific functionality $result = DatabaseHandler::Prepare($sql); // Execute the query and return the results return DatabaseHandler::GetAll($result, $params); }
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CHAPTER 12 STORING CUSTOMER ORDERS
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3. Modify the UpdateOrder method of the Orders class as follows: // Updates order details public static function UpdateOrder($orderId, $status, $comments, $authCode, $reference) { // Build the SQL query $sql = 'SELECT orders_update_order(:order_id, :status, :comments, :auth_code, :reference);'; // Build the parameters array $params = array (':order_id' => $orderId, ':status' => $status, ':comments' => $comments, ':auth_code' => $authCode, ':reference' => $reference); // Prepare the statement with PDO-specific functionality $result = DatabaseHandler::Prepare($sql); // Execute the query return DatabaseHandler::Execute($result, $params); } 4. Add a new method named GetCustomersList to the Customer class in business/customer.php: // Gets all customers names with their associated id public static function GetCustomersList() { // Build the SQL query $sql = 'SELECT * FROM customer_get_customers_list();'; // Prepare the statement with PDO-specific functionality $result = DatabaseHandler::Prepare($sql); // Execute the query and return the results return DatabaseHandler::GetAll($result); }
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Now you need to update the presentation tier to make use of the new data tier and business tier features. You re not going to implement massive changes to the order administration code at this stage because you ll just end up modifying it later after you ve finished the new orderprocessing system. Figure 12-1 shows the admin_orders template. This page gives administrators various means of filtering current orders.
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CHAPTER 12 STORING CUSTOMER ORDERS
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Figure 12-1. The orders_admin template in action No matter what selection method you use, you ll get a list with the orders that match the criteria. In Figure 12-2, you can see the two orders I ve just placed.
Figure 12-2. The orders admin page The admin_order_details template looks like Figure 12-3. Notice also the Tax and Shipping data, which you ll add later in this chapter.
CHAPTER 12 STORING CUSTOMER ORDERS
Figure 12-3. Administering order details
Exercise: Modifying the Presentation Tier
1. Add the highlighted piece of code to presentation/templates/admin_orders.tpl: <form action="{"admin.php"|prepare_link:"https"}" method="get"> <input name="Page" type="hidden" value="Orders" /> <span class="admin_page_text">Show orders by customer</span> <select name="customer_id"> {section name=cCustomers loop=$admin_orders->mCustomers} <option value="{$admin_orders->mCustomers[cCustomers].customer_id}" {if $admin_orders->mCustomers[cCustomers].customer_id == $admin_orders->mCustomerId}selected="selected"{/if}> {$admin_orders->mCustomers[cCustomers].name} </option> {/section} </select>
CHAPTER 12 STORING CUSTOMER ORDERS
<input type="submit" name="submitByCustomer" value="Go!" /> <br /><br /> <span class="admin_page_text">Get by order ID</span> <input name="orderId" type="text" value="{$admin_orders->mOrderId}" /> <input type="submit" name="submitByOrderId" value="Go!" /> <br /><br /> <span class="admin_page_text">Show the most recent</span> <input name="recordCount" type="text" value="{$admin_orders->mRecordCount}" /> 2. Add the highlighted members to the AdminOrders class in presentation/smarty_plugins/ function.load_admin_orders.php: public public public public $mErrorMessage = ''; $mCustomers; $mCustomerId; $mOrderId;
3. Add the highlighted code to the init() method of the AdminOrders class in presentation/smarty_plugins/function.load_admin_orders.php: // If "Show orders by status" filter is in action ... if (isset ($_GET['submitOrdersByStatus'])) { $this->mSelectedStatus = $_GET['status']; $this->mOrders = Orders::GetOrdersByStatus($this->mSelectedStatus); } // If the "Show orders by customer ID" filter is in action ... if (isset ($_GET['submitByCustomer'])) { if (empty ($_GET['customer_id'])) $this->mErrorMessage = 'No customer has been selected'; else { $this->mCustomerId = $_GET['customer_id']; $this->mOrders = Orders::GetByCustomerId($this->mCustomerId); } } // If the "Get order by ID" filter is in action ... if (isset ($_GET['submitByOrderId'])) { if (empty ($_GET['orderId'])) $this->mErrorMessage = 'You must enter an order ID.'; else { $this->mOrderId = $_GET['orderId']; $this->mOrders = Orders::GetOrderShortDetails($this->mOrderId);
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