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CHAPTER 11 MANAGING CUSTOMER DETAILS
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The customer_update_account function updates the customer s account details in the database. 7. Use the query tool to execute this code, which creates the customer_update_credit_card function in your hatshop database: -- Create customer_update_credit_card function CREATE FUNCTION customer_update_credit_card(INTEGER, TEXT) RETURNS VOID LANGUAGE plpgsql AS $$ DECLARE inCustomerId ALIAS FOR $1; inCreditCard ALIAS FOR $2; BEGIN UPDATE customer SET credit_card = inCreditCard WHERE customer_id = inCustomerId; END; $$; The customer_update_credit_card function updates the customer s credit card information in the database. It only updates the credit_card column for the customer, which contains the encrypted version of the XML document containing the customer s complete credit card details. 8. Use the query tool to execute this code, which creates the customer_get_shipping_regions function in your hatshop database: -- Create customer_get_shipping_regions function CREATE FUNCTION customer_get_shipping_regions() RETURNS SETOF shipping_region LANGUAGE plpgsql AS $$ DECLARE outShippingRegion shipping_region; BEGIN FOR outShippingRegion IN SELECT shipping_region_id, shipping_region FROM shipping_region LOOP RETURN NEXT outShippingRegion; END LOOP; RETURN; END; $$; The customer_get_shipping_regions function returns the shipping regions in the database for the customer address details page. 9. Use the query tool to execute this code, which creates the customer_update_address function in your hatshop database: -- Create customer_update_address function CREATE FUNCTION customer_update_address(INTEGER, VARCHAR(100), VARCHAR(100), VARCHAR(100), VARCHAR(100), VARCHAR(100), VARCHAR(100), INTEGER)
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CHAPTER 11 MANAGING CUSTOMER DETAILS
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RETURNS VOID LANGUAGE plpgsql AS $$ DECLARE inCustomerId ALIAS FOR $1; inAddress1 ALIAS FOR $2; inAddress2 ALIAS FOR $3; inCity ALIAS FOR $4; inRegion ALIAS FOR $5; inPostalCode ALIAS FOR $6; inCountry ALIAS FOR $7; inShippingRegionId ALIAS FOR $8; BEGIN UPDATE customer SET address_1 = inAddress1, address_2 = inAddress2, city = inCity, region = inRegion, postal_code = inPostalCode, country = inCountry, shipping_region_id = inShippingRegionId WHERE customer_id = inCustomerId; END; $$; The customer_update_address function updates the customer s address in the database.
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Implementing the Business Tier
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In the business folder, create a new file named customer.php that will contain the Customer class. The Customer class is a little longer, and it mainly accesses the data tier functionality to respond to requests that come from the presentation tier. Write the following code in the business/customer.php file: < php // Business tier class that manages customer accounts functionality class Customer { // Checks if a customer_id exists in session public static function IsAuthenticated() { if (!(isset ($_SESSION['hatshop_customer_id']))) return 0; else return 1; } // Returns customer_id and password for customer with email $email public static function GetLoginInfo($email) { // Build the SQL query $sql = 'SELECT * FROM customer_get_login_info(:email);';
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CHAPTER 11 MANAGING CUSTOMER DETAILS
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// Build the parameters array $params = array (':email' => $email); // Prepare the statement with PDO-specific functionality $result = DatabaseHandler::Prepare($sql); // Execute the query and return the results return DatabaseHandler::GetRow($result, $params); } public static function IsValid($email, $password) { $customer = self::GetLoginInfo($email); if (empty ($customer['customer_id'])) return 2; $customer_id = $customer['customer_id']; $hashed_password = $customer['password']; if (PasswordHasher::Hash($password) != $hashed_password) return 1; else { $_SESSION['hatshop_customer_id'] = $customer_id; return 0; } } public static function Logout() { unset($_SESSION['hatshop_customer_id']); } public static function GetCurrentCustomerId() { if (self::IsAuthenticated()) return $_SESSION['hatshop_customer_id']; else return 0; } /* Adds a new customer account, log him in if $addAndLogin is true and returns customer_id */ public static function Add($name, $email, $password, $addAndLogin = true) { $hashed_password = PasswordHasher::Hash($password);
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CHAPTER 11 MANAGING CUSTOMER DETAILS
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// Build the SQL query $sql = 'SELECT customer_add(:name, :email, :password);'; // Build the parameters array $params = array (':name' => $name, ':email' => $email, ':password' => $hashed_password); // Prepare the statement with PDO-specific functionality $result = DatabaseHandler::Prepare($sql); // Execute the query and get the customer_id $customer_id = DatabaseHandler::GetOne($result, $params); if ($addAndLogin) $_SESSION['hatshop_customer_id'] = $customer_id; return $customer_id; } public static function Get($customerId = null) { if (is_null($customerId)) $customerId = self::GetCurrentCustomerId(); // Build the SQL query $sql = 'SELECT * FROM customer_get_customer(: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::GetRow($result, $params); } public static function UpdateAccountDetails($name, $email, $password, $dayPhone, $evePhone, $mobPhone, $customerId = null) { if (is_null($customerId)) $customerId = self::GetCurrentCustomerId(); $hashed_password = PasswordHasher::Hash($password); // Build the SQL query $sql = 'SELECT customer_update_account(:customer_id, :name, :email, :password, :day_phone, :eve_phone, :mob_phone);'; // Build the parameters array
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