WOPayPal.java

//
// WOPayPal.java
// Project WOPayPal
//
// Created by travis on Tue Feb 12 2002
//

package er.wopaypal;

import com.webobjects.foundation.NSMutableSet;
import com.webobjects.foundation.NSNotificationCenter;
import com.webobjects.foundation.NSSelector;

import er.extensions.foundation.ERXProperties;

/** WOPayPal is the principal class in the framework.  It gets initialized first, and contains the setup for initializing the framework's functionality
 */
public class WOPayPal {
    public static final String PAYPAL_URL_BASE = "http://www.paypal.com/";
    public static final String PAYPAL_SECURE_URL_BASE = "https://www.paypal.com/";
    public static final String PAYPAL_SANDBOX_URL_BASE = "https://www.sandbox.paypal.com/";
    public static final Class[] NotificationClassArray = { com.webobjects.foundation.NSNotification.class };
    private static NSMutableSet _retainer = new NSMutableSet();

    /** Property name to determine if we are using the sandbox or the live site
     */
    public static final String SANDBOX_MODE_PROP = "er.wopaypal.sandboxmode";
    
    /** Constructor.
     */
    public WOPayPal() {
        super();
    }


    /** ivar to determine whether the framework has been set up or not.
     */
    private static boolean _isInitialized=false;
    /** called implicitly because WOPaypal is the principal class of the framework.
     */
    static {
        if (!_isInitialized) {
            // This is OK to call multiple times as it will only be configured the first time.
            try {
                registerPayPalNotificationListenerObservers();
                _isInitialized=true;
            } catch (Exception e) {
                System.out.println("Caught exception: " + e.getMessage() + " stack: ");
                e.printStackTrace();
            }
        }
    }

    /** registerPayPalNotificationListenerObservers sets up the observer in the PayPalNotificationListener to receive notifications of Instant Payment Notifications from the PayPalAction class' ipnAction method.
     */
    public static void registerPayPalNotificationListenerObservers() {
        Object observer = PayPalNotificationListener.observer();
        _retainer.addObject(observer);

        NSNotificationCenter.defaultCenter().addObserver(observer,
                              new NSSelector("handleDeniedPaymentNotification", NotificationClassArray),
                              PayPalNotificationListener.DeniedPayPalPaymentReceivedNotification,
                              null);
        NSNotificationCenter.defaultCenter().addObserver(observer,
                              new NSSelector("handleFailedPaymentNotification", NotificationClassArray),
                              PayPalNotificationListener.FailedPayPalPaymentReceivedNotification,
                              null);
        NSNotificationCenter.defaultCenter().addObserver(observer,
                              new NSSelector("handleInvalidPaymentNotification", NotificationClassArray),
                              PayPalNotificationListener.InvalidPayPalPaymentReceivedNotification,
                              null);
        NSNotificationCenter.defaultCenter().addObserver(observer,
                              new NSSelector("handlePendingPaymentNotification", NotificationClassArray),
                              PayPalNotificationListener.PendingPayPalPaymentReceivedNotification,
                              null);
        NSNotificationCenter.defaultCenter().addObserver(observer,
                              new NSSelector("handleValidPaymentNotification", NotificationClassArray),
                              PayPalNotificationListener.ValidPayPalPaymentReceivedNotification,
                              null);
    }
    
    /**
     * Does the er.wopaypal.sandboxmode is set to true?
     */
    public static final boolean isSandboxMode() {
    	return ERXProperties.booleanForKeyWithDefault(SANDBOX_MODE_PROP, false);
    }
    
    /**
     * Return the base URL for the PayPal site, either the live or sandbox URL.
     */
    public static final StringBuffer baseUrl() {
    	StringBuffer sb = new StringBuffer();
        if (WOPayPal.isSandboxMode()) {
        	sb.append(WOPayPal.PAYPAL_SANDBOX_URL_BASE);
        } else {
            sb.append(WOPayPal.PAYPAL_SECURE_URL_BASE);      	
        }
        return sb;
    }

}