Add Donation button to standard form button types. Expose possible bu…

…tton types on the form class.

paypal/standard/conf.py

@@ -17,5 +17,8 @@ class PayPalSettingsError(Exception):
 # Images
 IMAGE = getattr(settings, "PAYPAL_IMAGE", "http://images.paypal.com/images/x-click-but01.gif")
 SUBSCRIPTION_IMAGE = "https://www.paypal.com/en_US/i/btn/btn_subscribeCC_LG.gif"
+DONATION_IMAGE = "https://www.paypal.com/en_US/i/btn/btn_donateCC_LG.gif"
 SANDBOX_IMAGE = getattr(settings, "PAYPAL_SANDBOX_IMAGE", "https://www.sandbox.paypal.com/en_US/i/btn/btn_buynowCC_LG.gif")
-SUBSCRIPTION_SANDBOX_IMAGE = "https://www.sandbox.paypal.com/en_US/i/btn/btn_subscribeCC_LG.gif"
+SUBSCRIPTION_SANDBOX_IMAGE = "https://www.sandbox.paypal.com/en_US/i/btn/btn_subscribeCC_LG.gif"
+DONATION_SANDBOX_IMAGE = "https://www.sandbox.paypal.com/en_US/i/btn/btn_donateCC_LG.gif"
+

paypal/standard/forms.py

@@ -46,7 +46,11 @@ class PayPalPaymentsForm(forms.Form):
         (1, "reattempt billing on Failure"), 
         (0, "Do Not reattempt on failure")
     )
-
+
+    BUY = 'buy'
+    SUBSCRIBE = 'subscribe'
+    DONATE = 'donate'
+
     # Where the money goes.
     business = forms.CharField(widget=ValueHiddenInput(), initial=RECEIVER_EMAIL)
 
@@ -110,17 +114,22 @@ def sandbox(self):
 
     def get_image(self):
         return {
-            (True, True): SUBSCRIPTION_SANDBOX_IMAGE,
-            (True, False): SANDBOX_IMAGE,
-            (False, True): SUBSCRIPTION_IMAGE,
-            (False, False): IMAGE
-        }[TEST, self.is_subscription()]
+            (True, self.SUBSCRIBE): SUBSCRIPTION_SANDBOX_IMAGE,
+            (True, self.BUY): SANDBOX_IMAGE,
+            (True, self.DONATE): DONATION_SANDBOX_IMAGE,
+            (False, self.SUBSCRIBE): SUBSCRIPTION_IMAGE,
+            (False, self.BUY): IMAGE,
+            (False, self.DONATE): DONATION_IMAGE,
+        }[TEST, self.button_type]
 
     def is_transaction(self):
-        return self.button_type == "buy"
+        return not self.is_subscription()
+
+    def is_donation(self):
+        return self.button_type == self.DONATE
 
     def is_subscription(self):
-        return self.button_type == "subscribe"
+        return self.button_type == self.SUBSCRIBE
 
 
 class PayPalEncryptedPaymentsForm(PayPalPaymentsForm):