add IPN signal for failed payments in subscription

paypal/standard/conf.py

@@ -15,7 +15,7 @@ class PayPalSettingsError(Exception):
 SANDBOX_POSTBACK_ENDPOINT = "https://www.sandbox.paypal.com/cgi-bin/webscr"
 
 # Images
-IMAGE = getattr(settings, "PAYPAL_IMAGE", "http://images.paypal.com/images/x-click-but01.gif")
+IMAGE = getattr(settings, "PAYPAL_IMAGE", "https://images.paypal.com/images/x-click-but01.gif")
 SUBSCRIPTION_IMAGE = getattr(settings, "PAYPAL_SUBSCRIPTION_IMAGE", "https://www.paypal.com/en_US/i/btn/btn_subscribeCC_LG.gif")
 DONATION_IMAGE = getattr(settings, "PAYPAL_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")

paypal/standard/forms.py

@@ -99,6 +99,10 @@ def __init__(self, button_type="buy", *args, **kwargs):
         super(PayPalPaymentsForm, self).__init__(*args, **kwargs)
         self.button_type = button_type
 
+    def smart_render(self):
+        """Render for PayPal if not PAYPAL_DEBUG, for PayPay Sandbox if PAYPAL_DEBUG."""
+        return self.render() if not settings.PAYPAL_DEBUG else self.sandbox()
+
     def render(self):
         return mark_safe(u"""<form action="%s" method="post">
     %s
@@ -217,3 +221,8 @@ class PayPalStandardBaseForm(forms.ModelForm):
     next_payment_date = forms.DateTimeField(required=False, input_formats=PAYPAL_DATE_FORMAT)
     subscr_date = forms.DateTimeField(required=False, input_formats=PAYPAL_DATE_FORMAT)
     subscr_effective = forms.DateTimeField(required=False, input_formats=PAYPAL_DATE_FORMAT)
+    auction_closing_date = forms.DateTimeField(required=False, input_formats=PAYPAL_DATE_FORMAT)
+    case_creation_date = forms.DateTimeField(required=False, input_formats=PAYPAL_DATE_FORMAT)
+    # format not documented by PayPal, but empirically consistent
+    retry_at = forms.DateTimeField(required=False, input_formats=PAYPAL_DATE_FORMAT)
+

paypal/standard/ipn/admin.py

@@ -63,7 +63,7 @@ class PayPalIPNAdmin(admin.ModelAdmin):
         "__unicode__", "flag", "flag_info", "invoice", "custom", 
         "payment_status", "created_at"
     ]
-    search_fields = ["txn_id", "recurring_payment_id"]
+    search_fields = ["txn_id", "recurring_payment_id", "subscr_id"]
 
 
-admin.site.register(PayPalIPN, PayPalIPNAdmin)
+admin.site.register(PayPalIPN, PayPalIPNAdmin)

paypal/standard/ipn/models.py

@@ -42,7 +42,7 @@ def send_signals(self):
                 recurring_skipped.send(sender=self)
             elif self.is_recurring_failed():
                 recurring_failed.send(sender=self)
-       # Subscription signals:
+        # Subscription signals:
         else:
             if self.is_subscription_cancellation():
                 subscription_cancel.send(sender=self)
@@ -51,4 +51,6 @@ def send_signals(self):
             elif self.is_subscription_end_of_term():
                 subscription_eot.send(sender=self)
             elif self.is_subscription_modified():
-                subscription_modify.send(sender=self)            
+                subscription_modify.send(sender=self)            
+            elif self.is_subscription_failed():
+                subscription_failed.send(sender=self)

paypal/standard/ipn/signals.py

@@ -24,6 +24,9 @@
 # Sent when a subscription is created.
 subscription_signup = Signal()
 
+# Sent when a subscription's payment fails
+subscription_failed = Signal()
+
 # recurring_payment_profile_created
 recurring_create = Signal()
 
@@ -34,4 +37,4 @@
 
 recurring_skipped = Signal()
 
-recurring_failed = Signal()
+recurring_failed = Signal()

paypal/standard/models.py

@@ -211,6 +211,9 @@ def is_subscription_modified(self):
     def is_subscription_signup(self):
         return self.txn_type == "subscr_signup"
 
+    def is_subscription_failed(self):
+        return self.txn_type == "subscr_failed"
+
     def is_recurring_create(self):
         return self.txn_type == "recurring_payment_profile_created"
 

paypal/standard/nvp/__init__.py

@@ -0,0 +1,64 @@
+# Partial implementation of the NameValuePair interface of PayPal
+
+# currently allows:
+# * change status of subscription/recurring payment
+
+import urllib
+import urllib2
+import urlparse
+
+from django.conf import settings
+
+base_params = {
+        'USER': settings.PAYPAL_API_USERNAME,
+        'PWD': settings.PAYPAL_API_PASSWORD,
+        'SIGNATURE': settings.PAYPAL_API_SIGNATURE,
+        'VERSION': '60.0'
+        }
+
+
+
+class PayPalResponse:
+    def __init__(self, raw_data):
+        self.raw = raw_data
+        self.parse()
+
+    def parse(self):
+        self.params = urlparse.parse_qs(self.raw)
+
+
+class RecurringSubscription:
+    def __init__(self, profileid):
+        self.profileid = profileid
+
+    def __unicode__(self):
+        return str(self.profileid)
+
+    def __str__(self):
+        return self.__unicode__()
+
+    def updateStatus(self, new_status):
+        """Update the status of the recurring payment profile.
+
+        new_status is in { Cancel, Suspend, Reactivate }."""
+
+        if new_status not in ('Cancel', 'Suspend', 'Reactivate'):
+            raise ValueError("Invalid value '%s' for new_status. Must be in Cancel, Suspend, Reactivate." % new_status)
+
+        pars = {
+                'METHOD': 'ManageRecurringPaymentsProfileStatus',
+                'PROFILEID': self.profileid,
+                'ACTION': new_status
+                }
+
+        ok, params = self.issue_cmd(pars)
+        return ok
+
+    def issue_cmd(self, parameters):
+        parameters = dict(base_params.items() + parameters.items())
+        data = urllib.urlencode(parameters)
+        req = urllib2.Request(settings.PAYPAL_API_NVP_ENDPOINT, data, {})
+        resp = urllib2.urlopen(req).read()
+        resp_params = urlparse.parse_qs(resp)
+        return all([x.lower() == 'success' for x in resp_params['ACK']]), resp_params
+