Some very basic functionality associated with cancel_url, including the ability to try again on the pledge.

frontend/templates/pledge_cancel.html

@@ -11,6 +11,18 @@
     <div class="thank-you">Would you consider pledging in the future?</div>
 
     <div>{{output}}</div>
+    
+{% if transaction %}
+    <div>You did not complete {{transaction.id}}</div>
+{% else %}
+    <div>What transaction are you talking about?</div>
+{% endif %}
+
+<div>correct_user: {{correct_user}}</div>
+<div>correct_transaction_type: {{correct_transaction_type}}</div>
+
+<div><a href="{{try_again_url}}">pledge again</a></div>
+    
 {% endblock %}
 
 

frontend/urls.py

@@ -48,7 +48,7 @@ urlpatterns = patterns(
     #may want to deprecate the following
     url(r"^setup/work/(?P<work_id>\d+)/$", "work", {'action':'setup_campaign'}, name="setup_campaign"),
     url(r"^pledge/(?P<work_id>\d+)/$", login_required(PledgeView.as_view()), name="pledge"),
-    url(r"^pledge/cancel/$", PledgeCancelView.as_view(), name="pledge_cancel"),
+    url(r"^pledge/cancel/$", login_required(PledgeCancelView.as_view()), name="pledge_cancel"),
     url(r"^pledge/complete/$", PledgeCompleteView.as_view(), name="pledge_complete"),
     url(r"^celery/clear/$","clear_celery_tasks", name="clear_celery_tasks"),
     url(r"^subjects/$", "subjects", name="subjects"),

frontend/views.py

@@ -42,8 +42,9 @@ from regluit.frontend.forms import UserData, ProfileForm, CampaignPledgeForm, Go
 from regluit.frontend.forms import  RightsHolderForm, UserClaimForm, LibraryThingForm, OpenCampaignForm
 from regluit.frontend.forms import  ManageCampaignForm, DonateForm, CampaignAdminForm, EmailShareForm, FeedbackForm
 from regluit.payment.manager import PaymentManager
-from regluit.payment.parameters import TARGET_TYPE_CAMPAIGN, TARGET_TYPE_DONATION
-from regluit.payment.paypal import Preapproval, IPN_PAY_STATUS_ACTIVE, IPN_PAY_STATUS_INCOMPLETE, IPN_PAY_STATUS_COMPLETED, IPN_PAY_STATUS_CANCELED
+from regluit.payment.models import Transaction
+from regluit.payment.parameters import TARGET_TYPE_CAMPAIGN, TARGET_TYPE_DONATION, PAYMENT_TYPE_AUTHORIZATION
+from regluit.payment.paypal import Preapproval, IPN_PAY_STATUS_NONE, IPN_PAY_STATUS_ACTIVE, IPN_PAY_STATUS_INCOMPLETE, IPN_PAY_STATUS_COMPLETED, IPN_PAY_STATUS_CANCELED, IPN_TYPE_PREAPPROVAL
 from regluit.core import goodreads
 from tastypie.models import ApiKey
 from regluit.payment.models import Transaction
@@ -337,6 +338,46 @@ class PledgeCancelView(TemplateView):
         output += self.request.method + "\n" + str(self.request.REQUEST.items())
         context["output"] = output
         
+        if self.request.user.is_authenticated():
+            user = self.request.user
+        else:
+            user = None
+        
+        # pull out the transaction id and try to get the corresponding Transaction
+        transaction_id = self.request.REQUEST.get("tid")
+        transaction = Transaction.objects.get(id=transaction_id)
+        
+        # we need to check whether the user tied to the transaction is indeed the authenticated user.
+        
+        correct_user = False 
+        try:
+            if user.id == transaction.user.id:
+                correct_user = True
+        except Exception, e:
+            pass
+            
+        # check that the user had not already approved the transaction
+        # do we need to first run PreapprovalDetails to check on the status
+        
+        # is it of type=PAYMENT_TYPE_AUTHORIZATION and status is NONE or ACTIVE (but approved is false)
+        
+        if transaction.type == PAYMENT_TYPE_AUTHORIZATION:
+            correct_transaction_type = 'True'
+        else:
+            correct_transaction_type = 'False'
+            
+        # status?
+        
+        # give the user an opportunity to approved the transaction again
+        # provide a URL to click on.
+        # https://www.sandbox.paypal.com/?cmd=_ap-preapproval&preapprovalkey=PA-6JV656290V840615H
+        try_again_url = '%s?cmd=_ap-preapproval&preapprovalkey=%s' % (settings.PAYPAL_PAYMENT_HOST, transaction.preapproval_key)
+        
+        context["transaction"] = transaction
+        context["correct_user"] = correct_user
+        context["correct_transaction_type"] = correct_transaction_type
+        context["try_again_url"] = try_again_url
+        
         return context
     
     

payment/manager.py

@@ -4,7 +4,7 @@ from django.contrib.auth.models import User
 from django.core.urlresolvers import reverse
 
 from regluit.payment.parameters import *
-from regluit.payment.paypal import Pay, Execute, IPN, IPN_TYPE_PAYMENT, IPN_TYPE_PREAPPROVAL, IPN_TYPE_ADJUSTMENT, IPN_PAY_STATUS_ACTIVE, IPN_PAY_STATUS_INCOMPLETE
+from regluit.payment.paypal import Pay, Execute, IPN, IPN_TYPE_PAYMENT, IPN_TYPE_PREAPPROVAL, IPN_TYPE_ADJUSTMENT, IPN_PAY_STATUS_ACTIVE, IPN_PAY_STATUS_INCOMPLETE, IPN_PAY_STATUS_NONE 
 from regluit.payment.paypal import Preapproval, IPN_PAY_STATUS_COMPLETED, CancelPreapproval, PaymentDetails, PreapprovalDetails, IPN_SENDER_STATUS_COMPLETED, IPN_TXN_STATUS_COMPLETED
 from regluit.payment.paypal import RefundPayment
 import uuid
@@ -629,7 +629,7 @@ class PaymentManager( object ):
         
         if cancel_url is None:
             cancel_path = "{0}?{1}".format(reverse('pledge_cancel'), 
-                                urllib.urlencode({'id':t.id}))            
+                                urllib.urlencode({'tid':t.id}))            
             cancel_url = urlparse.urljoin(settings.BASE_URL, cancel_path)
         
         p = Preapproval(t, amount, expiry, return_url=return_url, cancel_url=cancel_url)