Implement MollieIdealPaymentEvent.

By subscribing to this event, we can be notified of updated payment
information.

README.rst

@@ -205,6 +205,10 @@ interfaces. And obviously you can give it any name you want.)
 Then use ``<object>/absolute_url/@@report_payment_status`` as the
 ``report_url`` when requesting the payment URL.
 
+The view also emits an event: ``MollieIdealPaymentEvent``. So by
+implementing a subscriber in your own package, you can get a
+notification if the payment information of an object is updated.
+
 
 More information
 ================

collective/mollie/browser/report.py

@@ -1,5 +1,7 @@
+from zope.event import notify
 from zope.publisher.browser import BrowserView
 
+from collective.mollie.events import MollieIdealPaymentEvent
 from collective.mollie.interfaces import IMollieIdealPayment
 
 
@@ -20,5 +22,6 @@ def __call__(self):
             return message
 
         adapted.get_payment_status()
+        notify(MollieIdealPaymentEvent(self.context))
         self.request.response.setStatus(200)
         return 'OK'

collective/mollie/events.py

@@ -0,0 +1,10 @@
+from zope.interface import implements
+
+from collective.mollie.interfaces import IMollieIdealPaymentEvent
+
+
+class MollieIdealPaymentEvent(object):
+    implements(IMollieIdealPaymentEvent)
+
+    def __init__(self, obj):
+        self.obj = obj

collective/mollie/interfaces.py

@@ -87,3 +87,9 @@ def get_payment_url(partner_id, bank_id, amount, message,
 
     def get_payment_status():
         """Retrieve and return the payment status."""
+
+
+class IMollieIdealPaymentEvent(Interface):
+    """An event signalling that Mollie an iDeal payment has been processed."""
+
+    obj = Attribute('The object the payment was processed for.')

collective/mollie/tests/test_unit.py

@@ -3,6 +3,7 @@
 
 from mock import MagicMock
 
+from zope.component import eventtesting
 from zope.component import getMultiAdapter
 from zope.component import getUtility
 from zope.publisher.browser import TestRequest
@@ -11,6 +12,7 @@
 from collective.mollie.ideal import MollieAPIError
 from collective.mollie.interfaces import IMollieIdeal
 from collective.mollie.interfaces import IMollieIdealPayment
+from collective.mollie.interfaces import IMollieIdealPaymentEvent
 from collective.mollie.testing import COLLECTIVE_MOLLIE_INTEGRATION_TESTING
 from collective.mollie.testing import Foo
 
@@ -337,9 +339,11 @@ def setUp(self):
         self.adapted = IMollieIdealPayment(self.foo)
         self.adapted._partner_id = '999999'
         self.adapted.transaction_id = '482d599bbcc7795727650330ad65fe9b'
+        eventtesting.setUp()
 
     def tearDown(self):
         self.ideal._do_request = self.ideal.old_do_request
+        eventtesting.clearEvents()
 
     def test_missing_transaction_id(self):
         """Check missing transaction_id is invalid."""
@@ -377,3 +381,14 @@ def test_correct_processing(self):
                                               name='report_payment_status')
         report_payment_view()
         self.assertTrue(self.adapted.payed)
+
+    def test_payment_event(self):
+        """Check that the MollieIdealPaymentEvent was fired."""
+        request = TestRequest(
+            form=dict(transaction_id=self.adapted.transaction_id))
+        report_payment_view = getMultiAdapter((self.foo, request),
+                                              name='report_payment_status')
+        report_payment_view()
+        payment_events = [event for event in eventtesting.getEvents()
+                          if IMollieIdealPaymentEvent.providedBy(event)]
+        self.assertTrue(len(payment_events) > 0)