Add a notification when identity is viewed

emails/identity-viewed.spt

@@ -0,0 +1,14 @@
+{{ _("Identity Viewed") }}
+[---] text/html
+{{ _( "This is a transactional email to let you know that {a_viewer}{viewer}{_a} viewed your identity information for {a_country}{country_name}{_a} on Gratipay."
+    , viewer=viewer
+    , country_name=country_name
+    , a_viewer=('<a href="https://gratipay.com/~{}/">'|safe).format(viewer)
+    , a_country=('<a href="https://gratipay.com/about/me/identities/{}">'|safe).format(country_code)
+    , _a='</a>'|safe
+     ) }}
+[---] text/plain
+{{ _( "This is a transactional email to let you know that {viewer} viewed your identity information for {country_name} on Gratipay."
+    , viewer=viewer
+    , country_name=country_name
+     ) }}

tests/py/test_identity_pages.py

@@ -1,11 +1,14 @@
-from gratipay.testing import Harness
+from __future__ import absolute_import, division, print_function, unicode_literals
+
 from gratipay.models.country import Country
 from gratipay.models.participant import Participant
+from gratipay.testing.emails import EmailHarness
 
 
-class Tests(Harness):
+class Tests(EmailHarness):
 
     def setUp(self):
+        super(Tests, self).setUp()
         self.make_participant('alice', claimed_time='now', is_admin=True)
         self.make_participant('whit537', id=1451, email_address='[email protected]',
             claimed_time='now', is_admin=True)
@@ -57,9 +60,13 @@ def test_ip_is_200_for_self(self):
     def test_ip_is_403_for_most_admins(self):
         assert self.client.GxT('/~bob/identities/TT', auth_as='alice').code == 403
 
-    def test_ip_is_200_for_whit537_yikes(self):
+    def test_ip_is_200_for_whit537_yikes_O_O(self):
         assert self.client.GET('/~bob/identities/TT', auth_as='whit537').code == 200
 
+    def test_ip_notifies_participant_when_whit537_views(self):
+        self.client.GET('/~bob/identities/TT', auth_as='whit537')
+        assert 'whit537 viewed your identity' in self.get_last_email()['body_text']
+
     def test_ip_is_404_for_unknown_code(self):
         assert self.client.GxT('/~bob/identities/XX', auth_as='bob').code == 404
 

www/~/%username/identities/%country.spt

@@ -18,7 +18,7 @@ if not participant.email_address:
 # load country
 country_code = request.path['country']
 country = Country.from_code(country_code)
-title = locale.countries.get(country_code)
+title = country_name = locale.countries.get(country_code)
 if country is None or title is None:
     raise Response(404)
 
@@ -35,6 +35,15 @@ for _identity in identities:
 if identity is None and nidentities >= 3:
     website.redirect('./', base_url='')  # Not allowed to add any more!
 
+# notify users whenever someone views their info
+if identity is not None and participant != user.participant:
+    participant.send_email( 'identity-viewed'
+                          , viewer=user.participant.username
+                          , country_name=country_name
+                          , country_code=country.code
+                          , include_unsubscribe=False
+                           )
+
 # handle POST requests
 if request.method == 'POST':
     action = request.body['action']