Capture when user was last active

CHANGES

@@ -40,6 +40,7 @@ Schema Changes
 - Added ScheduledJob
 - Added GroupResolution.actor_id
 - Added ``ScheduledJob`` model
+- Added User.last_active
 
 API Changes
 ~~~~~~~~~~~

src/sentry/conf/server.py

@@ -243,6 +243,7 @@ def env(key, default='', type=None):
     'django.contrib.sessions.middleware.SessionMiddleware',
     'django.middleware.csrf.CsrfViewMiddleware',
     'sentry.middleware.auth.AuthenticationMiddleware',
+    'sentry.middleware.user.UserActiveMiddleware',
     'sentry.middleware.sudo.SudoMiddleware',
     'sentry.middleware.superuser.SuperuserMiddleware',
     'sentry.middleware.locale.SentryLocaleMiddleware',

src/sentry/middleware/user.py

@@ -0,0 +1,38 @@
+from __future__ import absolute_import
+
+import inspect
+from datetime import timedelta
+from django.utils import timezone
+
+
+class UserActiveMiddleware(object):
+    disallowed_paths = (
+        'sentry.web.frontend.generic.static_media',
+        'sentry.web.frontend.user_avatar',
+    )
+
+    def process_view(self, request, view_func, view_args, view_kwargs):
+        view = view_func
+        if not inspect.isfunction(view_func):
+            view = view.__class__
+
+        try:
+            path = '%s.%s' % (view.__module__, view.__name__)
+        except AttributeError:
+            return
+
+        if path.startswith(self.disallowed_paths):
+            return
+
+        if not request.user.is_authenticated():
+            return
+
+        now = timezone.now()
+        freq = timedelta(minutes=5)
+        last_active = request.user.last_active
+
+        if last_active and freq > (now - last_active):
+            return
+
+        request.user.last_active = now
+        request.user.update(last_active=now)

src/sentry/models/user.py

@@ -64,6 +64,7 @@ class User(BaseModel, AbstractBaseUser):
     session_nonce = models.CharField(max_length=12, null=True)
 
     date_joined = models.DateTimeField(_('date joined'), default=timezone.now)
+    last_active = models.DateTimeField(_('last active'), default=timezone.now, null=True)
 
     objects = UserManager(cache_fields=['pk'])