Record login including remembered user login events to the api based of flask login

signals.

app/event_handlers.py

@@ -0,0 +1,52 @@
+from app import events_api_client
+from flask_login import current_user
+
+
+def on_user_logged_in(sender, user):
+    _send_event(sender, event_type='sucessful_login', user=user)
+
+
+# should change the event type? This is a remember me login.
+def on_user_login_confirmed(sender):
+    _send_event(sender, event_type='sucessful_login_remember_me', user=current_user)
+
+
+def _send_event(sender, **kwargs):
+    from flask import request
+    try:
+        event_data = _construct_event_data(request)
+        if kwargs.get('user'):
+            event_data['user_id'] = kwargs.get('user').id
+        if not kwargs.get('event_type'):
+            return
+        events_api_client.create_event(kwargs['event_type'], event_data)
+    except Exception as e:
+        sender.logger.error('Error creating event')
+        sender.logger.error(e)
+
+
+def _construct_event_data(request):
+    return {'ip_address': _get_remote_addr(request),
+            'browser_fingerprint': _get_browser_fingerprint(request)}
+
+
+# This might not be totally correct depending on proxy setup
+def _get_remote_addr(request):
+    if request.headers.getlist("X-Forwarded-For"):
+        return request.headers.getlist("X-Forwarded-For")[0]
+    else:
+        return request.remote_addr
+
+
+def _get_browser_fingerprint(request):
+    browser = request.user_agent.browser
+    version = request.user_agent.version
+    platform = request.user_agent.platform
+    user_agent_string = request.user_agent.string
+    # at some point this may be hashed?
+    finger_print = {'browser': browser,
+                    'platform': platform,
+                    'version': version,
+                    'user_agent_string': user_agent_string}
+
+    return finger_print