Let users filter by type of event

At the moment we have two types of event, ‘service’ events and ‘API key’
events. They are munged together which is useful initially, but could
get noisy.

This commit adds filters (copied from the choose template page) that let
users narrow down the list to one of the two types of event. This might
help users get a clearer picture of what’s going on.

app/main/views/history.py

@@ -1,6 +1,6 @@
 from collections import defaultdict
 
-from flask import render_template
+from flask import render_template, request
 
 from app import current_service, format_date_numeric
 from app.main import main
@@ -14,12 +14,16 @@ def history(service_id):
     return render_template(
         'views/temp-history.html',
         days=_chunk_events_by_day(
-            _get_events(current_service.id)
+            _get_events(current_service.id, request.args.get('selected'))
         )
     )
 
 
-def _get_events(service_id):
+def _get_events(service_id, selected):
+    if selected == 'api':
+        return APIKeyEvents(service_id)
+    if selected == 'service':
+        return ServiceEvents(service_id)
     return APIKeyEvents(service_id) + ServiceEvents(service_id)
 
 
@@ -27,7 +31,7 @@ def _chunk_events_by_day(events):
 
     days = defaultdict(list)
 
-    for event in reversed(events):
+    for event in events:
         days[format_date_numeric(event.time)].append(event)
 
     return sorted(days.items(), reverse=True)