use more efficient bson2json for stats

ffmap/web/filters.py

@@ -3,6 +3,7 @@
 from flask import Blueprint
 from dateutil import tz
 from bson.json_util import dumps as bson2json
+import json
 import datetime
 import re
 
@@ -62,6 +63,12 @@ def format_dt_ago(dt):
 def bson_to_json(bsn):
 	return bson2json(bsn)
 
+@filters.app_template_filter('statbson2json')
+def statbson_to_json(bsn):
+	for point in bsn:
+		point["time"] = {"$date": int(point["time"].timestamp()*1000)}
+	return json.dumps(bsn)
+
 @filters.app_template_filter('nbsp')
 def nbsp(txt):
 	return txt.replace(" ", " ")

ffmap/web/templates/router.html

@@ -284,6 +284,6 @@
 		</div>
 	</div>
 	<script type="text/javascript">
-		var router_stats = {{ router.stats|bson2json|safe }};
+		var router_stats = {{ router.stats|statbson2json|safe }};
 	</script>
 {% endblock %}