Add active swarm count to service node list

observer.py

@@ -352,6 +352,7 @@ def main(refresh=None, page=0, per_page=None, first=None, last=None, style=None)
             emission=coinbase.get(),
             hf=hfinfo.get(),
             active_sns=active_sns,
+            active_swarms=len(set(x['swarm_id'] for x in active_sns)),
             inactive_sns=inactive_sns,
             awaiting_sns=awaiting_sns,
             blocks=blocks,
@@ -385,6 +386,7 @@ def sns():
     return flask.render_template('service_nodes.html',
         info=info.get(),
         active_sns=active,
+        active_swarms=len(set(x['swarm_id'] for x in active)),
         awaiting_sns=awaiting,
         inactive_sns=inactive,
         )

static/style.css

@@ -467,7 +467,7 @@ td span.checkpoint-not-signed { color: #c50022; }
     text-overflow: ellipsis;
 }
 
-h3 .sn-count {
+h3 .sn-count, h4 .sn-count {
     font-weight: bold;
 }
 

templates/include/service_nodes_lists.html

@@ -17,6 +17,9 @@
 
 
     <h2 style="margin-bottom: 0px">Active Service Nodes <span class="sn-count">({{active_sns | count}})</span></h2>
+    <h4 class="Subtitle">Current storage swarm count:
+        <span class="sn-count" title="= {{"%.2f"|format(active_sns | count / active_swarms)}} SNs per swarm">{{active_swarms}}</span>
+    </h4>
     <div class="TitleDivider sn-active"></div>
     {%include 'include/sn_active.html'%}
 </div>