Refresh at startup and add refresh timestamp

Add a refresh timestamp, and generate the page at startup
(to pick up recent ethercalc changes).

Change-Id: I1fec2e29cabf434e0aa4466d426ce7f1777198b4

html/ptg.html

@@ -13,7 +13,6 @@
 <p>See what is being discussed currently at the PTG, and what's coming next.<p>
 <div id="PTGsessions">
 </div>
-<p class="text-muted">Content on this page is being driven by room operators through the ptgbot on the #openstack-ptg IRC channel.</p>
 </div>
 
 <script id="PTGtemplate" type="text/x-handlebars-template">
@@ -59,6 +58,7 @@
   {{/each}}
   </table>
 </div>
+<p class="text-muted">Content on this page is being driven by room operators through the ptgbot on the #openstack-ptg IRC channel. It was last refreshed on {{timestamp}}.</p>
 
 </script>
 

ptgbot/db.py

@@ -16,6 +16,7 @@
 
 import json
 import os
+import datetime
 
 
 class PTGDataBase():
@@ -30,6 +31,7 @@ class PTGDataBase():
                 self.data = json.load(fp)
         else:
             self.data = self.BASE
+        self.save()
 
     def add_now(self, room, session):
         self.data['now'][room] = session
@@ -76,5 +78,7 @@ class PTGDataBase():
     def save(self):
         if self.ethercalc:
             self.data['ethercalc'] = self.ethercalc.load()
+        timestamp = datetime.datetime.now()
+        self.data['timestamp'] = '{:%Y-%m-%d %H:%M:%S}'.format(timestamp)
         with open(self.filename, 'w') as fp:
             json.dump(self.data, fp)