Skip timeseries without recent data

dashboard.py

@@ -1,5 +1,6 @@
 import json
 import logging
+import time
 
 from flask import (Flask, request, jsonify, abort, render_template_string, render_template)
 from markupsafe import Markup
@@ -23,6 +24,13 @@ class Dashboard:
                 if w.get("multi"):
                     ts_list = LTS.find(w["data"][0])
                     for ts in ts_list:
+                        tso = LTS(id=ts)
+                        if not tso.data:
+                            log.warning("%s has no data: Skipping", tso.id)
+                            continue
+                        if tso.data[-1][0] < time.time() - 86400:
+                            log.info("%s too old; Skipping", tso.id)
+                            continue
                         w1 = {**w, "data": [ts]}
                         self.widgets.append(Gauge(w1))
                 else: