Add a duration check criteria: last_check

Allows to filter elements on the last check time

module/datamanager.py

@@ -543,9 +543,12 @@ def search_hosts_and_services(self, search, user, get_impacts=True, sorter=None,
                 except ValueError:
                     items = []
 
-            if t == 'duration':
+            if t in ['duration', 'last_check']:
                 seconds_per_unit = {"s": 1, "m": 60, "h": 3600, "d": 86400, "w": 604800}
-                times = [(i, time.time() - int(i.last_state_change)) for i in items]
+                if t == 'duration':
+                    times = [(i, time.time() - int(i.last_state_change)) for i in items]
+                else:
+                    times = [(i, time.time() - int(i.last_chk)) for i in items]
                 try:
                     if s.startswith('>='):
                         s = int(s[2:-1]) * seconds_per_unit[s[-1].lower()]

module/views/modal_helpsearch.tpl

@@ -62,10 +62,11 @@
   <p><strong>Note</strong> that the WebUI has a default configured filter. Hosts and services that do not have a BI greater than or equal this filter will not be dislayed in the UI. Currently, this filter is <code>bi>={{app.problems_business_impact}}</code>.</p>
 
   <h4>Search by duration</h4>
-  <p>You can also search by the duration of the last state change. This is very useful to find elements that are warning or critical for a long time. For example:</p>
+  <p>You can also search by the duration of the last state change or by the elapsed time since the last check. This is very useful to find elements that are warning or critical for a long time or that did not get checked since a while. For example:</p>
   <ul>
     <li><code>isnot:OK duration:>1w</code> Matches hosts and services not OK for at least one week.</li>
     <li><code>isnot:OK duration:<1h</code> Matches hosts and services not OK for less than one hour.</li>
+    <li><code>last_check:>1d</code> Matches hosts and services not checked in the last day.</li>
   </ul>
   <p>You can use the following time units: s(econds), m(inutes), h(ours), d(ays), w(eeks).</p>