Implement the 'is_inside' attribute for the TimePeriod type

refs #8467

doc/6-object-types.md

@@ -586,6 +586,11 @@ Configuration Attributes:
 The `/etc/icinga2/conf.d/timeperiods.conf` file is usually used to define
 timeperiods including this one.
 
+Runtime Attributes:
+
+  Name                      | Type          | Description
+  --------------------------|---------------|-----------------
+  is\_insidek               | Boolean       | Whether we're currently inside this timeperiod.
 
 ## <a id="objecttype-scheduleddowntime"></a> ScheduledDowntime
 

lib/icinga/timeperiod.cpp

@@ -217,6 +217,11 @@ void TimePeriod::UpdateRegion(double begin, double end, bool clearExisting)
 	}
 }
 
+bool TimePeriod::GetIsInside(void) const
+{
+	return IsInside(Utility::GetTime());
+}
+
 bool TimePeriod::IsInside(double ts) const
 {
 	ObjectLock olock(this);

lib/icinga/timeperiod.hpp

@@ -43,6 +43,8 @@ public:
 
 	void UpdateRegion(double begin, double end, bool clearExisting);
 
+	virtual bool GetIsInside(void) const;
+
 	bool IsInside(double ts) const;
 	double FindNextTransition(double begin);
 

lib/icinga/timeperiod.ti

@@ -38,6 +38,9 @@ class TimePeriod : CustomVarObject
 	[state] Value valid_begin;
 	[state] Value valid_end;
 	[state] Array::Ptr segments;
+	[no_storage] bool is_inside {
+		get;
+	};
 };
 
 }