interface changes

added new data-strcutures for new sensors
new helper methods
fixed some issues

sensors/radio/VAPGrouper.h

@@ -50,18 +50,27 @@ private:
 	/** the signal-strength aggregation algorithm to use */
 	const Aggregation agg;
 
+	/** respect only outputs with at-least X occurences of one physical hardware [can be used to prevent issues] */
+	int minOccurences;
+
 public:
 
 	/** ctor */
-	VAPGrouper(const Mode mode, const Aggregation agg) : mode(mode), agg(agg) {
-
+	VAPGrouper(const Mode mode, const Aggregation agg, const int minOccurences = 2) :
+		mode(mode), agg(agg), minOccurences(minOccurences) {
+		;
 	}
 
+	/** set the number of needed occurences per VAP-group to be accepted */
+	void setMinOccurences(const int min) {
+		this->minOccurences = min;
+	}
 
 	/** get a vap-grouped version of the given input */
 	WiFiMeasurements group(const WiFiMeasurements& original) const {
 
 		// first, group all VAPs into a vector [one vector per VAP-group]
+		// by using the modified MAC address that all VAPs have in common
 		std::unordered_map<MACAddress, std::vector<WiFiMeasurement>> grouped;
 
 		for (const WiFiMeasurement& m : original.entries) {
@@ -72,8 +81,9 @@ public:
 
 		}
 
-		// output
+		// to-be-constructed output
 		WiFiMeasurements result;
+		int skipped = 0;
 
 		// perform aggregation on each VAP-group
 		for (auto it : grouped) {
@@ -81,6 +91,9 @@ public:
 			const MACAddress& base = it.first;
 			const std::vector<WiFiMeasurement>& vaps = it.second;
 
+			// remove entries that do not satify the min-occurences metric
+			if ((int)vaps.size() < minOccurences) {++skipped; continue;}
+
 			// group all VAPs into one measurement
 			const WiFiMeasurement groupedMeasurement = groupVAPs(base, vaps);
 
@@ -89,7 +102,12 @@ public:
 
 		}
 
-		Log::add(name, "grouped " + std::to_string(original.entries.size()) + " measurements into " + std::to_string(result.entries.size()), true);
+		// debug
+		Log::add(name,
+				 "grouped " + std::to_string(original.entries.size()) + " measurements " +
+				 "into " + std::to_string(result.entries.size()) + " [omitted: " + std::to_string(skipped) + "]",
+				true
+		);
 
 
 		// done