initial commit before ownership transfer

code/frank/WiFiSensorReader.h

@@ -0,0 +1,46 @@
+#ifndef WIFISENSORREADER_H
+#define WIFISENSORREADER_H
+
+#include "../SensorReader.h"
+#include "WiFiObservation.h"
+
+#include <cassert>
+
+class WiFiSensorReader {
+
+public:
+
+	/** get wifi observation data from one CSV entry */
+	static WiFiObservation readWifi(const SensorEntry& se) {
+
+		std::string tmp = se.data;
+		WiFiObservation obs;
+
+		// process all APs
+		while(!tmp.empty()) {
+
+			std::string mac = tmp.substr(0, 17);
+			tmp = tmp.substr(17);
+			assert(tmp[0] == ';');	tmp = tmp.substr(1);
+
+			std::string freq = tmp.substr(0, 4);
+			tmp = tmp.substr(4);
+			assert(tmp[0] == ';');	tmp = tmp.substr(1);
+
+			int pos = tmp.find(';');
+			std::string rssi = tmp.substr(0, pos);
+			tmp = tmp.substr(pos);
+			assert(tmp[0] == ';'); tmp = tmp.substr(1);
+
+			WiFiObservationEntry e(se.ts, mac, std::stoi(freq), std::stoi(rssi));
+			obs.entries.push_back(e);
+
+		}
+
+		return obs;
+
+	}
+
+};
+
+#endif // WIFISENSORREADER_H