Add Fan stubs, rework Sensors classes

app/include/Fan.h

@@ -0,0 +1,10 @@
+#ifndef FAN_H_
+#define FAN_H_
+
+class Fan {
+public:
+  virtual void PWM(int value) = 0;
+  virtual int RPM() = 0;
+};
+
+#endif // FAN_H_

app/include/HwmonFan.h

@@ -0,0 +1,12 @@
+#ifndef HWMONFAN_H_
+#define HWMONFAN_H_
+
+#include <Fan.h>
+
+class HwmonFan : public Fan {
+public:
+  void PWM(int value) override;
+  int RPM() override;
+};
+
+#endif // HWMONFAN_H_

app/include/HwmonTemperatureSensor.h

@@ -7,8 +7,10 @@
 
 class HwmonTemperatureSensor : public TemperatureSensor {
 public:
+  HwmonTemperatureSensor(sensors_chip_name chipName,
+                         sensors_subfeature subfeature);
+
   int getTemperature() override;
-  std::string toJson() override;
 
 private:
   sensors_chip_name mChipName;

app/include/TemperatureSensor.h

@@ -1,12 +1,13 @@
 #ifndef TEMPERATURESENSOR_H_
 #define TEMPERATURESENSOR_H_
 
+#include <boost/json.hpp>
+
 #include <iostream>
 
 class TemperatureSensor {
 public:
-    virtual int getTemperature() = 0;
-    virtual std::string toJson() = 0;
+  virtual int getTemperature() = 0;
 };
 
 #endif // TEMPERATURESENSOR_H_