fan state callback mechanism

custom_components/empty_custom_fan/fan/empty_custom_fan.cpp

@@ -18,7 +18,12 @@ void EmptyCustomFan::setup() {
 }
 
 void EmptyCustomFan::loop() {
+  if (!this->next_update_) {
+    return; //no state change, nothing to do
+  }
+  this->next_update_ = false;
   
+  //there was a state change, do something here.
 }
 
 void EmptyCustomFan::dump_config() {

custom_components/empty_custom_fan/fan/empty_custom_fan.h

@@ -14,14 +14,10 @@ class EmptyCustomFan : public Component {
   void setup() override;
   void loop() override;
   void dump_config() override;
-  void set_oscillating(output::BinaryOutput *oscillating) { this->oscillating_ = oscillating; }
-  void set_direction(output::BinaryOutput *direction) { this->direction_ = direction; }
   
  protected:
   fan::FanState *fan_;
   output::BinaryOutput *output_;
-  output::BinaryOutput *oscillating_{nullptr};
-  output::BinaryOutput *direction_{nullptr};
   bool next_update_{true};
 };