#include <Toggle.h> // https://github.com/Dlloydev/Toggle

class ToggleGroup : public Toggle {
  public:
    ToggleGroup(const char * name, const byte buttonPin, const byte ledPin, const byte latchPin)
      : name(name), buttonPin(buttonPin), ledPin(ledPin), latchPin(latchPin) {}

    void begin() {
      pinMode(ledPin, OUTPUT);
      pinMode(latchPin, OUTPUT);
      Toggle::begin(buttonPin);
    }

    void ledOn() {
      digitalWrite(ledPin, HIGH);
    }
    void ledOff() {
      digitalWrite(ledPin, LOW);
    }
    void latchOn() {
      digitalWrite(latchPin, HIGH);
    }
    void latchOff() {
      digitalWrite(latchPin, LOW);
    }
    const char * getName() {
      return name;
    }

    void check() {
      Toggle::poll();
      if (Toggle::onPress()) {
        Serial.print(name);
        Serial.println(" pressed");
      }
      else if (Toggle::onRelease()) {
        Serial.print(name);
        Serial.println(" released");
      }
    }

  private:
    const char * name;
    byte buttonPin;
    byte ledPin;
    byte latchPin;
};

ToggleGroup groups[] = {
  {"G1", 2, 13, 9},
  {"G2", 3, 14, 10},
  {"G3", 4, 15, 11},
  {"G4", 5, 16, 12},
};

void setup() {
  for (auto& g : groups) g.begin();
  Serial.begin(115200);
  Serial.println("READY");
}

void loop() {
  for (auto& g : groups) g.check();
}