// Source: https://forum.arduino.cc/index.php?topic=14479.0

#include "button.h"

Button::Button(byte pin) {
  this->pin = pin;
  init();
}

void Button::init() {
  pinMode(pin, INPUT);
}

byte Button::getState() {
  byte event = 0;
  buttonVal = digitalRead(pin);
  // Button pressed down
  if (buttonVal == LOW && buttonLast == HIGH && (millis() - upTime) > debounce)
  {
    event = 1;
    downTime = millis();
    ignoreUp = false;
  }
  // Button released
  else if (buttonVal == HIGH && buttonLast == LOW && (millis() - downTime) > debounce)
  {        
    if (not ignoreUp) upTime = millis();
  }

  // Test for hold
  if (buttonVal == LOW && (millis() - downTime) >= holdTime) {
    // Trigger "normal" hold
    event = 2;
    ignoreUp = true;
    // Trigger "long" hold
    if ((millis() - downTime) >= longHoldTime)
    {
      event = 3;
    }
  }
  buttonLast = buttonVal;
  return event;
}