/*
  Solution For:
  Topics:   How to store a callback inside a class?
  Category: Programming Questions
  Link:     https://forum.arduino.cc/t/how-to-store-a-callback-inside-a-class/1097453
  
  Sketch:   AuCP_ RandomPipes.ino
  Created:  02-Mar-2023
  MicroBeaut (μB)
*/

class Task {
  private:
    typedef void(*callBackFunction)(uint16_t);
    callBackFunction internalCallback = nullptr;
    int duration;
    unsigned long startTime = millis();
  public:
    Task() {};
    void addTask(unsigned long msDuration, callBackFunction function) {
      internalCallback = function;
      duration = msDuration;
      startTime = millis();
    }
    void working(unsigned long index) {
      if (millis() - startTime >= duration) {
        startTime =  millis();
        if (internalCallback) {
          internalCallback(index);
        }
      }
    }
};

typedef void(*callBackFunction)(uint16_t);

const uint8_t numberOfTask = 3;
const uint8_t ledPins[] = {4, 5, 6};

void Task1(uint16_t index);
void Task2(uint16_t index);
void Task3(uint16_t index);

unsigned long time[] = {2000UL, 3000UL, 4000UL};
callBackFunction function[] = {Task1, Task2, Task3};
Task task[numberOfTask];

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  for (uint8_t index = 0; index < numberOfTask ; index++) {
    pinMode(ledPins[index], OUTPUT);
    task[index].addTask(time[index], function[index]);
  }
}

void loop() {
  // put your main code here, to run repeatedly:
  for (uint8_t index = 0; index < numberOfTask ; index++) {
    task[index].working(index);
  }
}

void Task1(uint16_t index) {
  static bool value = 0;
  value = !value;
  digitalWrite(ledPins[index], value);
}

void Task2(uint16_t index) {
  static bool value = 0;
  value = !value;
  digitalWrite(ledPins[index], value);

}

void Task3(uint16_t index) {
  static bool value = 0;
  value = !value;
  digitalWrite(ledPins[index], value);
}