How does one track states?

main.cpp

#include <Arduino.h>
#include <Serial.h>

#define THRESHOLD 1.23

String states[4] = {
  "Ready to dock", // Phone is not in cradle    || !ps1 & !ps2 & !ds 
  "Docking",       // Phone is docking          ||  ps1 &  ps2 & !ds
  "Is Docked",     // Phone is docked in cradle ||  ps1 &  ps2 &  ds 
  "Ejecting"       // Phone is ejecting         ||  ps1 &  ps2 & !ds
};

// Is phone in cradle?
bool phone_sensor_1;
bool phone_sensor_2;

// Is the phone docked?
bool dock_sensor;

int current_state;

void setup() {
  Serial.begin(9600);
  while (!Serial) {
    ;
  }
}

void loop() {
  updateSensors();
  current_state = getCurrentState(current_state);

  if (current_state == 0 && (phone_sensor_1 && phone_sensor_2)) {
    current_state = 1;
    dockPhone();
  } 
  else if (current_state == 2 && readIRSensor()) {
    bool do_it = true;
    for (int i = 0; i < 10; i++) {
      delay(50);
      if (!readIRSensor()) {
        do_it = false;
        break;
      }
    }
    if (do_it) {
      current_state = 3;
      ejectPhone();
    }
  }
}

void dockPhone() {
  // Do docking stuff here
}

void updateSensors() {
  phone_sensor_1 = readOpticalSensor(1, THRESHOLD);
  phone_sensor_2 = readOpticalSensor(2, THRESHOLD);
  dock_sensor    = readDockSensor();
}

bool readIRSensor() {
  // Read your sensor here and return the value
  return true;
}

int getCurrentState(int current_state) {
  if (phone_sensor_1 && phone_sensor_2 && dock_sensor) {
    return 2;
  }
  if (!phone_sensor_1 && !phone_sensor_2 && !dock_sensor) {
    return 0;
  }
  return current_state;
}

bool doServoStuff() {
  return true;
}

bool readOpticalSensor(int sensor, float threshold) {
  if (getProximityValue(sensor) > threshold) {
    return true;
  };
  return false;
}

float getProximityValue(int sensor) {
  return 10.0;
}