IndicatorLights.h

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#pragma once
 
#include "LED.h"
 
template <size_t N>
class IndicatorLights {
 public:
  IndicatorLights() = delete;
  explicit IndicatorLights(LED (&&lights)[N], size_t maxIlluminated = N)
      : m_lights(lights), m_initialized(false), m_numLEDs(N), m_maxIlluminated(maxIlluminated), m_numIlluminated(0) {}
 
  void Initialize() {
    if (!m_initialized) {
      for (size_t i = 0; i < N; ++i) {
        m_lights[i].Initialize();
      }
      m_initialized = true;
    }
  }
 
  void Update() {
    if (m_initialized) {
      for (size_t i = 0; i < N; ++i) {
        m_lights[i].Update();
      }
    }
  }
 
  void On(size_t idx) {
    if (m_initialized && idx < m_numLEDs) {
      bool activeIllumination = m_lights[idx].GetIlluminated();
      if (!activeIllumination && m_numIlluminated < m_maxIlluminated) {
        ++m_numIlluminated;
        m_lights[idx].On();
      }
    }
  }
 
  void Off(size_t idx) {
    if (m_initialized && idx < m_numLEDs) {
      bool activeIllumination = m_lights[idx].GetIlluminated();
      if (activeIllumination) {
        --m_numIlluminated;
        m_lights[idx].Off();
      }
    }
  }
 
  void Set(size_t idx, bool val) {
    if (m_initialized) {
      if (val) {
        On(idx);
      } else {
        Off(idx);
      }
    }
  }
 
  LED::LEDPattern GetPattern(size_t idx) const {
    LED::LEDPattern retVal = LED::LEDPattern::SOLID;
    if (m_initialized && idx < m_numLEDs) {
      retVal = m_lights[idx].GetPattern();
    }
    return retVal;
  }
 
  void SetPattern(size_t idx, LED::LEDPattern newPattern) {
    if (m_initialized && idx < m_numLEDs) {
      m_lights[idx].SetPattern(newPattern);
    }
  }
 
  size_t GetNumLights() const { return m_numLEDs; }
 
  bool GetIlluminated(size_t idx) const {
    bool retVal = false;
    if (m_initialized && idx < m_numLEDs) {
      retVal = m_lights[idx].GetIlluminated();
    }
    return retVal;
  }
 
 private:
  LED m_lights[N];
  bool m_initialized;
  const size_t m_numLEDs;
  const size_t m_maxIlluminated;
  size_t m_numIlluminated;
};