water_heater.h

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#pragma once
 
#include "esphome/core/component.h"
#include "esphome/core/entity_base.h"
#include "esphome/core/finite_set_mask.h"
#include "esphome/core/helpers.h"
#include "esphome/core/log.h"
#include "esphome/core/preferences.h"
 
namespace esphome::water_heater {
 
class WaterHeater;
struct WaterHeaterCallInternal;
 
void log_water_heater(const char *tag, const char *prefix, const char *type, WaterHeater *obj);
#define LOG_WATER_HEATER(prefix, type, obj) log_water_heater(TAG, prefix, LOG_STR_LITERAL(type), obj)
 
enum WaterHeaterMode : uint32_t {
  WATER_HEATER_MODE_OFF = 0,
  WATER_HEATER_MODE_ECO = 1,
  WATER_HEATER_MODE_ELECTRIC = 2,
  WATER_HEATER_MODE_PERFORMANCE = 3,
  WATER_HEATER_MODE_HIGH_DEMAND = 4,
  WATER_HEATER_MODE_HEAT_PUMP = 5,
  WATER_HEATER_MODE_GAS = 6,
};
 
// Type alias for water heater mode bitmask
// Replaces std::set<WaterHeaterMode> to eliminate red-black tree overhead
using WaterHeaterModeMask =
    FiniteSetMask<WaterHeaterMode, DefaultBitPolicy<WaterHeaterMode, WATER_HEATER_MODE_GAS + 1>>;
 
enum WaterHeaterFeature : uint32_t {
  WATER_HEATER_SUPPORTS_CURRENT_TEMPERATURE = 1 << 0,
  WATER_HEATER_SUPPORTS_TARGET_TEMPERATURE = 1 << 1,
  WATER_HEATER_SUPPORTS_OPERATION_MODE = 1 << 2,
  WATER_HEATER_SUPPORTS_AWAY_MODE = 1 << 3,
  WATER_HEATER_SUPPORTS_ON_OFF = 1 << 4,
  WATER_HEATER_SUPPORTS_TWO_POINT_TARGET_TEMPERATURE = 1 << 5,
};
 
enum WaterHeaterStateFlag : uint32_t {
  WATER_HEATER_STATE_AWAY = 1 << 0,
  WATER_HEATER_STATE_ON = 1 << 1,
};
 
struct SavedWaterHeaterState {
  WaterHeaterMode mode;
  union {
    float target_temperature;
    struct {
      float target_temperature_low;
      float target_temperature_high;
    };
  } __attribute__((packed));
  uint32_t state;
} __attribute__((packed));
 
class WaterHeaterCall {
  friend struct WaterHeaterCallInternal;
 
 public:
  WaterHeaterCall() : parent_(nullptr) {}
 
  WaterHeaterCall(WaterHeater *parent);
 
  WaterHeaterCall &set_mode(WaterHeaterMode mode);
  WaterHeaterCall &set_mode(const std::string &mode);
  WaterHeaterCall &set_target_temperature(float temperature);
  WaterHeaterCall &set_target_temperature_low(float temperature);
  WaterHeaterCall &set_target_temperature_high(float temperature);
  WaterHeaterCall &set_away(bool away);
  WaterHeaterCall &set_on(bool on);
 
  void perform();
 
  const optional<WaterHeaterMode> &get_mode() const { return this->mode_; }
  float get_target_temperature() const { return this->target_temperature_; }
  float get_target_temperature_low() const { return this->target_temperature_low_; }
  float get_target_temperature_high() const { return this->target_temperature_high_; }
  uint32_t get_state() const { return this->state_; }
 
 protected:
  void validate_();
  WaterHeater *parent_;
  optional<WaterHeaterMode> mode_;
  float target_temperature_{NAN};
  float target_temperature_low_{NAN};
  float target_temperature_high_{NAN};
  uint32_t state_{0};
};
 
struct WaterHeaterCallInternal : public WaterHeaterCall {
  WaterHeaterCallInternal(WaterHeater *parent) : WaterHeaterCall(parent) {}
 
  WaterHeaterCallInternal &set_from_restore(const WaterHeaterCall &restore) {
    this->mode_ = restore.mode_;
    this->target_temperature_ = restore.target_temperature_;
    this->target_temperature_low_ = restore.target_temperature_low_;
    this->target_temperature_high_ = restore.target_temperature_high_;
    this->state_ = restore.state_;
    return *this;
  }
};
 
class WaterHeaterTraits {
 public:
  void add_feature_flags(uint32_t flags) { this->feature_flags_ |= flags; }
  void clear_feature_flags(uint32_t flags) { this->feature_flags_ &= ~flags; }
  bool has_feature_flags(uint32_t flags) const { return (this->feature_flags_ & flags) == flags; }
  uint32_t get_feature_flags() const { return this->feature_flags_; }
 
  bool get_supports_current_temperature() const {
    return this->has_feature_flags(WATER_HEATER_SUPPORTS_CURRENT_TEMPERATURE);
  }
  void set_supports_current_temperature(bool supports) {
    if (supports) {
      this->add_feature_flags(WATER_HEATER_SUPPORTS_CURRENT_TEMPERATURE);
    } else {
      this->clear_feature_flags(WATER_HEATER_SUPPORTS_CURRENT_TEMPERATURE);
    }
  }
 
  bool get_supports_away_mode() const { return this->has_feature_flags(WATER_HEATER_SUPPORTS_AWAY_MODE); }
  void set_supports_away_mode(bool supports) {
    if (supports) {
      this->add_feature_flags(WATER_HEATER_SUPPORTS_AWAY_MODE);
    } else {
      this->clear_feature_flags(WATER_HEATER_SUPPORTS_AWAY_MODE);
    }
  }
 
  bool get_supports_two_point_target_temperature() const {
    return this->has_feature_flags(WATER_HEATER_SUPPORTS_TWO_POINT_TARGET_TEMPERATURE);
  }
  void set_supports_two_point_target_temperature(bool supports) {
    if (supports) {
      this->add_feature_flags(WATER_HEATER_SUPPORTS_TWO_POINT_TARGET_TEMPERATURE);
    } else {
      this->clear_feature_flags(WATER_HEATER_SUPPORTS_TWO_POINT_TARGET_TEMPERATURE);
    }
  }
 
  void set_min_temperature(float min_temperature) { this->min_temperature_ = min_temperature; }
  float get_min_temperature() const { return this->min_temperature_; }
 
  void set_max_temperature(float max_temperature) { this->max_temperature_ = max_temperature; }
  float get_max_temperature() const { return this->max_temperature_; }
 
  void set_target_temperature_step(float target_temperature_step) {
    this->target_temperature_step_ = target_temperature_step;
  }
  float get_target_temperature_step() const { return this->target_temperature_step_; }
 
  void set_supported_modes(WaterHeaterModeMask modes) { this->supported_modes_ = modes; }
  const WaterHeaterModeMask &get_supported_modes() const { return this->supported_modes_; }
  bool supports_mode(WaterHeaterMode mode) const { return this->supported_modes_.count(mode); }
 
 protected:
  // Ordered to minimize padding: 4-byte members first
  uint32_t feature_flags_{0};
  float min_temperature_{0.0f};
  float max_temperature_{0.0f};
  float target_temperature_step_{0.0f};
  WaterHeaterModeMask supported_modes_;
};
 
class WaterHeater : public EntityBase, public Component {
 public:
  WaterHeaterMode get_mode() const { return this->mode_; }
  float get_current_temperature() const { return this->current_temperature_; }
  float get_target_temperature() const { return this->target_temperature_; }
  float get_target_temperature_low() const { return this->target_temperature_low_; }
  float get_target_temperature_high() const { return this->target_temperature_high_; }
  uint32_t get_state() const { return this->state_; }
  bool is_away() const { return (this->state_ & WATER_HEATER_STATE_AWAY) != 0; }
  bool is_on() const { return (this->state_ & WATER_HEATER_STATE_ON) != 0; }
 
  void set_current_temperature(float current_temperature) { this->current_temperature_ = current_temperature; }
 
  virtual void publish_state();
  virtual WaterHeaterTraits get_traits();
  virtual WaterHeaterCallInternal make_call() = 0;
 
#ifdef USE_WATER_HEATER_VISUAL_OVERRIDES
  void set_visual_min_temperature_override(float min_temperature_override);
  void set_visual_max_temperature_override(float max_temperature_override);
  void set_visual_target_temperature_step_override(float visual_target_temperature_step_override);
#endif
  virtual void control(const WaterHeaterCall &call) = 0;
 
  void setup() override;
 
  optional<WaterHeaterCall> restore_state();
 
 protected:
  virtual WaterHeaterTraits traits() = 0;
 
  void dump_traits_(const char *tag);
 
  void set_mode_(WaterHeaterMode mode) { this->mode_ = mode; }
  void set_target_temperature_(float target_temperature) { this->target_temperature_ = target_temperature; }
  void set_target_temperature_low_(float target_temperature_low) {
    this->target_temperature_low_ = target_temperature_low;
  }
  void set_target_temperature_high_(float target_temperature_high) {
    this->target_temperature_high_ = target_temperature_high;
  }
  void set_state_(uint32_t state) { this->state_ = state; }
  void set_state_flag_(uint32_t flag, bool value) {
    if (value) {
      this->state_ |= flag;
    } else {
      this->state_ &= ~flag;
    }
  }
 
  WaterHeaterMode mode_{WATER_HEATER_MODE_OFF};
  float current_temperature_{NAN};
  float target_temperature_{NAN};
  float target_temperature_low_{NAN};
  float target_temperature_high_{NAN};
  uint32_t state_{0};  // Bitmask of WaterHeaterStateFlag
 
#ifdef USE_WATER_HEATER_VISUAL_OVERRIDES
  float visual_min_temperature_override_{NAN};
  float visual_max_temperature_override_{NAN};
  float visual_target_temperature_step_override_{NAN};
#endif
 
  ESPPreferenceObject pref_;
};
 
const LogString *water_heater_mode_to_string(WaterHeaterMode mode);
 
}  // namespace esphome::water_heater