sensor.h

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#pragma once

#include "esphome/core/log.h"
#include "esphome/core/component.h"
#include "esphome/core/entity_base.h"
#include "esphome/core/helpers.h"
#include "esphome/components/sensor/filter.h"

#include <vector>

namespace esphome {
namespace sensor {

#define LOG_SENSOR(prefix, type, obj) \
  if ((obj) != nullptr) { \
    ESP_LOGCONFIG(TAG, "%s%s '%s'", prefix, LOG_STR_LITERAL(type), (obj)->get_name().c_str()); \
    if (!(obj)->get_device_class().empty()) { \
      ESP_LOGCONFIG(TAG, "%s  Device Class: '%s'", prefix, (obj)->get_device_class().c_str()); \
    } \
    ESP_LOGCONFIG(TAG, "%s  State Class: '%s'", prefix, state_class_to_string((obj)->get_state_class()).c_str()); \
    ESP_LOGCONFIG(TAG, "%s  Unit of Measurement: '%s'", prefix, (obj)->get_unit_of_measurement().c_str()); \
    ESP_LOGCONFIG(TAG, "%s  Accuracy Decimals: %d", prefix, (obj)->get_accuracy_decimals()); \
    if (!(obj)->get_icon().empty()) { \
      ESP_LOGCONFIG(TAG, "%s  Icon: '%s'", prefix, (obj)->get_icon().c_str()); \
    } \
    if (!(obj)->unique_id().empty()) { \
      ESP_LOGV(TAG, "%s  Unique ID: '%s'", prefix, (obj)->unique_id().c_str()); \
    } \
    if ((obj)->get_force_update()) { \
      ESP_LOGV(TAG, "%s  Force Update: YES", prefix); \
    } \
  }

#define SUB_SENSOR(name) \
 protected: \
  sensor::Sensor *name##_sensor_{nullptr}; \
\
 public: \
  void set_##name##_sensor(sensor::Sensor *sensor) { this->name##_sensor_ = sensor; }

enum StateClass : uint8_t {
  STATE_CLASS_NONE = 0,
  STATE_CLASS_MEASUREMENT = 1,
  STATE_CLASS_TOTAL_INCREASING = 2,
  STATE_CLASS_TOTAL = 3,
};

std::string state_class_to_string(StateClass state_class);

class Sensor : public EntityBase, public EntityBase_DeviceClass, public EntityBase_UnitOfMeasurement {
 public:
  explicit Sensor();

  int8_t get_accuracy_decimals();
  void set_accuracy_decimals(int8_t accuracy_decimals);

  StateClass get_state_class();
  void set_state_class(StateClass state_class);

  bool get_force_update() const { return force_update_; }
  void set_force_update(bool force_update) { force_update_ = force_update; }

  void add_filter(Filter *filter);

  void add_filters(const std::vector<Filter *> &filters);

  void set_filters(const std::vector<Filter *> &filters);

  void clear_filters();

  float get_state() const;
  float get_raw_state() const;

  void publish_state(float state);

  // ========== INTERNAL METHODS ==========
  // (In most use cases you won't need these)
  void add_on_state_callback(std::function<void(float)> &&callback);
  void add_on_raw_state_callback(std::function<void(float)> &&callback);

  float state;

  float raw_state;

  bool has_state() const;

  virtual std::string unique_id();

  void internal_send_state_to_frontend(float state);

 protected:
  CallbackManager<void(float)> raw_callback_;  
  CallbackManager<void(float)> callback_;      

  Filter *filter_list_{nullptr};  

  optional<int8_t> accuracy_decimals_;                  
  optional<StateClass> state_class_{STATE_CLASS_NONE};  
  bool force_update_{false};                            
  bool has_state_{false};
};

}  // namespace sensor
}  // namespace esphome