integration_sensor.h

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#pragma once
 
#include "esphome/core/component.h"
#include "esphome/core/preferences.h"
#include "esphome/core/automation.h"
#include "esphome/core/hal.h"
#include "esphome/components/sensor/sensor.h"
 
namespace esphome::integration {
 
enum IntegrationSensorTime {
  INTEGRATION_SENSOR_TIME_MILLISECOND = 0,
  INTEGRATION_SENSOR_TIME_SECOND,
  INTEGRATION_SENSOR_TIME_MINUTE,
  INTEGRATION_SENSOR_TIME_HOUR,
  INTEGRATION_SENSOR_TIME_DAY,
};
 
enum IntegrationMethod {
  INTEGRATION_METHOD_TRAPEZOID = 0,
  INTEGRATION_METHOD_LEFT,
  INTEGRATION_METHOD_RIGHT,
};
 
class IntegrationSensor final : public sensor::Sensor, public Component {
 public:
  void setup() override;
  void dump_config() override;
  void set_sensor(Sensor *sensor) { sensor_ = sensor; }
  void set_time(IntegrationSensorTime time) { time_ = time; }
  void set_method(IntegrationMethod method) { method_ = method; }
  void set_restore(bool restore) { restore_ = restore; }
  void reset() { this->publish_and_save_(0.0f); }
  void set_value(float value) { this->publish_and_save_(value); }
 
 protected:
  void process_sensor_value_(float value);
  float get_time_factor_() {
    switch (this->time_) {
      case INTEGRATION_SENSOR_TIME_MILLISECOND:
        return 1.0f;
      case INTEGRATION_SENSOR_TIME_SECOND:
        return 1.0f / 1000.0f;
      case INTEGRATION_SENSOR_TIME_MINUTE:
        return 1.0f / 60000.0f;
      case INTEGRATION_SENSOR_TIME_HOUR:
        return 1.0f / 3600000.0f;
      case INTEGRATION_SENSOR_TIME_DAY:
        return 1.0f / 86400000.0f;
      default:
        return 0.0f;
    }
  }
  void publish_and_save_(double result) {
    this->result_ = result;
    this->publish_state(result);
    if (this->restore_) {
      float result_f = result;
      this->pref_.save(&result_f);
    }
  }
 
  sensor::Sensor *sensor_;
  IntegrationSensorTime time_;
  IntegrationMethod method_;
  bool restore_;
  ESPPreferenceObject pref_;
 
  uint32_t last_update_;
  double result_{0.0f};
  float last_value_{0.0f};
};
 
}  // namespace esphome::integration