component.h

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#pragma once

#include <cmath>
#include <cstdint>
#include <functional>
#include <string>

#include "esphome/core/optional.h"

namespace esphome {

namespace setup_priority {

extern const float BUS;
extern const float IO;
extern const float HARDWARE;
extern const float DATA;
extern const float HARDWARE_LATE;
extern const float PROCESSOR;
extern const float BLUETOOTH;
extern const float AFTER_BLUETOOTH;
extern const float WIFI;
extern const float ETHERNET;
extern const float BEFORE_CONNECTION;
extern const float AFTER_WIFI;
extern const float AFTER_CONNECTION;
extern const float LATE;

}  // namespace setup_priority

static const uint32_t SCHEDULER_DONT_RUN = 4294967295UL;

#define LOG_UPDATE_INTERVAL(this) \
  if (this->get_update_interval() == SCHEDULER_DONT_RUN) { \
    ESP_LOGCONFIG(TAG, "  Update Interval: never"); \
  } else if (this->get_update_interval() < 100) { \
    ESP_LOGCONFIG(TAG, "  Update Interval: %.3fs", this->get_update_interval() / 1000.0f); \
  } else { \
    ESP_LOGCONFIG(TAG, "  Update Interval: %.1fs", this->get_update_interval() / 1000.0f); \
  }

extern const uint32_t COMPONENT_STATE_MASK;
extern const uint32_t COMPONENT_STATE_CONSTRUCTION;
extern const uint32_t COMPONENT_STATE_SETUP;
extern const uint32_t COMPONENT_STATE_LOOP;
extern const uint32_t COMPONENT_STATE_FAILED;
extern const uint32_t STATUS_LED_MASK;
extern const uint32_t STATUS_LED_OK;
extern const uint32_t STATUS_LED_WARNING;
extern const uint32_t STATUS_LED_ERROR;

enum class RetryResult { DONE, RETRY };

class Component {
 public:
  virtual void setup();

  virtual void loop();

  virtual void dump_config();

  virtual float get_setup_priority() const;

  float get_actual_setup_priority() const;

  void set_setup_priority(float priority);

  virtual float get_loop_priority() const;

  void call();

  virtual void on_shutdown() {}
  virtual void on_safe_shutdown() {}

  uint32_t get_component_state() const;

  virtual void mark_failed();

  bool is_failed() const;

  bool is_ready() const;

  virtual bool can_proceed();

  bool status_has_warning() const;

  bool status_has_error() const;

  void status_set_warning(const char *message = "unspecified");

  void status_set_error(const char *message = "unspecified");

  void status_clear_warning();

  void status_clear_error();

  void status_momentary_warning(const std::string &name, uint32_t length = 5000);

  void status_momentary_error(const std::string &name, uint32_t length = 5000);

  bool has_overridden_loop() const;

  void set_component_source(const char *source) { component_source_ = source; }
  const char *get_component_source() const;

 protected:
  friend class Application;

  virtual void call_loop();
  virtual void call_setup();
  virtual void call_dump_config();

  void set_interval(const std::string &name, uint32_t interval, std::function<void()> &&f);  // NOLINT

  void set_interval(uint32_t interval, std::function<void()> &&f);  // NOLINT

  bool cancel_interval(const std::string &name);  // NOLINT

  void set_retry(const std::string &name, uint32_t initial_wait_time, uint8_t max_attempts,       // NOLINT
                 std::function<RetryResult(uint8_t)> &&f, float backoff_increase_factor = 1.0f);  // NOLINT

  void set_retry(uint32_t initial_wait_time, uint8_t max_attempts, std::function<RetryResult(uint8_t)> &&f,  // NOLINT
                 float backoff_increase_factor = 1.0f);                                                      // NOLINT

  bool cancel_retry(const std::string &name);  // NOLINT

  void set_timeout(const std::string &name, uint32_t timeout, std::function<void()> &&f);  // NOLINT

  void set_timeout(uint32_t timeout, std::function<void()> &&f);  // NOLINT

  bool cancel_timeout(const std::string &name);  // NOLINT

  void defer(const std::string &name, std::function<void()> &&f);  // NOLINT

  void defer(std::function<void()> &&f);  // NOLINT

  bool cancel_defer(const std::string &name);  // NOLINT

  uint32_t component_state_{0x0000};  
  float setup_priority_override_{NAN};
  const char *component_source_{nullptr};
};

class PollingComponent : public Component {
 public:
  PollingComponent() : PollingComponent(0) {}

  explicit PollingComponent(uint32_t update_interval);

  virtual void set_update_interval(uint32_t update_interval);

  // ========== OVERRIDE METHODS ==========
  // (You'll only need this when creating your own custom sensor)
  virtual void update() = 0;

  // ========== INTERNAL METHODS ==========
  // (In most use cases you won't need these)
  void call_setup() override;

  virtual uint32_t get_update_interval() const;

  // Start the poller, used for component.suspend
  void start_poller();

  // Stop the poller, used for component.suspend
  void stop_poller();

 protected:
  uint32_t update_interval_;
};

class WarnIfComponentBlockingGuard {
 public:
  WarnIfComponentBlockingGuard(Component *component);
  ~WarnIfComponentBlockingGuard();

 protected:
  uint32_t started_;
  Component *component_;
};

}  // namespace esphome