immich-frame/src/button_handler.h

#pragma once

#include <Arduino.h>
#include "config.h"

class PowerManager;
class SettingsManager;

enum class ButtonEvent : uint8_t {
    None,
    NextPhoto,
    RandomPhoto,
    PlayPause,
    DeepSleep,
    FactoryReset
};

class ButtonHandler {
public:
    void begin(PowerManager& power, SettingsManager& settings);
    ButtonEvent poll();

private:
    PowerManager* _power = nullptr;
    SettingsManager* _settings = nullptr;

    unsigned long _btnTopPressTime = 0;
    unsigned long _btnUpPressTime = 0;
    unsigned long _btnDownPressTime = 0;

    bool _btnTopPressed = false;
    bool _btnUpPressed = false;
    bool _btnDownPressed = false;

    // Double-press detection for BTN_TOP
    unsigned long _btnTopLastRelease = 0;
    bool _btnTopPendingSingle = false;
    static constexpr unsigned long DOUBLE_PRESS_WINDOW = 400;

    unsigned long _lastDebounce = 0;

    bool debounced(unsigned long now);
};