renderbug-cpp/src/Config.h

#pragma once
#include <Figments.h>
#include "JsonCoordinateMapping.h"
#include <ArduinoJson.h>

class Configuration {
  public:
    Configuration(const JsonObject& data);
    const char* get(const char* key, const char* defaultVal) const;
    int get(const char* key, int defaultVal) const;
    bool get(const char* key, bool defaultVal) const;

  private:
    const JsonObject& m_json;
};

class ConfigTaskMixin : public virtual Loopable {
  public:
    void handleEvent(const InputEvent &evt) override;

    void loop() override {}

    virtual void handleConfigChange(const Configuration& config) {}
};

struct HardwareConfig {
    uint8_t version = 3;
    uint8_t checksum = 0;
    struct Data {
        char loadedProfile[16] = {0};
        uint8_t lastRed = 255;
        uint8_t lastGreen = 255;
        uint8_t lastBlue = 255;
        char lastScene[16] = {0};
    };
    Data data;

    static HardwareConfig load();
    void save();
    bool isValid() const;

    static constexpr uint16_t MAX_LED_NUM = 512;

private:
    uint8_t getCRC() const;

    static constexpr uint8_t CRC7_POLY = 0x91;
};

// A task that manages the EEPROM settings and coord mapping when modified via
// Particle. This allows for multiple devices with wildly different displays to
// run the same code
struct ConfigService: public Task {
    ConfigService() : Task("Configuration") {state = Task::Running;}
    void onStart();
    void loop() override;
    void handleEvent(const InputEvent &evt) override;
    const CoordinateMapping* coordMap() const { return &m_jsonMap; }
    const char* loadedProfile() const;
    void overrideProfile(const char* profileName);
    const char* getConfigValue(const char* key) const;

private:
    HardwareConfig m_config;
    JsonCoordinateMapping m_jsonMap;
    const char* m_overrideProfile = nullptr;

    bool loadProfile(const char* name);
    bool loadMap(const String&  mapName);
};