move into firmware subfolder
Signed-off-by: Peter Siegmund <developer@mars3142.org>
This commit is contained in:
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#pragma once
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#include <string>
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#include <type_traits>
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/**
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* @interface IPersistenceManager
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* @brief Abstract interface for platform-independent persistence management
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* @details This interface defines the contract for key-value storage and retrieval
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* systems across different platforms (Desktop/SDL3 and ESP32).
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*/
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class IPersistenceManager
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{
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public:
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virtual ~IPersistenceManager() = default;
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/**
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* @brief Template methods for type-safe setting and retrieving of values
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* @tparam T The type of value to set (must be one of: bool, int, float, double, std::string)
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* @param key The key to associate with the value
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* @param value The value to store
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*/
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template<typename T>
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void SetValue(const std::string& key, const T& value) {
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static_assert(std::is_same_v<T, bool> ||
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std::is_same_v<T, int> ||
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std::is_same_v<T, float> ||
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std::is_same_v<T, double> ||
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std::is_same_v<T, std::string>,
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"Unsupported type for IPersistenceManager");
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SetValueImpl(key, value);
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}
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/**
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* @brief Template method for type-safe retrieval of values
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* @tparam T The type of value to retrieve
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* @param key The key to look up
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* @param defaultValue The default value to return if the key is not found
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* @return The stored value or default value if the key doesn't exist
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*/
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template<typename T>
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[[nodiscard]] T GetValue(const std::string& key, const T& defaultValue = T{}) const {
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return GetValueImpl<T>(key, defaultValue);
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}
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/**
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* @brief Utility methods for key management
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*/
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[[nodiscard]] virtual bool HasKey(const std::string& key) const = 0; ///< Check if a key exists
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virtual void RemoveKey(const std::string& key) = 0; ///< Remove a key-value pair
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virtual void Clear() = 0; ///< Clear all stored data
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[[nodiscard]] virtual size_t GetKeyCount() const = 0; ///< Get the number of stored keys
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/**
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* @brief Persistence operations
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*/
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virtual bool Save() = 0; ///< Save data to persistent storage
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virtual bool Load() = 0; ///< Load data from persistent storage
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protected:
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/**
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* @brief Template-specific implementations that must be overridden by derived classes
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* @details These methods handle the actual storage and retrieval of different data types
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*/
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virtual void SetValueImpl(const std::string& key, bool value) = 0;
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virtual void SetValueImpl(const std::string& key, int value) = 0;
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virtual void SetValueImpl(const std::string& key, float value) = 0;
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virtual void SetValueImpl(const std::string& key, double value) = 0;
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virtual void SetValueImpl(const std::string& key, const std::string& value) = 0;
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[[nodiscard]] virtual bool GetValueImpl(const std::string& key, bool defaultValue) const = 0;
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[[nodiscard]] virtual int GetValueImpl(const std::string& key, int defaultValue) const = 0;
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[[nodiscard]] virtual float GetValueImpl(const std::string& key, float defaultValue) const = 0;
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[[nodiscard]] virtual double GetValueImpl(const std::string& key, double defaultValue) const = 0;
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[[nodiscard]] virtual std::string GetValueImpl(const std::string& key, const std::string& defaultValue) const = 0;
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private:
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/**
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* @brief Template dispatch methods for type-safe value retrieval
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* @tparam T The type to retrieve
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* @param key The key to look up
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* @param defaultValue The default value to return
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* @return The retrieved value or default if not found
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*/
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template<typename T>
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[[nodiscard]] T GetValueImpl(const std::string& key, const T& defaultValue) const
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{
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if constexpr (std::is_same_v<T, bool>) {
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return GetValueImpl(key, static_cast<bool>(defaultValue));
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} else if constexpr (std::is_same_v<T, int>) {
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return GetValueImpl(key, static_cast<int>(defaultValue));
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} else if constexpr (std::is_same_v<T, float>) {
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return GetValueImpl(key, static_cast<float>(defaultValue));
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} else if constexpr (std::is_same_v<T, double>) {
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return GetValueImpl(key, static_cast<double>(defaultValue));
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} else if constexpr (std::is_same_v<T, std::string>) {
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return GetValueImpl(key, static_cast<const std::string&>(defaultValue));
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} else {
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static_assert(std::is_same_v<T, bool> ||
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std::is_same_v<T, int> ||
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std::is_same_v<T, float> ||
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std::is_same_v<T, double> ||
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std::is_same_v<T, std::string>,
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"Unsupported type for IPersistenceManager");
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return defaultValue; // This line will never be reached, but satisfies the compiler
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}
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}
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};
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#pragma once
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#include "IPersistenceManager.h"
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#include <string>
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#include <unordered_map>
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#include <nvs.h>
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#include <nvs_flash.h>
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/**
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* @class PersistenceManager
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* @brief ESP32-specific implementation using NVS (Non-Volatile Storage)
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* @details This implementation uses ESP32's NVS API for persistent storage
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* in flash memory, providing a platform-optimized solution for
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* embedded systems.
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*/
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class PersistenceManager final : public IPersistenceManager
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{
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private:
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nvs_handle_t nvs_handle_;
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std::string namespace_;
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bool initialized_;
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public:
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explicit PersistenceManager(const std::string &nvs_namespace = "config");
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~PersistenceManager() override;
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bool HasKey(const std::string &key) const override;
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void RemoveKey(const std::string &key) override;
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void Clear() override;
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size_t GetKeyCount() const override;
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bool Save() override;
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bool Load() override;
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bool Initialize();
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void Deinitialize();
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bool IsInitialized() const
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{
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return initialized_;
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}
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protected:
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void SetValueImpl(const std::string &key, bool value) override;
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void SetValueImpl(const std::string &key, int value) override;
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void SetValueImpl(const std::string &key, float value) override;
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void SetValueImpl(const std::string &key, double value) override;
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void SetValueImpl(const std::string &key, const std::string &value) override;
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bool GetValueImpl(const std::string &key, bool defaultValue) const override;
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int GetValueImpl(const std::string &key, int defaultValue) const override;
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float GetValueImpl(const std::string &key, float defaultValue) const override;
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double GetValueImpl(const std::string &key, double defaultValue) const override;
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std::string GetValueImpl(const std::string &key, const std::string &defaultValue) const override;
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private:
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bool EnsureInitialized() const;
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};
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@@ -0,0 +1,63 @@
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#pragma once
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#include "../IPersistenceManager.h"
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#include <SDL3/SDL.h>
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#include <unordered_map>
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#include <variant>
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class PersistenceManager final : public IPersistenceManager {
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public:
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using ValueType = std::variant<
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bool,
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int,
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float,
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double,
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std::string
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>;
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private:
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std::unordered_map<std::string, ValueType> m_data;
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std::string m_filename;
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public:
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explicit PersistenceManager(std::string filename = "settings.dat");
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~PersistenceManager() override;
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[[nodiscard]] bool HasKey(const std::string& key) const override;
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void RemoveKey(const std::string& key) override;
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void Clear() override;
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[[nodiscard]] size_t GetKeyCount() const override { return m_data.size(); }
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bool Save() override;
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bool Load() override;
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bool SaveToFile(const std::string& filename);
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bool LoadFromFile(const std::string& filename);
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protected:
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void SetValueImpl(const std::string& key, bool value) override;
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void SetValueImpl(const std::string& key, int value) override;
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void SetValueImpl(const std::string& key, float value) override;
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void SetValueImpl(const std::string& key, double value) override;
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void SetValueImpl(const std::string& key, const std::string& value) override;
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[[nodiscard]] bool GetValueImpl(const std::string& key, bool defaultValue) const override;
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[[nodiscard]] int GetValueImpl(const std::string& key, int defaultValue) const override;
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[[nodiscard]] float GetValueImpl(const std::string& key, float defaultValue) const override;
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[[nodiscard]] double GetValueImpl(const std::string& key, double defaultValue) const override;
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[[nodiscard]] std::string GetValueImpl(const std::string& key, const std::string& defaultValue) const override;
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private:
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static bool WriteValueToStream(SDL_IOStream* stream, const ValueType& value) ;
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static bool ReadValueFromStream(SDL_IOStream* stream, ValueType& value) ;
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enum class TypeId : uint8_t {
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BOOL = 0,
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INT = 1,
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FLOAT = 2,
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DOUBLE = 3,
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STRING = 4
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};
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static TypeId GetTypeId(const ValueType& value);
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};
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