new persistence manager component

Signed-off-by: Peter Siegmund <developer@mars3142.org>
2025-06-23 23:10:42 +02:00
parent c6f0c4572d
commit 0c8c831eea
16 changed files with 92 additions and 119 deletions
--- a/components/persistence-manager/include/hal_native/PersistenceManager.h
+++ b/components/persistence-manager/include/hal_native/PersistenceManager.h
@@ -0,0 +1,63 @@
+#pragma once
+
+#include "../IPersistenceManager.h"
+#include <SDL3/SDL.h>
+#include <unordered_map>
+#include <variant>
+
+class PersistenceManager final : public IPersistenceManager {
+public:
+    using ValueType = std::variant<
+        bool,
+        int,
+        float,
+        double,
+        std::string
+    >;
+
+private:
+    std::unordered_map<std::string, ValueType> m_data;
+    std::string m_filename;
+
+public:
+    explicit PersistenceManager(std::string  filename = "settings.dat");
+    ~PersistenceManager() override;
+
+    [[nodiscard]] bool HasKey(const std::string& key) const override;
+    void RemoveKey(const std::string& key) override;
+    void Clear() override;
+    [[nodiscard]] size_t GetKeyCount() const override { return m_data.size(); }
+
+    bool Save() override;
+    bool Load() override;
+
+    bool SaveToFile(const std::string& filename);
+    bool LoadFromFile(const std::string& filename);
+
+protected:
+    void SetValueImpl(const std::string& key, bool value) override;
+    void SetValueImpl(const std::string& key, int value) override;
+    void SetValueImpl(const std::string& key, float value) override;
+    void SetValueImpl(const std::string& key, double value) override;
+    void SetValueImpl(const std::string& key, const std::string& value) override;
+
+    [[nodiscard]] bool GetValueImpl(const std::string& key, bool defaultValue) const override;
+    [[nodiscard]] int GetValueImpl(const std::string& key, int defaultValue) const override;
+    [[nodiscard]] float GetValueImpl(const std::string& key, float defaultValue) const override;
+    [[nodiscard]] double GetValueImpl(const std::string& key, double defaultValue) const override;
+    [[nodiscard]] std::string GetValueImpl(const std::string& key, const std::string& defaultValue) const override;
+
+private:
+    static bool WriteValueToStream(SDL_IOStream* stream, const ValueType& value) ;
+    static bool ReadValueFromStream(SDL_IOStream* stream, ValueType& value) ;
+
+    enum class TypeId : uint8_t {
+        BOOL = 0,
+        INT = 1,
+        FLOAT = 2,
+        DOUBLE = 3,
+        STRING = 4
+    };
+
+    static TypeId GetTypeId(const ValueType& value);
+};