1 files changed, 211 insertions, 0 deletions

diff --git a/src/frontend_common/config.h b/src/frontend_common/config.h
new file mode 100644
index 000000000..b3812af17
--- /dev/null
+++ b/src/frontend_common/config.h
@@ -0,0 +1,211 @@
+// SPDX-FileCopyrightText: 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <memory>
+#include <string>
+#include "common/settings.h"
+
+#define SI_NO_CONVERSION
+#include <SimpleIni.h>
+#include <boost/algorithm/string/replace.hpp>
+
+// Workaround for conflicting definition in libloaderapi.h caused by SimpleIni
+#undef LoadString
+#undef CreateFile
+#undef DeleteFile
+#undef CopyFile
+#undef CreateDirectory
+#undef MoveFile
+
+namespace Core {
+class System;
+}
+
+class Config {
+public:
+    enum class ConfigType {
+        GlobalConfig,
+        PerGameConfig,
+        InputProfile,
+    };
+
+    virtual ~Config() = default;
+
+    void ClearControlPlayerValues() const;
+
+    [[nodiscard]] const std::string& GetConfigFilePath() const;
+
+    [[nodiscard]] bool Exists(const std::string& section, const std::string& key) const;
+
+protected:
+    explicit Config(ConfigType config_type = ConfigType::GlobalConfig);
+
+    void Initialize(const std::string& config_name = "config");
+    void Initialize(std::optional<std::string> config_path);
+
+    void WriteToIni() const;
+
+    void SetUpIni();
+    [[nodiscard]] bool IsCustomConfig() const;
+
+    void Reload();
+    void Save();
+
+    /**
+     * Derived config classes must implement this so they can reload all platform-specific
+     * values and global ones.
+     */
+    virtual void ReloadAllValues() = 0;
+
+    /**
+     * Derived config classes must implement this so they can save all platform-specific
+     * and global values.
+     */
+    virtual void SaveAllValues() = 0;
+
+    void ReadValues();
+    void ReadPlayerValues(std::size_t player_index);
+
+    void ReadTouchscreenValues();
+    void ReadMotionTouchValues();
+
+    // Read functions bases off the respective config section names.
+    void ReadAudioValues();
+    void ReadControlValues();
+    void ReadCoreValues();
+    void ReadDataStorageValues();
+    void ReadDebuggingValues();
+    void ReadServiceValues();
+    void ReadDisabledAddOnValues();
+    void ReadMiscellaneousValues();
+    void ReadCpuValues();
+    void ReadRendererValues();
+    void ReadScreenshotValues();
+    void ReadSystemValues();
+    void ReadWebServiceValues();
+    void ReadNetworkValues();
+
+    // Read platform specific sections
+    virtual void ReadHidbusValues() = 0;
+    virtual void ReadDebugControlValues() = 0;
+    virtual void ReadPathValues() = 0;
+    virtual void ReadShortcutValues() = 0;
+    virtual void ReadUIValues() = 0;
+    virtual void ReadUIGamelistValues() = 0;
+    virtual void ReadUILayoutValues() = 0;
+    virtual void ReadMultiplayerValues() = 0;
+
+    void SaveValues();
+    void SavePlayerValues(std::size_t player_index);
+    void SaveTouchscreenValues();
+    void SaveMotionTouchValues();
+
+    // Save functions based off the respective config section names.
+    void SaveAudioValues();
+    void SaveControlValues();
+    void SaveCoreValues();
+    void SaveDataStorageValues();
+    void SaveDebuggingValues();
+    void SaveNetworkValues();
+    void SaveDisabledAddOnValues();
+    void SaveMiscellaneousValues();
+    void SaveCpuValues();
+    void SaveRendererValues();
+    void SaveScreenshotValues();
+    void SaveSystemValues();
+    void SaveWebServiceValues();
+
+    // Save platform specific sections
+    virtual void SaveHidbusValues() = 0;
+    virtual void SaveDebugControlValues() = 0;
+    virtual void SavePathValues() = 0;
+    virtual void SaveShortcutValues() = 0;
+    virtual void SaveUIValues() = 0;
+    virtual void SaveUIGamelistValues() = 0;
+    virtual void SaveUILayoutValues() = 0;
+    virtual void SaveMultiplayerValues() = 0;
+
+    virtual std::vector<Settings::BasicSetting*>& FindRelevantList(Settings::Category category) = 0;
+
+    /**
+     * Reads a setting from the qt_config.
+     *
+     * @param key The setting's identifier
+     * @param default_value The value to use when the setting is not already present in the config
+     */
+    bool ReadBooleanSetting(const std::string& key,
+                            std::optional<bool> default_value = std::nullopt);
+    s64 ReadIntegerSetting(const std::string& key, std::optional<s64> default_value = std::nullopt);
+    u64 ReadUnsignedIntegerSetting(const std::string& key,
+                                   std::optional<u64> default_value = std::nullopt);
+    double ReadDoubleSetting(const std::string& key,
+                             std::optional<double> default_value = std::nullopt);
+    std::string ReadStringSetting(const std::string& key,
+                                  std::optional<std::string> default_value = std::nullopt);
+
+    /**
+     * Writes a setting to the qt_config.
+     *
+     * @param key The setting's idetentifier
+     * @param value Value of the setting
+     * @param default_value Default of the setting if not present in config
+     * @param use_global Specifies if the custom or global config should be in use, for custom
+     * configs
+     */
+    template <typename Type = int>
+    void WriteSetting(const std::string& key, const Type& value,
+                      const std::optional<Type>& default_value = std::nullopt,
+                      const std::optional<bool>& use_global = std::nullopt);
+    void WriteSettingInternal(const std::string& key, const std::string& value);
+
+    void ReadCategory(Settings::Category category);
+    void WriteCategory(Settings::Category category);
+    void ReadSettingGeneric(Settings::BasicSetting* setting);
+    void WriteSettingGeneric(const Settings::BasicSetting* setting);
+
+    template <typename T>
+    [[nodiscard]] std::string ToString(const T& value_) {
+        if constexpr (std::is_same_v<T, std::string>) {
+            return value_;
+        } else if constexpr (std::is_same_v<T, std::optional<u32>>) {
+            return value_.has_value() ? std::to_string(*value_) : "none";
+        } else if constexpr (std::is_same_v<T, bool>) {
+            return value_ ? "true" : "false";
+        } else if constexpr (std::is_same_v<T, u64>) {
+            return std::to_string(static_cast<u64>(value_));
+        } else {
+            return std::to_string(static_cast<s64>(value_));
+        }
+    }
+
+    void BeginGroup(const std::string& group);
+    void EndGroup();
+    std::string GetSection();
+    [[nodiscard]] std::string GetGroup() const;
+    static std::string AdjustKey(const std::string& key);
+    static std::string AdjustOutputString(const std::string& string);
+    std::string GetFullKey(const std::string& key, bool skipArrayIndex);
+    int BeginArray(const std::string& array);
+    void EndArray();
+    void SetArrayIndex(int index);
+
+    const ConfigType type;
+    std::unique_ptr<CSimpleIniA> config;
+    std::string config_loc;
+    const bool global;
+
+private:
+    inline static std::array<char, 19> special_characters = {'!', '#', '$',  '%',  '^', '&', '*',
+                                                             '|', ';', '\'', '\"', ',', '<', '.',
+                                                             '>', '?', '`',  '~',  '='};
+
+    struct ConfigArray {
+        std::string name;
+        int size;
+        int index;
+    };
+    std::vector<ConfigArray> array_stack;
+    std::vector<std::string> key_stack;
+};