3 files changed, 1147 insertions, 0 deletions

diff --git a/src/frontend_common/CMakeLists.txt b/src/frontend_common/CMakeLists.txt
new file mode 100644
index 000000000..1537271fc
--- /dev/null
+++ b/src/frontend_common/CMakeLists.txt
@@ -0,0 +1,10 @@
+# SPDX-FileCopyrightText: 2023 yuzu Emulator Project
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+add_library(frontend_common STATIC
+    config.cpp
+    config.h
+)
+
+create_target_directory_groups(frontend_common)
+target_link_libraries(frontend_common PUBLIC core SimpleIni PRIVATE common Boost::headers)
diff --git a/src/frontend_common/config.cpp b/src/frontend_common/config.cpp
new file mode 100644
index 000000000..d317d81fd
--- /dev/null
+++ b/src/frontend_common/config.cpp
@@ -0,0 +1,931 @@
+// SPDX-FileCopyrightText: 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <algorithm>
+#include <array>
+#include "common/fs/fs.h"
+#include "common/fs/path_util.h"
+#include "common/settings.h"
+#include "common/settings_common.h"
+#include "common/settings_enums.h"
+#include "config.h"
+#include "core/core.h"
+#include "core/hle/service/acc/profile_manager.h"
+#include "core/hle/service/hid/controllers/npad.h"
+#include "network/network.h"
+
+#include <boost/algorithm/string/replace.hpp>
+
+namespace FS = Common::FS;
+
+Config::Config(const ConfigType config_type)
+    : type(config_type), global{config_type == ConfigType::GlobalConfig} {}
+
+void Config::Initialize(const std::string& config_name) {
+    const std::filesystem::path fs_config_loc = FS::GetYuzuPath(FS::YuzuPath::ConfigDir);
+    const auto config_file = fmt::format("{}.ini", config_name);
+
+    switch (type) {
+    case ConfigType::GlobalConfig:
+        config_loc = FS::PathToUTF8String(fs_config_loc / config_file);
+        void(FS::CreateParentDir(config_loc));
+        SetUpIni();
+        Reload();
+        break;
+    case ConfigType::PerGameConfig:
+        config_loc = FS::PathToUTF8String(fs_config_loc / "custom" / FS::ToU8String(config_file));
+        void(FS::CreateParentDir(config_loc));
+        SetUpIni();
+        Reload();
+        break;
+    case ConfigType::InputProfile:
+        config_loc = FS::PathToUTF8String(fs_config_loc / "input" / config_file);
+        void(FS::CreateParentDir(config_loc));
+        SetUpIni();
+        break;
+    }
+}
+
+void Config::Initialize(const std::optional<std::string> config_path) {
+    const std::filesystem::path default_sdl_config_path =
+        FS::GetYuzuPath(FS::YuzuPath::ConfigDir) / "sdl2-config.ini";
+    config_loc = config_path.value_or(FS::PathToUTF8String(default_sdl_config_path));
+    void(FS::CreateParentDir(config_loc));
+    SetUpIni();
+    Reload();
+}
+
+void Config::WriteToIni() const {
+    if (const SI_Error rc = config->SaveFile(config_loc.c_str()); rc < 0) {
+        LOG_ERROR(Frontend, "Config file could not be saved!");
+    }
+}
+
+void Config::SetUpIni() {
+    config = std::make_unique<CSimpleIniA>();
+    config->SetUnicode(true);
+    config->SetSpaces(false);
+    config->LoadFile(config_loc.c_str());
+}
+
+bool Config::IsCustomConfig() const {
+    return type == ConfigType::PerGameConfig;
+}
+
+void Config::ReadPlayerValues(const std::size_t player_index) {
+    std::string player_prefix;
+    if (type != ConfigType::InputProfile) {
+        player_prefix.append("player_").append(ToString(player_index)).append("_");
+    }
+
+    auto& player = Settings::values.players.GetValue()[player_index];
+    if (IsCustomConfig()) {
+        const auto profile_name =
+            ReadStringSetting(std::string(player_prefix).append("profile_name"));
+        if (profile_name.empty()) {
+            // Use the global input config
+            player = Settings::values.players.GetValue(true)[player_index];
+            return;
+        }
+        player.profile_name = profile_name;
+    }
+
+    if (player_prefix.empty() && Settings::IsConfiguringGlobal()) {
+        const auto controller = static_cast<Settings::ControllerType>(
+            ReadIntegerSetting(std::string(player_prefix).append("type"),
+                               static_cast<u8>(Settings::ControllerType::ProController)));
+
+        if (controller == Settings::ControllerType::LeftJoycon ||
+            controller == Settings::ControllerType::RightJoycon) {
+            player.controller_type = controller;
+        }
+    } else {
+        std::string connected_key = player_prefix;
+        player.connected = ReadBooleanSetting(connected_key.append("connected"),
+                                              std::make_optional(player_index == 0));
+
+        player.controller_type = static_cast<Settings::ControllerType>(
+            ReadIntegerSetting(std::string(player_prefix).append("type"),
+                               static_cast<u8>(Settings::ControllerType::ProController)));
+
+        player.vibration_enabled = ReadBooleanSetting(
+            std::string(player_prefix).append("vibration_enabled"), std::make_optional(true));
+
+        player.vibration_strength = static_cast<int>(
+            ReadIntegerSetting(std::string(player_prefix).append("vibration_strength"), 100));
+
+        player.body_color_left = static_cast<u32>(ReadIntegerSetting(
+            std::string(player_prefix).append("body_color_left"), Settings::JOYCON_BODY_NEON_BLUE));
+        player.body_color_right = static_cast<u32>(ReadIntegerSetting(
+            std::string(player_prefix).append("body_color_right"), Settings::JOYCON_BODY_NEON_RED));
+        player.button_color_left = static_cast<u32>(
+            ReadIntegerSetting(std::string(player_prefix).append("button_color_left"),
+                               Settings::JOYCON_BUTTONS_NEON_BLUE));
+        player.button_color_right = static_cast<u32>(
+            ReadIntegerSetting(std::string(player_prefix).append("button_color_right"),
+                               Settings::JOYCON_BUTTONS_NEON_RED));
+    }
+}
+
+void Config::ReadTouchscreenValues() {
+    Settings::values.touchscreen.enabled =
+        ReadBooleanSetting(std::string("touchscreen_enabled"), std::make_optional(true));
+    Settings::values.touchscreen.rotation_angle =
+        static_cast<u32>(ReadIntegerSetting(std::string("touchscreen_angle"), 0));
+    Settings::values.touchscreen.diameter_x =
+        static_cast<u32>(ReadIntegerSetting(std::string("touchscreen_diameter_x"), 15));
+    Settings::values.touchscreen.diameter_y =
+        static_cast<u32>(ReadIntegerSetting(std::string("touchscreen_diameter_y"), 15));
+}
+
+void Config::ReadAudioValues() {
+    BeginGroup(Settings::TranslateCategory(Settings::Category::Audio));
+
+    ReadCategory(Settings::Category::Audio);
+    ReadCategory(Settings::Category::UiAudio);
+
+    EndGroup();
+}
+
+void Config::ReadControlValues() {
+    BeginGroup(Settings::TranslateCategory(Settings::Category::Controls));
+
+    ReadCategory(Settings::Category::Controls);
+
+    Settings::values.players.SetGlobal(!IsCustomConfig());
+    for (std::size_t p = 0; p < Settings::values.players.GetValue().size(); ++p) {
+        ReadPlayerValues(p);
+    }
+
+    // Disable docked mode if handheld is selected
+    const auto controller_type = Settings::values.players.GetValue()[0].controller_type;
+    if (controller_type == Settings::ControllerType::Handheld) {
+        Settings::values.use_docked_mode.SetGlobal(!IsCustomConfig());
+        Settings::values.use_docked_mode.SetValue(Settings::ConsoleMode::Handheld);
+    }
+
+    if (IsCustomConfig()) {
+        EndGroup();
+        return;
+    }
+    ReadTouchscreenValues();
+    ReadMotionTouchValues();
+
+    EndGroup();
+}
+
+void Config::ReadMotionTouchValues() {
+    int num_touch_from_button_maps = BeginArray(std::string("touch_from_button_maps"));
+
+    if (num_touch_from_button_maps > 0) {
+        for (int i = 0; i < num_touch_from_button_maps; ++i) {
+            SetArrayIndex(i);
+
+            Settings::TouchFromButtonMap map;
+            map.name = ReadStringSetting(std::string("name"), std::string("default"));
+
+            const int num_touch_maps = BeginArray(std::string("entries"));
+            map.buttons.reserve(num_touch_maps);
+            for (int j = 0; j < num_touch_maps; j++) {
+                SetArrayIndex(j);
+                std::string touch_mapping = ReadStringSetting(std::string("bind"));
+                map.buttons.emplace_back(std::move(touch_mapping));
+            }
+            EndArray(); // entries
+            Settings::values.touch_from_button_maps.emplace_back(std::move(map));
+        }
+    } else {
+        Settings::values.touch_from_button_maps.emplace_back(
+            Settings::TouchFromButtonMap{"default", {}});
+        num_touch_from_button_maps = 1;
+    }
+    EndArray(); // touch_from_button_maps
+
+    Settings::values.touch_from_button_map_index = std::clamp(
+        Settings::values.touch_from_button_map_index.GetValue(), 0, num_touch_from_button_maps - 1);
+}
+
+void Config::ReadCoreValues() {
+    BeginGroup(Settings::TranslateCategory(Settings::Category::Core));
+
+    ReadCategory(Settings::Category::Core);
+
+    EndGroup();
+}
+
+void Config::ReadDataStorageValues() {
+    BeginGroup(Settings::TranslateCategory(Settings::Category::DataStorage));
+
+    FS::SetYuzuPath(FS::YuzuPath::NANDDir, ReadStringSetting(std::string("nand_directory")));
+    FS::SetYuzuPath(FS::YuzuPath::SDMCDir, ReadStringSetting(std::string("sdmc_directory")));
+    FS::SetYuzuPath(FS::YuzuPath::LoadDir, ReadStringSetting(std::string("load_directory")));
+    FS::SetYuzuPath(FS::YuzuPath::DumpDir, ReadStringSetting(std::string("dump_directory")));
+    FS::SetYuzuPath(FS::YuzuPath::TASDir, ReadStringSetting(std::string("tas_directory")));
+
+    ReadCategory(Settings::Category::DataStorage);
+
+    EndGroup();
+}
+
+void Config::ReadDebuggingValues() {
+    BeginGroup(Settings::TranslateCategory(Settings::Category::Debugging));
+
+    // Intentionally not using the QT default setting as this is intended to be changed in the ini
+    Settings::values.record_frame_times =
+        ReadBooleanSetting(std::string("record_frame_times"), std::make_optional(false));
+
+    ReadCategory(Settings::Category::Debugging);
+    ReadCategory(Settings::Category::DebuggingGraphics);
+
+    EndGroup();
+}
+
+void Config::ReadServiceValues() {
+    BeginGroup(Settings::TranslateCategory(Settings::Category::Services));
+
+    ReadCategory(Settings::Category::Services);
+
+    EndGroup();
+}
+
+void Config::ReadDisabledAddOnValues() {
+    // Custom config section
+    BeginGroup(std::string("DisabledAddOns"));
+
+    const int size = BeginArray(std::string(""));
+    for (int i = 0; i < size; ++i) {
+        SetArrayIndex(i);
+        const auto title_id = ReadIntegerSetting(std::string("title_id"), 0);
+        std::vector<std::string> out;
+        const int d_size = BeginArray("disabled");
+        for (int j = 0; j < d_size; ++j) {
+            SetArrayIndex(j);
+            out.push_back(ReadStringSetting(std::string("d"), std::string("")));
+        }
+        EndArray(); // d
+        Settings::values.disabled_addons.insert_or_assign(title_id, out);
+    }
+    EndArray(); // Base disabled addons array - Has no base key
+
+    EndGroup();
+}
+
+void Config::ReadMiscellaneousValues() {
+    BeginGroup(Settings::TranslateCategory(Settings::Category::Miscellaneous));
+
+    ReadCategory(Settings::Category::Miscellaneous);
+
+    EndGroup();
+}
+
+void Config::ReadCpuValues() {
+    BeginGroup(Settings::TranslateCategory(Settings::Category::Cpu));
+
+    ReadCategory(Settings::Category::Cpu);
+    ReadCategory(Settings::Category::CpuDebug);
+    ReadCategory(Settings::Category::CpuUnsafe);
+
+    EndGroup();
+}
+
+void Config::ReadRendererValues() {
+    BeginGroup(Settings::TranslateCategory(Settings::Category::Renderer));
+
+    ReadCategory(Settings::Category::Renderer);
+    ReadCategory(Settings::Category::RendererAdvanced);
+    ReadCategory(Settings::Category::RendererDebug);
+
+    EndGroup();
+}
+
+void Config::ReadScreenshotValues() {
+    BeginGroup(Settings::TranslateCategory(Settings::Category::Screenshots));
+
+    ReadCategory(Settings::Category::Screenshots);
+    FS::SetYuzuPath(FS::YuzuPath::ScreenshotsDir,
+                    ReadStringSetting(std::string("screenshot_path"),
+                                      FS::GetYuzuPathString(FS::YuzuPath::ScreenshotsDir)));
+
+    EndGroup();
+}
+
+void Config::ReadSystemValues() {
+    BeginGroup(Settings::TranslateCategory(Settings::Category::System));
+
+    ReadCategory(Settings::Category::System);
+    ReadCategory(Settings::Category::SystemAudio);
+
+    EndGroup();
+}
+
+void Config::ReadWebServiceValues() {
+    BeginGroup(Settings::TranslateCategory(Settings::Category::WebService));
+
+    ReadCategory(Settings::Category::WebService);
+
+    EndGroup();
+}
+
+void Config::ReadNetworkValues() {
+    BeginGroup(Settings::TranslateCategory(Settings::Category::Services));
+
+    ReadCategory(Settings::Category::Network);
+
+    EndGroup();
+}
+
+void Config::ReadValues() {
+    if (global) {
+        ReadDataStorageValues();
+        ReadDebuggingValues();
+        ReadDisabledAddOnValues();
+        ReadNetworkValues();
+        ReadServiceValues();
+        ReadWebServiceValues();
+        ReadMiscellaneousValues();
+    }
+    ReadControlValues();
+    ReadCoreValues();
+    ReadCpuValues();
+    ReadRendererValues();
+    ReadAudioValues();
+    ReadSystemValues();
+}
+
+void Config::SavePlayerValues(const std::size_t player_index) {
+    std::string player_prefix;
+    if (type != ConfigType::InputProfile) {
+        player_prefix = std::string("player_").append(ToString(player_index)).append("_");
+    }
+
+    const auto& player = Settings::values.players.GetValue()[player_index];
+    if (IsCustomConfig()) {
+        if (player.profile_name.empty()) {
+            // No custom profile selected
+            return;
+        }
+        WriteSetting(std::string(player_prefix).append("profile_name"), player.profile_name,
+                     std::make_optional(std::string("")));
+    }
+
+    WriteSetting(std::string(player_prefix).append("type"), static_cast<u8>(player.controller_type),
+                 std::make_optional(static_cast<u8>(Settings::ControllerType::ProController)));
+
+    if (!player_prefix.empty() || !Settings::IsConfiguringGlobal()) {
+        WriteSetting(std::string(player_prefix).append("connected"), player.connected,
+                     std::make_optional(player_index == 0));
+        WriteSetting(std::string(player_prefix).append("vibration_enabled"),
+                     player.vibration_enabled, std::make_optional(true));
+        WriteSetting(std::string(player_prefix).append("vibration_strength"),
+                     player.vibration_strength, std::make_optional(100));
+        WriteSetting(std::string(player_prefix).append("body_color_left"), player.body_color_left,
+                     std::make_optional(Settings::JOYCON_BODY_NEON_BLUE));
+        WriteSetting(std::string(player_prefix).append("body_color_right"), player.body_color_right,
+                     std::make_optional(Settings::JOYCON_BODY_NEON_RED));
+        WriteSetting(std::string(player_prefix).append("button_color_left"),
+                     player.button_color_left,
+                     std::make_optional(Settings::JOYCON_BUTTONS_NEON_BLUE));
+        WriteSetting(std::string(player_prefix).append("button_color_right"),
+                     player.button_color_right,
+                     std::make_optional(Settings::JOYCON_BUTTONS_NEON_RED));
+    }
+}
+
+void Config::SaveTouchscreenValues() {
+    const auto& touchscreen = Settings::values.touchscreen;
+
+    WriteSetting(std::string("touchscreen_enabled"), touchscreen.enabled, std::make_optional(true));
+
+    WriteSetting(std::string("touchscreen_angle"), touchscreen.rotation_angle,
+                 std::make_optional(static_cast<u32>(0)));
+    WriteSetting(std::string("touchscreen_diameter_x"), touchscreen.diameter_x,
+                 std::make_optional(static_cast<u32>(15)));
+    WriteSetting(std::string("touchscreen_diameter_y"), touchscreen.diameter_y,
+                 std::make_optional(static_cast<u32>(15)));
+}
+
+void Config::SaveMotionTouchValues() {
+    BeginArray(std::string("touch_from_button_maps"));
+    for (std::size_t p = 0; p < Settings::values.touch_from_button_maps.size(); ++p) {
+        SetArrayIndex(static_cast<int>(p));
+        WriteSetting(std::string("name"), Settings::values.touch_from_button_maps[p].name,
+                     std::make_optional(std::string("default")));
+
+        BeginArray(std::string("entries"));
+        for (std::size_t q = 0; q < Settings::values.touch_from_button_maps[p].buttons.size();
+             ++q) {
+            SetArrayIndex(static_cast<int>(q));
+            WriteSetting(std::string("bind"),
+                         Settings::values.touch_from_button_maps[p].buttons[q]);
+        }
+        EndArray(); // entries
+    }
+    EndArray(); // touch_from_button_maps
+}
+
+void Config::SaveValues() {
+    if (global) {
+        SaveDataStorageValues();
+        SaveDebuggingValues();
+        SaveDisabledAddOnValues();
+        SaveNetworkValues();
+        SaveWebServiceValues();
+        SaveMiscellaneousValues();
+    }
+    SaveControlValues();
+    SaveCoreValues();
+    SaveCpuValues();
+    SaveRendererValues();
+    SaveAudioValues();
+    SaveSystemValues();
+
+    WriteToIni();
+}
+
+void Config::SaveAudioValues() {
+    BeginGroup(Settings::TranslateCategory(Settings::Category::Audio));
+
+    WriteCategory(Settings::Category::Audio);
+    WriteCategory(Settings::Category::UiAudio);
+
+    EndGroup();
+}
+
+void Config::SaveControlValues() {
+    BeginGroup(Settings::TranslateCategory(Settings::Category::Controls));
+
+    WriteCategory(Settings::Category::Controls);
+
+    Settings::values.players.SetGlobal(!IsCustomConfig());
+    for (std::size_t p = 0; p < Settings::values.players.GetValue().size(); ++p) {
+        SavePlayerValues(p);
+    }
+    if (IsCustomConfig()) {
+        EndGroup();
+        return;
+    }
+    SaveTouchscreenValues();
+    SaveMotionTouchValues();
+
+    EndGroup();
+}
+
+void Config::SaveCoreValues() {
+    BeginGroup(Settings::TranslateCategory(Settings::Category::Core));
+
+    WriteCategory(Settings::Category::Core);
+
+    EndGroup();
+}
+
+void Config::SaveDataStorageValues() {
+    BeginGroup(Settings::TranslateCategory(Settings::Category::DataStorage));
+
+    WriteSetting(std::string("nand_directory"), FS::GetYuzuPathString(FS::YuzuPath::NANDDir),
+                 std::make_optional(FS::GetYuzuPathString(FS::YuzuPath::NANDDir)));
+    WriteSetting(std::string("sdmc_directory"), FS::GetYuzuPathString(FS::YuzuPath::SDMCDir),
+                 std::make_optional(FS::GetYuzuPathString(FS::YuzuPath::SDMCDir)));
+    WriteSetting(std::string("load_directory"), FS::GetYuzuPathString(FS::YuzuPath::LoadDir),
+                 std::make_optional(FS::GetYuzuPathString(FS::YuzuPath::LoadDir)));
+    WriteSetting(std::string("dump_directory"), FS::GetYuzuPathString(FS::YuzuPath::DumpDir),
+                 std::make_optional(FS::GetYuzuPathString(FS::YuzuPath::DumpDir)));
+    WriteSetting(std::string("tas_directory"), FS::GetYuzuPathString(FS::YuzuPath::TASDir),
+                 std::make_optional(FS::GetYuzuPathString(FS::YuzuPath::TASDir)));
+
+    WriteCategory(Settings::Category::DataStorage);
+
+    EndGroup();
+}
+
+void Config::SaveDebuggingValues() {
+    BeginGroup(Settings::TranslateCategory(Settings::Category::Debugging));
+
+    // Intentionally not using the QT default setting as this is intended to be changed in the ini
+    WriteSetting(std::string("record_frame_times"), Settings::values.record_frame_times);
+
+    WriteCategory(Settings::Category::Debugging);
+    WriteCategory(Settings::Category::DebuggingGraphics);
+
+    EndGroup();
+}
+
+void Config::SaveNetworkValues() {
+    BeginGroup(Settings::TranslateCategory(Settings::Category::Services));
+
+    WriteCategory(Settings::Category::Network);
+
+    EndGroup();
+}
+
+void Config::SaveDisabledAddOnValues() {
+    // Custom config section
+    BeginGroup(std::string("DisabledAddOns"));
+
+    int i = 0;
+    BeginArray(std::string(""));
+    for (const auto& elem : Settings::values.disabled_addons) {
+        SetArrayIndex(i);
+        WriteSetting(std::string("title_id"), elem.first, std::make_optional(static_cast<u64>(0)));
+        BeginArray(std::string("disabled"));
+        for (std::size_t j = 0; j < elem.second.size(); ++j) {
+            SetArrayIndex(static_cast<int>(j));
+            WriteSetting(std::string("d"), elem.second[j], std::make_optional(std::string("")));
+        }
+        EndArray(); // disabled
+        ++i;
+    }
+    EndArray(); // Base disabled addons array - Has no base key
+
+    EndGroup();
+}
+
+void Config::SaveMiscellaneousValues() {
+    BeginGroup(Settings::TranslateCategory(Settings::Category::Miscellaneous));
+
+    WriteCategory(Settings::Category::Miscellaneous);
+
+    EndGroup();
+}
+
+void Config::SaveCpuValues() {
+    BeginGroup(Settings::TranslateCategory(Settings::Category::Cpu));
+
+    WriteCategory(Settings::Category::Cpu);
+    WriteCategory(Settings::Category::CpuDebug);
+    WriteCategory(Settings::Category::CpuUnsafe);
+
+    EndGroup();
+}
+
+void Config::SaveRendererValues() {
+    BeginGroup(Settings::TranslateCategory(Settings::Category::Renderer));
+
+    WriteCategory(Settings::Category::Renderer);
+    WriteCategory(Settings::Category::RendererAdvanced);
+    WriteCategory(Settings::Category::RendererDebug);
+
+    EndGroup();
+}
+
+void Config::SaveScreenshotValues() {
+    BeginGroup(Settings::TranslateCategory(Settings::Category::Screenshots));
+
+    WriteSetting(std::string("screenshot_path"),
+                 FS::GetYuzuPathString(FS::YuzuPath::ScreenshotsDir));
+    WriteCategory(Settings::Category::Screenshots);
+
+    EndGroup();
+}
+
+void Config::SaveSystemValues() {
+    BeginGroup(Settings::TranslateCategory(Settings::Category::System));
+
+    WriteCategory(Settings::Category::System);
+    WriteCategory(Settings::Category::SystemAudio);
+
+    EndGroup();
+}
+
+void Config::SaveWebServiceValues() {
+    BeginGroup(Settings::TranslateCategory(Settings::Category::WebService));
+
+    WriteCategory(Settings::Category::WebService);
+
+    EndGroup();
+}
+
+bool Config::ReadBooleanSetting(const std::string& key, const std::optional<bool> default_value) {
+    std::string full_key = GetFullKey(key, false);
+    if (!default_value.has_value()) {
+        return config->GetBoolValue(GetSection().c_str(), full_key.c_str(), false);
+    }
+
+    if (config->GetBoolValue(GetSection().c_str(),
+                             std::string(full_key).append("\\default").c_str(), false)) {
+        return static_cast<bool>(default_value.value());
+    } else {
+        return config->GetBoolValue(GetSection().c_str(), full_key.c_str(),
+                                    static_cast<bool>(default_value.value()));
+    }
+}
+
+s64 Config::ReadIntegerSetting(const std::string& key, const std::optional<s64> default_value) {
+    std::string full_key = GetFullKey(key, false);
+    if (!default_value.has_value()) {
+        try {
+            return std::stoll(
+                std::string(config->GetValue(GetSection().c_str(), full_key.c_str(), "0")));
+        } catch (...) {
+            return 0;
+        }
+    }
+
+    s64 result = 0;
+    if (config->GetBoolValue(GetSection().c_str(),
+                             std::string(full_key).append("\\default").c_str(), true)) {
+        result = default_value.value();
+    } else {
+        try {
+            result = std::stoll(std::string(config->GetValue(
+                GetSection().c_str(), full_key.c_str(), ToString(default_value.value()).c_str())));
+        } catch (...) {
+            result = default_value.value();
+        }
+    }
+    return result;
+}
+
+double Config::ReadDoubleSetting(const std::string& key,
+                                 const std::optional<double> default_value) {
+    std::string full_key = GetFullKey(key, false);
+    if (!default_value.has_value()) {
+        return config->GetDoubleValue(GetSection().c_str(), full_key.c_str(), 0);
+    }
+
+    double result;
+    if (config->GetBoolValue(GetSection().c_str(),
+                             std::string(full_key).append("\\default").c_str(), true)) {
+        result = default_value.value();
+    } else {
+        result =
+            config->GetDoubleValue(GetSection().c_str(), full_key.c_str(), default_value.value());
+    }
+    return result;
+}
+
+std::string Config::ReadStringSetting(const std::string& key,
+                                      const std::optional<std::string> default_value) {
+    std::string result;
+    std::string full_key = GetFullKey(key, false);
+    if (!default_value.has_value()) {
+        result = config->GetValue(GetSection().c_str(), full_key.c_str(), "");
+        boost::replace_all(result, "\"", "");
+        return result;
+    }
+
+    if (config->GetBoolValue(GetSection().c_str(),
+                             std::string(full_key).append("\\default").c_str(), true)) {
+        result = default_value.value();
+    } else {
+        result =
+            config->GetValue(GetSection().c_str(), full_key.c_str(), default_value.value().c_str());
+    }
+    boost::replace_all(result, "\"", "");
+    boost::replace_all(result, "//", "/");
+    return result;
+}
+
+bool Config::Exists(const std::string& section, const std::string& key) const {
+    const std::string value = config->GetValue(section.c_str(), key.c_str(), "");
+    return !value.empty();
+}
+
+template <typename Type>
+void Config::WriteSetting(const std::string& key, const Type& value,
+                          const std::optional<Type>& default_value,
+                          const std::optional<bool>& use_global) {
+    std::string full_key = GetFullKey(key, false);
+
+    std::string saved_value;
+    std::string string_default;
+    if constexpr (std::is_same_v<Type, std::string>) {
+        saved_value.append(AdjustOutputString(value));
+        if (default_value.has_value()) {
+            string_default.append(AdjustOutputString(default_value.value()));
+        }
+    } else {
+        saved_value.append(AdjustOutputString(ToString(value)));
+        if (default_value.has_value()) {
+            string_default.append(ToString(default_value.value()));
+        }
+    }
+
+    if (default_value.has_value() && use_global.has_value()) {
+        if (!global) {
+            WriteSettingInternal(std::string(full_key).append("\\global"),
+                                 ToString(use_global.value()));
+        }
+        if (global || use_global.value() == false) {
+            WriteSettingInternal(std::string(full_key).append("\\default"),
+                                 ToString(string_default == saved_value));
+            WriteSettingInternal(full_key, saved_value);
+        }
+    } else if (default_value.has_value() && !use_global.has_value()) {
+        WriteSettingInternal(std::string(full_key).append("\\default"),
+                             ToString(string_default == saved_value));
+        WriteSettingInternal(full_key, saved_value);
+    } else {
+        WriteSettingInternal(full_key, saved_value);
+    }
+}
+
+void Config::WriteSettingInternal(const std::string& key, const std::string& value) {
+    config->SetValue(GetSection().c_str(), key.c_str(), value.c_str());
+}
+
+void Config::Reload() {
+    ReadValues();
+    // To apply default value changes
+    SaveValues();
+}
+
+void Config::Save() {
+    SaveValues();
+}
+
+void Config::ClearControlPlayerValues() const {
+    // If key is an empty string, all keys in the current group() are removed.
+    const char* section = Settings::TranslateCategory(Settings::Category::Controls);
+    CSimpleIniA::TNamesDepend keys;
+    config->GetAllKeys(section, keys);
+    for (const auto& key : keys) {
+        if (std::string(config->GetValue(section, key.pItem)).empty()) {
+            config->Delete(section, key.pItem);
+        }
+    }
+}
+
+const std::string& Config::GetConfigFilePath() const {
+    return config_loc;
+}
+
+void Config::ReadCategory(const Settings::Category category) {
+    const auto& settings = FindRelevantList(category);
+    std::ranges::for_each(settings, [&](const auto& setting) { ReadSettingGeneric(setting); });
+}
+
+void Config::WriteCategory(const Settings::Category category) {
+    const auto& settings = FindRelevantList(category);
+    std::ranges::for_each(settings, [&](const auto& setting) { WriteSettingGeneric(setting); });
+}
+
+void Config::ReadSettingGeneric(Settings::BasicSetting* const setting) {
+    if (!setting->Save() || (!setting->Switchable() && !global)) {
+        return;
+    }
+
+    const std::string key = AdjustKey(setting->GetLabel());
+    const std::string default_value(setting->DefaultToString());
+
+    bool use_global = true;
+    if (setting->Switchable() && !global) {
+        use_global =
+            ReadBooleanSetting(std::string(key).append("\\use_global"), std::make_optional(true));
+        setting->SetGlobal(use_global);
+    }
+
+    if (global || !use_global) {
+        const bool is_default =
+            ReadBooleanSetting(std::string(key).append("\\default"), std::make_optional(true));
+        if (!is_default) {
+            const std::string setting_string = ReadStringSetting(key, default_value);
+            setting->LoadString(setting_string);
+        } else {
+            // Empty string resets the Setting to default
+            setting->LoadString("");
+        }
+    }
+}
+
+void Config::WriteSettingGeneric(const Settings::BasicSetting* const setting) {
+    if (!setting->Save()) {
+        return;
+    }
+
+    std::string key = AdjustKey(setting->GetLabel());
+    if (setting->Switchable()) {
+        if (!global) {
+            WriteSetting(std::string(key).append("\\use_global"), setting->UsingGlobal());
+        }
+        if (global || !setting->UsingGlobal()) {
+            WriteSetting(std::string(key).append("\\default"),
+                         setting->ToString() == setting->DefaultToString());
+            WriteSetting(key, setting->ToString());
+        }
+    } else if (global) {
+        WriteSetting(std::string(key).append("\\default"),
+                     setting->ToString() == setting->DefaultToString());
+        WriteSetting(key, setting->ToString());
+    }
+}
+
+void Config::BeginGroup(const std::string& group) {
+    // You can't begin a group while reading/writing from a config array
+    ASSERT(array_stack.empty());
+
+    key_stack.push_back(AdjustKey(group));
+}
+
+void Config::EndGroup() {
+    // You can't end a group if you haven't started one yet
+    ASSERT(!key_stack.empty());
+
+    // You can't end a group when reading/writing from a config array
+    ASSERT(array_stack.empty());
+
+    key_stack.pop_back();
+}
+
+std::string Config::GetSection() {
+    if (key_stack.empty()) {
+        return std::string{""};
+    }
+
+    return key_stack.front();
+}
+
+std::string Config::GetGroup() const {
+    if (key_stack.size() <= 1) {
+        return std::string{""};
+    }
+
+    std::string key;
+    for (size_t i = 1; i < key_stack.size(); ++i) {
+        key.append(key_stack[i]).append("\\");
+    }
+    return key;
+}
+
+std::string Config::AdjustKey(const std::string& key) {
+    std::string adjusted_key(key);
+    boost::replace_all(adjusted_key, "/", "\\");
+    boost::replace_all(adjusted_key, " ", "%20");
+    return adjusted_key;
+}
+
+std::string Config::AdjustOutputString(const std::string& string) {
+    std::string adjusted_string(string);
+    boost::replace_all(adjusted_string, "\\", "/");
+    boost::replace_all(adjusted_string, "//", "/");
+
+    // Needed for backwards compatibility with QSettings deserialization
+    for (const auto& special_character : special_characters) {
+        if (adjusted_string.find(special_character) != std::string::npos) {
+            adjusted_string.insert(0, "\"");
+            adjusted_string.append("\"");
+            break;
+        }
+    }
+    return adjusted_string;
+}
+
+std::string Config::GetFullKey(const std::string& key, bool skipArrayIndex) {
+    if (array_stack.empty()) {
+        return std::string(GetGroup()).append(AdjustKey(key));
+    }
+
+    std::string array_key;
+    for (size_t i = 0; i < array_stack.size(); ++i) {
+        if (!array_stack[i].name.empty()) {
+            array_key.append(array_stack[i].name).append("\\");
+        }
+
+        if (!skipArrayIndex || (array_stack.size() - 1 != i && array_stack.size() > 1)) {
+            array_key.append(ToString(array_stack[i].index)).append("\\");
+        }
+    }
+    std::string final_key = std::string(GetGroup()).append(array_key).append(AdjustKey(key));
+    return final_key;
+}
+
+int Config::BeginArray(const std::string& array) {
+    array_stack.push_back(ConfigArray{AdjustKey(array), 0, 0});
+    const int size = config->GetLongValue(GetSection().c_str(),
+                                          GetFullKey(std::string("size"), true).c_str(), 0);
+    array_stack.back().size = size;
+    return size;
+}
+
+void Config::EndArray() {
+    // You can't end a config array before starting one
+    ASSERT(!array_stack.empty());
+
+    // Write out the size to config
+    if (key_stack.size() == 1 && array_stack.back().name.empty()) {
+        // Edge-case where the first array created doesn't have a name
+        config->SetValue(GetSection().c_str(), std::string("size").c_str(),
+                         ToString(array_stack.back().size).c_str());
+    } else {
+        const auto key = GetFullKey(std::string("size"), true);
+        config->SetValue(GetSection().c_str(), key.c_str(),
+                         ToString(array_stack.back().size).c_str());
+    }
+
+    array_stack.pop_back();
+}
+
+void Config::SetArrayIndex(const int index) {
+    // You can't set the array index if you haven't started one yet
+    ASSERT(!array_stack.empty());
+
+    const int array_index = index + 1;
+
+    // You can't exceed the known max size of the array by more than 1
+    ASSERT(array_stack.front().size + 1 >= array_index);
+
+    // Change the config array size to the current index since you may want
+    // to reduce the number of elements that you read back from the config
+    // in the future.
+    array_stack.back().size = array_index;
+    array_stack.back().index = array_index;
+}
diff --git a/src/frontend_common/config.h b/src/frontend_common/config.h
new file mode 100644
index 000000000..f741aa8bb
--- /dev/null
+++ b/src/frontend_common/config.h
@@ -0,0 +1,206 @@
+// SPDX-FileCopyrightText: 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <memory>
+#include <string>
+#include "common/settings.h"
+
+#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);
+    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 {
+            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;
+};