citron/src/core/hle/service/ngc/ngc.cpp

// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later

#include "common/string_util.h"
#include "core/core.h"
#include "core/hle/service/ipc_helpers.h"
#include "core/hle/service/ngc/ngc.h"
#include "core/hle/service/server_manager.h"
#include "core/hle/service/service.h"

namespace Service::NGC {

class NgctServiceImpl final : public ServiceFramework<NgctServiceImpl> {
public:
    explicit NgctServiceImpl(Core::System& system_) : ServiceFramework{system_, "ngct:u"} {
        // clang-format off
        static const FunctionInfo functions[] = {
            {0, &NgctServiceImpl::Match, "Match"},
            {1, &NgctServiceImpl::Filter, "Filter"},
        };
        // clang-format on

        RegisterHandlers(functions);
    }

private:
    void Match(HLERequestContext& ctx) {
        const auto buffer = ctx.ReadBuffer();
        const auto text = Common::StringFromFixedZeroTerminatedBuffer(
            reinterpret_cast<const char*>(buffer.data()), buffer.size());

        LOG_WARNING(Service_NGC, "(STUBBED) called, text={}", text);

        IPC::ResponseBuilder rb{ctx, 3};
        rb.Push(ResultSuccess);
        // Return false since we don't censor anything
        rb.Push(false);
    }

    void Filter(HLERequestContext& ctx) {
        const auto buffer = ctx.ReadBuffer();
        const auto text = Common::StringFromFixedZeroTerminatedBuffer(
            reinterpret_cast<const char*>(buffer.data()), buffer.size());

        LOG_WARNING(Service_NGC, "(STUBBED) called, text={}", text);

        // Return the same string since we don't censor anything
        ctx.WriteBuffer(buffer);

        IPC::ResponseBuilder rb{ctx, 2};
        rb.Push(ResultSuccess);
    }
};

class NgcServiceImpl final : public ServiceFramework<NgcServiceImpl> {
public:
    explicit NgcServiceImpl(Core::System& system_) : ServiceFramework(system_, "ngc:u") {
        // clang-format off
        static const FunctionInfo functions[] = {
            {0, &NgcServiceImpl::GetContentVersion, "GetContentVersion"},
            {1, &NgcServiceImpl::Check, "Check"},
            {2, &NgcServiceImpl::Mask, "Mask"},
            {3, &NgcServiceImpl::Reload, "Reload"},
        };
        // clang-format on

        RegisterHandlers(functions);
    }

private:
    static constexpr u32 NgcContentVersion = 1;

    // This is nn::ngc::detail::ProfanityFilterOption
    struct ProfanityFilterOption {
        INSERT_PADDING_BYTES_NOINIT(0x20);
    };
    static_assert(sizeof(ProfanityFilterOption) == 0x20,
                  "ProfanityFilterOption has incorrect size");

    void GetContentVersion(HLERequestContext& ctx) {
        LOG_INFO(Service_NGC, "(STUBBED) called");

        // This calls nn::ngc::ProfanityFilter::GetContentVersion
        const u32 version = NgcContentVersion;

        IPC::ResponseBuilder rb{ctx, 3};
        rb.Push(ResultSuccess);
        rb.Push(version);
    }

    void Check(HLERequestContext& ctx) {
        LOG_INFO(Service_NGC, "(STUBBED) called");

        struct InputParameters {
            u32 flags;
            ProfanityFilterOption option;
        };

        IPC::RequestParser rp{ctx};
        [[maybe_unused]] const auto params = rp.PopRaw<InputParameters>();
        [[maybe_unused]] const auto input = ctx.ReadBuffer(0);

        // This calls nn::ngc::ProfanityFilter::CheckProfanityWords
        const u32 out_flags = 0;

        IPC::ResponseBuilder rb{ctx, 3};
        rb.Push(ResultSuccess);
        rb.Push(out_flags);
    }

    void Mask(HLERequestContext& ctx) {
        LOG_INFO(Service_NGC, "(STUBBED) called");

        struct InputParameters {
            u32 flags;
            ProfanityFilterOption option;
        };

        IPC::RequestParser rp{ctx};
        [[maybe_unused]] const auto params = rp.PopRaw<InputParameters>();
        const auto input = ctx.ReadBuffer(0);

        // This calls nn::ngc::ProfanityFilter::MaskProfanityWordsInText
        const u32 out_flags = 0;
        ctx.WriteBuffer(input);

        IPC::ResponseBuilder rb{ctx, 3};
        rb.Push(ResultSuccess);
        rb.Push(out_flags);
    }

    void Reload(HLERequestContext& ctx) {
        LOG_INFO(Service_NGC, "(STUBBED) called");

        // This reloads the database.

        IPC::ResponseBuilder rb{ctx, 2};
        rb.Push(ResultSuccess);
    }
};

void LoopProcess(Core::System& system) {
    auto server_manager = std::make_unique<ServerManager>(system);

    // Note: In firmware 21.0.0+, the ngct sysmodule is stubbed and ngct:u service was moved into ngc.
    // We keep both services registered for backward compatibility with older firmware versions.
    server_manager->RegisterNamedService("ngct:u", std::make_shared<NgctServiceImpl>(system));
    server_manager->RegisterNamedService("ngc:u", std::make_shared<NgcServiceImpl>(system));
    ServerManager::RunServer(std::move(server_manager));
}

} // namespace Service::NGC