src/utils.hpp

// SPDX-License-Identifier: Apache-2.0
// SPDX-FileCopyrightText: Copyright 2017 Intel Corporation

#pragma once

#include <boost/container/flat_map.hpp>
#include <nlohmann/json.hpp>
#include <sdbusplus/asio/connection.hpp>
#include <sdbusplus/exception.hpp>

#include <charconv>
#include <filesystem>

using DBusValueVariant =
    std::variant<std::string, int64_t, uint64_t, double, int32_t, uint32_t,
                 int16_t, uint16_t, uint8_t, bool, std::vector<uint8_t>>;
using DBusInterface = boost::container::flat_map<std::string, DBusValueVariant>;
using DBusObject = boost::container::flat_map<std::string, DBusInterface>;
using MapperGetSubTreeResponse =
    boost::container::flat_map<std::string, DBusObject>;
using FirstIndex = size_t;
using LastIndex = size_t;

bool findFiles(const std::filesystem::path& dirPath,
               const std::string& matchString,
               std::vector<std::filesystem::path>& foundPaths);
bool findFiles(const std::vector<std::filesystem::path>&& dirPaths,
               const std::string& matchString,
               std::vector<std::filesystem::path>& foundPaths);

bool getI2cDevicePaths(
    const std::filesystem::path& dirPath,
    boost::container::flat_map<size_t, std::filesystem::path>& busPaths);

struct DBusInternalError final : public sdbusplus::exception_t
{
    const char* name() const noexcept override
    {
        return "org.freedesktop.DBus.Error.Failed";
    }
    const char* description() const noexcept override
    {
        return "internal error";
    }
    const char* what() const noexcept override
    {
        return "org.freedesktop.DBus.Error.Failed: "
               "internal error";
    }

    int get_errno() const noexcept override
    {
        return EACCES;
    }
};

inline bool deviceHasLogging(const nlohmann::json& json)
{
    auto logging = json.find("Logging");
    if (logging != json.end())
    {
        const auto* ptr = logging->get_ptr<const std::string*>();
        if (ptr != nullptr)
        {
            if (*ptr == "Off")
            {
                return false;
            }
        }
    }
    return true;
}

/// \brief Match a Dbus property against a probe statement.
/// \param probe the probe statement to match against.
/// \param dbusValue the property value being matched to a probe.
/// \return true if the dbusValue matched the probe otherwise false.
bool matchProbe(const nlohmann::json& probe, const DBusValueVariant& dbusValue);

inline char asciiToLower(char c)
{
    // Converts a character to lower case without relying on std::locale
    if ('A' <= c && c <= 'Z')
    {
        c -= static_cast<char>('A' - 'a');
    }
    return c;
}

template <typename T>
auto iFindFirst(T&& str, std::string_view sub)
{
    return std::ranges::search(str, sub, [](char a, char b) {
        return asciiToLower(a) == asciiToLower(b);
    });
}

template <typename T>
std::from_chars_result fromCharsWrapper(const std::string_view& str, T& out,
                                        bool& fullMatch, int base = 10)
{
    auto result = std::from_chars(
        str.data(), std::next(str.begin(), str.size()), out, base);

    fullMatch = result.ptr == std::next(str.begin(), str.size());

    return result;
}