DistroUtils.hpp

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/*
 * BastionGuard™
 * Copyright (C) 2025–2026 Calogero Scarnà
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, version 3.
 */
 
#pragma once
 
#include <algorithm>
#include <cctype>
#include <fstream>
#include <string>
#include <unordered_map>
 
namespace BastionGuard::Platform {
 
    inline std::string normalize_os_release_value(std::string value) {
        if (value.size() >= 2 && value.front() == '"' && value.back() == '"') {
            value = value.substr(1, value.size() - 2);
        }
 
        std::transform(
            value.begin(),
                       value.end(),
                       value.begin(),
                       [](unsigned char c) {
                           return static_cast<char>(std::tolower(c));
                       }
        );
 
        return value;
    }
 
    inline std::unordered_map<std::string, std::string> read_os_release() {
        std::unordered_map<std::string, std::string> values;
 
        std::ifstream input("/etc/os-release");
        std::string line;
 
        while (std::getline(input, line)) {
            if (line.empty() || line.front() == '#') {
                continue;
            }
 
            const auto separator = line.find('=');
            if (separator == std::string::npos) {
                continue;
            }
 
            values[line.substr(0, separator)] =
            normalize_os_release_value(line.substr(separator + 1));
        }
 
        return values;
    }
 
    inline std::string distribution_id() {
        const auto values = read_os_release();
        const auto iterator = values.find("ID");
 
        if (iterator == values.end()) {
            return {};
        }
 
        return iterator->second;
    }
 
    inline bool is_fedora_rhel_family() {
        const std::string id = distribution_id();
 
        return id == "fedora" ||
        id == "rhel" ||
        id == "redhat" ||
        id == "centos" ||
        id == "almalinux" ||
        id == "alma" ||
        id == "rocky" ||
        id == "rockylinux" ||
        id == "ol";
    }
 
    inline bool is_ubuntu_family() {
        const std::string id = distribution_id();
 
        return id == "ubuntu" ||
               id == "linuxmint";
    }
 
    inline bool is_mageia() {
        return distribution_id() == "mageia";
    }
 
    inline bool is_openmandriva() {
        const std::string id = distribution_id();
 
        return id == "openmandriva" ||
               id == "openmandriva_lx";
    }
 
    inline bool is_opensuse() {
        const std::string id = distribution_id();
 
        return id == "opensuse-leap" ||
               id == "opensuse-tumbleweed" ||
               id == "opensuse";
    }
 
    /*
     * Il daemon CEF e l'installazione della CA di sistema sono disabilitati
     * su Fedora/RHEL, Ubuntu, Linux Mint, Mageia, OpenMandriva e openSUSE.
     *
     * Debian non viene incluso.
     */
    inline bool cef_daemon_supported() {
        return !is_fedora_rhel_family() &&
               !is_ubuntu_family() &&
               !is_mageia() &&
               !is_openmandriva() &&
               !is_opensuse();
    }
 
    #ifndef BASTIONGUARD_HAS_EMBEDDED_CEF
    #define BASTIONGUARD_HAS_EMBEDDED_CEF 1
    #endif
 
    #ifndef BASTIONGUARD_HAS_CEF_DAEMON
    #define BASTIONGUARD_HAS_CEF_DAEMON 1
    #endif
 
    /*
     * CEF embedded:
     * Secure Browser, Bank GUI, Bank Opener e Secure Payments.
     *
     * Non dipende dalla distribuzione.
     */
    inline bool cef_available() {
        return BASTIONGUARD_HAS_EMBEDDED_CEF != 0;
    }
 
    /*
     * Solo daemon proxy CEF e funzionalità collegate alla CA.
     */
    inline bool cef_daemon_available() {
        return BASTIONGUARD_HAS_CEF_DAEMON != 0 &&
        cef_daemon_supported();
    }
 
} // namespace BastionGuard::Platform