function osVersionName()

in src/components/App.ts [16:61]

• 35 lines of code
• 4 McCabe index (conditional complexity)

function osVersionName(os: string): ((version: string) => string | undefined) | undefined {
    function windows_nt_10_label(version: string): string {
        const [_ntversion, build] = version.split("@", 1);
        if (parseInt(build) >= 22000) {
            return 'Windows 11';
        }
        else {
            return 'Windows 10';
        }
    }

    const OS_VERSION_NAMES: { [key: string]: { [prefix: string]: string | ((version: string) => string) } } = {
        "Mac": {
            "19.": 'macOS 10.15 "Catalina"',
            "20.": 'macOS 11 "Big Sur"',
            "21.": 'macOS 12 "Monterey"',
            "22.": 'macOS 13 "Ventura"',
            "23.": 'macOS 14 "Sonoma"',
            "24.": 'macOS 15 "Sequoia"',
        },
        "Windows": {
            "5.1": 'Windows XP',
            "5.2": 'Windows XP',
            "6.0": 'Windows Vista',
            "6.1": 'Windows 7',
            "6.2": 'Windows 8',
            "6.3": 'Windows 8.1',
            "10.0": windows_nt_10_label
        },
    };

    if (os in OS_VERSION_NAMES) {
        const names = Object.entries(OS_VERSION_NAMES[os]);
        return (version: string) => {
            const match = names.find(([k, _]) => version.startsWith(k));
            if (match) {
                const name = match[1];
                if (typeof name == "string") {
                    return name;
                } else {
                    return name(version);
                }
            }
        };
    }
}