function convertLineBreaks(string) {
    return string.replace(/\n/g, '\\\\');
};

export function brief(options) {

    const {
        template = 'brief-fam',
        subject = '',
        yourRef = '',
        yourRefName = 'Ihr Zeichen',
        yourMail = '',
        myRef = '',
        customer = '',
        invoice = '',
        date = '\\today',
        signature = '',
        specialMail = '',
        address = 'Max Mustermann\\\\Musterstrasse\\\\12345 Musterstadt',
        opening = 'Sehr geehrte Damen und Herren',
        body = '',
        closing = 'Mit freundlichen Grüßen',
        ps = '',
        enclosing = '',
    } = options;

    return `% brief document
\\documentclass{scrlttr2}
\\LoadLetterOption{${template}}

\\setkomavar{subject}{${subject}}

\\setkomavar{yourref}[${yourRefName}]{${yourRef}}
\\setkomavar{yourmail}{${yourMail}}
\\setkomavar{myref}{${myRef}}
\\setkomavar{customer}{${customer}}
\\setkomavar{invoice}{${invoice}}

\\setkomavar{date}{${date}}

%\\setkomavar{signature}{${signature}}

\\setkomavar{specialmail}{${specialMail}}

\\begin{document}
\\begin{letter}{${convertLineBreaks(address)}}

    \\opening{${opening},}

    ${convertLineBreaks(body)}

    \\closing{${closing}}

    \\ps{${ps}}

    %\\encl{${enclosing}}

\\end{letter}
\\end{document}`;
};