UnicodeConverter.ts

// A JS version of Python's "get" method for dicts.
function get(dict: object, key: any, plug: any) {
    if (dict.hasOwnProperty(key))
        return dict[key];
    else
        return plug;
}

function convertToUnicode(input: string): string {

    const aleph = "ꜣ",
        ayin = "ꜥ",
        yodsmall = "i͗",
        yodcap = "I͗",
        kdotsmall = "ḳ",
        kdotcap = "Ḳ",
        saccentsmall = "ś",
        saccentcap = "Ś",
        equal = "⸗";
    
    const charMap = {
        '!': 'H',
        '#': 'Ḫ',
        '$': 'H̱',
        '%': 'S',
        '*': 'Ṯ',
        '+': 'Ḏ',
        '=': equal,
        '@': 'Ḥ',
        'A': aleph,
        '&': 'T',
        'C': saccentcap,
        'D': 'ḏ',
        'H': 'ḥ',
        'I': yodcap,
        'O': 'Q',
        'Q': kdotcap,
        'S': 'š',
        'T': 'ṯ',
        'V': 'h̭',
        'X': 'ẖ',
        '^': 'Š',
        '_': 'D',
        'a': ayin,
        'c': saccentsmall,
        'i': yodsmall,
        'o': 'q',
        'q': kdotsmall,
        'v': 'ṱ',
        'x': 'ḫ'
    };

    return input.split('')
        .map(c => get(charMap, c, c))
        .join('');
}

function test1() {
    const input = `@tp di nsw Wsir nb +dw, nTr aA, nb AbDw,
    di.f prt-xrw (m) t Hnqt, kAw Apdw, Ss mnxt,
    xt nbt nfrt wabt anxt nTr im,
    n kA n imAxy %-n-wsrt, mAa-xrw`;
    const reference = `Ḥtp di͗ nsw Wsi͗r nb Ḏdw, nṯr ꜥꜣ, nb ꜣbḏw,
    di͗.f prt-ḫrw (m) t ḥnḳt, kꜣw ꜣpdw, šs mnḫt,
    ḫt nbt nfrt wꜥbt ꜥnḫt nṯr i͗m,
    n kꜣ n i͗mꜣḫy S-n-wsrt, mꜣꜥ-ḫrw`;
     
    const output = convertToUnicode(input);

    console.assert(output === reference);
}