languages.js

/**
 *
 * dall-e-intl
 *
 * See https://github.com/asirihewage/dall-e-intl
 */

const languages = {
    'auto': 'Automatic',
    'af': 'Afrikaans',
    'sq': 'Albanian',
    'am': 'Amharic',
    'ar': 'Arabic',
    'hy': 'Armenian',
    'az': 'Azerbaijani',
    'eu': 'Basque',
    'be': 'Belarusian',
    'bn': 'Bengali',
    'bs': 'Bosnian',
    'bg': 'Bulgarian',
    'ca': 'Catalan',
    'ceb': 'Cebuano',
    'ny': 'Chichewa',
    'zh': 'Chinese (Simplified)',
    'zh-cn': 'Chinese (Simplified)',
    'zh-tw': 'Chinese (Traditional)',
    'co': 'Corsican',
    'hr': 'Croatian',
    'cs': 'Czech',
    'da': 'Danish',
    'nl': 'Dutch',
    'en': 'English',
    'eo': 'Esperanto',
    'et': 'Estonian',
    'tl': 'Filipino',
    'fi': 'Finnish',
    'fr': 'French',
    'fy': 'Frisian',
    'gl': 'Galician',
    'ka': 'Georgian',
    'de': 'German',
    'el': 'Greek',
    'gu': 'Gujarati',
    'ht': 'Haitian Creole',
    'ha': 'Hausa',
    'haw': 'Hawaiian',
    'he': 'Hebrew',
    'iw': 'Hebrew',
    'hi': 'Hindi',
    'hmn': 'Hmong',
    'hu': 'Hungarian',
    'is': 'Icelandic',
    'ig': 'Igbo',
    'id': 'Indonesian',
    'ga': 'Irish',
    'it': 'Italian',
    'ja': 'Japanese',
    'jw': 'Javanese',
    'kn': 'Kannada',
    'kk': 'Kazakh',
    'km': 'Khmer',
    'ko': 'Korean',
    'ku': 'Kurdish (Kurmanji)',
    'ky': 'Kyrgyz',
    'lo': 'Lao',
    'la': 'Latin',
    'lv': 'Latvian',
    'lt': 'Lithuanian',
    'lb': 'Luxembourgish',
    'mk': 'Macedonian',
    'mg': 'Malagasy',
    'ms': 'Malay',
    'ml': 'Malayalam',
    'mt': 'Maltese',
    'mi': 'Maori',
    'mr': 'Marathi',
    'mn': 'Mongolian',
    'my': 'Myanmar (Burmese)',
    'ne': 'Nepali',
    'no': 'Norwegian',
    'ps': 'Pashto',
    'fa': 'Persian',
    'pl': 'Polish',
    'pt': 'Portuguese',
    'pa': 'Punjabi',
    'ro': 'Romanian',
    'ru': 'Russian',
    'sm': 'Samoan',
    'gd': 'Scots Gaelic',
    'sr': 'Serbian',
    'st': 'Sesotho',
    'sn': 'Shona',
    'sd': 'Sindhi',
    'si': 'Sinhala',
    'sk': 'Slovak',
    'sl': 'Slovenian',
    'so': 'Somali',
    'es': 'Spanish',
    'su': 'Sundanese',
    'sw': 'Swahili',
    'sv': 'Swedish',
    'tg': 'Tajik',
    'ta': 'Tamil',
    'te': 'Telugu',
    'th': 'Thai',
    'tr': 'Turkish',
    'uk': 'Ukrainian',
    'ur': 'Urdu',
    'uz': 'Uzbek',
    'vi': 'Vietnamese',
    'cy': 'Welsh',
    'xh': 'Xhosa',
    'yi': 'Yiddish',
    'yo': 'Yoruba',
    'zu': 'Zulu'
};

/**
 * Returns the ISO 639-1 code of the desiredLang – if it is supported by Google Translate
 * @param {string} desiredLang – the name or the code of the desired language
 * @returns {string|boolean} The ISO 639-1 code of the language or false if the language is not supported
 */
function getCode(desiredLang) {
    if (!desiredLang) {
        return false;
    }
    desiredLang = desiredLang.toLowerCase();

    if (languages[desiredLang]) {
        return desiredLang;
    }

    var keys = Object.keys(languages).filter(function (key) {
        if (typeof languages[key] !== 'string') {
            return false;
        }

        return languages[key].toLowerCase() === desiredLang;
    });

    return keys[0] || false;
}

/**
 * Returns true if the desiredLang is supported by Google Translate and false otherwise
 * @param desiredLang – the ISO 639-1 code or the name of the desired language
 * @returns {boolean}
 */
export function isSupported(desiredLang) {
    return Boolean(getCode(desiredLang));
}

/**
 * Returns utf8 length
 * @param str – string
 * @returns {number}
 */
function utf8Length(str) {
    const utf8 = [];
    for (let i = 0; i < str.length; i++) {
        let charcode = str.charCodeAt(i);
        if (charcode < 0x80) utf8.push(charcode);
        else if (charcode < 0x800) {
            utf8.push(0xc0 | (charcode >> 6),
                0x80 | (charcode & 0x3f));
        } else if (charcode < 0xd800 || charcode >= 0xe000) {
            utf8.push(0xe0 | (charcode >> 12),
                0x80 | ((charcode >> 6) & 0x3f),
                0x80 | (charcode & 0x3f));
        }
        else {
            i++;
            charcode = 0x10000 + (((charcode & 0x3ff) << 10)
                | (str.charCodeAt(i) & 0x3ff));
            utf8.push(0xf0 | (charcode >> 18),
                0x80 | ((charcode >> 12) & 0x3f),
                0x80 | ((charcode >> 6) & 0x3f),
                0x80 | (charcode & 0x3f));
        }
    }
    return utf8.length;
}

export default {
    isSupported,
    getCode,
    utf8Length,
    languages }