RocketChat/Rocket.Chat

export function utf8Encode(input: string) {
    // METEOR change:
    // The webtoolkit.info version of this code added this
    // Utf8Encode function (which does seem necessary for dealing
    // with arbitrary Unicode), but the following line seems
    // problematic:
    //
    // string = string.replace(/\r\n/g,"\n");
    let utftext = '';

    for (let n = 0; n < input.length; n++) {
        const c = input.charCodeAt(n);

        if (c < 128) {
            utftext += String.fromCharCode(c);
        } else if (c > 127 && c < 2048) {
            utftext += String.fromCharCode((c >> 6) | 192);
            utftext += String.fromCharCode((c & 63) | 128);
        } else {
            utftext += String.fromCharCode((c >> 12) | 224);
            utftext += String.fromCharCode(((c >> 6) & 63) | 128);
            utftext += String.fromCharCode((c & 63) | 128);
        }
    }

    return utftext;
}