RubyLouvre/anu

var matchHtmlRegExp = /["'&<>]/;

function escapeHtml(string) {
    var str = '' + string;
    var match = matchHtmlRegExp.exec(str);

    if (!match) {
        return str;
    }

    var escape;
    var html = '';
    var index = 0;
    var lastIndex = 0;

    for (index = match.index; index < str.length; index++) {
        switch (str.charCodeAt(index)) {
        case 34:
            // "
            escape = '&quot;';
            break;
        case 38:
            // &
            escape = '&amp;';
            break;
        case 39:
            // '
            escape = '&#x27;'; // modified from escape-html; used to be '&#39'
            break;
        case 60:
            // <
            escape = '&lt;';
            break;
        case 62:
            // >
            escape = '&gt;';
            break;
        default:
            continue;
        }

        if (lastIndex !== index) {
            html += str.substring(lastIndex, index);
        }

        lastIndex = index + 1;
        html += escape;
    }

    return lastIndex !== index ? html + str.substring(lastIndex, index) : html;
}

export function encodeEntities(text) {
    if (typeof text === 'boolean' || typeof text === 'number') {
        return '' + text;
    }
    return escapeHtml(text);
}