function nullOrEmpty(s) {
    return s == null || typeof s !== 'string' || s.length === 0;
}

function contains(s, key, ignoreCase) {
    if (nullOrEmpty(s) || key == null) {
        return false;
    }
    if (typeof key !== 'string') {
        key = String(key);
    }
    if (ignoreCase) {
        return s.toLowerCase().indexOf(key.toLowerCase()) >= 0;
    }
    return s.indexOf(key) >= 0;
}

function endsWith(s, suffix) {
    if (nullOrEmpty(s) || nullOrEmpty(suffix)) {
        return false;
    }
    return s.indexOf(suffix) === s.length - suffix.length;
}

function padStart(s, num, char) {
    if (nullOrEmpty(s) || isNaN(num) || num <= s.length) {
        return s;
    }
    return (char ?? ' ').repeat(num - s.length);
}

function formatUrl(msg) {
    //const urlReg = /(https?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-]*)*\/?/ig;
    //const urlArrray = str.match(urlReg);
    const p = /(http|ftp|https):\/\/.+?(\s|\r\n|\r|\n|\"|\'|\*|$)/g;
    const r = msg.match(p);
    msg = htmlencode(msg);

    if (r?.length > 0) {
        const rs = [];
        for (let t of r) {
            t = t.replace(/["'\r\n ]/g, '');
            if (rs.indexOf(t) < 0) {
                rs.push(t);
            }
        }

        for (let r of rs) {
            msg = msg.replaceAll(r, '<a target="_blank" href="' + r + '"><svg><use xlink:href="' + ((typeof consts !== 'undefined' && consts.path) ?? '') + 'fonts/fa-regular.svg#link"></use></svg></a>');
        }
    }

    return msg
        .replaceAll('\r\n', '<br/>')
        .replaceAll('\n', '<br/>')
        .replaceAll('  ', '&nbsp;');
}

export {
    nullOrEmpty,
    contains,
    endsWith,
    padStart,
    formatUrl
}