@ssports_fe/ssutils/getUUID.js

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const getCookie = require('./getCookie');
const setCookie = require('./setCookie');

function isEmpty(str) {
    let ret = true;
    if (str && typeof (str) !== 'undefined' && str !== null && str !== 'null' && str !== 'undefined' && str !== '' && str !== '0') {
        ret = false;
    }
    return ret;
}

/**
 *
 * @desc 生成32位随机数
 * @return {String}
 */
const getUUID = function() {
    let uuid = getCookie('cuuid');

    if (isEmpty(uuid)) {
        let s = [];
        let hexDigits = '0123456789abcdef';
        for (let i = 0; i < 36; i++) {
            s[i] = hexDigits.substr(Math.floor(Math.random() * 0x10), 1);
        }
        s[14] = '4';  // bits 12-15 of the time_hi_and_version field to 0010
        s[19] = hexDigits.substr((s[19] & 0x3) | 0x8, 1);  // bits 6-7 of the clock_seq_hi_and_reserved to 01
        s[8] = s[13] = s[18] = s[23] = '-';

        uuid = s.join('');
        uuid = uuid.replace(/-/g, '');
        setCookie('cuuid', uuid, { path: '/', expires: 365 });
    }

    return uuid;
};

module.exports = getUUID;