utils.js

Date.prototype.format = function (fmt) {
    var o = {
        "M+": this.getMonth() + 1,                 //月份
        "d+": this.getDate(),                    //日
        "h+": this.getHours(),                   //小时
        "m+": this.getMinutes(),                 //分
        "s+": this.getSeconds(),                 //秒
        "q+": Math.floor((this.getMonth() + 3) / 3), //季度
        "S": this.getMilliseconds()             //毫秒
    };
    if (/(y+)/.test(fmt)) {
        fmt = fmt.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
    }
    for (var k in o) {
        if (new RegExp("(" + k + ")").test(fmt)) {
            fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));
        }
    }
    return fmt;
};

module.exports = {
    format(src) {
        if (arguments.length == 0) return null;
        var args = Array.prototype.slice.call(arguments, 1);
        return src.replace(/\{(\d+)\}/g, function (m, i) {
            return args[i];
        });
    },
    log(desc, type = this.LogInfo) {
        console.log(this.format('[{0}][Synapse {1}] {2}', new Date().format("yyyy-MM-dd hh:mm:ss"), type, desc));
    },
    getFuncName(callee) {
        var _callee = callee.toString().replace(/[\s\?]*/g, "");
        var comb = _callee.length >= 50 ? 50 : _callee.length;
        _callee = _callee.substring(0, comb);
        var name = _callee.match(/^function([^\(]+?)\(/);
        if (name && name[1]) {
            return name[1];
        } else {
            return '{anonymous}';
        }
    },
    randomString(len = 20) {
        var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
        var maxPos = chars.length;
        var pwd = '';
        for (var i = 0; i < len; i++) {
            pwd += chars.charAt(Math.floor(Math.random() * maxPos));
        }
        return pwd;
    },
    LogInfo: "Info",
    LogDebug: "Debug",
    LogWarn: "Warn",
    LogError: "Error"
};