logging.js

var Logging = (function () {

    function create(source) {
        function F() {}
        F.prototype = source;
        return new F();
    };
    
    var LoggerBase = function (opts) {
        var opts  = opts || {};
        this.name = opts.name;
    };
    LoggerBase.prototype = {
        // Butter's log function
        debug: function () { this.addLog('debug', arguments); },
        // Standard firebug logging
        log  : function () { this.addLog('log'  , arguments); },
        info : function () { this.addLog('info' , arguments); },
        warn : function () { this.addLog('warn' , arguments); },
        error: function () { this.addLog('error', arguments); },
        messages: {
            debug : [],
            log   : [],
            info  : [],
            warn  : [],
            error : []
        }
    };

    var SilentLogger = {
        create: function (opts) {
            var logger = new LoggerBase(opts);
            logger.addLog = function (type) {
                var type = type,
                    args = [].slice.call(arguments, 1);
                if (this.messages[type]) {
                    this.messages[type].push(args);
                }  
            }
            return logger;
        }
    };

    var ConsoleLogger = {
        create: function (opts) {
            var logger = new LoggerBase(opts);
            logger.addLog = function (type) {
                var type = type,
                    args = [].slice.call(arguments, 1);

                if (this.name) {
                    args = [this.name + ':'].concat(args);
                }

                if (this.messages[type]) {
                    this.messages[type].push(args);
                }
                if (console[type]) {
                    console[type].apply(this, args);
                }
            };
            return logger;
        }
    };

    return {
        SilentLogger  : SilentLogger,
        ConsoleLogger : ConsoleLogger
    }
})();