'use strict';

var EventEmitter = require('events').EventEmitter;

var cache = {};

function MemoryCache() {

this.engine = 'memorycache';

var oneMinute = 60 * 1000;

this.get = function(key, next) {

var data = cache[key];

if(!data) { return next(null, null); }

var expires = Date.now();

if(expires - data.expires > 0) {

setTimeout(function() {

next(null, null, data.content);

},5);

} else {

setTimeout(function() {

next(null, data.content);

},5);

}

};

this.set = function(key, value, _ttl, next) {

var ttl = _ttl || oneMinute;

var expires = Date.now() + ttl*1;

cache[key] = {expires:expires, content:value};

if(next) { next(null); }

};

this.emit('ready');

}

module.exports = MemoryCache;

require('util').inherits(MemoryCache, EventEmitter);