(function() {
  window.LocalStorage = (function() {
    var time;

    LocalStorage.prototype.prefix = 'cache.';

    LocalStorage.prototype.cache = 60;

    function LocalStorage() {
      this.prefix = 'cache.';
      this.cache = 60;
    }

    LocalStorage.prototype.remember = function(name, minutes, callback) {
      var result;
      if (callback == null) {
        callback = (function() {});
      }
      if (this.has(name)) {
        return this.read(name).value;
      }
      result = callback((function(_this) {
        return function(result) {
          if (result != null) {
            return _this.write(name, result, minutes);
          }
        };
      })(this));
      if (result != null) {
        this.write(name, result, minutes);
      }
      return this;
    };

    LocalStorage.prototype.put = function(name, value, minutes) {
      if (minutes == null) {
        minutes = this.cache;
      }
      this.write(name, value, minutes);
      return this;
    };

    LocalStorage.prototype.has = function(name) {
      var result;
      result = this.read(name);
      if (result == null) {
        return false;
      }
      return result.timestamp > time();
    };

    LocalStorage.prototype.read = function(name) {
      var result;
      result = localStorage.getItem(this.prefix + name);
      if (result != null) {
        return JSON.parse(result);
      } else {
        return void 0;
      }
    };

    LocalStorage.prototype.write = function(name, val, minutes) {
      if (minutes == null) {
        minutes = this.cache;
      }
      localStorage.setItem(this.prefix + name, JSON.stringify({
        value: val,
        timestamp: time() + minutes
      }));
      return this;
    };

    time = function() {
      return Math.ceil((new Date).getTime() / 1000 / 60);
    };

    return LocalStorage;

  })();

}).call(this);