private async void GetTimesheets()
        {
            var currentDate = DateTime.Now;
            var previousDate = currentDate.AddDays(-7);
            var nextDate = currentDate.AddDays(7);

            var startsAt = previousDate.Year + "-" + previousDate.Month + "-" + previousDate.Day;
            var endsAt = nextDate.Year + "-" + nextDate.Month + "-" + nextDate.Day;

            var url = String.Format("http://cannedair-staging.cfapps.io/v1/users/{0}/timesheets?starts_at={1}&ends_at={2}", CurrentUser.Instance.OpenAirId, "2013-11-18", "2013-12-25"); //startsAt, endsAt); TODO: Fix!

            IsLoading = true;
            var response = await _mainservice.GetTimesheets(url);
            var tmpList = new List<Timesheet>();
            if (!String.IsNullOrEmpty(response))
            {
                var responseJsonArray = JArray.Parse(response);
                foreach (var timesheet in responseJsonArray)
                {
                    if (tmpList.Count == 3)
                    {
                        break;
                    }
                    tmpList.Add(JsonConvert.DeserializeObject<Timesheet>(timesheet.ToString()));
                }
                while (tmpList.Count < 3)
                {
                    var emptyTimesheet = new Timesheet {UserId = String.Empty, Id = String.Empty, StartsAt = String.Empty, EndsAt = String.Empty, Tasks = new List<Task>()};
                    tmpList.Add(emptyTimesheet);
                }
                Timesheets = tmpList;
            }
            else
            {
                // TODO: failure
            }
            IsLoading = false;
        }
            public List<Day> ValueList { get; set; } //
            
            public TimesheetWeek(Timesheet timesheet)
            {
                InitializeDaysDictionary();
                OriginalTimesheet = timesheet;
                
                KeyList = new List<string>(); //
                ValueList = new List<Day>(); //

                foreach (var task in timesheet.Tasks)
                {
                    var day = Convert.ToDateTime(task.Date).DayOfWeek.ToString().ToLower();
                    if (Days.ContainsKey(day))
                    {
                        Days[day].TotalHours += Convert.ToDouble(task.Hours);
                        Days[day].Tasks.Add(task);
                    }
                }

                KeyList = Days.Keys.ToList(); //
                ValueList = Days.Values.ToList(); //
            }