public static void Main(string[] args)
{
var getNextCallTimer = new Timer
{
Enabled = true,
Interval = 5000
};
getNextCallTimer.Elapsed += GetNextCallTimerOnElapsed;
getNextCallTimer.Start();
MockAPI.RequestQueue = new Queue <WakeUpCallRequest>();
_wakeupCallList = new LinkedList <WakeUpCallRequest>();
_requestDict = new Dictionary <int, LinkedListNode <WakeUpCallRequest> >();
while (true)
{
Console.WriteLine("Room Number:");
int room;
if (!Int32.TryParse(Console.ReadLine(), out room))
{
Console.WriteLine("!!! Invalid room number, please enter an integer.");
continue;
}
Console.WriteLine("Wake-up Time(HH:mm:ss):");
var inputTime = Console.ReadLine();
if (string.IsNullOrEmpty(inputTime))
{
MockAPI.RequestQueue.Enqueue(new WakeUpCallRequest(room));
Console.WriteLine("--> Room num [{0}] Cancel wakeup call", room);
}
else
{
TimeSpan time;
while (!TimeSpan.TryParse(inputTime, out time))
{
Console.WriteLine("!!! Invalid wake-up time, please enter a datetime.");
inputTime = Console.ReadLine();
}
Console.WriteLine("--> Room num [{0}] call at: {1}", room, time);
DateTime date = time < MockAPI.getCurrenTime() ? DateTime.Today.AddDays(1) : DateTime.Today;
MockAPI.RequestQueue.Enqueue(new WakeUpCallRequest(room, date + time));
}
}
}
private static void GetNextCallTimerOnElapsed(object sender, ElapsedEventArgs elapsedEventArgs)
{
var request = MockAPI.getNextCallRequest();
if (request != null)
{
// when the request of the room is cancelled
if (request.WakeUpTime == null)
{
RemoveFromSortedWakeUpList(request);
}
// when the request of the room is not cancelled
else
{
RemoveFromSortedWakeUpList(request);
InsertIntoSortedWakeUpList(request);
}
}
Alarm();
}
private static void Alarm()
{
if (Monitor.TryEnter(_wakeupCallList))
{
try
{
if (_wakeupCallList.First == null)
{
return;
}
WakeUpCallRequest firstCallRequest = _wakeupCallList.First.Value;
DateTime earliestCallTime = firstCallRequest.WakeUpTime.Value;
if (DateTime.Today + MockAPI.getCurrenTime() >= earliestCallTime)
{
MockAPI.sendAlarmCall(firstCallRequest.RoomNo);
RemoveFromSortedWakeUpList(firstCallRequest);
}
}
finally
{
Monitor.Exit(_wakeupCallList);
}
}
}
