/// <summary>
/// serializes the shape objects and passes it to communicator.send()
/// </summary>
/// <param name="clientUpdate"> the object to be passed to client</param>
public void Send(BoardServerShape clientUpdate, string clientId = "all")
{
// TODO: Correct this error
// var xml_obj = serializer.Serialize(clientUpdate);
// if (clientId == "all")
// communicator.Send(xml_obj, moduleIdentifier);
// else
// communicator.Send(xml_obj, moduleIdentifier, clientId);
}
/// <summary>
/// Manages state and notifies UX on receiving an update from ClientBoardCommunicator.
/// </summary>
/// <param name="serverUpdate">BoardServerShapes signifying the update.</param>
public void OnMessageReceived(BoardServerShape serverUpdate)
{
// a case of state fetching for newly joined client
if (serverUpdate.OperationFlag == Operation.FETCH_STATE && serverUpdate.RequesterId == _currentUserId)
{
// converting network update to UXShapes and sending them to UX
Trace.WriteLine(
"ClientBoardStateManager.OnMessageReceived: FETCH_STATE (subscribe) request's result arrived.");
var uXShapes = UpdateStateOnFetch(serverUpdate);
NotifyClients(uXShapes);
Trace.WriteLine("ClientBoardStateManager.OnMessageReceived: Clients Notified.");
}
else
{
throw new NotImplementedException();
}
}
/// <summary>
/// Saves the updates on state at the server.
/// </summary>
/// <param name="boardServerShape">Object containing the update information for shape.</param>
/// <returns>Boolean to indicate success status of update.</returns>
public bool SaveUpdate(BoardServerShape boardServerShape)
{
throw new NotImplementedException();
}
/// <summary>
/// serializes the shape objects and passes it to communicator.send()
/// </summary>
/// <param name="clientUpdate"> the object to be passed to server</param>
public void Send(BoardServerShape clientUpdate)
{
// TODO: Correct this error
// var xml_obj = serializer.Serialize(clientUpdate);
// communicator.Send(xml_obj, moduleIdentifier);
}
/// <summary>
/// Updates local state on Fetch State from server.
/// </summary>
/// <param name="boardServerShape">BoardServerShape object having the whole update.</param>
/// <returns>List of UXShape to notify client.</returns>
private List <UXShape> UpdateStateOnFetch(BoardServerShape boardServerShape)
{
try
{
var boardShapes = boardServerShape.ShapeUpdates;
List <UXShape> uXShapes = new();
// Sorting boardShapes
boardShapes.Sort(delegate(BoardShape boardShape1, BoardShape boardShape2)
{
return(boardShape1.LastModifiedTime.CompareTo(boardShape2.LastModifiedTime));
});
// updating checkpoint number
_checkpointsNumber = boardServerShape.CheckpointNumber;
_clientCheckPointHandler.CheckpointNumber = _checkpointsNumber;
// updating state
for (var i = 0; i < boardShapes.Count; i++)
{
var boardShapeId = boardShapes[i].Uid;
// insert in id to BoardShape map
if (_mapIdToBoardShape.ContainsKey(boardShapeId))
{
// if already there is some reference present, removing it
_mapIdToBoardShape.Remove(boardShapeId);
GC.Collect();
}
_mapIdToBoardShape.Add(boardShapeId, boardShapes[i]);
// insert in priority queue and id to QueueElement map
var queueElement = new QueueElement(boardShapeId, boardShapes[i].LastModifiedTime);
if (_mapIdToQueueElement.ContainsKey(boardShapeId))
{
// if already there is some reference present, removing it
var tempQueueElement = _mapIdToQueueElement[boardShapeId];
_priorityQueue.DeleteElement(tempQueueElement);
_mapIdToQueueElement.Remove(boardShapeId);
GC.Collect();
}
_mapIdToQueueElement.Add(boardShapeId, queueElement);
_priorityQueue.Insert(queueElement);
// converting BoardShape to UXShape and adding it in the list
uXShapes.Add(new UXShape(UXOperation.CREATE, boardShapes[i].MainShapeDefiner, boardShapeId,
_checkpointsNumber, boardServerShape.OperationFlag));
}
return(uXShapes);
}
catch (Exception e)
{
Trace.WriteLine("ClientBoardStateManager.UpdateStateOnFetch: Exception occurred.");
Trace.WriteLine(e.Message);
}
return(null);
}
