/// <summary>
/// Checks to see if the map state has changed, if so invokes the events.
/// </summary>
public Task CheckChangesAsync()
{
WorldEntityAddedArgs entityAddedArgs = null;
WorldEntityRemovedArgs entityRemovedArgs = null;
MapStateChangedArgs mapStateChangedArgs = null;
lock (_lock)
{
if (_worldEntityAdded)
{
var newEntities = _newEntities;
entityAddedArgs = new WorldEntityAddedArgs
{
AddedEntities = newEntities,
ConnectedPlayers = _connectedPlayers
};
_newEntities = new List <WorldEntity>();
_worldEntityAdded = false;
}
if (_worldEntityRemoved)
{
var removedEntities = _removedEntityIds;
entityRemovedArgs = new WorldEntityRemovedArgs
{
RemovedEntityIds = removedEntities,
ConnectedPlayers = _connectedPlayers
};
_removedEntityIds = new List <int>();
_worldEntityRemoved = false;
}
if (_isStateChanged)
{
mapStateChangedArgs = new MapStateChangedArgs
{
Entities = _allEntities,
ConnectedPlayers = _connectedPlayers
};
_isStateChanged = false;
}
}
var tasks = new List <Task>();
if (entityAddedArgs != null)
{
tasks.Add(Task.Run(() => WorldEntityAdded?.Invoke(this, entityAddedArgs)));
}
if (entityRemovedArgs != null)
{
tasks.Add(Task.Run(() => WorldEntityRemoved?.Invoke(this, entityRemovedArgs)));
}
if (mapStateChangedArgs != null)
{
tasks.Add(Task.Run(() => MapStateChanged?.Invoke(this, mapStateChangedArgs)));
}
tasks.Add(Task.Run(() => GameTick?.Invoke(this, new GameTickEventArgs())));
return(Task.WhenAll(tasks));
}
/// <summary>
/// Invoked whenever one or more WorldEntities moves, are added, or removed from the map.
/// Sends the changes in WorldEntity positions to all players who are on the map.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private async void OnMapStateChanged(object sender, MapStateChangedArgs e)
{
var entityLocations = e.Entities.Select(kvp => new
{
Id = kvp.Key.Id,
Location = kvp.Value
});
try
{
await _hubContext.Clients.Group(MapId)
.SendAsync("updateEntities", entityLocations);
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
}
