/// <summary>
/// Begin monitoring the variable with the specified name using this client.
/// </summary>
/// <param name="name">The name of the variable to monitor.</param>
/// <returns>The variable being monitored if it was added successfully, or <c>null</c> otherwise.</returns>
public ISimVariable AddVariable(string name)
{
if (SimVariables.byName.ContainsKey(name))
{
// Do not re-add the variable if it was already added by another client
ISimVariable addedVariable = SimVariables.byName[name];
if (!Variables.Contains(addedVariable))
{
if (connection != null)
{
addedVariable.Register(connection);
}
lock (globalLock) {
Variables.Add(addedVariable);
LogMessage(SimConnectMessage.MessageStatus.Information, $"Started monitoring variable {name}.");
}
}
return(addedVariable);
}
else
{
LogMessage(SimConnectMessage.MessageStatus.Warning, $"Cannot monitor nonexistent variable {name}.");
return(null);
}
}
/// <summary>Execute a message of type <c>ADD_VARIABLE</c>.</summary>
private void ExecuteAddVariable(Dictionary <string, object> request)
{
string name = (string)request["variable"];
ISimVariable variable = simClient.AddVariable(name);
if (variable != null)
{
// Variable was added successfully, send the client its information
SendMessage(new {
type = "DECLARE_VARIABLE",
name = variable.Name,
id = variable.Id,
unit = variable.Unit
});
}
else
{
// The user requested a nonexistent variable
SendErrorMessage($"Cannot monitor unknown variable ${name}");
}
}
