/// <summary>
/// Sends data to specific connecting clients.
/// </summary>
/// <param name="connectionIds">Identifies the clients.</param>
/// <param name="propertyName">Property name to send.</param>
/// <param name="propertyValue">Property value to send.</param>
protected void Send <T>(IList <string> connectionIds, string propertyName, T propertyValue = default(T))
{
var eventArgs = new SendEventArgs {
Properties = new Dictionary <string, object> {
{ propertyName, propertyValue }
}
};
foreach (string connectionId in connectionIds)
{
eventArgs.ConnectionIds.Add(connectionId);
}
Send(eventArgs);
}
/// <summary>
/// Sends data to the clients.
/// </summary>
/// <param name="args">Contains information on who to send to.</param>
protected void Send(SendEventArgs args)
{
var delegates = RequestSend?.GetInvocationList().ToList();
if (delegates != null && delegates.Count > 0)
{
args.SendData = true;
foreach (var d in delegates)
{
d.DynamicInvoke(this, args);
if (!args.SendData)
{
break;
}
}
}
}
/// <summary>
/// Handles send request from a multicast view model.
/// </summary>
private void VMInstance_RequestSend(object sender, SendEventArgs e)
{
var vmInfo = _activeVMs.FirstOrDefault(kvp => kvp.Value.Instance == sender).Value;
if (vmInfo == null)
{
return;
}
var vmInstance = vmInfo.Instance;
Send(vmInfo, new GroupSend
{
GroupName = e.GroupName,
ConnectionIds = e.ConnectionIds,
ExcludedConnectionIds = e.ExcludedConnectionIds,
UserIds = e.UserIds,
Data = vmInstance.Serialize(e.Properties)
});
e.SendData = false;
}
