/// <summary>
/// Callback called when Element Online state changes (signaled by the T2G Client).
/// </summary>
/// <param name="sender">Source of the event.</param>
/// <param name="args">Event information to send to registered event handlers.</param>
public static void OnElementInfoChanged(object sender, ElementEventArgs args)
{
if (args != null &&
args.SystemInformation != null &&
args.SystemInformation.IsOnline == true &&
args.SystemInformation.PisMission != null &&
args.SystemInformation.PisMission.MissionState == MissionStateEnum.MI)
{
// Will be called multiple times for the same train.
// Some sort of debouncing will be welcome in a future revision
// to prevent multiple notifications to the console(s)
if (string.IsNullOrEmpty(args.SystemInformation.SystemId) == false)
{
TargetAddressType target = new TargetAddressType();
target.Type = AddressTypeEnum.Element;
target.Id = args.SystemInformation.SystemId;
string automaticModeUrl;
if (GetAutomaticMode(out automaticModeUrl) == true)
{
LogManager.WriteLog(
TraceType.INFO,
"Automatically starting streaming on newly detected train: " + args.SystemInformation.SystemId,
"PIS.Ground.LiveVideoControl.LiveVideoControlService.OnElementInfoChanged",
null,
EventIdEnum.LiveVideoControl);
LiveVideoControlResult result =
SendStartStreamingCommand(Guid.Empty, target, automaticModeUrl);
if (result.ResultCode != LiveVideoControlErrorEnum.RequestAccepted)
{
LogManager.WriteLog(TraceType.ERROR,
"Problem sending a start command with url "
+ automaticModeUrl
+ " to train "
+ target.Id
+ ". Error: "
+ result.ResultCode.ToString(),
"PIS.Ground.LiveVideoControl.LiveVideoControlService.OnElementInfoChanged",
null, EventIdEnum.LiveVideoControl);
}
}
else
{
// Manual Mode, resend the latest Start command if available
ServiceInfo lastSentService;
if (_dicVideoHistory.ContainsKey(target) && _dicVideoHistorySentService.TryGetValue(target, out lastSentService))
{
ServiceInfo foundService = (args.SystemInformation.ServiceList != null) ? args.SystemInformation.ServiceList.FirstOrDefault(s => s.ServiceId == (ushort)eServiceID.eSrvSIF_LiveVideoControlServer && s.IsAvailable): null;
bool lServiceLiveVideoControlServerAvailable = foundService != null;
// If service is not available, force the sent status to value false.
if (!lServiceLiveVideoControlServerAvailable && lastSentService != null)
{
_dicVideoHistorySentService[target] = null;
}
// Avoiding sending multiple start notifications.
// The LiveVideoService have to be online
if (lServiceLiveVideoControlServerAvailable == true && (lastSentService == null || !foundService.Equals(lastSentService)))
{
LogManager.WriteLog(
TraceType.INFO,
"Re-starting streaming on newly detected train: " + args.SystemInformation.SystemId,
"PIS.Ground.LiveVideoControl.LiveVideoControlService.OnElementInfoChanged",
null,
EventIdEnum.LiveVideoControl);
LiveVideoControlResult result =
SendStartStreamingCommand(Guid.Empty, target, _dicVideoHistory[target]);
// Setting the flag that the start command was already sent
_dicVideoHistorySentService[target] = foundService;
if (result.ResultCode != LiveVideoControlErrorEnum.RequestAccepted)
{
LogManager.WriteLog(TraceType.ERROR,
"Problem sending a start command with url "
+ _dicVideoHistory[target]
+ " to train "
+ target.Id
+ ". Error: "
+ result.ResultCode.ToString(),
"PIS.Ground.LiveVideoControl.LiveVideoControlService.OnElementInfoChanged",
null, EventIdEnum.LiveVideoControl);
}
}
}
}
}
}
}
