public VideoSizeHelper(ViewModel.INode nodeContext)
{
ViewModel.IMetadata videoSizeMetadata = nodeContext.Metadata["Video.Size"];
if (videoSizeMetadata != null)
{
Size = ParseVideoSize(videoSizeMetadata.Value);
}
}
private void LoadVideoDetails()
{
ViewModel.IMetadata videoSourceMetadata = Context.Metadata["Video.Source"];
if (videoSourceMetadata == null)
{
HasVideo = false;
}
else
{
HasVideo = true;
VideoSource = videoSourceMetadata.Value;
}
if (HasVideo)
{
ViewModel.IMetadata startPositionMetadata = Context.Metadata["Video.StartPosition"];
if (startPositionMetadata != null && _startPosition == null)
{
if (!string.IsNullOrEmpty(startPositionMetadata.Value))
{
TimeSpan parsedStartPosition;
if (TimeSpan.TryParse(startPositionMetadata.Value, out parsedStartPosition))
{
StartPosition = parsedStartPosition;
}
else
{
HasVideo = false;
StartPosition = new TimeSpan(0);
}
}
}
ViewModel.IMetadata stopPositionMetadata = Context.Metadata["Video.EndPosition"];
if (stopPositionMetadata != null && _stopPosition == null)
{
if (!string.IsNullOrEmpty(stopPositionMetadata.Value))
{
TimeSpan parsedStopPosition;
if (TimeSpan.TryParse(stopPositionMetadata.Value, out parsedStopPosition))
{
StopPosition = parsedStopPosition;
}
else
{
StopPosition = null;
}
}
}
}
}
private void HandleGetSourceAndPositionCallback(Event callback)
{
if (callback.EventArgs != null && callback.ContainsEventArg("CallbackId") &&
callback.ContainsEventArg("Position") && callback.ContainsEventArg("Source") &&
callback.ContainsEventArg("NodeId"))
{
string callbackId = callback.GetEventArgValue("CallbackId");
string source = callback.GetEventArgValue("Source");
source = HttpUtility.UrlDecode(source);
string viewModelIdAsString = callback.GetEventArgValue("NodeId");
if (!string.IsNullOrEmpty(viewModelIdAsString) && !string.IsNullOrEmpty(source))
{
var chain = new TransactionChain();
var viewModelId = new Guid(viewModelIdAsString);
var viewModelVideoInfo = ViewModels[viewModelId];
switch (callbackId)
{
case "StartPosition":
{
TimeSpan startPosition = TimeSpan.Parse(callback.GetEventArgValue("Position"));
// Just add a temporary end position so that the entry doesn't end up in a bad state.
ViewModel.IMetadata startPositionMetadata = viewModelVideoInfo.Context.Metadata["Video.StartPosition"];
if (startPositionMetadata != null)
{
startPositionMetadata.SetValue(startPosition.ToString(), ref chain);
((SuperGraph.ViewModel.Node)viewModelVideoInfo.Context).NodeProperties.UIMetadata["Video.StartPosition"] = startPosition.ToString();
}
else
{
viewModelVideoInfo.Context.Metadata.Add("Video.StartPosition", startPosition.ToString(), ref chain);
((SuperGraph.ViewModel.Node)viewModelVideoInfo.Context).NodeProperties.UIMetadata.Add("Video.StartPosition", startPosition.ToString());
}
ViewModel.IMetadata endPositionMetadata = viewModelVideoInfo.Context.Metadata["Video.EndPosition"];
if (endPositionMetadata != null)
{
endPositionMetadata.SetValue("", ref chain);
}
else
{
viewModelVideoInfo.Context.Metadata.Add("Video.EndPosition", "", ref chain);
((SuperGraph.ViewModel.Node)viewModelVideoInfo.Context).NodeProperties.UIMetadata.Add("Video.EndPosition", "");
}
viewModelVideoInfo.HasVideo = true;
viewModelVideoInfo.StartPosition = startPosition;
viewModelVideoInfo.StopPosition = null;
break;
}
case "EndPosition":
{
TimeSpan endPosition = TimeSpan.Parse(callback.GetEventArgValue("Position"));
ViewModel.IMetadata endPositionMetadata = viewModelVideoInfo.Context.Metadata["Video.EndPosition"];
if (endPositionMetadata != null)
{
endPositionMetadata.SetValue("", ref chain);
((SuperGraph.ViewModel.Node)viewModelVideoInfo.Context).NodeProperties.UIMetadata["Video.EndPosition"] = endPosition.ToString();
}
else
{
viewModelVideoInfo.Context.Metadata.Add("Video.EndPosition", "", ref chain);
((SuperGraph.ViewModel.Node)viewModelVideoInfo.Context).NodeProperties.UIMetadata.Add("Video.EndPosition", endPosition.ToString());
}
viewModelVideoInfo.Context.Metadata.Add(null, null, "Video.EndPosition", endPosition.ToString(), ref chain);
viewModelVideoInfo.StopPosition = endPosition;
viewModelVideoInfo.HasVideo = true;
break;
}
}
ViewModel.IMetadata videoSourceMetadata = viewModelVideoInfo.Context.Metadata["Video.Source"];
if (videoSourceMetadata != null)
{
videoSourceMetadata.SetValue(source, ref chain);
((SuperGraph.ViewModel.Node)viewModelVideoInfo.Context).NodeProperties.UIMetadata[
"Video.Source"] = source;
}
else
{
viewModelVideoInfo.Context.Metadata.Add(null, null, "Video.Source", source, ref chain);
((SuperGraph.ViewModel.Node)viewModelVideoInfo.Context).NodeProperties.UIMetadata.Add("Video.Source", source);
}
viewModelVideoInfo.VideoSource = source;
viewModelVideoInfo.Context.Proxy.MapManager.ExecuteTransaction(chain);
}
}
}
