internal IObservable <Command> ReceiveNodeEvents(byte nodeID, Command command)
{
if (nodeID == 0)
{
throw new ArgumentOutOfRangeException(nameof(nodeID), nodeID, "nodeID must be greater than 0");
}
if (command == null)
{
throw new ArgumentNullException(nameof(command));
}
var commandPipeline = Messages
// decode the response
.Select(message => Decode(message, hasCallbackID: false))
// we only want events (no responses)
.OfType <ControllerEvent>()
// after SendData controler will respond with ApplicationCommandHandler
.Where(@event => Equals(@event.Function, Function.ApplicationCommandHandler))
// deserialize the received payload to a NodeResponse
.Select(@event => @event.Payload.Deserialize <NodeResponse>())
// verify if the responding node is the correct one
.Where(response => response.NodeID == nodeID)
// and select the command
.Select(response => response.Command);
// check if the command contains an ecapsulated MultiChannelCommand
if (Encapsulation.Flatten(command).OfType <MultiChannelCommand>().Any())
{
// extract MultiChannelCommand
var multiChannelRequestCommand = Encapsulation.Flatten(command).OfType <MultiChannelCommand>().Single();
commandPipeline = commandPipeline
// extract the MultiChannelCommand from the response
.Select(reply => Encapsulation.Flatten(reply).OfType <MultiChannelCommand>().SingleOrDefault())
// verify if present
.Where(reply => reply != null)
// verify if the MultiChannelCommand is the correct one
.Where(reply => reply.CommandClass == multiChannelRequestCommand.CommandClass && reply.CommandID == multiChannelRequestCommand.CommandID)
// verify if the endpoint is the correct one
.Where(reply => reply.SourceEndpointID == multiChannelRequestCommand.SourceEndpointID);
}
// get the most inner command
var requestCommand = Encapsulation.Flatten(command).Last();
return(commandPipeline
// select the inner most command
.Select(reply => Encapsulation.Flatten(reply).Last())
// verify if the response conmmand is the correct one
.Where(reply => reply.CommandClass == requestCommand.CommandClass && reply.CommandID == requestCommand.CommandID));
}
// NodeCommand, with return value. Request followed by:
// 1) a response from the controller
// 2) a event from the controller: command deliverd at node)
// 3) a event from the node: return value
internal async Task <Command> Send(byte nodeID, Command command, byte responseCommandID, CancellationToken cancellationToken = default)
{
if (nodeID == 0)
{
throw new ArgumentOutOfRangeException(nameof(nodeID), nodeID, "nodeID must be greater than 0");
}
if (command == null)
{
throw new ArgumentNullException(nameof(command));
}
if (responseCommandID == 0)
{
throw new ArgumentOutOfRangeException(nameof(responseCommandID), responseCommandID, "responseCommandID must be greater than 0");
}
// generate new callback
var callbackID = GetNextCallbackID();
// create the request
var nodeRequest = new NodeRequest(nodeID, command);
var controllerRequest = new ControllerRequest(Function.SendData, nodeRequest.Serialize());
var responsePipeline = Messages
// decode the response
.Select(message => Decode(message, hasCallbackID: false))
// we only want responses (no events)
.OfType <ControllerResponse>()
// verify matching function
.Where(response => Equals(response.Function, controllerRequest.Function))
// unknown what the 0x01 byte means, probably: ready, finished, OK
.Where(response => response.Payload[0] == 0x01);
var eventPipeline = Messages
// decode the response
.Select(message => Decode(message, hasCallbackID: true))
// we only want events (no responses)
.OfType <ControllerEvent>()
// verify matching function
.Where(@event => Equals(@event.Function, controllerRequest.Function))
// verify matching callback
.Where(@event => Equals(@event.CallbackID, callbackID))
// deserialize the received payload to a NodeCommandCompleted
.Select(@event => @event.Payload.Deserialize <NodeCommandCompleted>())
// verify the state
.Verify(completed => completed.TransmissionState == TransmissionState.CompleteOK, completed => new TransmissionException(completed.TransmissionState));
var commandPipeline = Messages
// wait until the response pipeline has finished
.SkipUntil(responsePipeline)
// wait until the event pipeline has finished
.SkipUntil(eventPipeline)
// decode the response
.Select(message => Decode(message, hasCallbackID: false))
// we only want events (no responses)
.OfType <ControllerEvent>()
// after SendData controler will respond with ApplicationCommandHandler
.Where(@event => Equals(@event.Function, Function.ApplicationCommandHandler))
// deserialize the received payload to a NodeResponse
.Select(@event => @event.Payload.Deserialize <NodeResponse>())
// verify if the responding node is the correct one
.Where(response => response.NodeID == nodeID)
// and select the command
.Select(response => response.Command);
// check if the command contains an ecapsulated MultiChannelCommand
if (Encapsulation.Flatten(command).OfType <MultiChannelCommand>().Any())
{
// extract MultiChannelCommand
var multiChannelRequestCommand = Encapsulation.Flatten(command).OfType <MultiChannelCommand>().Single();
// insert MultiChannel filtering
commandPipeline = commandPipeline
// extract the MultiChannelCommand from the response
.Select(reply => Encapsulation.Flatten(reply).OfType <MultiChannelCommand>().Single())
// verify if the MultiChannelCommand is the correct one
.Where(reply => reply.CommandClass == multiChannelRequestCommand.CommandClass && reply.CommandID == multiChannelRequestCommand.CommandID)
// verify if the endpoint the correct one
.Where(reply => reply.SourceEndpointID == multiChannelRequestCommand.TargetEndpointID);
}
// get the most inner command
var requestCommand = Encapsulation.Flatten(command).Last();
commandPipeline = commandPipeline
// select the inner most command
.Select(reply => Encapsulation.Flatten(reply).Last())
// verify if the response conmmand is the correct one
.Where(reply => reply.CommandClass == requestCommand.CommandClass && reply.CommandID == responseCommandID);
return(await Send(Encode(controllerRequest, callbackID), commandPipeline, cancellationToken));
}
