private async Task <AlexaResponse> GetIntentResponseAsync(AlexaRequest request)
{
string intentName = request?.Request?.Intent?.Name;
if (string.IsNullOrWhiteSpace(intentName))
{
throw new Exception("No intent name found");
}
Adventure adv = await _adventureRep.GetAdventureAsync();
AdventureNode curNode = await _curNodeRep.GetCurrentNodeAsync(request, adv.Nodes);
string nextNodeName = null;
AlexaResponse resp = null;
if (intentName.Equals("BeginIntent", StringComparison.OrdinalIgnoreCase) || intentName.Equals(BuiltInIntents.StartOverIntent))
{
AdventureNode startNode = adv.GetStartNode();
if (startNode == null)
{
throw new Exception($"Start node {adv.StartNodeName} not found");
}
nextNodeName = startNode.Name;
resp = startNode.ToAlexaResponse(_linkProcessor, adv.VoiceId);
}
else if (intentName.Equals(BuiltInIntents.CancelIntent) || intentName.Equals(BuiltInIntents.StopIntent))
{
AdventureNode stopNode = adv.GetStopNode();
if (stopNode == null)
{
throw new Exception($"Start node {adv.StopNodeName} not found");
}
resp = stopNode.ToAlexaResponse(_linkProcessor, adv.VoiceId);
}
else if (intentName.Equals("ResumeIntent", StringComparison.OrdinalIgnoreCase))
{
resp = curNode.ToAlexaResponse(_linkProcessor, adv.VoiceId);
}
else if (intentName.Equals(BuiltInIntents.HelpIntent))
{
AdventureNode helpNode = adv.GetHelpNode();
if (helpNode == null)
{
throw new Exception($"Help node {helpNode.Name} not found");
}
resp = MergeNodeResponses(helpNode, curNode, adv.VoiceId);
}
else if (intentName.Equals(BuiltInIntents.FallbackIntent))
{
resp = GenerateFallbackResponse(adv, curNode);
}
else
{
if (curNode != null)
{
// Process the route
NodeRoute selectedRoute = curNode.NodeRoutes.FirstOrDefault(x => x.IntentName.Equals(intentName, StringComparison.OrdinalIgnoreCase));
if (selectedRoute != null)
{
nextNodeName = selectedRoute.NextNodeName;
if (!string.IsNullOrWhiteSpace(nextNodeName))
{
AdventureNode nextNode = adv.GetNode(nextNodeName);
if (nextNode != null)
{
resp = nextNode.ToAlexaResponse(_linkProcessor, adv.VoiceId);
}
else
{
_logger.LogWarning($"Next node {nextNodeName} on node {curNode} not found for intent {intentName}");
}
}
else
{
_logger.LogWarning($"Node name missing for node route for {intentName} provided on node {curNode.Name}");
}
}
else
{
resp = GenerateFallbackResponse(adv, curNode);
// unsupported intent. Send reprompt.
_logger.LogWarning($"Node route not found for {intentName} provided on node {curNode.Name}");
}
}
else
{
resp = GenerateFallbackResponse(adv, null);
// unsupported intent. Send reprompt.
_logger.LogWarning($"Node {curNode.Name} on session attribute {AdventureNode.CURNODE_ATTRIB} not found");
}
}
// If the next node is known, then set it. Otherwise, keep the user on the current node.
if (string.IsNullOrWhiteSpace(nextNodeName))
{
if (curNode != null)
{
await _curNodeRep.SetCurrentNodeAsync(request, resp, curNode.Name);
}
}
else
{
await _curNodeRep.SetCurrentNodeAsync(request, resp, nextNodeName);
}
return(resp);
}