Remember previous answers to guide conversation - botframework

Question

I'm creating a chatbot using LUIS template and I have an intent called StartTest with utterances like these:
Begin [TestNameEntity] on [GearEntity] and [RPMEntity]
Begin [TestNameEntity] on [GearEntity]
Begin [TestNameEntity]
If the user input matches the first utterance, I have all entities I need. However, if its input matches the second utterance, I have to ask him the RPM. And for the third utterance I have to ask the gear and the RPM.
But for the second and third utterances I need to know what the user has said for the [TestNameEntity], like this:
User: Begin test 1 on second gear
Bot: What RPM?
User: 2500
How can I achieve this?

Answer 1

once your Intent method is called you can use this logic
result.Entities[0].Type to get entity name
so you can iterate result.Entities to get all the entities user has entered. If any of the three entities is missing you can ask for a prompt. This is a sample code of how to achieve it.
//global variables
public string CurrentGear { get; set; }
public string CurrentRpm { get; set; }
[LuisIntent("StartTest")]
public async Task StartTestIntent(IDialogContext context, LuisResult result)
{
if (result.Entities != null && result.Entities.Count >0)
{
//sample you will get selected entity type
//var ent1=result.Entities[0].Type;
var userValues=GetUserEntities(result);
if(userValues["GearEntity"]==null)
showGearPrompt(context);
if(userValues["RPMEntity"]==null)
showRpmPrompt(context);
}
}
private string[] GetUserEntities(LuisResult result)
{
//your logic here
//return list of entities;
}
private async Task showGearPrompt(IDialogContext context)
{
PromptDialog.Text(
context: context,
resume: OnGearOptionReceivedAsync,
prompt: "please enter Gear Value",
retry: "Sorry, I didn't understand that. Please try again."
);
}
public virtual async Task OnGearOptionReceivedAsync(IDialogContext context, IAwaitable<string> gear)
{
string response = await gear;
CurrentGear = response;
}
private async Task showRpmPrompt(IDialogContext context)
{
PromptDialog.Text(
context: context,
resume: OnRpmOptionReceivedAsync,
prompt: "please enter RPM Value",
retry: "Sorry, I didn't understand that. Please try again."
);
}
public virtual async Task OnRpmOptionReceivedAsync(IDialogContext context, IAwaitable<string> rpm)
{
string response = await rpm;
CurrentRpm = response;
}
Link to how to use prompts