Set context on Google Actions through Dialogflow fulfillment - node.js

Question

I'm using the Dialogflow editor fulfillment to build a conversation on Google Assistant, but I'm not sure how to use the agent.setContext function.
When I ask "Turn off my device" the first step returns successfully. The problem happens when the user responds with "TV", for example. The system returns with another context, ignoring the one I set.
When the user directly asks "Turn off my TV in the kitchen" the system also works perfectly. Because of it I think that the entities are correctly defined.
Conversation 1 (success):
Turn off my TV in the kitchen
Right. Turning off.
Conversation 2 (fail):
Turn off my device //Gives the same intent that Conversation 1
OK, which device?
TV
"My bot" isn't responding right now. Try again soon. //It throws "'final_response' must be set". I think it's because of generic intent actions.intent.TEXT.
My code:
The code below is nested in exports.dialogflowFirebaseFulfillment = functions.https.onRequest and the intent is called by intentMap.set('smarthome.device.switch.off', setDeviceOff);
const agent = new WebhookClient({ request: request, response: response });
function setDeviceOff(agent) {
const device = agent.parameters.device;
const room = agent.parameters.room;
const context= 'device-switch'; //I tried 'smarthome.device.switch.off' too
let resp = commandDevice(device, room, 'Off', agent, context);
return resp;
}
function commandDevice(device, room, cmd, agent, context) {
var conv = agent.conv();
if(device===''){
conv.ask("OK, which device?");
}else if (room===''){
conv.ask("Got it. of what room?");
}else{
conv.ask("Right. Turning off.");
}
agent.setContext({
name:context,
lifespan: 5, //Tried 0, 4 and 3 too
parameters:{
'device':device,
'room':room
}
});
agent.add(conv);
return true;
}
So I tried another version and the same problem persists:
const app = dialogflow();
app.intent('welcome', conv =>{
conv.ask("Welcome to auto obari. What can I do for you?");
});
app.intent('Default Fallback Intent',conv =>{
conv.ask("I didn't understand, can you try again?");
});
app.intent('smarthome.device.switch.off', (conv,{device, room})=> {
const context= 'device-switch';
if(device===''){
conv.ask("OK, which device?");
}else if (room===''){
conv.ask("Got it. of what room?");
}else{
conv.ask("Right. Turning off.");
}
const parameters = {'device':device, 'room': room};
conv.contexts.set(context, 5, parameters);
});
exports.dialogflowFirebaseFulfillment = functions.https.onRequest(app); //I tried exports.factsAboutGoogle, but it threw a error too.
The contexts are the same, but the intent is different.

Answer 1

If using conv, you may also try like this:
app.intent('<INTENT>', conv => {
conv.ask('<RESPONSE>');
const parameters = {'param1':param1, 'param2': param2}};
conv.contexts.set('welcome-context', 5, parameters);
});
and access it like here :
const conv.contexts.get(<context>).parameters[<param>];

Answer 2

you can try this method too it worked for me
const AppContexts = {CONTEXT_ONE: 'context-one'};
const app = dialogflow();
In current intent (for output context)
conv.contexts.set(AppContexts.CONTEXT_ONE, 1);
In next intent (for input context )
const context = conv.contexts.get(AppContexts.CONTEXT_ONE);