[We have a Dialogflow bot consisting of two intents. Each intent contains some set of questions.
The user answers the questions(prompts) and this process continues. We are getting the fulfillment text only after the intent is completed but we need to get the fulfillment text(Each and every prompt) after completing every question in that particular intent.
Help us in finding the solution.
You can use webhook for slot filling. (under the "Enable webhook call for this intent", enable Enable webhook call for slot filling button). By doing this, you can still stay in intent handler function and prompt what you need until you can finish your steps.
For example:
function flight(agent) {
const city = agent.parameters['geo-city'];
const time = agent.parameters['time'];
const gotCity = city.length > 0;
const gotTime = time.length > 0;
if(gotCity && gotTime) {
agent.add(`Nice, you want to fly to ${city} at ${time}.`);
} else if (gotCity && !gotTime) {
agent.add('Let me know which time you want to fly');
} else if (gotTime && !gotCity) {
agent.add('Let me know which city you want to fly to');
} else {
agent.add('Let me know which city and time you want to fly');
}
}
Also you can use this functionality on actions-on-google library.
Check for more information:
Webhook for slot filling
Enable Webhook for Slot Filling. Dialogflow will call your server to see if you can provide the pending information that your user didn’t.
Related
I am using bot builder sdk for node.js to create a chatbot. Also connected it to facebook channel. I am using the following code to greet the user:
var bot = new builder.UniversalBot(connector, [
(session, result, next) => {
let text = '';
switch(session.message.address.channelId) {
case 'facebook':
text = 'Hi ' + session.message.user.name + ' !';
break;
default:
text = 'Hi !';
}
session.sendTyping();
session.say(text);
next();
},
(session, say) => {
}
]);
The above code works fine, but I want to add "Get Started" button in the typing bar to invoke the above code. Note that this button appears only once. Please find image of the typing bar below:
Is there a way to achieve this using bot builder sdk for node.js ?
Thanks
Although one can certainly add a button to start any activity with the bot, but that will limit the bots potential to only one customizable channel, i.e. WebChat.
I think there are better 2 alternative ways to get the desired functionality which will work across many channels.
First
I would suggest to add a conversation update event. Code goes in the botbuilder's middleware. Here is a sample code from the docs.
bot.on('conversationUpdate', function (message) {
if (message.membersAdded && message.membersAdded.length > 0) {
// Say hello
var txt = "Send me a Hi";
var reply = new builder.Message()
.address(message.address)
.text(txt);
bot.send(reply);
});
What this will do is make the bot send a message Send me a Hi to the user, if it determines this is a first time visitor. This will give the visitor enough cue to send the bot Hi by typing it. Although he can enter whatever he wants, but this will result in the invocation of the 1st dialog configured which in this case is the will be the dialog which you have posted in question.
Second
You can mark some dialog to be invoked automatically if your bot has never encountered this visitor. Here is the sample code...
var bot = new builder.UniversalBot(connector);
bot.dialog('firstRun', function (session) {
session.userData.firstRun = true;
session.send("Hello...").endDialog();
}).triggerAction({
onFindAction: function (context, callback) {
// Only trigger if we've never seen user before
if (!context.userData.firstRun) {
// Return a score of 1.1 to ensure the first run dialog wins
callback(null, 1.1);
} else {
callback(null, 0.0);
}
}
});
Here we have split the bot creation and dialog registration in 2 steps. And while registering the firstRun dialog, we have provided it the triggerAction that if the visitor is new, then trigger this dialog.
Both of these approaches do not use adding some extra buttons and it is up to the bot either to educate him on sending some message which in turn will start the 1st dialog or directly start some dialog.
For more info on conversationEvent you can refer to this page
I tried the above options, but they didn't seem to be working for facebook messenger. But I found a solution to add the Get Started button into the typing bar of the messenger. For that we need to use the Facebook Graph API and not the bot builder sdk.
https://graph.facebook.com/v2.6/me/messenger_profile?access_token=<PAGE_ACCESS_TOKEN>
{
"get_started":{
"payload":"Get Started"
}
}
The above API call will add the button for you to get the conversation started.
Thanks all for the help!!
I am using https://github.com/dialogflow/dialogflow-fulfillment-nodejs to create fulfillment webhook for dialogflow.
Currently I have intent that have 1 required parameter with prompt (so the agent will ask specific question for this parameter) and enable webhook call for this intent.
In the webhook, I check the parameter if that parameter is valid (call external api or something else), then I will trigger setFollowupEvent to move to other intent. But if the parameter is not valid, then I will trigger setFollowupEvent to return to this intent so the user should input it again. But I want to give the user a reason why that parameter is not valid.
The code is something like this
function registerUserStartHandler(agent) {
let payload = request.body.originalDetectIntentRequest.payload;
let senderDetail = getSenderDetail(payload);
return isUserRegistered(senderDetail.senderId, senderDetail.platformType).then((res) => {
if (res) {
agent.add('User already registered, enter another user');
//register_user_ask_user is this same intent (so I just returned to current intent if failed)
agent.setFollowupEvent('register_user_ask_user');
} else {
agent.setFollowupEvent('register_user_ask_other_info');
}
return Promise.resolve();
})
}
But, currently dialogflow will return to user the prompt message that I defined for that required parameter not the reason message.
How to replace this prompt message with my message from webhook?
We are using api.api with fulfillment
After asking to sign in with the code:
app.askForSignIn();
We get intent call for input.unknown
We added sign handler but it is not called
const SIGN_IN = 'sign.in';
actionMap.set(SIGN_IN, signInLogic);
function signInLogic(app) {
let intent = app.getIntent();
console.log('signInLogic start intent: ', intent);
}
What needs to define in api.ai as intent to get the correct intent call?
I could not find a place to define system intents
If my bot asks different questions and if the user answers each of them, how do I find out which answer relates to which question. There is a field called metadata that you can attach to the sendTextMessage API but when the user responds, this metadata comes in as undefined. Do you guys use any node-cache for tracking state or an FSM such as machina.js? How can I best figure out at what of the conversation we are currently stuck in?
When your app receives a message, there's no payload or metadata associated with it. This is as opposed to a quick-reply or post-back which can have a payload. The only way to associate a response with a question this is to manually track the conversation state in your app as suggested by #anshuman-dhamoon
To do this, it's best to maintain a state for each user, as well as the next state for each state.
// optionally store this in a database
const users = {}
// an object of state constants
const states = {
question1: 'question1',
question2: 'question2',
closing: 'closing',
}
// mapping of each to state to the message associated with each state
const messages = {
[states.question1]: 'How are you today?',
[states.question2]: 'Where are you from?',
[states.closing]: 'That\'s cool. It\'s nice to meet you!',
}
// mapping of each state to the next state
const nextStates = {
[states.question1]: states.question2,
[states.question2]: states.closing,
}
const receivedMessage = (event) => {
// keep track of each user by their senderId
const senderId = event.sender.id
if (!users[senderId].currentState){
// set the initial state
users[senderId].currentState = states.question1
} else {
// store the answer and update the state
users[senderId][users[senderId].currentState] = event.message.text
users[senderId].currentState = nextStates[users[senderId.currentState]]
}
// send a message to the user via the Messenger API
sendTextMessage(senderId, messages[users[senderId].currentState])
}
Note If you wanted, you can even make the values of nextStates into callable functions that take the answer of the current state and branch off into different conversation flows by passing the user to a different state depending on his/her response.
As per my knowledge,in Facebook chatbot you can send data from user to chatbot just by setting payload from postback buttons as they have given in API reference.
And chatbot won't store your session or any states/flags.you can set status or flags or arrays but all will be lost when you update your application or restart your server.
so,if you really want to set status you should use database for that.and senderID will remain same everytime so you can handle data from database by that particular id for particular user.
For more details checkout technical referance here.
I hope this will help you.if so,kindly mark it as an answer.
You can have a status code in your code, to keep track of where the user conversation with the bot is.
For eg. if you have 10 questions, keep statuscode = 0 initially, and ask the first question. When you receive a message to your webhook, check if statuscode==0, and store that user message as a response to your first question. Then increment statusCode=1 and ask the next question.
You can have multiple flags and statusCodes to deal with different conversation flows.
I'm running into this issue myself. Though it hasn't been mentioned at all in their documentation, I don't think attaching an in-memory database is out of the question. It seems that the user_id is the same regardless of when the conversation is initiated.
Making an API call every time the user rejoins the session would probably slow down the performance of the bot. Also, I noticed that you can't really construct a "pseudo-distributed database" by using the metadata key in the API if that is what you were suggesting. The metadata tag can be sent from Server -> Client (Messenger) but not from Client -> Server from what the documentation says.
I've spent some time working with this. The best solution is to use a database to track the user's conversation flow. The POST object contains the senders ID. You can use this ID to make a row in the database in which you'd definitely need to store this ID, any answers to the questions, and a field to keep track of of which step in the conversation.
Then you can use if statements in your code to return the proper responses. Some example code below:
if( $currentStep == '1' ){
// Ask Next Question
$message_to_reply = "Thank you! What's your name?";
$message_to_reply = '"text":"'.$message_to_reply.'"';
} elseif( $currentStep == '2' ){
// Ask Next Question
$message_to_reply = "Thank you! What's your email address?";
$message_to_reply = '"text":"'.$message_to_reply.'"';
} elseif( $currentStep == '3' ){
// Ask Next Question
$message_to_reply = "Thank you! What's your address?";
$message_to_reply = '"text":"'.$message_to_reply.'"';
}
So i working on my Facebook Messenger Bot.
I want to know ho can i catch a answer for a question like
Bot: Enter your E-mail
User: enters e-mail
Bot: adress was added
My code looks like the sample app from Facebook
app.post('/webhook', function (req, res) {
var data = req.body;
// Make sure this is a page subscription
if (data.object == 'page') {
// Iterate over each entry
// There may be multiple if batched
data.entry.forEach(function(pageEntry) {
var pageID = pageEntry.id;
var timeOfEvent = pageEntry.time;
// Iterate over each messaging event
pageEntry.messaging.forEach(function(messagingEvent) {
if (messagingEvent.optin) {
receivedAuthentication(messagingEvent);
} else if (messagingEvent.message) {
receivedMessage(messagingEvent);
} else if (messagingEvent.delivery) {
receivedDeliveryConfirmation(messagingEvent);
} else if (messagingEvent.postback) {
receivedPostback(messagingEvent);
} else {
console.log("Webhook received unknown messagingEvent: ", messagingEvent);
}
});
});
// Assume all went well.
//
// You must send back a 200, within 20 seconds, to let us know you've
// successfully received the callback. Otherwise, the request will time out.
res.sendStatus(200);
}
});
You can set a flag for their ID that the E-Mail prompt was sent, and then after they respond check to see if it's an E-mail, and if so, then save it and echo it back to them.
If the bot is based on question/answer, what I normally do to handle response tracking is treat the bot like a finite state automata. Assign every "state" your bot can be in to some unique state identifier, and use said state identifier to determine what the user is replying to. You could also store callbacks instead of state ids, but high level this will behave the same way.
For Example:
First define a finite automata. In this case, lets assume it's:
0 --> 1 --> 2
Where 0 means new user, 1 means waiting for email response, 2 means user successfully completed registration.
User messages bot
We check our database and see it's a new user. We assume
state==0.
Because state is 0, we ignore what was sent and prompt for email
Change state to 1 to denote the email was prompted.
User replies with email.
We check database and see state==1. We use the "1" routine to do fancy stuff to verify the email and store it.
Change state to 2 to denote the email was received and the program has ended.
Note:
If the conversation id for the platform you're targeting is reset
after a certain amount of inactivity (or if you just want the bot to
mimic real conversations), store the time of each user's last
interaction and purge all inactive conversations well after the
conversation has been terminated.