LUIS Wiki Sample

app.js

var restify = require('restify');
var builder = require('botbuilder');
var request = require('request');
var querystring = require('querystring');

// Setup restify
var server = restify.createServer();
server.listen(3990, function () {
   console.log('%s listening at %s', server.name, server.url); 
});

var connector = new builder.ChatConnector(); 

// Define REST endpoint for Bot Framework
server.post('/api/messages', connector.listen());

// Creates our bot.
var bot = new builder.UniversalBot(connector, (session, args) => {
	session.send("I'm sorry, I'm afraid I don't understand %s.", session.message.text);
});

/*
 *	LUIS Recogniser Setup
 *	Sets up a recogniser that uses LUIS to deduce intents.
 */
var luisEndpoint = "LUIS_ENDPOINT"; // Endpoint on the Publish page, without the trailing &q=.
var luisRecogniser = new builder.LuisRecognizer(luisEndpoint); 
bot.recognizer(luisRecogniser); // Assigns the LUIS recogniser to the bot

// Dialogs for each intent that our bot responds to

// Describe intent - uses the Wikipedia Summary API to pull information about the search term.
bot.dialog("WikiSearchDialog", (session, args) => {
	var intent = args.intent; // Extract predicted intent information
	var subject = builder.EntityRecognizer.findAllEntities(intent.entities, "SearchObject"); // Get all entities matching SearchObject
	var subjectValue = (subject.map((entity) => {return entity.entity}).join(" ")).replace("?", ""); // Join them into one string, ignoring ?

	if(subjectValue == "") {
		//No entities were found.
		session.send("Sorry, I couldn't find a search object in your message :(");
	}

	subjectValue = querystring.escape(subjectValue);

	// Query the Wikipedia summary API: https://en.wikipedia.org/api/rest_v1/#!/Page_content/get_page_summary_title
	var wikiGetEndpoint = "https://en.wikipedia.org/api/rest_v1/page/summary/" + subjectValue;
	request(wikiGetEndpoint, (err, resp, body) => {
		var resultObject = JSON.parse(body);
		if(resultObject.title == "Not found.") { // No Wikipedia page or redirect exists.
			session.send("Oops, I can't find that.");
		} else {
			session.send("Here's what I found:");
			session.send(resultObject.extract); // Get summary
			if(resultObject.thumbnail) {
				//If the Wikipedia summary came with a thumbnail, send it.
				session.send("I also found this picture:");
				session.send({
					attachments:[
						{
							contentType: "image/jpg",
							contentUrl: resultObject.thumbnail.source
						}
					]
				})
			}
		}
	});
}).triggerAction({
	matches: "Describe"
});

// Default dialog for the None intent - cases when we don't want our bot to do a search.
bot.dialog("DefaultDialog", (session, args) => {
	session.send("Hello! I'm WikiBot. Try asking me a question like: \"what is football?\"");
}).triggerAction({
	matches: "None"
});