app-constants.js

// author: Gary A. Stafford
// site: https://programmaticponderings.com
// license: MIT License
// description: Azure Tech Facts LUIS-enabled Chatbot

'use strict';

/*-----------------------------------------------------------------------------
A simple Language Understanding (LUIS) bot for the Microsoft Bot Framework.
-----------------------------------------------------------------------------*/

/* CONSTANTS AND GLOBAL VARIABLES */

const restify = require('restify');
const builder = require('botbuilder');
const botbuilder_azure = require("botbuilder-azure");
const mongoClient = require('mongodb').MongoClient;

const COSMOS_DB_CONN_STR = process.env.COSMOS_DB_CONN_STR;
const DB_COLLECTION = "azuretechfacts";
const ICON_STORAGE_URL = process.env.ICON_STORAGE_URL;

// Setup Restify Server
const server = restify.createServer();
server.listen(process.env.port || process.env.PORT || 3978, function () {
    console.log('%s listening to %s', server.name, server.url);
});

// Create chat connector for communicating with the Bot Framework Service
const connector = new builder.ChatConnector({
    appId: process.env.MicrosoftAppId,
    appPassword: process.env.MicrosoftAppPassword,
    openIdMetadata: process.env.BotOpenIdMetadata
});

// Listen for messages from users
server.post('/api/messages', connector.listen());

/*----------------------------------------------------------------------------------------
* Bot Storage: This is a great spot to register the private state storage for your bot.
* We provide adapters for Azure Table, CosmosDb, SQL Azure, or you can implement your own!
* For samples and documentation, see: https://github.com/Microsoft/BotBuilder-Azure
* ---------------------------------------------------------------------------------------- */

const tableName = 'botdata';
const azureTableClient = new botbuilder_azure.AzureTableClient(tableName, process.env['AzureWebJobsStorage']);
const tableStorage = new botbuilder_azure.AzureBotStorage({gzipData: false}, azureTableClient);

// Create your bot with a function to receive messages from the user
// This default message handler is invoked if the user's utterance doesn't
// match any intents handled by other dialogs.
const bot = new builder.UniversalBot(connector, function (session, args) {
    const DEFAULT_RESPONSE = `Sorry, I didn't understand: _'${session.message.text}'_.`;
    session.send(DEFAULT_RESPONSE).endDialog();
});

bot.set('storage', tableStorage);

// Make sure you add code to validate these fields
const luisAppId = process.env.LuisAppId;
const luisAPIKey = process.env.LuisAPIKey;
const luisAPIHostName = process.env.LuisAPIHostName || 'westus.api.cognitive.microsoft.com';
const LuisModelUrl = 'https://' + luisAPIHostName + '/luis/v2.0/apps/' + luisAppId + '?subscription-key=' + luisAPIKey;

// Create a recognizer that gets intents from LUIS, and add it to the bot
const recognizer = new builder.LuisRecognizer(LuisModelUrl);
bot.recognizer(recognizer);