js_app.js

'use strict';
const http = require('https');
exports.appWebhook = (req, res) => { 
let content = req.body.result.parameters['content']; 
getContent(content).then((output) => {   
res.setHeader('Content-Type', 'application/json');   
res.send(JSON.stringify({ 'speech': output, 'displayText': output    })); 
}).catch((error) => {   
// If there is an error let the user know   
res.setHeader('Content-Type', 'application/json');   
res.send(JSON.stringify({ 'speech': error, 'displayText': error     })); 
});
};
function getSubreddit (content) { 
if (content == "funny" || content == "joke" || content == "laugh")   
return {sub: "jokes", displayText: "joke"};   
else {     
return {sub: "todayILearned", displayText: "fact"};   
}
}
function getContent (content) { 
let subReddit = getSubreddit(content); 
return new Promise((resolve, reject) => {   
console.log('API Request: to Reddit');   
http.get(`https://www.reddit.com/r/${subReddit["sub"]}/top.json?sort=top&t=day`, (resp) => {     
let data = '';     
resp.on('data', (chunk) => {       
data += chunk;     
});     
resp.on('end', () => {       
let response = JSON.parse(data);       
let thread = response["data"]["children"][(Math.floor((Math.random() * 24) + 1))]["data"];       
let output = `Here's a ${subReddit["displayText"]}: ${thread["title"]}`;       
if (subReddit['sub'] == "jokes") {         
output += " " + thread["selftext"];       
}       
output += "\nWhat do you want to hear next, a joke or a fact?"       
console.log(output);       
resolve(output);     
});   
}).on("error", (err) => {     
console.log("Error: " + err.message);     
reject(error);   
}); 
});
}