Merge pull request NARKOZ#93 from kashyapakshay/master

NodeJS for fucking_coffee to trigger using Yo.

Author: NARKOZ

nodejs/fucking_coffee_yo_server.js

@@ -0,0 +1,83 @@
+#!/usr/bin/env node
+
+/* Before running:
+        Setup Yo Callback URL and Yo username for coffee machine:
+        http://docs.justyo.co/docs/receiving-a-yo-with-the-api
+*/
+
+var exec = require('child_process').exec;
+var telnet = require('telnet-client');
+
+var ME = 'my_username';
+var AUTHORIZED_YO_NAMES = [ME];
+var COFFEE_MACHINE_YO_NAME = 'coffeemachine';
+
+// These should be same as what you set up in the Yo API
+var CALLBACK_URL = 'http://xxx.com';
+var CALLBACK_ENDPOINT = '/coffeemachine';
+
+var PORT = '3000';
+
+exec("who -q", function(error, stdout, stderr) {
+
+    var express = require('express');
+    var coffeeApp = express();
+
+    // Exit if no sessions with my username are found
+    if(stdout.indexOf(ME) == -1)
+        process.exit(1);
+
+    // Got a Yo!
+    coffeeApp.get(CALLBACK_ENDPOINT, function (req, res) {
+
+        if(req.query.username === undefined) {
+            // Not a Yo, don't make coffee.
+            res.sendStatus(401);
+        }
+        else if(AUTHORIZED_YO_NAMES.indexOf(req.query.username) == -1) {
+            // If authorized users didn't Yo, don't make coffee.
+            res.sendStatus(401);
+
+            console.log(req.query.username + ' YO\'d.')
+        }
+        else {
+            res.sendStatus(200);
+
+            var coffee_machine_ip = 'xxx.xxx.xxx.xxx';
+            var password = 'xxxx';
+            var con = new telnet();
+
+            con.on('ready', function(prompt) {
+                con.exec('Password: ' + password, function(error, res) {
+
+                    // Brew Coffee!
+                    con.exec('sys brew', function(error, res) {
+
+                        // Wait for 24s
+                        setTimeout(function() {
+
+                            // Pour Coffee!
+                            con.exec('sys pour', function(error, res) {
+                                con.end();
+                            });
+                        }, 24000);
+                    });
+                });
+            });
+
+            con.connect({host: coffee_machine_ip});
+        }
+    });
+
+    // Not Callback endpoint
+    coffeeApp.get('/*', function (req, res) {
+        res.sendStatus(404);
+    });
+
+    var coffeeServer = coffeeApp.listen(PORT, CALLBACK_URL, function() {
+        console.log('Coffee Server listening at %s:%s',
+            CALLBACK_URL, PORT);
+        console.log('\nYo Callback URL: %s:%s/%s', 
+            CALLBACK_URL, PORT, CALLBACK_ENDPOINT);
+    });
+});