From 2add044e3421793a51c85f9ecae560dd4bbba95b Mon Sep 17 00:00:00 2001
From: Rachael Su <rachaelsu@seattleacademy.org>
Date: Thu, 22 Jan 2015 19:15:21 +0000
Subject: [PATCH] hotcold.js

---
 hotcold.js | 72 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 hotcold.js

diff --git a/hotcold.js b/hotcold.js
new file mode 100644
index 0000000..4f7035f
--- /dev/null
+++ b/hotcold.js
@@ -0,0 +1,72 @@
+// hotcold.js
+
+//Run with: PORT=4348 node  server.js
+//Run with ports below 1024 with sudo: sudo PORT=80 node server.js
+
+// BASE SETUP
+// ==============================================
+
+var express = require('express');
+var app     = express();
+var port    =   process.env.PORT || 4348;
+
+var bodyParser = require('body-parser');
+app.use(bodyParser.json()); // for parsing application/json
+
+var Gpio = require('onoff').Gpio;
+var blueled = new Gpio(17, 'out');
+var greenled = new Gpio(27, 'out');
+var fanled = new Gpio (22, 'out');
+// ROUTES
+// ==============================================
+
+app.post('/echoData', function(req, res){
+  response = JSON.parse(req.body.response);  
+  //console.log(response.activity.creationTimestamp);
+  description = JSON.parse(response.activity.description);
+  summary = description.summary
+  console.log(summary);
+
+  if (summary.indexOf("on the green light")!=-1) {
+    greenled.writeSync(1);
+  }
+  if (summary.indexOf("off the green light")!=-1) {
+    greenled.writeSync(0);
+  }
+  if (summary.indexOf("on the red light")!=-1) {
+    redled.writeSync(1);
+  }
+  if (summary.indexOf("off the red light")!=-1) {
+    redled.writeSync(0);
+  }
+  if (summary.indexOf("hot")!=-1) {
+    fanled.writeSync(1);
+  }
+
+  if (summary.indexOf("cold")!=-1) {
+    fanled.writeSync(0);
+  }
+
+  res.sendStatus(200);
+});
+
+// START THE SERVER
+//getIPAddress from http://stackoverflow.com/questions/3653065/get-local-ip-address-in-node-js/15075395#15075395
+function getIPAddress() {
+  var interfaces = require('os').networkInterfaces();
+  for (var devName in interfaces) {
+    var iface = interfaces[devName];
+
+    for (var i = 0; i < iface.length; i++) {
+      var alias = iface[i];
+      if (alias.family === 'IPv4' && alias.address !== '127.0.0.1' && !alias.internal)
+        return alias.address;
+    }
+  }
+
+  return '0.0.0.0';
+}
+
+// ==============================================
+app.listen(port, getIPAddress());
+console.log('echoMonitor watching ', port, "at  address", getIPAddress());