start getting browserify-express hooked up to expose a shared IOB module

.gitignore

@@ -1,6 +1,9 @@
 bower_components/
 node_modules/
 
+
+bundle/bundle.out.js
+
 .idea/
 *.iml
 my.env

bundle/bundle.source.js

@@ -0,0 +1,12 @@
+(function () {
+
+    window.Nightscout = window.Nightscout || {};
+
+    window.Nightscout = {
+        iob: require('../lib/iob')()
+    };
+
+    console.info("Nightscout bundle ready", window.Nightscout);
+
+})();
+

lib/iob.js

@@ -0,0 +1,81 @@
+'use strict';
+
+function iobTotal(treatments, profile, time) {
+    var iob= 0;
+    var activity = 0;
+    if (!treatments) return {};
+    if (typeof time === 'undefined') {
+        time = new Date();
+    }
+
+    treatments.forEach(function(treatment) {
+        if(treatment.created_at < time) {
+            var tIOB = iobCalc(treatment, profile, time);
+            if (tIOB && tIOB.iobContrib) iob += tIOB.iobContrib;
+            if (tIOB && tIOB.activityContrib) activity += tIOB.activityContrib;
+        }
+    });
+    return {
+        iob: iob,
+        activity: activity
+    };
+}
+
+function iobCalc(treatment, profile, time) {
+
+    var dia=profile.dia;
+    var scaleFactor = 3.0/dia;
+    var peak = 75;
+    var sens=profile.sens;
+    var iobContrib, activityContrib;
+    var t = time;
+    if (typeof t === 'undefined') {
+        t = new Date();
+    }
+
+
+    if (treatment.insulin) {
+        var bolusTime=new Date(treatment.created_at);
+        var minAgo=scaleFactor*(t-bolusTime)/1000/60;
+
+        if (minAgo < 0) {
+            iobContrib=0;
+            activityContrib=0;
+        }
+        if (minAgo < peak) {
+            var x = minAgo/5+1;
+            iobContrib=treatment.insulin*(1-0.001852*x*x+0.001852*x);
+            activityContrib=sens*treatment.insulin*(2/dia/60/peak)*minAgo;
+
+        }
+        else if (minAgo < 180) {
+            var x = (minAgo-75)/5;
+            iobContrib=treatment.insulin*(0.001323*x*x - .054233*x + .55556);
+            activityContrib=sens*treatment.insulin*(2/dia/60-(minAgo-peak)*2/dia/60/(60*dia-peak));
+        }
+        else {
+            iobContrib=0;
+            activityContrib=0;
+        }
+        return {
+            iobContrib: iobContrib,
+            activityContrib: activityContrib
+        };
+    } else {
+        return '';
+    }
+}
+
+function IOB(opts) {
+
+    var IOB = {
+        total: iobTotal
+    };
+
+    return IOB;
+
+}
+
+if (window) window.IOB = IOB;
+
+module.exports = IOB;

package.json

@@ -43,7 +43,8 @@
     "pushover-notifications": "0.2.0",
     "sgvdata": "0.0.2",
     "socket.io": "^0.9.17",
-    "git-rev": "git://github.com/bewest/git-rev.git"
+    "git-rev": "git://github.com/bewest/git-rev.git",
+    "browserify-express": "^0.1.4"
   },
   "devDependencies": {
     "istanbul": "~0.3.5",

server.js

@@ -82,6 +82,19 @@ var staticFiles = express.static(env.static_files, {maxAge: 60 * 60 * 1000});
 // serve the static content
 app.use(staticFiles);
 
+var browserify_express = require('browserify-express');
+var bundle = browserify_express({
+    entry: __dirname + '/bundle/bundle.source.js',
+    watch: __dirname + '/lib/',
+    mount: '/public/js/bundle.js',
+    verbose: true,
+    //minify: true,
+    bundle_opts: { debug: true }, // enable inline sourcemap on js files
+    write_file: __dirname + '/bundle/bundle.out.js'
+});
+
+app.use(bundle);
+
 // Handle errors with express's errorhandler, to display more readable error messages.
 var errorhandler = require('errorhandler');
 //if (process.env.NODE_ENV === 'development') {

static/index.html

@@ -220,6 +220,7 @@ <h1 class="customTitle">Nightscout</h1>
             <audio src="/audio/alarm2.mp3" preload="auto" loop="true" class="urgent alarm2 mp3" type="audio/mp3"></audio>
         </div>
 
+        <script src="/public/js/bundle.js"></script>
         <script src="/socket.io/socket.io.js"></script>
         <script src="/api/v1/status.js"></script>
         <script src="/bower_components/d3/d3.min.js"></script>