Basic socket.io event is working.

package.json

@@ -15,6 +15,7 @@
     "passport-local": "^1.0.0",
     "pg": "^4.4.3",
     "serve-favicon": "^2.3.0",
+    "socket.io": "^1.5.1",
     "sqlite3": "^3.0.8",
     "winston": "^2.1.1"
   },

server.js

@@ -140,6 +140,16 @@ app.get('/logout', function(req, res){
     res.redirect('/');
 });
 
-app.listen(3000, function() {
+var http = require('http').Server(app);
+var io = require('socket.io')(http);
+
+io.on('connection', function(socket){
+    //winston.info('a user connected');
+    socket.on('cm-save', function(msg){
+        winston.info(msg);
+    });
+});
+
+http.listen(3000, function() {
     winston.info("Started on PORT 3000");
 });

views/index.hbs

@@ -16,6 +16,7 @@
 <script src="mode/markdown/markdown.js"></script>
 <script src="addon/edit/matchbrackets.js"></script>
 <script src="keymap/vim.js"></script>
+<script src="https://cdn.socket.io/socket.io-1.4.5.js"></script>
 <style type="text/css">
     html, body { height: 100%; margin: 0; padding: 0; }
     .wrap {
@@ -67,7 +68,11 @@
     // This no worky, there's no concept of <leader> in CodeMirror, but i was hoping this would work-around it.
     //CodeMirror.Vim.map(' c', '<Esc>o- [ ] ', 'normal')
     //CodeMirror.Vim.map(' x', '<ESC>;s/\[\s\]/[x]/g<CR>;noh<CR>', 'normal')
-    //CodeMirror.commands.save = function(){ alert("Saving"); }
+    CodeMirror.commands.save = function(){
+        //alert("Saving");
+        var socket = io();
+        socket.emit('cm-save', 'codemirror save event');
+    }
 
     var typingTimer;
     editor.on("changes", function() {