Clean up server

package.json

@@ -1,13 +1,9 @@
 {
-  "name": "pubsub-with-backbone-events",
+  "name": "graph-data-with-firebase",
   "version": "0.0.1",
   "dependencies": {
     "express": "~3.4.7",
-    "body-parser": "~1.13.1",
-    "mongoose": "~4.1.2",
-    "socket.io": "~1.3.6",
-    "bower": "~1.4.1",
-    "extend": "~3.0.0"
+    "bower": "~1.4.1"
   },
   "engines": {
     "node": ">=0.10.25"

server.js

@@ -1,156 +1,7 @@
+var express      = require('express');
 
-var express    = require('express'),
-    mongoose   = require('mongoose'),
-    bodyParser = require('body-parser'),
-    app    = express(),
-    http   = require('http').Server(app),
-    io     = require('socket.io')(http),
-    extend = require('extend'),
-
-    // Mongoose Schema definition
-    Edge = mongoose.model('Edge', {
-      id: String,
-      source: {
-        id: String,
-        weight: Number
-      },
-      target: {
-        id: String,
-        weight: Number
-      }
-    }),
-
-    Vertex = mongoose.model('Vertex', {
-      id: String,
-      color: String,
-      label: String
-    });
-
-/*
- * I’m sharing my credential here.
- * Feel free to use it while you’re learning.
- * After that, create and use your own credential.
- * Thanks.
- *
- * COMPOSE_URI=mongodb://example:example@dogen.mongohq.com:10089/graph
- * COMPOSE_URI=mongodb://example:example@127.0.0.1:27017/graph
- * 'mongodb://example:example@dogen.mongohq.com:10089/graph'
- */
-mongoose.connect(process.env.COMPOSE_URI, function (error) {
-    if (error) console.error(error);
-    else console.log('mongo connected');
-});
-/** END */
-
-
-app
+var app = express()
   .use(express.static(__dirname + '/'))
-  // https://scotch.io/tutorials/use-expressjs-to-get-url-and-post-parameters
-  .use(bodyParser.json()) // support json encoded bodies
-  .use(bodyParser.urlencoded({ extended: true })) // support encoded bodies
-  ;
-
-http.listen(process.env.PORT || 5000, function(){
-  console.log('listening on *:5000');
-});
-
-io.on('connection', function(socket) {
-
-  function removeLinkIfNodeWasDeleted(linkId, nodeId) {
-    Vertex.findById( nodeId, function(err, vertex) {
-      if (vertex) {
-        return;
-      }
-      Edge.findById(linkId, function(err, link) {
-        link.remove();
-      });
-    } );
-  }
-
-  function cleanUpLinkIfNeeded(link) {
-    removeLinkIfNodeWasDeleted( link.id, link.source.id );
-    removeLinkIfNodeWasDeleted( link.id, link.target.id );
-  }
-
-  console.log('a user connected');
-  socket.on('disconnect', function(){
-    console.log('user disconnected');
-  });
-
-  socket.on('retrieve-all-nodes', function() {
-    Vertex.find( function( err, nodes) {
-      nodes.forEach(function(node) {
-        node.id = node._id;
-        socket.emit( 'node-added', node );
-      });
-      Edge.find( function(err, links) {
-        links.forEach(function(link) {
-          link.id = link._id;
-          socket.emit( 'link-added', link );
-          cleanUpLinkIfNeeded( link );
-        });
-      } );
-    });
+  .listen(process.env.PORT || 5000, function() {
+    console.log('listening on *:' + (process.env.PORT || 5000) );
   });
-
-  // socket.on('remove-all-nodes', function() {
-  // ...
-  // });
-
-  socket.on('add-node', function( node, cb ) {
-    var vertex = new Vertex( node );
-    node.id = vertex._id;
-    vertex.save(function (err) {
-      cb && cb(node);
-      socket.broadcast.emit( 'node-added', node );
-      socket.emit( 'node-added', node );
-    });
-  });
-
-  socket.on('edit-node', function(node) {
-    if (node && node.id) {
-      Vertex.findById( node.id, function (err, vertex) {
-        vertex.label = node.label;
-        vertex.color = node.color;
-        vertex.save( function(err) {
-          socket.emit( 'node-edited', node );
-          socket.broadcast.emit( 'node-edited', node );
-        });
-      } );
-    }
-  } );
-
-  socket.on('remove-node', function(node) {
-    if (node && node.id) {
-      Vertex.findById( node.id, function(err, vertex) {
-        vertex.remove( function(err) {
-          socket.emit( 'node-removed', node );
-          socket.broadcast.emit( 'node-removed', node );
-        });
-      } );
-    }
-  });
-
-  socket.on('add-link', function(link, cb) {
-    var edge = new Edge( link );
-    link.id = edge._id;
-    edge.save( function(err) {
-      cb && cb(link);
-      socket.broadcast.emit( 'link-added', link );
-      socket.emit( 'link-added', link );
-    } );
-  });
-
-  socket.on('remove-link', function(link) {
-    if (link && link.id) {
-      Edge.findById( link.id, function(err, edge) {
-        edge.remove( function(err) {
-          socket.broadcast.emit( 'link-removed', link );
-          socket.emit( 'link-removed', link );
-        } );
-      });
-    }
-  });
-
-});
-