From 93ad5508d6044c35e496df42528114ee182f7d69 Mon Sep 17 00:00:00 2001
From: Nihar V Settipalli <niharsettipalli@gmail.com>
Date: Sun, 18 Sep 2011 06:58:23 +0530
Subject: [PATCH] collab server

---
 chat.js          |  4 ++--
 chat_client.html | 19 ++++++++++++++++++-
 editor.js        | 31 +++++++++++++++++++++++++++++++
 3 files changed, 51 insertions(+), 3 deletions(-)
 create mode 100644 editor.js

diff --git a/chat.js b/chat.js
index fbc26a8..17bad43 100644
--- a/chat.js
+++ b/chat.js
@@ -4,7 +4,7 @@ var CHAT_PORT = 3000
 var 
 io = require('socket.io').listen(CHAT_PORT),
 
-io.sockets.on('connection', socketHandler)
+io.sockets.on('connection', socketHandler);
 
 function socketHandler(socket){
 	socket.emit('asking name', {msg:'What\'s your name?'});
@@ -22,5 +22,5 @@ function socketHandler(socket){
 	socket.on('disconnect', function() {
 		io.sockets.emit('message', {name:'GOD', msg:socket.get('name')+' has left the editing session'});
 	});
-}
+};
 
diff --git a/chat_client.html b/chat_client.html
index bc7d9f2..62e526f 100644
--- a/chat_client.html
+++ b/chat_client.html
@@ -1,6 +1,6 @@
 <script src="/socket.io/socket.io.js"></script>
 <script>
-
+var ver = 0;
 var socket = io.connect("http://localhost");
 socket.on('asking name', function(data){
 	console.log(data);
@@ -13,4 +13,21 @@
 	console.log(data.name + ' : ' + data.msg);
 });
 
+function key_handler(key) {
+		
+
+	console.log('{'+cpos+','+ver+','+substr+','+e+ '}');
+	socket.emit('text edit', {cursor:cpos, version:ver, substring:substr, edit:e});
+});
+
+socket.on('text edit', function (data){
+	console.log('text-edit: '+data);
+	var text = acee.getValue();
+
+	text = text.substr(0,data.cpos-1) + data.edit + text.substr(data.cpos -1 + data.edit.length);
+	ver += 1;
+
+	acee.setValue(text);
+});
+
 </script>
diff --git a/editor.js b/editor.js
new file mode 100644
index 0000000..6bfe56e
--- /dev/null
+++ b/editor.js
@@ -0,0 +1,31 @@
+
+var EDITOR_PORT=3001
+
+var version = 0,
+io = require('socket.io').listen(EDITOR_PORT);
+
+class Data {
+	var cursor;
+	var edit;
+};
+
+var history = new Array();
+Data temp;
+
+io.sockets('connection', socketHandler);
+
+function socketHandler(socket) {
+	socket.on('text edit', function(data){
+		temp.cursor = data.cursor;
+		temp.edit = len(data.edit)-len(data.substring);
+		for(int i=version-data.version-1; i>=0; i--) {
+			if(temp.cursor >= history[i].cursor){
+				temp.cursor += history[i].edit;
+			}
+		}
+
+		data.cursor = temp.cursor;
+		history.push(temp);
+		io.sockets.emit('text edit', data);
+	});
+};