From a8f41b8c575062456ba017f830a352c171926b05 Mon Sep 17 00:00:00 2001
From: Ansis Brammanis <ansis.brammanis@gmail.com>
Date: Fri, 5 Apr 2013 16:35:51 -0400
Subject: [PATCH] Prevent creation of ways with duplicate nodes

Related to #1249
---
 js/id/behavior/draw_way.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/js/id/behavior/draw_way.js b/js/id/behavior/draw_way.js
index 731260dbb..3b9e3d322 100644
--- a/js/id/behavior/draw_way.js
+++ b/js/id/behavior/draw_way.js
@@ -113,6 +113,11 @@ iD.behavior.DrawWay = function(context, wayId, index, mode, baseGraph) {
 
     // Accept the current position of the temporary node and continue drawing.
     drawWay.add = function(loc) {
+
+        // prevent duplicate nodes
+        var last = context.entity(way.nodes[way.nodes.length - (isArea ? 2 : 1)]);
+        if (last && last.loc[0] === loc[0] && last.loc[1] === loc[1]) return;
+
         var newNode = iD.Node({loc: loc});
 
         context.replace(