From 1ff5e06525d0d047e51f835770f252cada7fcebf Mon Sep 17 00:00:00 2001
From: Toby Zerner <toby.zerner@gmail.com>
Date: Mon, 15 Jun 2015 08:59:57 +0930
Subject: [PATCH] Don't add duplicate posts to a discussion

---
 js/forum/src/components/post-stream.js | 2 +-
 js/lib/models/discussion.js            | 6 +++++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/js/forum/src/components/post-stream.js b/js/forum/src/components/post-stream.js
index d92229710..61996411b 100644
--- a/js/forum/src/components/post-stream.js
+++ b/js/forum/src/components/post-stream.js
@@ -88,7 +88,7 @@ class PostStream extends mixin(Component, evented) {
     stream is not visible.
    */
   pushPost(post) {
-    if (this.visibleEnd >= this.count() - 1) {
+    if (this.visibleEnd >= this.count() - 1 && this.posts.indexOf(post) === -1) {
       this.posts.push(post);
       this.visibleEnd++;
     }
diff --git a/js/lib/models/discussion.js b/js/lib/models/discussion.js
index ed2cdbeaf..20dee1926 100644
--- a/js/lib/models/discussion.js
+++ b/js/lib/models/discussion.js
@@ -17,7 +17,11 @@ class Discussion extends Model {
       }
 
       if (newData.links && newData.links.addedPosts) {
-        [].push.apply(posts.linkage, newData.links.addedPosts.linkage);
+        newData.links.addedPosts.linkage.forEach(linkage => {
+          if (posts.linkage[posts.linkage.length - 1].id != linkage.id) {
+            posts.linkage.push(linkage);
+          }
+        });
       }
     }
   }