add hide similar post button

lms/static/coffee/src/discussion/discussion.coffee

@@ -62,6 +62,15 @@ initializeFollowDiscussion = (discussion) ->
       $local(".discussion-new-post").show()
 
     handleSimilarPost = (elem) ->
+      $title = $local(".new-post-title")
+      $wrapper = $local(".new-post-similar-posts-wrapper")
+      $similarPosts = $local(".new-post-similar-posts")
+      prevText = $title.attr("prev-text")
+      text = $title.val()
+      if text == prevText
+        if $local(".similar-post").length
+          $wrapper.show()
+      else if $.trim(text).length
         Discussion.safeAjax
           $elem: $(elem)
           url: Discussion.urlFor 'search_similar_threads', id
@@ -70,8 +79,7 @@ initializeFollowDiscussion = (discussion) ->
           data:
             text: $local(".new-post-title").val()
           success: (response, textStatus) ->
-          $wrapper = $local(".new-post-similar-posts-wrapper")
-          $similarPosts = $local(".new-post-similar-posts")
+            console.log "request"
             $similarPosts.empty()
             if $.type(response) == "array" and response.length
               $wrapper.show()
@@ -83,6 +91,9 @@ initializeFollowDiscussion = (discussion) ->
                                        .appendTo($similarPosts)
             else
               $wrapper.hide()
+      else
+        $wrapper.hide()
+      $title.attr("prev-text", text)
 
     handleNewPost = (elem) ->
       newPostForm = $local(".new-post-form")
@@ -102,6 +113,9 @@ initializeFollowDiscussion = (discussion) ->
         $local(".new-post-title").blur ->
           handleSimilarPost(this)
 
+        $local(".hide-similar-posts").click ->
+          $local(".new-post-similar-posts-wrapper").hide()
+
         $local(".discussion-submit-post").click ->
           handleSubmitNewPost(this)
         $local(".discussion-cancel-post").click ->

lms/static/coffee/src/discussion/templates.coffee

@@ -11,7 +11,7 @@ Discussion = @Discussion
       <ul class="discussion-errors"></ul>    
       <input type="text" class="new-post-title title-input" placeholder="Title"/>
       <div class="new-post-similar-posts-wrapper" style="display: none">
-        Do you mean...
+        Do you mean... <a class="hide-similar-posts" href="javascript:void(0)">No you got it wrong lol</a>
         <div class="new-post-similar-posts"></div>
       </div>
       <div class="new-post-body body-input"></div>