add hide similar post button

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

@@ -62,27 +62,38 @@ initializeFollowDiscussion = (discussion) ->
       $local(".discussion-new-post").show()
 
     handleSimilarPost = (elem) ->
-      Discussion.safeAjax
-        $elem: $(elem)
-        url: Discussion.urlFor 'search_similar_threads', id
-        type: "GET"
-        dateType: 'json'
-        data:
-          text: $local(".new-post-title").val()
-        success: (response, textStatus) ->
-          $wrapper = $local(".new-post-similar-posts-wrapper")
-          $similarPosts = $local(".new-post-similar-posts")
-          $similarPosts.empty()
-          if $.type(response) == "array" and response.length
-            $wrapper.show()
-            for thread in response
-              #singleThreadUrl = Discussion.urlFor 'retrieve_single_thread 
-              $similarPost = $("<a>").addClass("similar-post")
-                                     .html(thread["title"])
-                                     .attr("href", "javascript:void(0)") #TODO
-                                     .appendTo($similarPosts)
-          else
-            $wrapper.hide()
+      $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
+          type: "GET"
+          dateType: 'json'
+          data:
+            text: $local(".new-post-title").val()
+          success: (response, textStatus) ->
+            console.log "request"
+            $similarPosts.empty()
+            if $.type(response) == "array" and response.length
+              $wrapper.show()
+              for thread in response
+                #singleThreadUrl = Discussion.urlFor 'retrieve_single_thread 
+                $similarPost = $("<a>").addClass("similar-post")
+                                       .html(thread["title"])
+                                       .attr("href", "javascript:void(0)") #TODO
+                                       .appendTo($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>