Check if the hashtag is a link in function .hashtagify

app/assets/javascripts/app/helpers/text_formatter.js

@@ -108,11 +108,15 @@ $(function() {
   };
 
   textFormatter.hashtagify = function hashtagify(text){
-    var utf8WordCharcters =/(\s|^|>)#([\u0080-\uFFFF|\w|-]+|<3)/g
-    return text.replace(utf8WordCharcters, function(hashtag, preceeder, tagText) {
-      return preceeder + "<a href='/tags/" + tagText.toLowerCase() +
-                         "' class='tag'>#" + tagText + "</a>"
-    })
+    var utf8WordCharcters =/(<a[^>]*>.*?<\/a>)|(\s|^|>)#([\u0080-\uFFFF|\w|-]+|&lt;3)/g;
+
+    return text.replace(utf8WordCharcters, function(result, linkTag, preceeder, tagText) {
+      if(linkTag)
+        return linkTag;
+      else
+        return preceeder + "<a href='/tags/" + tagText.toLowerCase() +
+                           "' class='tag'>#" + tagText + "</a>";
+    });
   };
 
   textFormatter.mentionify = function mentionify(text, mentions) {

spec/javascripts/app/helpers/text_formatter_spec.js

@@ -238,6 +238,25 @@ describe("app.helpers.textFormatter", function(){
 
         expect(formattedText).toContain("/tags/parties")
       })
+
+      it("doesn't create tag if the text is a link", function(){
+        var tags = ['diaspora', 'twitter', 'hrabrahabr'];
+
+        var text = $('<a/>', { href: 'http://me.co' }).html('#me')[0].outerHTML;
+        _.each(tags, function(tagName){
+          text += ' #'+tagName+',';
+        });
+        text += 'I love';
+
+        var formattedText = this.formatter.hashtagify(text);
+        var wrapper = $('<div>').html(formattedText);
+
+        expect(wrapper.find("a[href='http://me.co']").text()).toContain('#me');
+        _.each(tags, function(tagName){
+          expect(wrapper.find("a[href='/tags/"+tagName+"']").text()).toContain('#'+tagName);
+        });
+
+      })
     })
   })