From 6a3986e58856e883f4249a0e58150bf2d512bbca Mon Sep 17 00:00:00 2001
From: Xaver Maierhofer <xaver.maierhofer@xwissen.info>
Date: Wed, 29 Mar 2017 00:45:52 +0200
Subject: [PATCH] [TASK] Remove instead of add filter twice

---
 lib/datadistributor.js     | 19 +++++++++++++++----
 lib/filters/genericnode.js |  7 ++++++-
 2 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/lib/datadistributor.js b/lib/datadistributor.js
index 32e5c1c..ea0bf75 100644
--- a/lib/datadistributor.js
+++ b/lib/datadistributor.js
@@ -54,10 +54,21 @@ define(['filters/nodefilter'], function (NodeFilter) {
     }
 
     function addFilter(d) {
-      filters.push(d);
-      notifyObservers();
-      d.setRefresh(refresh);
-      refresh();
+      var newItem = true;
+
+      filters.forEach(function (f) {
+        if (f.getKey && f.getKey() === d.getKey()) {
+          removeFilter(f);
+          newItem = false;
+        }
+      });
+
+      if (newItem) {
+        filters.push(d);
+        notifyObservers();
+        d.setRefresh(refresh);
+        refresh();
+      }
     }
 
     function removeFilter(d) {
diff --git a/lib/filters/genericnode.js b/lib/filters/genericnode.js
index cef74c6..ca43a38 100644
--- a/lib/filters/genericnode.js
+++ b/lib/filters/genericnode.js
@@ -49,10 +49,15 @@ define(['helper'], function (helper) {
       };
     }
 
+    function getKey() {
+      return value.concat(name);
+    }
+
     return {
       run: run,
       setRefresh: setRefresh,
-      render: render
+      render: render,
+      getKey: getKey
     };
   };
 });