From 04d0f19d9cc3d16f609b7bcf28a3e123f98c1dd2 Mon Sep 17 00:00:00 2001
From: Felix Hamann <felix.hamann@campus.lmu.de>
Date: Wed, 10 Apr 2019 22:51:03 +0200
Subject: [PATCH] implement destroy util function in js utility registry

---
 static/js/services/utilRegistry.js | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/static/js/services/utilRegistry.js b/static/js/services/utilRegistry.js
index a73b914bf..4ffdada2f 100644
--- a/static/js/services/utilRegistry.js
+++ b/static/js/services/utilRegistry.js
@@ -106,8 +106,25 @@
     }
 
     function _destroyUtilInstances(name) {
-      console.log('TODO: destroy util instances', { name });
-      // call destroy on each activeUtilInstance that matches the name
+      activeUtilInstances
+        .map(function(util, index) {
+          return {
+            util: util,
+            index: index,
+          };
+        }).filter(function(activeUtil) {
+          // find utils instances to destroy
+          return activeUtil.util.name === name;
+        }).forEach(function(activeUtil) {
+          // destroy util instance
+          activeUtil.util.destroy();
+          delete activeUtilInstances[activeUtil.index];
+        });
+
+      // get rid of now empty array slots
+      activeUtilInstances = activeUtilInstances.filter(function(util) {
+        return !!util;
+      })
     }
 
     // public API