added Flowr configuration

app/assets/javascripts/editor.js

@@ -17,7 +17,6 @@ $(function() {
   var active_frame;
   var running = false;
 
-  var flowrUrl = 'http://vm-teusner-webrtc.eaalab.hpi.uni-potsdam.de:3000/api/exceptioninfo?id=&lang=auto';
   var flowrResultHtml = '<div class="panel panel-default"><div id="{{headingId}}" role="tab" class="panel-heading"><h4 class="panel-title"><a data-toggle="collapse" data-parent="#flowrHint" href="#{{collapseId}}" aria-expanded="true" aria-controls="{{collapseId}}"></a></h4></div><div id="{{collapseId}}" role="tabpanel" aria-labelledby="{{headingId}}" class="panel-collapse collapse"><div class="panel-body"></div></div></div>';
 
   var ajax = function(options) {
@@ -133,8 +132,12 @@ $(function() {
     event_source.addEventListener('info', storeContainerInformation);
     event_source.addEventListener('output', callback);
     event_source.addEventListener('start', callback);
-    event_source.addEventListener('output', handleStderrOutputForFlowr);
-    event_source.addEventListener('close', handleStderrOutputForFlowr);
+
+    if ($('#flowrHint').isPresent()) {
+      event_source.addEventListener('output', handleStderrOutputForFlowr);
+      event_source.addEventListener('close', handleStderrOutputForFlowr);
+    }
+
     event_source.addEventListener('status', function(event) {
       showStatus(JSON.parse(event.data));
     });
@@ -616,6 +619,7 @@ $(function() {
 
   var stderrOutput = '';
   var handleStderrOutputForFlowr = function(event) {
+    var flowrUrl = $('#flowrHint').data('url');
     var json = JSON.parse(event.data);
 
     if (json.stderr) {

app/views/exercises/implement.html.slim

@@ -40,11 +40,10 @@ hr
         .panel-body
     #output
       pre = t('.no_output_yet')
-
-    #flowrHint.panel.panel-info(role='tab')
-      .panel-heading = 'Gain more insights here'
-      .panel-body
-
+    - if CodeOcean::Config.new(:code_ocean).read[:flowr][:enabled]
+      #flowrHint.panel.panel-info data-url=CodeOcean::Config.new(:code_ocean).read[:flowr][:url] role='tab'
+        .panel-heading = 'Gain more insights here'
+        .panel-body
   #progress.tab-pane
     #results
       h2 = t('.results')