Merge branch 'dev/Warn_when_a_depended-on_System_is_missing' of git://github.com/gintau/codecombat into gintau-dev/Warn_when_a_depended-on_System_is_missing

app/views/editor/components/main.coffee

@@ -3,6 +3,7 @@ template = require 'templates/editor/components/main'
 
 Level = require 'models/Level'
 LevelComponent = require 'models/LevelComponent'
+LevelSystem = require 'models/LevelSystem'
 ComponentsCollection = require 'collections/ComponentsCollection'
 ComponentConfigView = require './config'
 
@@ -157,6 +158,18 @@ module.exports = class ThangComponentEditView extends CocoView
     @reportChanges()
 
   onAddComponentEnterPressed: (node) =>
+    extantSystems = 
+      (@supermodel.getModelByOriginalAndMajorVersion LevelSystem, sn.original, sn.majorVersion).attributes.name.toLowerCase() for idx, sn of @level.get('systems')
+    requireSystem = node.data.system.toLowerCase()
+
+    if requireSystem not in extantSystems
+      warn_element = 'Component <b>' + node.data.name + '</b> requires system <b>' + requireSystem + '</b> which is currently not specified in this level.'
+      noty({
+        text: warn_element,
+        layout: 'bottomLeft',
+        type: 'warning'
+      })
+      
     currentSelection = @addComponentsTreema?.getLastSelectedTreema()?.data._id
 
     id = node.data._id