CORD-833 Prevent duplication of navigation routes

Change-Id: Idbd797976080a3d7b29912950c687f1b0fcb67e1
diff --git a/src/app/core/services/navigation.ts b/src/app/core/services/navigation.ts
index 31f2b4e..e35c9f8 100644
--- a/src/app/core/services/navigation.ts
+++ b/src/app/core/services/navigation.ts
@@ -18,10 +18,11 @@
 }
 
 export class NavigationService {
-  static $inject = ['StyleConfig'];
+  static $inject = ['$log', 'StyleConfig'];
   private routes: IXosNavigationRoute[];
 
   constructor(
+    private $log: ng.ILogService,
     private StyleConfig: IXosStyleConfig
   ) {
     const defaultRoutes = [
@@ -51,6 +52,18 @@
       throw new Error('[XosNavigation] You can\'t provide both state and url');
     }
 
+    const routeExist = _.findIndex(this.routes, (r: IXosNavigationRoute) => {
+      if (r.label === route.label && r.state === route.state && r.parent === route.parent) {
+        return true;
+      }
+      return false;
+    }) > -1;
+
+    if (routeExist) {
+      this.$log.warn(`[XosNavigation] Route with label: ${route.label}, state: ${route.state} and parent: ${route.parent} already exist`);
+      return;
+    }
+
 
     if (angular.isDefined(route.parent)) {
       // route parent should be a state for now