save dialog

src/app/modules/songs/songs-routing.module.ts

@@ -4,6 +4,7 @@ import {SongComponent} from './song/song.component';
 import {SongListComponent} from './song-list/song-list.component';
 import {EditComponent} from './song/edit/edit.component';
 import {NewComponent} from './song/new/new.component';
+import {EditSongGuard} from './song/edit/edit-song.guard';
 
 
 const routes: Routes = [
@@ -18,7 +19,8 @@ const routes: Routes = [
   },
   {
     path: ':songId/edit',
-    component: EditComponent
+    component: EditComponent,
+    canDeactivate: [EditSongGuard]
   },
   {
     path: ':songId',