Set Request comment to empty if not submitted; Redirect messages for Room edit/create/delete

src/main/java/nl/tudelft/ewi/queue/controller/AdminController.java

@@ -68,8 +68,9 @@ public class AdminController {
     }
 
     @RequestMapping(value = "/admin/rooms", method = RequestMethod.POST)
-    public String createRoom(Model model, @Valid Room room) {
+    public String createRoom(Model model, @Valid Room room, RedirectAttributes redirectAttributes) {
         roomRepository.save(room);
+        redirectAttributes.addFlashAttribute("message", "Room has been created.");
         return "redirect:/admin/rooms";
     }
 
@@ -84,7 +85,7 @@ public class AdminController {
     @RequestMapping(value = "/admin/room/edit/{id}", method = RequestMethod.POST)
     public String saveRoom(@PathVariable("id") Long id,
                            @RequestParam("map") MultipartFile map,
-                           Room room) throws IOException {
+                           Room room, RedirectAttributes redirectAttributes) throws IOException {
         Room objRoom = roomRepository.findOne(id);
         objRoom.setName(room.getName());
         objRoom.setPlaceholder(room.isPlaceholder());
@@ -93,13 +94,17 @@ public class AdminController {
             objRoom.setMapFilePath(filePath);
         }
         roomRepository.save(objRoom);
+        redirectAttributes.addFlashAttribute("message", "Room has been saved.");
         return "redirect:/admin/rooms";
     }
 
     @RequestMapping(value = "/admin/room/delete", method = RequestMethod.POST)
-    public String deleteRoom(Model model, @RequestParam(value = "id") Long id) {
+    public String deleteRoom(Model model,
+                             @RequestParam(value = "id") Long id,
+                             RedirectAttributes redirectAttributes) {
         Room objRoom = roomRepository.findOne(id);
         roomRepository.delete(objRoom);
+        redirectAttributes.addFlashAttribute("message", "Room has been deleted.");
         return "redirect:/admin/rooms";
     }
 }

src/main/java/nl/tudelft/ewi/queue/controller/RequestController.java

@@ -308,6 +308,8 @@ public class RequestController {
         Room room = roomRepository.findOne(roomId);
         if (comment != null) {
             request.setComment(comment);
+        } else {
+            request.setComment("");
         }
         request.setRoom(room);
         requestRepository.save(request);