add DeleteGoup function

Co-Authored-By: Talha Caliskan <killerber4t@users.noreply.github.com>

src/main/java/mops/gruppen2/controller/Gruppen2Controller.java

@@ -174,6 +174,9 @@ public class Gruppen2Controller {
         User user = new User(account.getName(), account.getGivenname(), account.getFamilyname(), account.getEmail());
         Long parentId = group.getParent();
         Group parent = new Group();
+        if(group.getTitle() == null){
+            throw new GroupNotFoundException(this.getClass().toString());
+        }
         if (parentId != null) {
             parent = userService.getGroupById(parentId);
         }
@@ -247,6 +250,15 @@ public class Gruppen2Controller {
         return "redirect:/gruppen2/";
     }
 
+    @RolesAllowed({"ROLE_orga", "ROLE_studentin", "ROLE_actuator"})
+    @PostMapping("/deleteGroup")
+    public String pDeleteGroup(KeycloakAuthenticationToken token, @RequestParam("group_id") Long groupId){
+        Account account = keyCloakService.createAccountFromPrincipal(token);
+        User user = new User(account.getName(), account.getGivenname(), account.getFamilyname(), account.getEmail());
+        controllerService.deleteGroupEvent(user, groupId);
+        return "redirect:/gruppen2/";
+    }
+
     @RolesAllowed({"ROLE_orga", "ROLE_studentin", "ROLE_actuator)"})
     @GetMapping("/details/members/{id}")
     public String editMembers(Model model, KeycloakAuthenticationToken token, @PathVariable("id") Long groupId) throws EventException {

src/main/java/mops/gruppen2/domain/event/Event.java

@@ -21,6 +21,7 @@ import mops.gruppen2.domain.exception.GroupIdMismatchException;
                       @JsonSubTypes.Type(value = UpdateGroupDescriptionEvent.class, name = "UpdateGroupDescriptionEvent"),
                       @JsonSubTypes.Type(value = UpdateGroupTitleEvent.class, name = "UpdateGroupTitleEvent"),
                       @JsonSubTypes.Type(value = UpdateRoleEvent.class, name = "UpdateRoleEvent"),
+                      @JsonSubTypes.Type(value = DeleteGroupEvent.class, name = "DeleteGroupEvent")
               })
 @Getter
 @NoArgsConstructor

src/main/java/mops/gruppen2/service/GroupService.java

@@ -102,6 +102,9 @@ public class GroupService {
         List<Group> visibleGroups = projectEventList(eventsVisible);
         List<Group> visibleLectures = new ArrayList<>();
         for (Group group : visibleGroups) {
+            if(group.getType() == null){
+                continue;
+            }
             if (group.getType().equals(GroupType.LECTURE)) {
                 visibleLectures.add(group);
             }
@@ -121,6 +124,9 @@ public class GroupService {
     public List<Group> findGroupWith(String search, Account account) throws EventException {
         List<Group> groups = new ArrayList<>();
         for (Group group : getAllGroupWithVisibilityPublic(account.getName())) {
+            if(group.getType() == null){
+                continue;
+            }
             if (group.getTitle().toLowerCase().contains(search.toLowerCase()) || group.getDescription().toLowerCase().contains(search.toLowerCase())) {
                 groups.add(group);
             }

src/main/resources/templates/detailsMember.html

@@ -59,6 +59,12 @@
                                 type="submit">Gruppe verlassen
                         </button>
                     </form>
+                    <form action="/gruppen2/deleteGroup" method="post">
+                        <button class="btn btn-danger" style="border-style: none; margin: 5px"
+                                th:name="group_id" th:value="${group.getId()}"
+                                type="submit">Gruppe löschen
+                        </button>
+                    </form>
                 </div>
             </div>
             <div class="col-3" style="white-space: nowrap">