add leaving group

Co-Authored-By: xxnitram <xxnitram@users.noreply.github.com>

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

@@ -15,13 +15,16 @@ import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
 import org.springframework.web.bind.annotation.*;
 import org.springframework.web.client.RestTemplate;
+import org.springframework.web.context.annotation.SessionScope;
 import org.springframework.web.server.ResponseStatusException;
 
 import javax.annotation.security.RolesAllowed;
 import java.util.ArrayList;
 import java.util.List;
 
+
 @Controller
+@SessionScope
 @RequestMapping("/gruppen2")
 public class Gruppen2Controller {
 
@@ -56,7 +59,7 @@ public class Gruppen2Controller {
         User user = new User(account.getName(), account.getGivenname(), account.getFamilyname(), account.getEmail());
 
         model.addAttribute("account", keyCloakService.createAccountFromPrincipal(token));
-        model.addAttribute("gruppen", userService.getUserGroups(user.getUser_id()));
+        model.addAttribute("gruppen", userService.getUserGroups(user));
         model.addAttribute("user",user);
         return "index";
     }
@@ -125,4 +128,12 @@ public class Gruppen2Controller {
         throw new ResponseStatusException(HttpStatus.NOT_FOUND, "Group not found");
     }
 
+    @RolesAllowed({"ROLE_orga", "ROLE_studentin", "ROLE_actuator)"})
+    @PostMapping("/leaveGroup")
+    public String pLeaveGroup(KeycloakAuthenticationToken token, @RequestParam (value="group_id") Long id) {
+        Account account = keyCloakService.createAccountFromPrincipal(token);
+        controllerService.deleteUser(account, id);
+        System.out.println(id);
+        return "redirect:/gruppen2/";
+    }
 }

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

@@ -9,6 +9,7 @@ import mops.gruppen2.domain.Group;
  * Entfernt ein einzelnes Mitglied einer Gruppe.
  */
 @Getter
+@NoArgsConstructor
 public class DeleteUserEvent extends Event {
     public DeleteUserEvent(Long group_id, String user_id) {
         super(group_id, user_id);

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

@@ -65,4 +65,10 @@ public class ControllerService {
         UpdateRoleEvent updateRoleEvent = new UpdateRoleEvent(group_id,account.getName(),Role.ADMIN);
         eventService.saveEvent(updateRoleEvent);
     }
+
+    public void deleteUser(Account account, Long group_id){
+        DeleteUserEvent deleteUserEvent = new DeleteUserEvent(group_id,account.getName());
+        System.out.println(deleteUserEvent.getGroup_id() + " " + deleteUserEvent.getUser_id());
+        eventService.saveEvent(deleteUserEvent);
+    }
 }

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

@@ -2,13 +2,14 @@ package mops.gruppen2.service;
 
 import mops.gruppen2.domain.Exceptions.EventException;
 import mops.gruppen2.domain.Group;
+import mops.gruppen2.domain.User;
 import mops.gruppen2.domain.event.Event;
 import mops.gruppen2.repository.EventRepository;
 import org.springframework.stereotype.Service;
 
 import java.util.ArrayList;
 import java.util.List;
-
+//Hallo
 @Service
 public class UserService {
 
@@ -22,10 +23,17 @@ public class UserService {
 
     //Test nötig??
 
-    public List<Group> getUserGroups(String user_id) throws EventException {
-        List<Long> group_ids = eventRepository.findGroup_idsWhereUser_id(user_id);
+    public List<Group> getUserGroups(User user) throws EventException {
+        List<Long> group_ids = eventRepository.findGroup_idsWhereUser_id(user.getUser_id());
         List<Event> events =  groupService.getGroupEvents(group_ids);
-        return groupService.projectEventList(events);
+        List<Group> groups = groupService.projectEventList(events);
+        List<Group> newGroups = new ArrayList<>();
+        for (Group group: groups) {
+            if(group.getMembers().contains(user)){
+                newGroups.add(group);
+            }
+        }
+        return newGroups;
     }
 
     public Group getGroupById(Long group_id) throws EventException {