abfangen von wenn letzter admin nicht mehr

Co-Authored-By: kasch309 <kasch309@users.noreply.github.com>
Co-Authored-By: andibuls <andibuls@users.noreply.github.com>
Co-Authored-By: xxnitram <xxnitram@users.noreply.github.com>

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

@@ -226,6 +226,14 @@ public class Gruppen2Controller {
     @PostMapping("/details/members/changeRole")
     public String changeRole(KeycloakAuthenticationToken token, @RequestParam("group_id") Long groupId,
                              @RequestParam("user_id") String userId) throws EventException {
+
+
+        Account account = keyCloakService.createAccountFromPrincipal(token);
+        if (userId.equals(account.getName())) {
+            controllerService.passIfLastAdmin(account, groupId);
+            controllerService.updateRole(userId, groupId);
+            return "redirect:/gruppen2/details/" + groupId;
+        }
         controllerService.updateRole(userId, groupId);
         return "redirect:/gruppen2/details/members/" + groupId;
     }

src/main/java/mops/gruppen2/domain/User.java

@@ -3,14 +3,16 @@ package mops.gruppen2.domain;
 import lombok.AllArgsConstructor;
 import lombok.EqualsAndHashCode;
 import lombok.Getter;
+import lombok.NoArgsConstructor;
 
 @Getter
 @AllArgsConstructor
+@NoArgsConstructor
 @EqualsAndHashCode(exclude = {"givenname", "familyname", "email"})
 public class User {
 
-    private final String id;
-    private final String givenname;
-    private final String familyname;
-    private final String email;
+    private String id;
+    private String givenname;
+    private String familyname;
+    private String email;
 }

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

@@ -13,13 +13,19 @@ import mops.gruppen2.domain.event.UpdateGroupDescriptionEvent;
 import mops.gruppen2.domain.event.UpdateGroupTitleEvent;
 import mops.gruppen2.domain.event.UpdateRoleEvent;
 import mops.gruppen2.domain.exception.EventException;
+import mops.gruppen2.domain.exception.NoAdminAfterActionExeption;
 import mops.gruppen2.domain.exception.UserNotFoundException;
 import mops.gruppen2.security.Account;
+import org.keycloak.adapters.springsecurity.token.KeycloakAuthenticationToken;
 import org.springframework.stereotype.Service;
+import springfox.documentation.schema.Entry;
 
 import java.util.List;
+import java.util.Map;
 import java.util.UUID;
 
+import static mops.gruppen2.domain.Role.ADMIN;
+
 
 @Service
 public class ControllerService {
@@ -104,10 +110,10 @@ public class ControllerService {
             throw new UserNotFoundException(this.getClass().toString());
         }
 
-        if (group.getRoles().get(user.getId()) == Role.ADMIN) {
+        if (group.getRoles().get(user.getId()) == ADMIN) {
             updateRoleEvent = new UpdateRoleEvent(groupId, user.getId(), Role.MEMBER);
         } else {
-            updateRoleEvent = new UpdateRoleEvent(groupId, user.getId(), Role.ADMIN);
+            updateRoleEvent = new UpdateRoleEvent(groupId, user.getId(), ADMIN);
         }
         eventService.saveEvent(updateRoleEvent);
     }
@@ -153,4 +159,36 @@ public class ControllerService {
         updateRole(account.getName(), groupId);
         addUserList(users, groupId);
     }
+
+    public void passIfLastAdmin(Account account, Long groupId){
+        Group group = userService.getGroupById(groupId);
+        if (group.getMembers().size() <= 1){
+            throw new NoAdminAfterActionExeption("Du otto bist letzter Admin");
+        }
+
+        if (isLastAdmin(account, group)){
+            String newAdminId = getVeteranMember(account, group);
+            updateRole(newAdminId, groupId);
+        }
+    }
+
+    private boolean isLastAdmin(Account account, Group group){
+        for (Map.Entry<String, Role> entry : group.getRoles().entrySet()){
+            if (entry.getValue().equals(ADMIN)){
+                if (!(entry.getKey().equals(account.getName()))){
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+
+    private String getVeteranMember(Account account, Group group){
+        List<User> mitglieder = group.getMembers();
+        if (mitglieder.get(0).getId().equals(account.getName())){
+            return mitglieder.get(1).getId();
+        }
+        return mitglieder.get(0).getId();
+    }
+
 }