DEAR-125: add securityUtil to get current user

src/main/java/ch/fhnw/deardevbackend/services/TeamMemberService.java

@@ -1,12 +1,12 @@
 package ch.fhnw.deardevbackend.services;
 
 import ch.fhnw.deardevbackend.dto.TeamWithMembersDTO;
-import ch.fhnw.deardevbackend.entities.Role;
 import ch.fhnw.deardevbackend.entities.Team;
 import ch.fhnw.deardevbackend.entities.TeamMemberWithUser;
 import ch.fhnw.deardevbackend.mapper.TeamWithMembersMapper;
 import ch.fhnw.deardevbackend.repositories.TeamMemberWithUserRepository;
 import ch.fhnw.deardevbackend.repositories.TeamRepository;
+import ch.fhnw.deardevbackend.util.SecurityUtil;
 import lombok.RequiredArgsConstructor;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
@@ -27,8 +27,9 @@ public class TeamMemberService {
     public TeamWithMembersDTO getTeamMembersByTeamId(Integer teamId) {
         List<TeamMemberWithUser> members = teamMemberWithUserRepository.findByTeamId(teamId);
         Team team = teamRepository.findById(teamId).orElseThrow(() -> new RuntimeException("Team not found with id: " + teamId));
-        Integer adminId = members.stream().filter(member -> member.getRole().equals(Role.ADMIN)).toList().getFirst().getUser().getId();
-        boolean isActive = adminId.equals(team.getCreatedBy());
-        return teamWithMembersMapper.toDTO(team, members, isActive);
+
+        boolean isAdmin = team.getCreatedBy().equals(SecurityUtil.getCurrentUserId());
+
+        return teamWithMembersMapper.toDTO(team, members, isAdmin);
     }
 }

src/main/java/ch/fhnw/deardevbackend/util/SecurityUtil.java

@@ -0,0 +1,16 @@
+package ch.fhnw.deardevbackend.util;
+
+import ch.fhnw.deardevbackend.entities.User;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.context.SecurityContextHolder;
+
+public class SecurityUtil {
+
+    public static Integer getCurrentUserId() {
+        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
+        if (authentication != null && authentication.getPrincipal() instanceof User) {
+            return ((User) authentication.getPrincipal()).getId();
+        }
+        return null;
+    }
+}