backend/src/main/java/core/api/controller/TaskgroupController.java

@@ -14,6 +14,7 @@ import org.springframework.security.core.context.SecurityContextHolder;
 import org.springframework.web.bind.annotation.*;
 
 import javax.validation.Valid;
+import java.util.List;
 
 @CrossOrigin(origins = "*", maxAge = 3600)
 @RestController
@@ -70,4 +71,11 @@ public class TaskgroupController {
         taskgroupService.deleteTaskgroup(taskgroupPermissionResult.getResult());
         return ResponseEntity.ok(new SimpleStatusResponse("success"));
     }
+
+    @GetMapping("/taskgroups")
+    public ResponseEntity<List<TaskgroupEntityInfo>> listTaskgroupsOfUser() {
+        List<Taskgroup> taskgroups = taskgroupService.getTaskgroupsByUser(SecurityContextHolder.getContext().getAuthentication().getName());
+        List<TaskgroupEntityInfo> taskgroupEntityInfos = taskgroups.stream().map(TaskgroupEntityInfo::new).toList();
+        return ResponseEntity.ok(taskgroupEntityInfos);
+    }
 }

backend/src/main/java/core/repositories/timemanager/TaskgroupRepository.java

@@ -2,11 +2,17 @@ package core.repositories.timemanager;
 
 import core.entities.User;
 import core.entities.timemanager.Taskgroup;
+import org.springframework.data.jpa.repository.Query;
 import org.springframework.data.repository.CrudRepository;
 import org.springframework.stereotype.Repository;
 
+import java.util.List;
+
 @Repository
 public interface TaskgroupRepository extends CrudRepository<Taskgroup, Long> {
 
     boolean existsByTaskgroupNameAndUser(String name, User user);
+
+    @Query("SELECT tg FROM Taskgroup tg WHERE tg.user.username = ?1")
+    List<Taskgroup> findAllByUser(String username);
 }

backend/src/main/java/core/services/TaskgroupService.java

@@ -12,6 +12,7 @@ import org.springframework.scheduling.config.Task;
 import org.springframework.security.core.parameters.P;
 import org.springframework.stereotype.Service;
 
+import java.util.List;
 import java.util.NoSuchElementException;
 import java.util.Optional;
 
@@ -66,4 +67,8 @@ public class TaskgroupService {
     public void deleteTaskgroup(Taskgroup taskgroup) {
         taskgroupRepository.delete(taskgroup);
     }
+
+    public List<Taskgroup> getTaskgroupsByUser(String username) {
+        return taskgroupRepository.findAllByUser(username);
+    }
 }