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

@@ -55,4 +55,19 @@ public class TaskgroupController {
             return ResponseEntity.status(409).body(new SimpleStatusResponse("failed"));
         }
     }
+
+    @DeleteMapping("/taskgroups/{taskgroupID}")
+    public ResponseEntity<?> deleteTaskgroup(@PathVariable long taskgroupID) {
+        PermissionResult<Taskgroup> taskgroupPermissionResult = taskgroupService.getTaskgroupByIDAndUsername(taskgroupID, SecurityContextHolder.getContext().getAuthentication().getName());
+        if (!taskgroupPermissionResult.isHasPermissions()) {
+            return ResponseEntity.status(403).body(new SimpleStatusResponse("failed"));
+        }
+
+        if(taskgroupPermissionResult.getExitCode() == ServiceExitCode.MISSING_ENTITY) {
+            return ResponseEntity.status(404).body(new SimpleStatusResponse("failed"));
+        }
+
+        taskgroupService.deleteTaskgroup(taskgroupPermissionResult.getResult());
+        return ResponseEntity.ok(new SimpleStatusResponse("success"));
+    }
 }

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

@@ -62,4 +62,8 @@ public class TaskgroupService {
             return ServiceExitCode.OK;
         }
     }
+
+    public void deleteTaskgroup(Taskgroup taskgroup) {
+        taskgroupRepository.delete(taskgroup);
+    }
 }