def _is_task_undoable(logged_in_user_id: int, task: Task) -> bool:
""" Determines if the current task status can be undone by the logged in user """
# Test to see if user can undo status on this task
if logged_in_user_id and TaskStatus(task.task_status) not in [TaskStatus.LOCKED_FOR_MAPPING,
TaskStatus.LOCKED_FOR_VALIDATION,
TaskStatus.READY]:
last_action = TaskHistory.get_last_action(task.project_id, task.id)
# User requesting task made the last change, so they are allowed to undo it.
if last_action.user_id == int(logged_in_user_id):
return True
return False
def undo_mapping(project_id: int,
task_id: int,
user_id: int,
preferred_locale: str = 'en') -> TaskDTO:
""" Allows a user to Undo the task state they updated """
task = MappingService.get_task(task_id, project_id)
if not MappingService._is_task_undoable(user_id, task):
raise MappingServiceError('Undo not allowed for this user')
current_state = TaskStatus(task.task_status)
undo_state = TaskHistory.get_last_status(project_id, task_id, True)
# Refer to last action for user of it.
last_action = TaskHistory.get_last_action(project_id, task_id)
StatsService.update_stats_after_task_state_change(
project_id, last_action.user_id, current_state, undo_state, 'undo')
task.unlock_task(
user_id, undo_state,
f'Undo state from {current_state.name} to {undo_state.name}', True)
return task.as_dto_with_instructions(preferred_locale)
