# -*- coding: utf-8 -*-

# Copyright (C) 2007 Samuel Abels
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301  USA
from .base import TaskSpec
from .Trigger import Trigger


class CancelTask(Trigger):

    """
    This class implements a trigger that cancels another task (branch).
    If more than one input is connected, the task performs an implicit
    multi merge.
    If more than one output is connected, the task performs an implicit
    parallel split.
    """

    def _on_complete_hook(self, my_task):
        for task_name in self.context:
            cancel_tasks = my_task.workflow.get_task_spec_from_name(task_name)
            for cancel_task in my_task._get_root()._find_any(cancel_tasks):
                cancel_task.cancel()
        TaskSpec._on_complete_hook(self, my_task)

    def serialize(self, serializer):
        return serializer.serialize_cancel_task(self)

    @classmethod
    def deserialize(self, serializer, wf_spec, s_state):
        return serializer.deserialize_cancel_task(wf_spec, s_state)