## Copyright (C) 2011 Uli Fouquet & Henrik Bettermann
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 2 of the License, or
## (at your option) any later version.
##
## This program 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 General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program; if not, write to the Free Software
## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
##
"""
Container which holds the data of the student study courses
and contains the (student) study level objects.
"""
import grok
from grok import index
from zope.component.interfaces import IFactory
from waeup.sirp.students.interfaces import (
    IStudentStudyCourse, IStudentNavigation, IStudentStudyLevel)
from waeup.sirp.utils.helpers import attrs_to_fields

class StudentStudyCourse(grok.Container):
    """This is a container for study levels.
    """
    grok.implements(IStudentStudyCourse, IStudentNavigation)
    grok.provides(IStudentStudyCourse)

    def __init__(self):
        super(StudentStudyCourse, self).__init__()
        return

    def getStudent(self):
        return self.__parent__

    def addStudentStudyLevel(self, studylevel):
        """Add a study level object.
        """
        if not IStudentStudyLevel.providedBy(studylevel):
            raise TypeError(
                'StudentStudyCourses contain only IStudentStudyLevel instances')
        self[studylevel.level] = studylevel
        return

StudentStudyCourse = attrs_to_fields(StudentStudyCourse)