## $Id: department.py 7195 2011-11-25 07:34:07Z henrik $
##
## 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
##
"""University departments.
"""
import grok
from zope.component import createObject
from zope.component.interfaces import IFactory
from zope.interface import implementedBy
from waeup.sirp.university.interfaces import IDepartment, IDepartmentAdd
from waeup.sirp.university.vocabularies import inst_types

class Department(grok.Container):
    """A university department.
    """
    grok.implements(IDepartment, IDepartmentAdd)

    @property       # Make this method read_only and looking like an attr.
    def local_roles(cls):
        return ['waeup.local.DepartmentManager',
                'waeup.local.ClearanceOfficer',]

    # A simple counter for ids.
    next_id = 0L

    def __init__(self,
                 title=u'Unnamed Department',
                 title_prefix=u'department',
                 code=u"NA", **kw):
        super(Department, self).__init__(**kw)
        self.title = title
        self.title_prefix = title_prefix
        self.code = code
        self.courses = createObject(u'waeup.CourseContainer')
        self.courses.__parent__ = self
        self.courses.__name__ = 'courses'
        self.certificates = createObject(u'waeup.CertificateContainer')
        self.certificates.__parent__ = self
        self.certificates.__name__ = 'certificates'

    def traverse(self, name):
        """Deliver appropriate containers, if someone wants to go to courses
        or departments.
        """
        if name == 'courses':
            return self.courses
        elif name == 'certificates':
            return self.certificates
        return None

    def longtitle(self):
        return "%s %s (%s)" % (
            inst_types.getTerm(self.title_prefix).title,
            self.title, self.code)


class DepartmentFactory(grok.GlobalUtility):
    """A factory for department containers.
    """
    grok.implements(IFactory)
    grok.name(u'waeup.Department')
    title = u"Create a new department.",
    description = u"This factory instantiates new department instances."

    def __call__(self, *args, **kw):
        return Department(*args, **kw)

    def getInterfaces(self):
        """Get interfaces of objects provided by this factory.
        """
        return implementedBy(Department)