## $Id: container.py 13319 2015-10-14 17:07:35Z 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
##
"""
Containers which contain hostels.
"""
import grok
import pytz
from datetime import datetime
from zope.catalog.interfaces import ICatalog
from zope.component import queryUtility
from waeup.kofa.hostels.interfaces import IHostelsContainer, IHostel
from waeup.kofa.utils.logger import Logger
from waeup.kofa.utils.helpers import attrs_to_fields

class HostelsContainer(grok.Container, Logger):
    """This is a container for all kind of hostels.
    """
    grok.implements(IHostelsContainer)
    grok.provides(IHostelsContainer)

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

    def addHostel(self, hostel):
        """Add a hostel.
        """
        if not IHostel.providedBy(hostel):
            raise TypeError(
                'HostelsContainers contain only IHostel instances')
        self[hostel.hostel_id] = hostel
        return

    def clearAllHostels(self):
        """Clear all hostels.
        """
        for hostel in self.values():
            hostel.clearHostel()
        return

    def releaseExpiredAllocations(self, n=7):
        """Release bed if bed allocation has expired. Allocation expires
        after `n` days if maintenance fee has not been paid.
        """
        cat = queryUtility(ICatalog, name='beds_catalog')
        results = cat.searchResults(owner=(None, None))
        released = []
        for bed in results:
            student_id = bed.releaseBedIfMaintenanceNotPaid(n=n)
            if student_id:
                released.append('%s (%s)' % (bed.bed_id,student_id))
        return released

    @property
    def expired(self):
        # Check if application has started ...
        if not self.startdate or (
            self.startdate > datetime.now(pytz.utc)):
            return True
        # ... or ended
        if not self.enddate or (
            self.enddate < datetime.now(pytz.utc)):
            return True
        return False

    logger_name = 'waeup.kofa.${sitename}.hostels'
    logger_filename = 'hostels.log'

    def writeLogMessage(self, view, message):
        ob_class = view.__implemented__.__name__.replace('waeup.kofa.','')
        self.logger.info(
            '%s - %s - %s' % (ob_class, self.__name__, message))
        return

HostelsContainer = attrs_to_fields(HostelsContainer)