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# Copyright (C) 2017 Alban Gruin
#
# celcatsanitizer is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# celcatsanitizer 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with celcatsanitizer. If not, see <http://www.gnu.org/licenses/>.
import datetime
from django.core.management.base import BaseCommand
from django.db import transaction
from django.db.models import Min
from django.utils import timezone
from edt.models import Course, Timetable
from edt.utils import get_week
from ._private import delete_courses_in_week, get_events, get_update_date, get_weeks, get_xml
@transaction.atomic
def process_timetable_week(timetable, soup, weeks_in_soup, force, year=None, week=None):
criteria = {}
if year is not None and week is not None:
begin, end = get_week(year, week)
criteria["begin__gte"] = begin
criteria["begin__lt"] = end
last_update_date = Course.objects.filter(timetable=timetable, **criteria) \
.aggregate(Min("last_update")) \
["last_update__min"]
new_update_date = get_update_date(soup)
if not force and last_update_date is not None and new_update_date is not None and \
last_update_date >= new_update_date:
return
if year is not None and week is not None:
delete_courses_in_week(timetable, year, week)
else:
Course.objects.filter(timetable=timetable,
begin__gte=min(weeks_in_soup.values())).delete()
for course in get_events(timetable, soup, weeks_in_soup, year, week):
course.save()
def process_timetable(timetable, force, year=None, weeks=None):
soup = get_xml(timetable.url)
weeks_in_soup = get_weeks(soup)
if year is not None and weeks is not None:
for week in weeks:
process_timetable_week(timetable, soup, weeks_in_soup, force, year, week)
else:
process_timetable_week(timetable, soup, weeks_in_soup, force)
class Command(BaseCommand):
help = "Fetches registered celcat timetables"
def add_arguments(self, parser):
parser.add_argument("--all", const=True, default=False, action="store_const")
parser.add_argument("--force", const=True, default=False, action="store_const")
parser.add_argument("--week", type=int, choices=range(1, 54), nargs="+")
parser.add_argument("--year", type=int, nargs=1)
def handle(self, *args, **options):
year = None
errcount = 0
if options["all"]:
weeks = None
elif options["week"] is None:
_, week, day = timezone.now().isocalendar()
if day >= 6:
year, week, _ = (timezone.now() + datetime.timedelta(weeks=1)).isocalendar()
weeks = [week]
else:
weeks = options["week"]
if not options["all"]:
if options["year"] is None and year is None:
year = timezone.now().year
elif year is None:
year = options["year"][0]
for timetable in Timetable.objects.all():
self.stdout.write("Processing {0}".format(timetable))
try:
process_timetable(timetable, options["force"], year, weeks)
except Exception as exc:
self.stderr.write(
self.style.ERROR("Failed to process {0}: {1}".format(timetable, exc)))
errcount += 1
if errcount == 0:
self.stdout.write(self.style.SUCCESS("Done."))
else:
self.stdout.write(self.style.ERROR("Done with {0} errors.".format(errcount)))
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