kpsul/gestioncof/shared.py

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from django.contrib.sites.models import Site
from django.conf import settings
from django_cas_ng.backends import CASBackend
from django_cas_ng.utils import get_cas_client
from django.contrib.auth import get_user_model
from django.contrib.auth.models import User as DjangoUser
from django.db import models, connection
from django.core.mail import send_mail
from django.template import Template, Context
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from gestioncof.models import CofProfile, CustomMail
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User = get_user_model()
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class COFCASBackend(CASBackend):
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def authenticate_cas(self, ticket, service, request):
"""Verifies CAS ticket and gets or creates User object"""
client = get_cas_client(service_url=service)
username, attributes, _= client.verify_ticket(ticket)
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if attributes:
request.session['attributes'] = attributes
if not username:
return None
profiles = CofProfile.objects.filter(login_clipper = username)
if len(profiles) > 0:
profile = profiles.order_by('-is_cof')[0]
user = profile.user
return user
try:
user = User.objects.get(username=username)
except User.DoesNotExist:
# user will have an "unusable" password
user = User.objects.create_user(username, '')
user.save()
return user
def authenticate(self, ticket, service, request):
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"""Authenticates CAS ticket and retrieves user data"""
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user = self.authenticate_cas(ticket, service, request)
if user is None:
return user
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try:
profile = user.profile
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except CofProfile.DoesNotExist:
profile, created = CofProfile.objects.get_or_create(user = user)
profile.save()
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if not profile.login_clipper:
profile.login_clipper = user.username
profile.save()
if not user.email:
user.email = settings.CAS_EMAIL_FORMAT % profile.login_clipper
user.save()
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if profile.is_buro and not user.is_superuser:
user.is_superuser = True
user.is_staff = True
user.save()
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return user
def context_processor (request):
'''Append extra data to the context of the given request'''
data = {
"user": request.user,
"site": Site.objects.get_current(),
}
return data
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def lock_table(*models):
query = "LOCK TABLES "
for i, model in enumerate(models):
table = model._meta.db_table
if i > 0: query += ", "
query += "%s WRITE" % table
cursor = connection.cursor()
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cursor.execute(query)
row = cursor.fetchone()
return row
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def unlock_tables(*models):
cursor = connection.cursor()
cursor.execute("UNLOCK TABLES")
row = cursor.fetchone()
return row
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unlock_table = unlock_tables
def send_custom_mail(to, shortname, context = None, from_email = "cof@ens.fr"):
if context is None: context = {}
if isinstance(to, DjangoUser):
context["nom"] = to.get_full_name()
context["prenom"] = to.first_name
to = to.email
mail = CustomMail.objects.get(shortname = shortname)
template = Template(mail.content)
message = template.render(Context(context))
send_mail (mail.title, message,
from_email, [to],
fail_silently = True)