from __future__ import absolute_import
from django import forms
from django.conf import settings
from django.contrib.auth.forms import SetPasswordForm, AuthenticationForm, \
PasswordResetForm
from django.core.exceptions import ValidationError
from django.core.urlresolvers import reverse
from django.core.validators import validate_email
from django.db.models.query import QuerySet
from django.utils.translation import ugettext as _
from jinja2 import Markup as mark_safe
from zerver.lib.actions import do_change_password, is_inactive, user_email_is_unique
from zerver.lib.name_restrictions import is_reserved_subdomain, is_disposable_domain
from zerver.lib.request import JsonableError
from zerver.lib.users import check_full_name
from zerver.lib.utils import get_subdomain, check_subdomain
from zerver.models import Realm, get_user_profile_by_email, UserProfile, \
get_realm_by_email_domain, get_realm, \
get_unique_open_realm, email_to_domain, email_allowed_for_realm
from zproject.backends import password_auth_enabled
import logging
import re
import DNS
from typing import Any, Callable, List, Optional, Text
MIT_VALIDATION_ERROR = u'That user does not exist at MIT or is a ' + \
u'mailing list. ' + \
u'If you want to sign up an alias for Zulip, ' + \
u'contact us.'
WRONG_SUBDOMAIN_ERROR = "Your Zulip account is not a member of the " + \
"organization associated with this subdomain. " + \
"Please contact %s with any questions!" % (settings.ZULIP_ADMINISTRATOR,)
def get_registration_string(domain):
# type: (Text) -> Text
register_url = reverse('register') + domain
register_account_string = _('The organization with the domain already exists. '
'Please register your account here.') % {'url': register_url}
return register_account_string
def email_is_not_mit_mailing_list(email):
# type: (Text) -> None
"""Prevent MIT mailing lists from signing up for Zulip"""
if "@mit.edu" in email:
username = email.rsplit("@", 1)[0]
# Check whether the user exists and can get mail.
try:
DNS.dnslookup("%s.pobox.ns.athena.mit.edu" % username, DNS.Type.TXT)
except DNS.Base.ServerError as e:
if e.rcode == DNS.Status.NXDOMAIN:
raise ValidationError(mark_safe(MIT_VALIDATION_ERROR))
else:
raise
class RegistrationForm(forms.Form):
full_name = forms.CharField(max_length=100)
# The required-ness of the password field gets overridden if it isn't
# actually required for a realm
password = forms.CharField(widget=forms.PasswordInput, max_length=100,
required=False)
realm_name = forms.CharField(max_length=100, required=False)
realm_subdomain = forms.CharField(max_length=40, required=False)
realm_org_type = forms.ChoiceField(((Realm.COMMUNITY, 'Community'),
(Realm.CORPORATE, 'Corporate')),
initial=Realm.COMMUNITY, required=False)
if settings.TERMS_OF_SERVICE:
terms = forms.BooleanField(required=True)
def clean_full_name(self):
# type: () -> Text
try:
return check_full_name(self.cleaned_data['full_name'])
except JsonableError as e:
raise ValidationError(e.error)
def clean_realm_subdomain(self):
# type: () -> str
if settings.REALMS_HAVE_SUBDOMAINS:
error_strings = {
'too short': _("Subdomain needs to have length 3 or greater."),
'extremal dash': _("Subdomain cannot start or end with a '-'."),
'bad character': _("Subdomain can only have lowercase letters, numbers, and '-'s."),
'unavailable': _("Subdomain unavailable. Please choose a different one.")}
else:
error_strings = {
'too short': _("Short name needs at least 3 characters."),
'extremal dash': _("Short name cannot start or end with a '-'."),
'bad character': _("Short name can only have lowercase letters, numbers, and '-'s."),
'unavailable': _("Short name unavailable. Please choose a different one.")}
subdomain = self.cleaned_data['realm_subdomain']
if not subdomain:
return ''
if len(subdomain) < 3:
raise ValidationError(error_strings['too short'])
if subdomain[0] == '-' or subdomain[-1] == '-':
raise ValidationError(error_strings['extremal dash'])
if not re.match('^[a-z0-9-]*$', subdomain):
raise ValidationError(error_strings['bad character'])
if is_reserved_subdomain(subdomain) or \
get_realm(subdomain) is not None:
raise ValidationError(error_strings['unavailable'])
return subdomain
class ToSForm(forms.Form):
terms = forms.BooleanField(required=True)
class HomepageForm(forms.Form):
email = forms.EmailField(validators=[is_inactive])
def __init__(self, *args, **kwargs):
# type: (*Any, **Any) -> None
self.realm = kwargs.pop('realm', None)
super(HomepageForm, self).__init__(*args, **kwargs)
def clean_email(self):
# type: () -> str
"""Returns the email if and only if the user's email address is
allowed to join the realm they are trying to join."""
email = self.cleaned_data['email']
if get_unique_open_realm():
return email
# Otherwise, the user is trying to join a specific realm.
realm = self.realm
if realm is None and not settings.REALMS_HAVE_SUBDOMAINS:
realm = get_realm_by_email_domain(email)
if realm is None:
if settings.REALMS_HAVE_SUBDOMAINS:
raise ValidationError(_("The organization you are trying to join does not exist."))
else:
raise ValidationError(_("Your email address does not correspond to any existing organization."))
if realm.invite_required:
raise ValidationError(_("Please request an invite from the organization administrator."))
if not email_allowed_for_realm(email, realm):
raise ValidationError(
_("The organization you are trying to join, %(string_id)s, only allows users with e-mail "
"addresses within the organization. Please try a different e-mail address."
% {'string_id': realm.string_id}))
if realm.is_zephyr_mirror_realm:
email_is_not_mit_mailing_list(email)
return email
def email_is_not_disposable(email):
# type: (Text) -> None
if is_disposable_domain(email_to_domain(email)):
raise ValidationError(_("Please use your real email address."))
class RealmCreationForm(forms.Form):
# This form determines whether users can create a new realm.
email = forms.EmailField(validators=[user_email_is_unique, email_is_not_disposable])
class LoggingSetPasswordForm(SetPasswordForm):
def save(self, commit=True):
# type: (bool) -> UserProfile
do_change_password(self.user, self.cleaned_data['new_password1'],
log=True, commit=commit)
return self.user
class ZulipPasswordResetForm(PasswordResetForm):
def get_users(self, email):
# type: (str) -> QuerySet
"""Given an email, return matching user(s) who should receive a reset.
This is modified from the original in that it allows non-bot
users who don't have a usable password to reset their
passwords.
"""
if not password_auth_enabled:
logging.info("Password reset attempted for %s even though password auth is disabled." % (email,))
return []
result = UserProfile.objects.filter(email__iexact=email, is_active=True,
is_bot=False)
if len(result) == 0:
logging.info("Password reset attempted for %s; no active account." % (email,))
return result
class CreateUserForm(forms.Form):
full_name = forms.CharField(max_length=100)
email = forms.EmailField()
class OurAuthenticationForm(AuthenticationForm):
def clean_username(self):
# type: () -> str
email = self.cleaned_data['username']
try:
user_profile = get_user_profile_by_email(email)
except UserProfile.DoesNotExist:
return email
if user_profile.realm.deactivated:
error_msg = u"""Sorry for the trouble, but %s has been deactivated.
Please contact %s to reactivate this group.""" % (
user_profile.realm.name,
settings.ZULIP_ADMINISTRATOR)
raise ValidationError(mark_safe(error_msg))
if not check_subdomain(get_subdomain(self.request), user_profile.realm.subdomain):
logging.warning("User %s attempted to password login to wrong subdomain %s" %
(user_profile.email, get_subdomain(self.request)))
raise ValidationError(mark_safe(WRONG_SUBDOMAIN_ERROR))
return email
class MultiEmailField(forms.Field):
def to_python(self, emails):
# type: (Text) -> List[Text]
"""Normalize data to a list of strings."""
if not emails:
return []
return [email.strip() for email in emails.split(',')]
def validate(self, emails):
# type: (List[Text]) -> None
"""Check if value consists only of valid emails."""
super(MultiEmailField, self).validate(emails)
for email in emails:
validate_email(email)
class FindMyTeamForm(forms.Form):
emails = MultiEmailField(
help_text="Add up to 10 comma-separated email addresses.")
def clean_emails(self):
# type: () -> List[Text]
emails = self.cleaned_data['emails']
if len(emails) > 10:
raise forms.ValidationError("Please enter at most 10 emails.")
return emails