diff options
Diffstat (limited to 'src/mailman/workflows/common.py')
| -rw-r--r-- | src/mailman/workflows/common.py | 192 |
1 files changed, 191 insertions, 1 deletions
diff --git a/src/mailman/workflows/common.py b/src/mailman/workflows/common.py index c57ce374d..79d57d0ae 100644 --- a/src/mailman/workflows/common.py +++ b/src/mailman/workflows/common.py @@ -18,23 +18,37 @@ """Common support between subscription and unsubscription.""" import uuid +import logging from datetime import timedelta +from email.utils import formataddr from enum import Enum +from mailman.core.i18n import _ +from mailman.email.message import UserNotification from mailman.interfaces.address import IAddress +from mailman.interfaces.bans import IBanManager +from mailman.interfaces.member import (AlreadySubscribedError, MemberRole, + MembershipIsBannedError) from mailman.interfaces.pending import IPendable, IPendings -from mailman.interfaces.subscriptions import TokenOwner +from mailman.interfaces.subscriptions import ( + SubscriptionConfirmationNeededEvent, SubscriptionPendingError, TokenOwner) +from mailman.interfaces.template import ITemplateLoader from mailman.interfaces.user import IUser from mailman.interfaces.usermanager import IUserManager from mailman.interfaces.workflows import (ISubscriptionWorkflow, IUnsubscriptionWorkflow, IWorkflow) from mailman.utilities.datetime import now +from mailman.utilities.string import expand, wrap from mailman.workflows.base import Workflow from zope.component import getUtility +from zope.event import notify from zope.interface import implementer from zope.interface.exceptions import DoesNotImplement +log = logging.getLogger('mailman.subscribe') + + class WhichSubscriber(Enum): address = 1 user = 2 @@ -141,3 +155,179 @@ class SubscriptionWorkflowCommon(Workflow): token_owner=token_owner.name, ) self.token = pendings.add(pendable, timedelta(days=3650)) + + +class SubscriptionBase(SubscriptionWorkflowCommon): + + def _step_sanity_checks(self): + # Ensure that we have both an address and a user, even if the address + # is not verified. We can't set the preferred address until it is + # verified. + if self.user is None: + # The address has no linked user so create one, link it, and set + # the user's preferred address. + assert self.address is not None, 'No address or user' + self.user = getUtility(IUserManager).make_user(self.address.email) + if self.address is None: + assert self.user.preferred_address is None, ( + "Preferred address exists, but wasn't used in constructor") + addresses = list(self.user.addresses) + if len(addresses) == 0: + raise AssertionError('User has no addresses: {}'.format( + self.user)) + # This is rather arbitrary, but we have no choice. + self.address = addresses[0] + assert self.user is not None and self.address is not None, ( + 'Insane sanity check results') + # Is this subscriber already a member? + if (self.which is WhichSubscriber.user and + self.user.preferred_address is not None): + subscriber = self.user + else: + subscriber = self.address + if self.mlist.is_subscribed(subscriber): + # 2017-04-22 BAW: This branch actually *does* get covered, as I've + # verified by a full coverage run, but diffcov for some reason + # claims that the test added in the branch that added this code + # does not cover the change. That seems like a bug in diffcov. + raise AlreadySubscribedError( # pragma: no cover + self.mlist.fqdn_listname, + self.address.email, + MemberRole.member) + # Is this email address banned? + if IBanManager(self.mlist).is_banned(self.address.email): + raise MembershipIsBannedError(self.mlist, self.address.email) + # Check if there is already a subscription request for this email. + pendings = getUtility(IPendings).find( + mlist=self.mlist, + pend_type='subscription') + for token, pendable in pendings: + if pendable['email'] == self.address.email: + raise SubscriptionPendingError(self.mlist, self.address.email) + # Start out with the subscriber being the token owner. + + def _step_do_subscription(self): + # We can immediately subscribe the user to the mailing list. + self.member = self.mlist.subscribe(self.subscriber) + assert self.token is None and self.token_owner is TokenOwner.no_one, ( + 'Unexpected active token at end of subscription workflow') + + +class RequestMixin: + + def _step_send_confirmation(self): + self._set_token(TokenOwner.subscriber) + self.push('do_confirm_verify') + self.save() + # Triggering this event causes the confirmation message to be sent. + notify(SubscriptionConfirmationNeededEvent( + self.mlist, self.token, self.address.email)) + # Now we wait for the confirmation. + raise StopIteration + + def _step_do_confirm_verify(self): + # Restore a little extra state that can't be stored in the database + # (because the order of setattr() on restore is indeterminate), then + # continue with the confirmation/verification step. + if self.which is WhichSubscriber.address: + self.subscriber = self.address + else: + assert self.which is WhichSubscriber.user + self.subscriber = self.user + # Reset the token so it can't be used in a replay attack. + self._set_token(TokenOwner.no_one) + # The user has confirmed their subscription request, and also verified + # their email address if necessary. This latter needs to be set on the + # IAddress, but there's nothing more to do about the confirmation step. + # We just continue along with the workflow. + if self.address.verified_on is None: + self.address.verified_on = now() + self.verified = True + self.confirmed = True + + +class VerificationMixin(RequestMixin): + + def __init__(self, pre_verified=False): + self.verified = pre_verified + + def _step_verification_checks(self): + # Is the address already verified, or is the pre-verified flag set? + if self.address.verified_on is None: + if self.verified: + self.address.verified_on = now() + else: + # The address being subscribed is not yet verified, so we need + # to send a validation email that will also confirm that the + # user wants to be subscribed to this mailing list. + self.push('send_confirmation') + return + + +class ConfirmationMixin(RequestMixin): + + def __init__(self, pre_confirmed=False): + self.confirmed = pre_confirmed + + def _step_confirmation_checks(self): + # If the subscription has been pre-confirmed, then we can skip the + # confirmation check can be skipped. + if self.confirmed: + return + # The user must confirm their subscription. + self.push('send_confirmation') + + +class ModerationMixin: + + def __init__(self, pre_approved=False): + self.approved = pre_approved + + def _step_moderation_checks(self): + # Does the moderator need to approve the subscription request? + if self.approved: + return + # A moderator must confirm the subscription. + self.push('get_moderator_approval') + + def _step_get_moderator_approval(self): + # Here's the next step in the workflow, assuming the moderator + # approves of the subscription. If they don't, the workflow and + # subscription request will just be thrown away. + self._set_token(TokenOwner.moderator) + self.push('subscribe_from_restored') + self.save() + log.info('{}: held subscription request from {}'.format( + self.mlist.fqdn_listname, self.address.email)) + # Possibly send a notification to the list moderators. + if self.mlist.admin_immed_notify: + subject = _( + 'New subscription request to $self.mlist.display_name ' + 'from $self.address.email') + username = formataddr( + (self.subscriber.display_name, self.address.email)) + template = getUtility(ITemplateLoader).get( + 'list:admin:action:subscribe', self.mlist) + text = wrap(expand(template, self.mlist, dict( + member=username, + ))) + # This message should appear to come from the <list>-owner so as + # to avoid any useless bounce processing. + msg = UserNotification( + self.mlist.owner_address, self.mlist.owner_address, + subject, text, self.mlist.preferred_language) + msg.send(self.mlist) + # The workflow must stop running here. + raise StopIteration + + def _step_subscribe_from_restored(self): + # Prevent replay attacks. + self._set_token(TokenOwner.no_one) + # Restore a little extra state that can't be stored in the database + # (because the order of setattr() on restore is indeterminate), then + # subscribe the user. + if self.which is WhichSubscriber.address: + self.subscriber = self.address + else: + assert self.which is WhichSubscriber.user + self.subscriber = self.user |