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Diffstat (limited to 'src/leap/bitmask/mail/imap/account.py')
| -rw-r--r-- | src/leap/bitmask/mail/imap/account.py | 498 |
1 files changed, 498 insertions, 0 deletions
diff --git a/src/leap/bitmask/mail/imap/account.py b/src/leap/bitmask/mail/imap/account.py new file mode 100644 index 00000000..e795c1b9 --- /dev/null +++ b/src/leap/bitmask/mail/imap/account.py @@ -0,0 +1,498 @@ +# -*- coding: utf-8 -*- +# account.py +# Copyright (C) 2013-2015 LEAP +# +# 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 3 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, see <http://www.gnu.org/licenses/>. +""" +Soledad Backed IMAP Account. +""" +import logging +import os +import time +from functools import partial + +from twisted.internet import defer +from twisted.mail import imap4 +from twisted.python import log +from zope.interface import implements + +from leap.common.check import leap_assert, leap_assert_type + +from leap.mail.constants import MessageFlags +from leap.mail.mail import Account +from leap.mail.imap.mailbox import IMAPMailbox, normalize_mailbox +from leap.soledad.client import Soledad + +logger = logging.getLogger(__name__) + +PROFILE_CMD = os.environ.get('LEAP_PROFILE_IMAPCMD', False) + +if PROFILE_CMD: + def _debugProfiling(result, cmdname, start): + took = (time.time() - start) * 1000 + log.msg("CMD " + cmdname + " TOOK: " + str(took) + " msec") + return result + + +####################################### +# Soledad IMAP Account +####################################### + + +class IMAPAccount(object): + """ + An implementation of an imap4 Account + that is backed by Soledad Encrypted Documents. + """ + + implements(imap4.IAccount, imap4.INamespacePresenter) + + selected = None + + def __init__(self, store, user_id, d=defer.Deferred()): + """ + Keeps track of the mailboxes and subscriptions handled by this account. + + The account is not ready to be used, since the store needs to be + initialized and we also need to do some initialization routines. + You can either pass a deferred to this constructor, or use + `callWhenReady` method. + + :param store: a Soledad instance. + :type store: Soledad + + :param user_id: The identifier of the user this account belongs to + (user id, in the form user@provider). + :type user_id: str + + + :param d: a deferred that will be fired with this IMAPAccount instance + when the account is ready to be used. + :type d: defer.Deferred + """ + leap_assert(store, "Need a store instance to initialize") + leap_assert_type(store, Soledad) + + # TODO assert too that the name matches the user/uuid with which + # soledad has been initialized. Although afaik soledad doesn't know + # about user_id, only the client backend. + + self.user_id = user_id + self.account = Account( + store, user_id, ready_cb=lambda: d.callback(self)) + + def end_session(self): + """ + Used to mark when the session has closed, and we should not allow any + more commands from the client. + + Right now it's called from the client backend. + """ + # TODO move its use to the service shutdown in leap.mail + self.account.end_session() + + @property + def session_ended(self): + return self.account.session_ended + + def callWhenReady(self, cb, *args, **kw): + """ + Execute callback when the account is ready to be used. + XXX note that this callback will be called with a first ignored + parameter. + """ + # TODO ignore the first parameter and change tests accordingly. + d = self.account.callWhenReady(cb, *args, **kw) + return d + + def getMailbox(self, name): + """ + Return a Mailbox with that name, without selecting it. + + :param name: name of the mailbox + :type name: str + + :returns: an IMAPMailbox instance + :rtype: IMAPMailbox + """ + name = normalize_mailbox(name) + + def check_it_exists(mailboxes): + if name not in mailboxes: + raise imap4.MailboxException("No such mailbox: %r" % name) + return True + + d = self.account.list_all_mailbox_names() + d.addCallback(check_it_exists) + d.addCallback(lambda _: self.account.get_collection_by_mailbox(name)) + d.addCallback(self._return_mailbox_from_collection) + return d + + def _return_mailbox_from_collection(self, collection, readwrite=1): + if collection is None: + return None + mbox = IMAPMailbox(collection, rw=readwrite) + return mbox + + # + # IAccount + # + + def addMailbox(self, name, creation_ts=None): + """ + Add a mailbox to the account. + + :param name: the name of the mailbox + :type name: str + + :param creation_ts: an optional creation timestamp to be used as + mailbox id. A timestamp will be used if no + one is provided. + :type creation_ts: int + + :returns: a Deferred that will contain the document if successful. + :rtype: defer.Deferred + """ + name = normalize_mailbox(name) + + # FIXME --- return failure instead of AssertionError + # See AccountTestCase... + leap_assert(name, "Need a mailbox name to create a mailbox") + + def check_it_does_not_exist(mailboxes): + if name in mailboxes: + raise imap4.MailboxCollision, repr(name) + return mailboxes + + d = self.account.list_all_mailbox_names() + d.addCallback(check_it_does_not_exist) + d.addCallback(lambda _: self.account.add_mailbox( + name, creation_ts=creation_ts)) + d.addCallback(lambda _: self.account.get_collection_by_mailbox(name)) + d.addCallback(self._return_mailbox_from_collection) + return d + + def create(self, pathspec): + """ + Create a new mailbox from the given hierarchical name. + + :param pathspec: + The full hierarchical name of a new mailbox to create. + If any of the inferior hierarchical names to this one + do not exist, they are created as well. + :type pathspec: str + + :return: + A deferred that will fire with a true value if the creation + succeeds. The deferred might fail with a MailboxException + if the mailbox cannot be added. + :rtype: Deferred + + """ + def pass_on_collision(failure): + failure.trap(imap4.MailboxCollision) + return True + + def handle_collision(failure): + failure.trap(imap4.MailboxCollision) + if not pathspec.endswith('/'): + return defer.succeed(False) + else: + return defer.succeed(True) + + def all_good(result): + return all(result) + + paths = filter(None, normalize_mailbox(pathspec).split('/')) + subs = [] + sep = '/' + + for accum in range(1, len(paths)): + partial_path = sep.join(paths[:accum]) + d = self.addMailbox(partial_path) + d.addErrback(pass_on_collision) + subs.append(d) + + df = self.addMailbox(sep.join(paths)) + df.addErrback(handle_collision) + subs.append(df) + + d1 = defer.gatherResults(subs) + d1.addCallback(all_good) + return d1 + + def select(self, name, readwrite=1): + """ + Selects a mailbox. + + :param name: the mailbox to select + :type name: str + + :param readwrite: 1 for readwrite permissions. + :type readwrite: int + + :rtype: IMAPMailbox + """ + name = normalize_mailbox(name) + + def check_it_exists(mailboxes): + if name not in mailboxes: + logger.warning("SELECT: No such mailbox!") + return None + return name + + def set_selected(_): + self.selected = name + + def get_collection(name): + if name is None: + return None + return self.account.get_collection_by_mailbox(name) + + d = self.account.list_all_mailbox_names() + d.addCallback(check_it_exists) + d.addCallback(get_collection) + d.addCallback(partial( + self._return_mailbox_from_collection, readwrite=readwrite)) + return d + + def delete(self, name, force=False): + """ + Deletes a mailbox. + + :param name: the mailbox to be deleted + :type name: str + + :param force: + if True, it will not check for noselect flag or inferior + names. use with care. + :type force: bool + :rtype: Deferred + """ + name = normalize_mailbox(name) + _mboxes = None + + def check_it_exists(mailboxes): + global _mboxes + _mboxes = mailboxes + if name not in mailboxes: + raise imap4.MailboxException("No such mailbox: %r" % name) + + def get_mailbox(_): + return self.getMailbox(name) + + def destroy_mailbox(mbox): + return mbox.destroy() + + def check_can_be_deleted(mbox): + global _mboxes + # See if this box is flagged \Noselect + mbox_flags = mbox.getFlags() + if MessageFlags.NOSELECT_FLAG in mbox_flags: + # Check for hierarchically inferior mailboxes with this one + # as part of their root. + for others in _mboxes: + if others != name and others.startswith(name): + raise imap4.MailboxException( + "Hierarchically inferior mailboxes " + "exist and \\Noselect is set") + return mbox + + d = self.account.list_all_mailbox_names() + d.addCallback(check_it_exists) + d.addCallback(get_mailbox) + if not force: + d.addCallback(check_can_be_deleted) + d.addCallback(destroy_mailbox) + return d + + # FIXME --- not honoring the inferior names... + # if there are no hierarchically inferior names, we will + # delete it from our ken. + # XXX is this right? + # if self._inferiorNames(name) > 1: + # self._index.removeMailbox(name) + + def rename(self, oldname, newname): + """ + Renames a mailbox. + + :param oldname: old name of the mailbox + :type oldname: str + + :param newname: new name of the mailbox + :type newname: str + """ + oldname = normalize_mailbox(oldname) + newname = normalize_mailbox(newname) + + def rename_inferiors((inferiors, mailboxes)): + rename_deferreds = [] + inferiors = [ + (o, o.replace(oldname, newname, 1)) for o in inferiors] + + for (old, new) in inferiors: + if new in mailboxes: + raise imap4.MailboxCollision(repr(new)) + + for (old, new) in inferiors: + d = self.account.rename_mailbox(old, new) + rename_deferreds.append(d) + + d1 = defer.gatherResults(rename_deferreds, consumeErrors=True) + return d1 + + d1 = self._inferiorNames(oldname) + d2 = self.account.list_all_mailbox_names() + + d = defer.gatherResults([d1, d2]) + d.addCallback(rename_inferiors) + return d + + def _inferiorNames(self, name): + """ + Return hierarchically inferior mailboxes. + + :param name: name of the mailbox + :rtype: list + """ + # XXX use wildcard query instead + def filter_inferiors(mailboxes): + inferiors = [] + for infname in mailboxes: + if infname.startswith(name): + inferiors.append(infname) + return inferiors + + d = self.account.list_all_mailbox_names() + d.addCallback(filter_inferiors) + return d + + def listMailboxes(self, ref, wildcard): + """ + List the mailboxes. + + from rfc 3501: + returns a subset of names from the complete set + of all names available to the client. Zero or more untagged LIST + replies are returned, containing the name attributes, hierarchy + delimiter, and name. + + :param ref: reference name + :type ref: str + + :param wildcard: mailbox name with possible wildcards + :type wildcard: str + """ + wildcard = imap4.wildcardToRegexp(wildcard, '/') + + def get_list(mboxes, mboxes_names): + return zip(mboxes_names, mboxes) + + def filter_inferiors(ref): + mboxes = [mbox for mbox in ref if wildcard.match(mbox)] + mbox_d = defer.gatherResults([self.getMailbox(m) for m in mboxes]) + + mbox_d.addCallback(get_list, mboxes) + return mbox_d + + d = self._inferiorNames(normalize_mailbox(ref)) + d.addCallback(filter_inferiors) + return d + + # + # The rest of the methods are specific for leap.mail.imap.account.Account + # + + def isSubscribed(self, name): + """ + Returns True if user is subscribed to this mailbox. + + :param name: the mailbox to be checked. + :type name: str + + :rtype: Deferred (will fire with bool) + """ + name = normalize_mailbox(name) + + def get_subscribed(mbox): + return mbox.collection.get_mbox_attr("subscribed") + + d = self.getMailbox(name) + d.addCallback(get_subscribed) + return d + + def subscribe(self, name): + """ + Subscribe to this mailbox if not already subscribed. + + :param name: name of the mailbox + :type name: str + :rtype: Deferred + """ + name = normalize_mailbox(name) + + def set_subscribed(mbox): + return mbox.collection.set_mbox_attr("subscribed", True) + + d = self.getMailbox(name) + d.addCallback(set_subscribed) + return d + + def unsubscribe(self, name): + """ + Unsubscribe from this mailbox + + :param name: name of the mailbox + :type name: str + :rtype: Deferred + """ + # TODO should raise MailboxException if attempted to unsubscribe + # from a mailbox that is not currently subscribed. + # TODO factor out with subscribe method. + name = normalize_mailbox(name) + + def set_unsubscribed(mbox): + return mbox.collection.set_mbox_attr("subscribed", False) + + d = self.getMailbox(name) + d.addCallback(set_unsubscribed) + return d + + def getSubscriptions(self): + def get_subscribed(mailboxes): + return [x.mbox for x in mailboxes if x.subscribed] + + d = self.account.get_all_mailboxes() + d.addCallback(get_subscribed) + return d + + # + # INamespacePresenter + # + + def getPersonalNamespaces(self): + return [["", "/"]] + + def getSharedNamespaces(self): + return None + + def getOtherNamespaces(self): + return None + + def __repr__(self): + """ + Representation string for this object. + """ + return "<IMAPAccount (%s)>" % self.user_id |