VirtualMailManager/alias.py
author martin f. krafft <madduck@madduck.net>
Sun, 15 Apr 2012 13:17:21 +0200
branchv0.6.x
changeset 555 499c63f52462
parent 425 8394e222aba3
child 568 14abdd04ddf5
permissions -rw-r--r--
Provide list{addresses,aliases,users,relocated} subcommands The patch provides the list{addresses,aliases,users,relocated} subcommands to the UI. All commands actually take the same path in the code and only one query is run with different parameters for each case. There are still two shortcomings: 1. With alias domains, the output order is not as one might want it, e.g. foo@example.org bar@example.org foo@example.com bar@example.com when it should really be foo@ twice and then bar@ twice. I have not found a way to modify the SQL accordingly. 2. The SELECT queries for Accounts, Alias and Relocated are hard-coded in common.py.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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# -*- coding: UTF-8 -*-
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# Copyright (c) 2007 - 2011, Pascal Volk
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# See COPYING for distribution information.
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"""
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    VirtualMailManager.alias
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    ~~~~~~~~~~~~~~~~~~~~~~~~
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    Virtual Mail Manager's Alias class to manage e-mail aliases.
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"""
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from VirtualMailManager.domain import get_gid
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from VirtualMailManager.emailaddress import \
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     EmailAddress, DestinationEmailAddress as DestAddr
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from VirtualMailManager.errors import AliasError as AErr
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from VirtualMailManager.ext.postconf import Postconf
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from VirtualMailManager.pycompat import all
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from VirtualMailManager.constants import \
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     ALIAS_EXCEEDS_EXPANSION_LIMIT, NO_SUCH_ALIAS, NO_SUCH_DOMAIN
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_ = lambda msg: msg
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cfg_dget = lambda option: None
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class Alias(object):
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    """Class to manage e-mail aliases."""
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    __slots__ = ('_addr', '_dests', '_gid', '_dbh')
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    def __init__(self, dbh, address):
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        assert isinstance(address, EmailAddress)
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        self._addr = address
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        self._dbh = dbh
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        self._gid = get_gid(self._dbh, self._addr.domainname)
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        if not self._gid:
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            raise AErr(_(u"The domain '%s' does not exist.") %
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                       self._addr.domainname, NO_SUCH_DOMAIN)
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        self._dests = []
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        self._load_dests()
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    def _load_dests(self):
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        """Loads all known destination addresses into the _dests list."""
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        dbc = self._dbh.cursor()
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        dbc.execute('SELECT destination FROM alias WHERE gid = %s AND '
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                    'address = %s', (self._gid, self._addr.localpart))
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        dests = dbc.fetchall()
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        if dbc.rowcount > 0:
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            self._dests.extend(DestAddr(dest[0], self._dbh) for dest in dests)
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        dbc.close()
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    def _check_expansion(self, count_new):
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        """Checks the current expansion limit of the alias."""
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        postconf = Postconf(cfg_dget('bin.postconf'))
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        limit = long(postconf.read('virtual_alias_expansion_limit'))
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        dcount = len(self._dests)
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        failed = False
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        if dcount == limit or dcount + count_new > limit:
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            failed = True
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            errmsg = _(
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u"""Cannot add %(count_new)i new destination(s) to alias '%(address)s'.
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Currently this alias expands into %(count)i/%(limit)i recipients.
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%(count_new)i additional destination(s) will render this alias unusable.
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Hint: Increase Postfix' virtual_alias_expansion_limit""")
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        elif dcount > limit:
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            failed = True
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            errmsg = _(
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u"""Cannot add %(count_new)i new destination(s) to alias '%(address)s'.
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This alias already exceeds its expansion limit (%(count)i/%(limit)i).
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So its unusable, all messages addressed to this alias will be bounced.
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Hint: Delete some destination addresses.""")
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        if failed:
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            raise AErr(errmsg % {'address': self._addr, 'count': dcount,
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                                 'limit': limit, 'count_new': count_new},
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                       ALIAS_EXCEEDS_EXPANSION_LIMIT)
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    def _delete(self, destination=None):
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        """Deletes a destination from the alias, if ``destination`` is
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        not ``None``.  If ``destination`` is None, the alias with all
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        its destination addresses will be deleted.
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        """
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        dbc = self._dbh.cursor()
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        if not destination:
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            dbc.execute('DELETE FROM alias WHERE gid = %s AND address = %s',
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                        (self._gid, self._addr.localpart))
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        else:
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            dbc.execute('DELETE FROM alias WHERE gid = %s AND address = %s '
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                        'AND destination = %s',
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                        (self._gid, self._addr.localpart, str(destination)))
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        if dbc.rowcount > 0:
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            self._dbh.commit()
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        dbc.close()
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    def __len__(self):
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        """Returns the number of destinations of the alias."""
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        return len(self._dests)
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    @property
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    def address(self):
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        """The Alias' EmailAddress instance."""
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        return self._addr
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    def add_destinations(self, destinations, warnings=None):
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        """Adds the `EmailAddress`es from *destinations* list to the
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        destinations of the alias.
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        Destinations, that are already assigned to the alias, will be
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        removed from *destinations*.  When done, this method will return
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        a set with all destinations, that were saved in the database.
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        """
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        destinations = set(destinations)
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        assert destinations and \
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                all(isinstance(dest, EmailAddress) for dest in destinations)
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        if not warnings is None:
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            assert isinstance(warnings, list)
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        if self._addr in destinations:
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            destinations.remove(self._addr)
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            if not warnings is None:
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                warnings.append(self._addr)
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        duplicates = destinations.intersection(set(self._dests))
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        if duplicates:
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            destinations.difference_update(set(self._dests))
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            if not warnings is None:
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                warnings.extend(duplicates)
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        if not destinations:
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            return destinations
322
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        self._check_expansion(len(destinations))
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        dbc = self._dbh.cursor()
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        dbc.executemany("INSERT INTO alias (gid, address, destination) "
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                        "VALUES (%d, '%s', %%s)" % (self._gid,
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                                                    self._addr.localpart),
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                        ((str(destination),) for destination in destinations))
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        self._dbh.commit()
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        dbc.close()
221
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        self._dests.extend(destinations)
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        return destinations
0
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    def del_destination(self, destination):
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        """Deletes the specified ``destination`` address from the alias."""
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        assert isinstance(destination, EmailAddress)
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        if not self._dests:
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            raise AErr(_(u"The alias '%s' does not exist.") % self._addr,
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                       NO_SUCH_ALIAS)
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        if not destination in self._dests:
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            raise AErr(_(u"The address '%(addr)s' is not a destination of "
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                         u"the alias '%(alias)s'.") % {'addr': destination,
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                       'alias': self._addr}, NO_SUCH_ALIAS)
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        self._delete(destination)
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        self._dests.remove(destination)
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    def get_destinations(self):
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        """Returns an iterator for all destinations of the alias."""
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        if not self._dests:
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            raise AErr(_(u"The alias '%s' does not exist.") % self._addr,
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                       NO_SUCH_ALIAS)
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        return iter(self._dests)
0
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    def delete(self):
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   159
        """Deletes the alias with all its destinations."""
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        if not self._dests:
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            raise AErr(_(u"The alias '%s' does not exist.") % self._addr,
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   162
                       NO_SUCH_ALIAS)
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        self._delete()
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   164
        del self._dests[:]
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   165
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   166
del _, cfg_dget