VirtualMailManager/Domain.py
author Pascal Volk <neverseen@users.sourceforge.net>
Tue, 15 Jan 2008 01:33:25 +0000
changeset 6 07d141039f74
parent 4 f3c30b7421b9
child 8 7e3ce56f49e6
permissions -rw-r--r--
* 'create_tables.pgsql' - create separate tables for transport an maildir-folder - assigned transport to users table - adjusted some views
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#!/usr/bin/env python
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# -*- coding: UTF-8 -*-
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# opyright 2007-2008 VEB IT
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# See COPYING for distribution information.
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# $Id$
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"""Virtual Mail Manager's Domain class to manage e-mail domains."""
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from constants.VERSION import VERSION
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__author__ = 'Pascal Volk <p.volk@veb-it.de>'
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__version__ = VERSION
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__revision__ = 'rev '+'$Rev$'.split()[1]
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__date__ = '$Date$'.split()[1]
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from random import choice
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from Exceptions import VMMDomainException
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import constants.ERROR as ERR
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MAILDIR_CHARS = '0123456789abcdefghijklmnopqrstuvwxyz'
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class Domain:
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    """Class to manage e-mail domains."""
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    def __init__(self, dbh, domainname, basedir, transport=None):
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        """Creates a new Domain instance.
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        Keyword arguments:
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        dbh -- a pyPgSQL.PgSQL.connection
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        domainname -- name of the domain (str)
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        transport -- see transport(5), default 'dovecot:'  (str)
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        """
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        self._dbh = dbh
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        self._name = domainname
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        self._basedir = basedir
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        if transport is None:
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            self._transport = 'dovecot:'
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        else:
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            self._transport = transport
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        self._id = 0
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        self._domaindir = None
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        self._exists()
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    def _exists(self):
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        """Checks if the domain already exists.
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        If the domain exists _id will be set and returns True, otherwise False
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        will be returned.
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        """
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        dbc = self._dbh.cursor()
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        dbc.execute("SELECT gid, domaindir FROM domains WHERE domainname=%s",
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                self._name)
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        result = dbc.fetchone()
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        dbc.close()
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        if result is not None:
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            self._id, self._domaindir = result[0], result[1]
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            return True
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        else:
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            return False
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    def _setID(self):
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        """Sets the ID of the domain."""
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        dbc = self._dbh.cursor()
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        dbc.execute("SELECT nextval('domains_gid')")
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        self._id = dbc.fetchone()[0]
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        dbc.close()
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    def _prepare(self):
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        self._setID()
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        self._domaindir = "%s/%s/%i" % (self._basedir, choice(MAILDIR_CHARS),
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                self._id)
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    def _has(self, what):
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        """Checks if aliases or accounts are assigned to the domain.
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        If there are assigned accounts or aliases True will be returned,
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        otherwise False will be returned.
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        Keyword arguments:
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        what -- 'alias' or 'users' (strings)
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        """
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        if what not in ['alias', 'users']:
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            return False
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        dbc = self._dbh.cursor()
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        if what == 'users':
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            dbc.execute("SELECT count(gid) FROM users WHERE gid=%s", self._id)
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        else:
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            dbc.execute("SELECT count(gid) FROM alias WHERE gid=%s", self._id)
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        count = dbc.fetchone()
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        dbc.close()
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        if count[0] > 0:
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            return True
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        else:
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            return False
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    def _chkDelete(self, delUser, delAlias):
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        """Checks dependencies for deletion.
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        Keyword arguments:
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        delUser -- ignore available accounts (bool)
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        delAlias -- ignore available aliases (bool)
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        """
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        if not delUser:
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            hasUser = self._has('users')
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        else:
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            hasUser = False
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        if not delAlias:
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            hasAlias = self._has('alias')
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        else:
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            hasAlias = False
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        if hasUser and hasAlias:
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            raise VMMDomainException(('There are accounts and aliases.',
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                ERR.ACCOUNT_AND_ALIAS_PRESENT))
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        elif hasUser:
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            raise VMMDomainException(('There are accounts.',
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                ERR.ACCOUNT_PRESENT))
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        elif hasAlias:
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            raise VMMDomainException(('There are aliases.', ERR.ALIAS_PRESENT))
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    def save(self):
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        """Stores the new domain in the database."""
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        if self._id < 1:
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            self._prepare()
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            dbc = self._dbh.cursor()
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            dbc.execute("INSERT INTO domains (gid, domainname, transport,\
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 domaindir) VALUES (%s, %s, %s, %s)", self._id, self._name, self._transport,
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                self._domaindir)
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            self._dbh.commit()
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            dbc.close()
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        else:
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            raise VMMDomainException(('Domain already exists.',
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                ERR.DOMAIN_EXISTS))
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    def delete(self, delUser=False, delAlias=False):
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        """Deletes the domain.
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        Keyword arguments:
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        delUser -- force deletion of available accounts (bool)
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        delAlias -- force deletion of available aliases (bool)
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        """
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        if self._id > 0:
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            self._chkDelete(delUser, delAlias)
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            dbc = self._dbh.cursor()
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            dbc.execute('DELETE FROM alias WHERE gid=%s', self._id)
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            dbc.execute('DELETE FROM users WHERE gid=%s', self._id)
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            dbc.execute('DELETE FROM relocated WHERE gid=%s', self._id)
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            dbc.execute('DELETE FROM domains WHERE gid=%s', self._id)
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            self._dbh.commit()
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            dbc.close()
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        else:
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            raise VMMDomainException(("Domain doesn't exist yet.",
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                ERR.NO_SUCH_DOMAIN))
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    def updateTransport(self, transport):
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        """Sets a new transport for the domain.
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        Keyword arguments:
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        transport -- the new transport (str)
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        """
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        if self._id > 0:
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            dbc = self._dbh.cursor()
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            dbc.execute("UPDATE domains SET transport=%s WHERE gid=%s",
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                    transport, self._id)
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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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        else:
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            raise VMMDomainException(("Domain doesn't exist yet.",
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                ERR.NO_SUCH_DOMAIN))
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    def getID(self):
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        """Returns the ID of the domain."""
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        return self._id
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    def getDir(self):
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        """Returns the directory of the domain."""
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        return self._domaindir
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    def getInfo(self):
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        """Returns a dictionary with information about the domain."""
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        sql = """\
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SELECT gid, domainname, transport, domaindir, count(uid) AS accounts, aliases
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  FROM domains
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       LEFT JOIN users USING (gid)
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       LEFT JOIN vmm_alias_count USING (gid)
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 WHERE gid = %i
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GROUP BY gid, domainname, transport, domaindir, aliases""" % self._id
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        dbc = self._dbh.cursor()
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        dbc.execute(sql)
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        info = dbc.fetchone()
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        dbc.close()
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        if info is None:
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            raise VMMDomainException(("Domain doesn't exist yet.",
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                ERR.NO_SUCH_DOMAIN))
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        else:
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            keys = ['gid', 'domainname', 'transport', 'domaindir', 'accounts',
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                    'aliases']
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            return dict(zip(keys, info))
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    def getAccounts(self):
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        """Returns a list with all accounts from the domain."""
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        dbc = self._dbh.cursor()
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        dbc.execute("SELECT userid AS users FROM dovecot_user WHERE gid = %s",
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                self._id)
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        users = dbc.fetchall()
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        dbc.close()
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        accounts = []
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        if len(users) > 0:
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            for account in users:
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                accounts.append(account[0])
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        return accounts
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    def getAliases(self):
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        """Returns a list with all aliases from the domain."""
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        dbc = self._dbh.cursor()
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        dbc.execute("SELECT DISTINCT address FROM postfix_alias WHERE gid=%s",
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                self._id)
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        addresses = dbc.fetchall()
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        dbc.close()
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        aliases = []
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        if len(addresses) > 0:
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            for alias in addresses:
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                aliases.append(alias[0])
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        return aliases