# -*- coding: UTF-8 -*-

# Copyright (c) 2007 - 2010, Pascal Volk

# See COPYING for distribution information.

"""Virtual Mail Manager's Account class to manage e-mail accounts."""

import VirtualMailManager.constants.ERROR as ERR

from VirtualMailManager.Domain import Domain

from VirtualMailManager.EmailAddress import EmailAddress

from VirtualMailManager.errors import AccountError as AccE

from VirtualMailManager.MailLocation import MailLocation

from VirtualMailManager.Transport import Transport

class Account(object):

    """Class to manage e-mail accounts."""

    __slots__ = ('_addr','_base','_gid','_mid','_passwd','_tid','_uid','_dbh')

    def __init__(self, dbh, address, password=None):

        self._dbh = dbh

        self._base = None

        if isinstance(address, EmailAddress):

            self._addr = address

        else:

            raise TypeError("Argument 'address' is not an EmailAddress")

        self._uid = 0

        self._gid = 0

        self._mid = 0

        self._tid = 0

        self._passwd = password

        self._setAddr()

        self._exists()

        from VirtualMailManager.Handler import Handler

        if self._uid < 1 and Handler.aliasExists(self._dbh, self._addr):

            # TP: Hm, what quotation marks should be used?

            # If you are unsure have a look at:

            # http://en.wikipedia.org/wiki/Quotation_mark,_non-English_usage

            raise AccE(_(u"There is already an alias with the address “%s”.") %

                       self._addr, ERR.ALIAS_EXISTS)

        if self._uid < 1 and Handler.relocatedExists(self._dbh, self._addr):

            raise AccE(

              _(u"There is already a relocated user with the address “%s”.") %

                       self._addr, ERR.RELOCATED_EXISTS)

    def _exists(self):

        dbc = self._dbh.cursor()

        dbc.execute(

            "SELECT uid, mid, tid FROM users WHERE gid=%s AND local_part=%s",

                    self._gid, self._addr._localpart)

        result = dbc.fetchone()

        dbc.close()

        if result is not None:

            self._uid, self._mid, self._tid = result

            return True

        else:

            return False

    def _setAddr(self):

        dom = Domain(self._dbh, self._addr._domainname)

        self._gid = dom.getID()

        if self._gid == 0:

            raise AccE(_(u"The domain “%s” doesn't exist.") %

                       self._addr._domainname, ERR.NO_SUCH_DOMAIN)

        self._base = dom.getDir()

        self._tid = dom.getTransportID()

    def _setID(self):

        dbc = self._dbh.cursor()

        dbc.execute("SELECT nextval('users_uid')")

        self._uid = dbc.fetchone()[0]

        dbc.close()

    def _prepare(self, maillocation):

        self._setID()

        self._mid = MailLocation(self._dbh, maillocation=maillocation).getID()

    def _switchState(self, state, dcvers, service):

        if not isinstance(state, bool):

            return False

        if not service in (None, 'all', 'imap', 'pop3', 'sieve', 'smtp'):

            raise AccE(_(u"Unknown service “%s”.") % service,

                    ERR.UNKNOWN_SERVICE)

        if self._uid < 1:

            raise AccE(_(u"The account “%s” doesn't exist.") % self._addr,

                    ERR.NO_SUCH_ACCOUNT)

        if dcvers > 11:

            sieve_col = 'sieve'

        else:

            sieve_col = 'managesieve'

        if service in ('smtp', 'pop3', 'imap'):

            sql = 'UPDATE users SET %s = %s WHERE uid = %d' % (service, state,

                    self._uid)

        elif service == 'sieve':

            sql = 'UPDATE users SET %s = %s WHERE uid = %d' % (sieve_col,

                    state, self._uid)

        else:

            sql = 'UPDATE users SET smtp = %(s)s, pop3 = %(s)s, imap = %(s)s,\

 %(col)s = %(s)s WHERE uid = %(uid)d' % {

                's': state, 'col': sieve_col, 'uid': self._uid}

        dbc = self._dbh.cursor()

        dbc.execute(sql)

        if dbc.rowcount > 0:

            self._dbh.commit()

        dbc.close()

    def __aliaseCount(self):

        dbc = self._dbh.cursor()

        q = "SELECT COUNT(destination) FROM alias WHERE destination = '%s'"\

            %self._addr

        dbc.execute(q)

        a_count = dbc.fetchone()[0]

        dbc.close()

        return a_count

    def setPassword(self, password):

        self._passwd = password

    def getUID(self):

        return self._uid

    def getGID(self):

        return self._gid

    def getDir(self, directory):

        if directory == 'domain':

            return '%s' % self._base

        elif directory == 'home':

            return '%s/%i' % (self._base, self._uid)

    def enable(self, dcvers, service=None):

        self._switchState(True, dcvers, service)

    def disable(self, dcvers, service=None):

        self._switchState(False, dcvers, service)

    def save(self, maillocation, dcvers, smtp, pop3, imap, sieve):

        if self._uid < 1:

            if dcvers > 11:

                sieve_col = 'sieve'

            else:

                sieve_col = 'managesieve'

            self._prepare(maillocation)

            sql = "INSERT INTO users (local_part, passwd, uid, gid, mid, tid,\

 smtp, pop3, imap, %s) VALUES ('%s', '%s', %d, %d, %d, %d, %s, %s, %s, %s)" % (

                sieve_col, self._addr._localpart, self._passwd, self._uid,

                self._gid, self._mid, self._tid, smtp, pop3, imap, sieve)

            dbc = self._dbh.cursor()

            dbc.execute(sql)

            self._dbh.commit()

            dbc.close()

        else:

            raise AccE(_(u'The account “%s” already exists.') % self._addr,

                    ERR.ACCOUNT_EXISTS)

    def modify(self, what, value):

        if self._uid == 0:

            raise AccE(_(u"The account “%s” doesn't exist.") % self._addr,

                    ERR.NO_SUCH_ACCOUNT)

        if what not in ['name', 'password', 'transport']:

            return False

        dbc = self._dbh.cursor()

        if what == 'password':

            dbc.execute('UPDATE users SET passwd = %s WHERE uid = %s',

                    value, self._uid)

        elif what == 'transport':

            self._tid = Transport(self._dbh, transport=value).getID()

            dbc.execute('UPDATE users SET tid = %s WHERE uid = %s',

                    self._tid, self._uid)

        else:

            dbc.execute('UPDATE users SET name = %s WHERE uid = %s',

                    value, self._uid)

        if dbc.rowcount > 0:

            self._dbh.commit()

        dbc.close()

    def getInfo(self, dcvers):

        if dcvers > 11:

            sieve_col = 'sieve'

        else:

            sieve_col = 'managesieve'

        sql = 'SELECT name, uid, gid, mid, tid, smtp, pop3, imap, %s\

 FROM users WHERE uid = %d' % (sieve_col, self._uid)

        dbc = self._dbh.cursor()

        dbc.execute(sql)

        info = dbc.fetchone()

        dbc.close()

        if info is None:

            raise AccE(_(u"The account “%s” doesn't exist.") % self._addr,

                    ERR.NO_SUCH_ACCOUNT)

        else:

            keys = ['name', 'uid', 'gid', 'maildir', 'transport', 'smtp',

                    'pop3', 'imap', sieve_col]

            info = dict(zip(keys, info))

            for service in ('smtp', 'pop3', 'imap', sieve_col):

                if bool(info[service]):

                    # TP: A service (pop3/imap/…) is enabled/usable for a user

                    info[service] = _('enabled')

                else:

                    # TP: A service (pop3/imap) isn't enabled/usable for a user

                    info[service] = _('disabled')

            info['address'] = self._addr

            info['maildir'] = '%s/%s/%s' % (self._base, info['uid'],

                    MailLocation(self._dbh,

                        mid=info['maildir']).getMailLocation())

            info['transport'] = Transport(self._dbh,

                    tid=info['transport']).getTransport()

            return info

    def getAliases(self):

        dbc = self._dbh.cursor()

        dbc.execute("SELECT address ||'@'|| domainname FROM alias, domain_name\

 WHERE destination = %s AND domain_name.gid = alias.gid\

 AND domain_name.is_primary ORDER BY address", str(self._addr))

        addresses = dbc.fetchall()

        dbc.close()

        aliases = []

        if len(addresses) > 0:

            aliases = [alias[0] for alias in addresses]

        return aliases

    def delete(self, delalias):

        if self._uid < 1:

            raise AccE(_(u"The account “%s” doesn't exist.") % self._addr,

                    ERR.NO_SUCH_ACCOUNT)

        dbc = self._dbh.cursor()

        if delalias == 'delalias':

            dbc.execute('DELETE FROM users WHERE uid= %s', self._uid)

            u_rc = dbc.rowcount

            # delete also all aliases where the destination address is the same

            # as for this account.

            dbc.execute("DELETE FROM alias WHERE destination = %s",

                    str(self._addr))

            if u_rc > 0 or dbc.rowcount > 0:

                self._dbh.commit()

        else: # check first for aliases

            a_count = self.__aliaseCount()

            if a_count == 0:

                dbc.execute('DELETE FROM users WHERE uid = %s', self._uid)

                if dbc.rowcount > 0:

                    self._dbh.commit()

            else:

                dbc.close()

                raise AccE(

                  _(u"There are %(count)d aliases with the destination address\

 “%(address)s”.") %{'count': a_count, 'address': self._addr}, ERR.ALIAS_PRESENT)

        dbc.close()

def getAccountByID(uid, dbh):

    try:

        uid = long(uid)

    except ValueError:

        raise AccE(_(u'uid must be an int/long.'), ERR.INVALID_AGUMENT)

    if uid < 1:

        raise AccE(_(u'uid must be greater than 0.'), ERR.INVALID_AGUMENT)

    dbc = dbh.cursor()

    dbc.execute("SELECT local_part||'@'|| domain_name.domainname AS address,\

 uid, users.gid FROM users LEFT JOIN domain_name ON (domain_name.gid \

 = users.gid AND is_primary) WHERE uid = %s;", uid)

    info = dbc.fetchone()

    dbc.close()

    if info is None:

        raise AccE(_(u"There is no account with the UID “%d”.") % uid,

                ERR.NO_SUCH_ACCOUNT)

    keys = ['address', 'uid', 'gid']

    info = dict(zip(keys, info))

    return info