mumble-django/pyweb/mumble/mmobjects.py

# -*- coding: utf-8 -*-
# kate: space-indent on; indent-width 4; replace-tabs on;

"""
 *  Copyright © 2009-2010, Michael "Svedrin" Ziegler <diese-addy@funzt-halt.net>
 *
 *  Mumble-Django 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 2 of the License, or
 *  (at your option) any later version.
 *
 *  This package 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.
"""

import socket
import datetime
import re
from time            import time

from django.utils.http        import urlquote
from django.conf        import settings


def cmp_channels( left, rite ):
    """ Compare two channels, first by position, and if that equals, by name. """
    if hasattr( left, "position" ) and hasattr( rite, "position" ):
        byorder = cmp( left.position, rite.position )
        if byorder != 0:
            return byorder
    return cmp_names( left, rite )

def cmp_names( left, rite ):
    """ Compare two objects by their name property. """
    return cmp( left.name, rite.name )


class mmChannel( object ):
    """ Represents a channel in Murmur. """

    def __init__( self, server, channel_obj, parent_chan = None ):
        self.server   = server
        self.players  = list()
        self.subchans = list()
        self.linked   = list()

        self.channel_obj = channel_obj
        self.chanid      = channel_obj.id

        self.parent = parent_chan
        if self.parent is not None:
            self.parent.subchans.append( self )

        self._acl = None

    # Lookup unknown attributes in self.channel_obj to automatically include Murmur's fields
    def __getattr__( self, key ):
        if hasattr( self.channel_obj, key ):
            return getattr( self.channel_obj, key )
        else:
            raise AttributeError( "'%s' object has no attribute '%s'" % ( self.__class__.__name__, key ) )

    def parent_channels( self ):
        """ Return the names of this channel's parents in the channel tree. """
        if self.parent is None or self.parent.is_server or self.parent.chanid == 0:
            return []
        return self.parent.parent_channels() + [self.parent.name]


    def getACL( self ):
        """ Retrieve the ACL for this channel. """
        if not self._acl:
            self._acl = mmACL( self, self.server.ctl.getACL( self.server.srvid, self.chanid ) )

        return self._acl

    acl = property( getACL )


    is_server  = False
    is_channel = True
    is_player  = False


    playerCount = property(
        lambda self: len( self.players ) + sum( [ chan.playerCount for chan in self.subchans ] ),
        doc="The number of players in this channel."
        )

    id   = property(
        lambda self: "channel_%d"%self.chanid,
        doc="A string ready to be used in an id property of an HTML tag."
        )

    top_or_not_empty = property(
        lambda self: self.parent is None or self.parent.chanid == 0 or self.playerCount > 0,
        doc="True if this channel needs to be shown because it is root, a child of root, or has players."
        )

    show =  property( lambda self: settings.SHOW_EMPTY_SUBCHANS or self.top_or_not_empty )

    def __str__( self ):
        return '<Channel "%s" (%d)>' % ( self.name, self.chanid )

    def sort( self ):
        """ Sort my subchannels and players, and then iterate over them and sort them recursively. """
        self.subchans.sort( cmp_channels )
        self.players.sort( cmp_names )
        for subc in self.subchans:
            subc.sort()

    def visit( self, callback, lvl = 0 ):
        """ Call callback on myself, then visit my subchans, then my players. """
        callback( self, lvl )
        for subc in self.subchans:
            subc.visit( callback, lvl + 1 )
        for plr in self.players:
            plr.visit( callback, lvl + 1 )


    def getURL( self, for_user = None ):
        """ Create an URL to connect to this channel. The URL is of the form
            mumble://username@host:port/parentchans/self.name
        """
        from urlparse import urlunsplit
        versionstr = "version=%s" % self.server.prettyversion

        if self.parent is not None:
            chanlist = self.parent_channels() + [self.name]
            chanlist = [ urlquote( chan ) for chan in chanlist ]
            urlpath  = "/".join( chanlist )
        else:
            urlpath  = ""

        if for_user is not None:
            netloc = "%s@%s" % ( for_user.name, self.server.netloc )
            return urlunsplit(( "mumble", netloc, urlpath, versionstr, "" ))
        else:
            return urlunsplit(( "mumble", self.server.netloc, urlpath, versionstr, "" ))

    connecturl = property( getURL )

    def setDefault( self ):
        """ Make this the server's default channel. """
        self.server.defchan = self.chanid
        self.server.save()

    is_default = property(
        lambda self: self.server.defchan == self.chanid,
        doc="True if this channel is the server's default channel."
        )

    def asDict( self ):
        chandata = self.channel_obj.__dict__.copy()
        chandata['players']  = [ pl.asDict() for pl in self.players  ]
        chandata['subchans'] = [ sc.asDict() for sc in self.subchans ]
        return chandata

    def asMvXml( self, parentnode ):
        """ Return an XML tree for this channel suitable for MumbleViewer-ng. """
        from xml.etree.cElementTree import SubElement
        me      = SubElement( parentnode, "item" , id=self.id, rel='channel' )
        content = SubElement( me,         "content" )
        name    = SubElement( content ,   "name" )
        name.text = self.name

        for sc in self.subchans:
            sc.asMvXml(me)
        for pl in self.players:
            pl.asMvXml(me)

    def asMvJson( self ):
        """ Return a Dict for this channel suitable for MumbleViewer-ng. """
        return  {
            "attributes": {
                "href": self.connecturl,
                "id":   self.id,
                "rel":  "channel",
                },
            "data": self.name,
            "children": [ sc.asMvJson() for sc in self.subchans ] + \
                    [ pl.asMvJson() for pl in self.players  ],
            "state": { False: "closed", True: "open" }[self.top_or_not_empty],
            }



class mmPlayer( object ):
    """ Represents a Player in Murmur. """

    def __init__( self, server, player_obj, player_chan ):
        self.player_obj    = player_obj

        self.onlinesince  = datetime.datetime.fromtimestamp( float( time() - player_obj.onlinesecs ) )
        self.channel      = player_chan
        self.channel.players.append( self )

        if self.isAuthed:
            from mumble.models import MumbleUser
            try:
                self.mumbleuser = MumbleUser.objects.get( mumbleid=self.userid, server=server )
            except MumbleUser.DoesNotExist:
                self.mumbleuser = None
        else:
            self.mumbleuser = None

    # Lookup unknown attributes in self.player_obj to automatically include Murmur's fields
    def __getattr__( self, key ):
        if hasattr( self.player_obj, key ):
            return getattr( self.player_obj, key )
        else:
            raise AttributeError( "'%s' object has no attribute '%s'" % ( self.__class__.__name__, key ) )

    def __str__( self ):
        return '<Player "%s" (%d, %d)>' % ( self.name, self.session, self.userid )

    hasComment = property(
        lambda self: hasattr( self.player_obj, "comment" ) and bool(self.player_obj.comment),
        doc="True if this player has a comment set."
        )

    isAuthed = property(
        lambda self: self.userid != -1,
        doc="True if this player is authenticated (+A)."
        )

    isAdmin = property(
        lambda self: self.mumbleuser and self.mumbleuser.getAdmin(),
        doc="True if this player is in the Admin group in the ACL."
        )

    is_server  = False
    is_channel = False
    is_player  = True

    def getIpAsString( self ):
        """ Get the client's IPv4 or IPv6 address, in a pretty format. """
        addr = self.player_obj.address
        if max( addr[:10] ) == 0 and addr[10:12] == (255, 255):
            return "%d.%d.%d.%d" % tuple( addr[12:] )
        ip6addr = [(hi << 8 | lo) for (hi, lo) in zip(addr[0::2], addr[1::2])]
        # colon-separated string:
        ipstr = ':'.join([ ("%x" % part) for part in ip6addr ])
        # 0:0:0 -> ::
        return re.sub( "((^|:)(0:){2,})", '::', ipstr, 1 )

    ipaddress = property( getIpAsString )
    fqdn      = property( lambda self: socket.getfqdn( self.ipaddress ),
        doc="The fully qualified domain name of the user's host." )

    # kept for compatibility to mmChannel (useful for traversal funcs)
    playerCount = property( lambda self: -1, doc="Exists only for compatibility to mmChannel." )

    id = property(
        lambda self: "player_%d"%self.session,
        doc="A string ready to be used in an id property of an HTML tag."
        )

    def visit( self, callback, lvl = 0 ):
        """ Call callback on myself. """
        callback( self, lvl )

    def asDict( self ):
        pldata = self.player_obj.__dict__.copy()

        if self.mumbleuser:
            if self.mumbleuser.hasTexture():
                pldata['texture'] = self.mumbleuser.textureUrl

        return pldata

    def asMvXml( self, parentnode ):
        """ Return an XML node for this player suitable for MumbleViewer-ng. """
        from xml.etree.cElementTree import SubElement
        me      = SubElement( parentnode, "item" , id=self.id, rel='user' )
        content = SubElement( me,         "content" )
        name    = SubElement( content ,   "name" )
        name.text = self.name

    def asMvJson( self ):
        """ Return a Dict for this player suitable for MumbleViewer-ng. """
        return {
            "attributes": {
                "id":   self.id,
                "rel":  "user",
                },
            'data': self.name,
            }



class mmACL( object ):
    """ Represents an ACL for a certain channel. """

    def __init__( self, channel, acl_obj ):
        self.channel = channel
        self.acls, self.groups, self.inherit = acl_obj

        self.groups_dict = {}

        for group in self.groups:
            self.groups_dict[ group.name ] = group

    def group_has_member( self, name, userid ):
        """ Checks if the given userid is a member of the given group in this channel. """
        if name not in self.groups_dict:
            raise ReferenceError( "No such group '%s'" % name )

        return userid in self.groups_dict[name].add or userid in self.groups_dict[name].members

    def group_add_member( self, name, userid ):
        """ Make sure this userid is a member of the group in this channel (and subs). """
        if name not in self.groups_dict:
            raise ReferenceError( "No such group '%s'" % name )

        group = self.groups_dict[name]

        # if neither inherited nor to be added, add
        if userid not in group.members and userid not in group.add:
            group.add.append( userid )

        # if to be removed, unremove
        if userid in group.remove:
            group.remove.remove( userid )

    def group_remove_member( self, name, userid ):
        """ Make sure this userid is NOT a member of the group in this channel (and subs). """
        if name not in self.groups_dict:
            raise ReferenceError( "No such group '%s'" % name )

        group = self.groups_dict[name]

        # if added here, unadd
        if userid in group.add:
            group.add.remove( userid )
        # if member and not in remove, add to remove
        elif userid in group.members and userid not in group.remove:
            group.remove.append( userid )

    def save( self ):
        """ Send this ACL to Murmur. """
        return self.channel.server.ctl.setACL(
            self.channel.server.srvid,
            self.channel.chanid,
            self.acls, self.groups, self.inherit
            )