plugins/muc/mod_muc.lua

   1 -- Prosody IM
   2 -- Copyright (C) 2008-2010 Matthew Wild
   3 -- Copyright (C) 2008-2010 Waqas Hussain
   4 --
   5 -- This project is MIT/X11 licensed. Please see the
   6 -- COPYING file in the source package for more information.
   7 --
   8
   9
  10 if module:get_host_type() ~= "component" then
  11         error("MUC should be loaded as a component, please see http://prosody.im/doc/components", 0);
  12 end
  13
  14 local muc_host = module:get_host();
  15 local muc_name = module:get_option("name");
  16 if type(muc_name) ~= "string" then muc_name = "Prosody Chatrooms"; end
  17 local restrict_room_creation = module:get_option("restrict_room_creation");
  18 if restrict_room_creation then
  19         if restrict_room_creation == true then
  20                 restrict_room_creation = "admin";
  21         elseif restrict_room_creation ~= "admin" and restrict_room_creation ~= "local" then
  22                 restrict_room_creation = nil;
  23         end
  24 end
  25 local muc_new_room = module:require "muc".new_room;
  26 local jid_split = require "util.jid".split;
  27 local jid_bare = require "util.jid".bare;
  28 local st = require "util.stanza";
  29 local uuid_gen = require "util.uuid".generate;
  30 local datamanager = require "util.datamanager";
  31 local um_is_admin = require "core.usermanager".is_admin;
  32
  33 rooms = {};
  34 local rooms = rooms;
  35 local persistent_rooms = datamanager.load(nil, muc_host, "persistent") or {};
  36 local component = hosts[module.host];
  37
  38 -- Configurable options
  39 local max_history_messages = module:get_option_number("max_history_messages");
  40
  41 local function is_admin(jid)
  42         return um_is_admin(jid, module.host);
  43 end
  44
  45 local function room_route_stanza(room, stanza) core_post_stanza(component, stanza); end
  46 local function room_save(room, forced)
  47         local node = jid_split(room.jid);
  48         persistent_rooms[room.jid] = room._data.persistent;
  49         if room._data.persistent then
  50                 local history = room._data.history;
  51                 room._data.history = nil;
  52                 local data = {
  53                         jid = room.jid;
  54                         _data = room._data;
  55                         _affiliations = room._affiliations;
  56                 };
  57                 datamanager.store(node, muc_host, "config", data);
  58                 room._data.history = history;
  59         elseif forced then
  60                 datamanager.store(node, muc_host, "config", nil);
  61                 if not next(room._occupants) then -- Room empty
  62                         rooms[room.jid] = nil;
  63                 end
  64         end
  65         if forced then datamanager.store(nil, muc_host, "persistent", persistent_rooms); end
  66 end
  67
  68 for jid in pairs(persistent_rooms) do
  69         local node = jid_split(jid);
  70         local data = datamanager.load(node, muc_host, "config") or {};
  71         local room = muc_new_room(jid, {
  72                 history_length = max_history_messages;
  73         });
  74         room._data = data._data;
  75         room._data.history_length = max_history_messages; --TODO: Need to allow per-room with a global limit
  76         room._affiliations = data._affiliations;
  77         room.route_stanza = room_route_stanza;
  78         room.save = room_save;
  79         rooms[jid] = room;
  80 end
  81
  82 local host_room = muc_new_room(muc_host, {
  83         history_length = max_history_messages;
  84 });
  85 host_room.route_stanza = room_route_stanza;
  86 host_room.save = room_save;
  87
  88 local function get_disco_info(stanza)
  89         return st.iq({type='result', id=stanza.attr.id, from=muc_host, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#info")
  90                 :tag("identity", {category='conference', type='text', name=muc_name}):up()
  91                 :tag("feature", {var="http://jabber.org/protocol/muc"}); -- TODO cache disco reply
  92 end
  93 local function get_disco_items(stanza)
  94         local reply = st.iq({type='result', id=stanza.attr.id, from=muc_host, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#items");
  95         for jid, room in pairs(rooms) do
  96                 if not room:is_hidden() then
  97                         reply:tag("item", {jid=jid, name=room:get_name()}):up();
  98                 end
  99         end
 100         return reply; -- TODO cache disco reply
 101 end
 102
 103 local function handle_to_domain(event)
 104         local origin, stanza = event.origin, event.stanza;
 105         local type = stanza.attr.type;
 106         if type == "error" or type == "result" then return; end
 107         if stanza.name == "iq" and type == "get" then
 108                 local xmlns = stanza.tags[1].attr.xmlns;
 109                 if xmlns == "http://jabber.org/protocol/disco#info" then
 110                         origin.send(get_disco_info(stanza));
 111                 elseif xmlns == "http://jabber.org/protocol/disco#items" then
 112                         origin.send(get_disco_items(stanza));
 113                 elseif xmlns == "http://jabber.org/protocol/muc#unique" then
 114                         origin.send(st.reply(stanza):tag("unique", {xmlns = xmlns}):text(uuid_gen())); -- FIXME Random UUIDs can theoretically have collisions
 115                 else
 116                         origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- TODO disco/etc
 117                 end
 118         else
 119                 host_room:handle_stanza(origin, stanza);
 120                 --origin.send(st.error_reply(stanza, "cancel", "service-unavailable", "The muc server doesn't deal with messages and presence directed at it"));
 121         end
 122         return true;
 123 end
 124
 125 function stanza_handler(event)
 126         local origin, stanza = event.origin, event.stanza;
 127         local bare = jid_bare(stanza.attr.to);
 128         local room = rooms[bare];
 129         if not room then
 130                 if not(restrict_room_creation) or
 131                   (restrict_room_creation == "admin" and is_admin(stanza.attr.from)) or
 132                   (restrict_room_creation == "local" and select(2, jid_split(stanza.attr.from)) == module.host:gsub("^[^%.]+%.", "")) then
 133                         room = muc_new_room(bare, {
 134                                 history_length = max_history_messages;
 135                         });
 136                         room.route_stanza = room_route_stanza;
 137                         room.save = room_save;
 138                         rooms[bare] = room;
 139                 end
 140         end
 141         if room then
 142                 room:handle_stanza(origin, stanza);
 143                 if not next(room._occupants) and not persistent_rooms[room.jid] then -- empty, non-persistent room
 144                         rooms[bare] = nil; -- discard room
 145                 end
 146         else
 147                 origin.send(st.error_reply(stanza, "cancel", "not-allowed"));
 148         end
 149         return true;
 150 end
 151 module:hook("iq/bare", stanza_handler, -1);
 152 module:hook("message/bare", stanza_handler, -1);
 153 module:hook("presence/bare", stanza_handler, -1);
 154 module:hook("iq/full", stanza_handler, -1);
 155 module:hook("message/full", stanza_handler, -1);
 156 module:hook("presence/full", stanza_handler, -1);
 157 module:hook("iq/host", handle_to_domain, -1);
 158 module:hook("message/host", handle_to_domain, -1);
 159 module:hook("presence/host", handle_to_domain, -1);
 160
 161 hosts[module.host].send = function(stanza) -- FIXME do a generic fix
 162         if stanza.attr.type == "result" or stanza.attr.type == "error" then
 163                 core_post_stanza(component, stanza);
 164         else error("component.send only supports result and error stanzas at the moment"); end
 165 end
 166
 167 prosody.hosts[module:get_host()].muc = { rooms = rooms };
 168
 169 module.save = function()
 170         return {rooms = rooms};
 171 end
 172 module.restore = function(data)
 173         for jid, oldroom in pairs(data.rooms or {}) do
 174                 local room = muc_new_room(jid);
 175                 room._jid_nick = oldroom._jid_nick;
 176                 room._occupants = oldroom._occupants;
 177                 room._data = oldroom._data;
 178                 room._affiliations = oldroom._affiliations;
 179                 room.route_stanza = room_route_stanza;
 180                 room.save = room_save;
 181                 rooms[jid] = room;
 182         end
 183         prosody.hosts[module:get_host()].muc = { rooms = rooms };
 184 end