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