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