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 local hosts = hosts;
  33
  34 rooms = {};
  35 local rooms = rooms;
  36 local persistent_rooms = datamanager.load(nil, muc_host, "persistent") or {};
  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) module:send(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 local persistent_errors = false;
  69 for jid in pairs(persistent_rooms) do
  70         local node = jid_split(jid);
  71         local data = datamanager.load(node, muc_host, "config");
  72         if data then
  73                 local room = muc_new_room(jid, {
  74                         max_history_length = max_history_messages;
  75                 });
  76                 room._data = data._data;
  77                 room._data.max_history_length = max_history_messages; -- Overwrite old max_history_length in data with current settings
  78                 room._affiliations = data._affiliations;
  79                 room.route_stanza = room_route_stanza;
  80                 room.save = room_save;
  81                 rooms[jid] = room;
  82         else -- missing room data
  83                 persistent_rooms[jid] = nil;
  84                 module:log("error", "Missing data for room '%s', removing from persistent room list", jid);
  85                 persistent_errors = true;
  86         end
  87 end
  88 if persistent_errors then datamanager.store(nil, muc_host, "persistent", persistent_rooms); end
  89
  90 local host_room = muc_new_room(muc_host, {
  91         max_history_length = max_history_messages;
  92 });
  93 host_room.route_stanza = room_route_stanza;
  94 host_room.save = room_save;
  95
  96 local function get_disco_info(stanza)
  97         return st.iq({type='result', id=stanza.attr.id, from=muc_host, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#info")
  98                 :tag("identity", {category='conference', type='text', name=muc_name}):up()
  99                 :tag("feature", {var="http://jabber.org/protocol/muc"}); -- TODO cache disco reply
 100 end
 101 local function get_disco_items(stanza)
 102         local reply = st.iq({type='result', id=stanza.attr.id, from=muc_host, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#items");
 103         for jid, room in pairs(rooms) do
 104                 if not room:is_hidden() then
 105                         reply:tag("item", {jid=jid, name=room:get_name()}):up();
 106                 end
 107         end
 108         return reply; -- TODO cache disco reply
 109 end
 110
 111 local function handle_to_domain(event)
 112         local origin, stanza = event.origin, event.stanza;
 113         local type = stanza.attr.type;
 114         if type == "error" or type == "result" then return; end
 115         if stanza.name == "iq" and type == "get" then
 116                 local xmlns = stanza.tags[1].attr.xmlns;
 117                 if xmlns == "http://jabber.org/protocol/disco#info" then
 118                         origin.send(get_disco_info(stanza));
 119                 elseif xmlns == "http://jabber.org/protocol/disco#items" then
 120                         origin.send(get_disco_items(stanza));
 121                 elseif xmlns == "http://jabber.org/protocol/muc#unique" then
 122                         origin.send(st.reply(stanza):tag("unique", {xmlns = xmlns}):text(uuid_gen())); -- FIXME Random UUIDs can theoretically have collisions
 123                 else
 124                         origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- TODO disco/etc
 125                 end
 126         else
 127                 host_room:handle_stanza(origin, stanza);
 128                 --origin.send(st.error_reply(stanza, "cancel", "service-unavailable", "The muc server doesn't deal with messages and presence directed at it"));
 129         end
 130         return true;
 131 end
 132
 133 function stanza_handler(event)
 134         local origin, stanza = event.origin, event.stanza;
 135         local bare = jid_bare(stanza.attr.to);
 136         local room = rooms[bare];
 137         if not room then
 138                 if stanza.name ~= "presence" then
 139                         origin.send(st.error_reply(stanza, "cancel", "item-not-found"));
 140                         return true;
 141                 end
 142                 if not(restrict_room_creation) or
 143                   (restrict_room_creation == "admin" and is_admin(stanza.attr.from)) or
 144                   (restrict_room_creation == "local" and select(2, jid_split(stanza.attr.from)) == module.host:gsub("^[^%.]+%.", "")) then
 145                         room = muc_new_room(bare, {
 146                                 max_history_length = max_history_messages;
 147                         });
 148                         room.route_stanza = room_route_stanza;
 149                         room.save = room_save;
 150                         rooms[bare] = room;
 151                 end
 152         end
 153         if room then
 154                 room:handle_stanza(origin, stanza);
 155                 if not next(room._occupants) and not persistent_rooms[room.jid] then -- empty, non-persistent room
 156                         rooms[bare] = nil; -- discard room
 157                 end
 158         else
 159                 origin.send(st.error_reply(stanza, "cancel", "not-allowed"));
 160         end
 161         return true;
 162 end
 163 module:hook("iq/bare", stanza_handler, -1);
 164 module:hook("message/bare", stanza_handler, -1);
 165 module:hook("presence/bare", stanza_handler, -1);
 166 module:hook("iq/full", stanza_handler, -1);
 167 module:hook("message/full", stanza_handler, -1);
 168 module:hook("presence/full", stanza_handler, -1);
 169 module:hook("iq/host", handle_to_domain, -1);
 170 module:hook("message/host", handle_to_domain, -1);
 171 module:hook("presence/host", handle_to_domain, -1);
 172
 173 hosts[module.host].send = function(stanza) -- FIXME do a generic fix
 174         if stanza.attr.type == "result" or stanza.attr.type == "error" then
 175                 module:send(stanza);
 176         else error("component.send only supports result and error stanzas at the moment"); end
 177 end
 178
 179 hosts[module:get_host()].muc = { rooms = rooms };
 180
 181 module.save = function()
 182         return {rooms = rooms};
 183 end
 184 module.restore = function(data)
 185         for jid, oldroom in pairs(data.rooms or {}) do
 186                 local room = muc_new_room(jid);
 187                 room._jid_nick = oldroom._jid_nick;
 188                 room._occupants = oldroom._occupants;
 189                 room._data = oldroom._data;
 190                 room._affiliations = oldroom._affiliations;
 191                 room.route_stanza = room_route_stanza;
 192                 room.save = room_save;
 193                 rooms[jid] = room;
 194         end
 195         hosts[module:get_host()].muc = { rooms = rooms };
 196 end