plugins/muc/muc.lib.lua

   1 -- Prosody IM
   2 -- Copyright (C) 2008-2010 Matthew Wild
   3 -- Copyright (C) 2008-2010 Waqas Hussain
   4 -- Copyright (C) 2014 Daurnimator
   5 --
   6 -- This project is MIT/X11 licensed. Please see the
   7 -- COPYING file in the source package for more information.
   8 --
   9
  10 local select = select;
  11 local pairs, ipairs = pairs, ipairs;
  12 local next = next;
  13 local setmetatable = setmetatable;
  14
  15 local dataform = require "util.dataforms";
  16 local iterators = require "util.iterators";
  17 local jid_split = require "util.jid".split;
  18 local jid_bare = require "util.jid".bare;
  19 local jid_prep = require "util.jid".prep;
  20 local st = require "util.stanza";
  21 local log = require "util.logger".init("mod_muc");
  22 local base64 = require "util.encodings".base64;
  23 local md5 = require "util.hashes".md5;
  24
  25 local occupant_lib = module:require "muc/occupant"
  26 local muc_util = module:require "muc/util";
  27 local is_kickable_error = muc_util.is_kickable_error;
  28 local valid_roles, valid_affiliations = muc_util.valid_roles, muc_util.valid_affiliations;
  29
  30 local room_mt = {};
  31 room_mt.__index = room_mt;
  32
  33 function room_mt:__tostring()
  34         return "MUC room ("..self.jid..")";
  35 end
  36
  37 function room_mt:get_occupant_jid(real_jid)
  38         return self._jid_nick[real_jid]
  39 end
  40
  41 function room_mt:get_default_role(affiliation)
  42         local role = module:fire_event("muc-get-default-role", {
  43                 room = self;
  44                 affiliation = affiliation;
  45                 affiliation_rank = valid_affiliations[affiliation or "none"];
  46         });
  47         return role, valid_roles[role or "none"];
  48 end
  49 module:hook("muc-get-default-role", function(event)
  50         if event.affiliation_rank >= valid_affiliations.admin then
  51                 return "moderator";
  52         elseif event.affiliation_rank >= valid_affiliations.none then
  53                 return "participant";
  54         end
  55 end);
  56
  57 --- Occupant functions
  58 function room_mt:new_occupant(bare_real_jid, nick)
  59         local occupant = occupant_lib.new(bare_real_jid, nick);
  60         local affiliation = self:get_affiliation(bare_real_jid);
  61         occupant.role = self:get_default_role(affiliation);
  62         return occupant;
  63 end
  64
  65 function room_mt:get_occupant_by_nick(nick)
  66         local occupant = self._occupants[nick];
  67         if occupant == nil then return nil end
  68         return occupant_lib.copy(occupant);
  69 end
  70
  71 do
  72         local function next_copied_occupant(occupants, occupant_jid)
  73                 local next_occupant_jid, raw_occupant = next(occupants, occupant_jid);
  74                 if next_occupant_jid == nil then return nil end
  75                 return next_occupant_jid, occupant_lib.copy(raw_occupant);
  76         end
  77         function room_mt:each_occupant(read_only)
  78                 return next_copied_occupant, self._occupants, nil;
  79         end
  80 end
  81
  82 function room_mt:has_occupant()
  83         return next(self._occupants, nil) ~= nil
  84 end
  85
  86 function room_mt:get_occupant_by_real_jid(real_jid)
  87         local occupant_jid = self:get_occupant_jid(real_jid);
  88         if occupant_jid == nil then return nil end
  89         return self:get_occupant_by_nick(occupant_jid);
  90 end
  91
  92 function room_mt:save_occupant(occupant)
  93         occupant = occupant_lib.copy(occupant); -- So that occupant can be modified more
  94         local id = occupant.nick
  95
  96         -- Need to maintain _jid_nick secondary index
  97         local old_occupant = self._occupants[id];
  98         if old_occupant then
  99                 for real_jid in pairs(old_occupant.sessions) do
 100                         self._jid_nick[real_jid] = nil;
 101                 end
 102         end
 103
 104         local has_live_session = false
 105         if occupant.role ~= nil then
 106                 for real_jid, presence in occupant:each_session() do
 107                         if presence.attr.type == nil then
 108                                 has_live_session = true
 109                                 self._jid_nick[real_jid] = occupant.nick;
 110                         end
 111                 end
 112                 if not has_live_session then
 113                         -- Has no live sessions left; they have left the room.
 114                         occupant.role = nil
 115                 end
 116         end
 117         if not has_live_session then
 118                 occupant = nil
 119         end
 120         self._occupants[id] = occupant
 121 end
 122
 123 function room_mt:route_to_occupant(occupant, stanza)
 124         local to = stanza.attr.to;
 125         for jid, pr in occupant:each_session() do
 126                 stanza.attr.to = jid;
 127                 self:route_stanza(stanza);
 128         end
 129         stanza.attr.to = to;
 130 end
 131
 132 -- actor is the attribute table
 133 local function add_item(x, affiliation, role, jid, nick, actor, reason)
 134         x:tag("item", {affiliation = affiliation; role = role; jid = jid; nick = nick;})
 135         if actor then
 136                 x:tag("actor", actor):up()
 137         end
 138         if reason then
 139                 x:tag("reason"):text(reason):up()
 140         end
 141         x:up();
 142         return x
 143 end
 144
 145 -- actor is (real) jid
 146 function room_mt:build_item_list(occupant, x, is_anonymous, nick, actor, reason)
 147         local affiliation = self:get_affiliation(occupant.bare_jid) or "none";
 148         local role = occupant.role or "none";
 149         local actor_attr;
 150         if actor then
 151                 actor_attr = {nick = select(3,jid_split(self:get_occupant_jid(actor)))};
 152         end
 153         if is_anonymous then
 154                 add_item(x, affiliation, role, nil, nick, actor_attr, reason);
 155         else
 156                 if actor_attr then
 157                         actor_attr.jid = actor;
 158                 end
 159                 for real_jid, session in occupant:each_session() do
 160                         add_item(x, affiliation, role, real_jid, nick, actor_attr, reason);
 161                 end
 162         end
 163         return x
 164 end
 165
 166 function room_mt:broadcast_message(stanza)
 167         module:fire_event("muc-broadcast-message", {room = self, stanza = stanza});
 168         self:broadcast(stanza);
 169 end
 170
 171 -- Broadcast a stanza to all occupants in the room.
 172 -- optionally checks conditional called with (nick, occupant)
 173 function room_mt:broadcast(stanza, cond_func)
 174         for nick, occupant in self:each_occupant() do
 175                 if cond_func == nil or cond_func(nick, occupant) then
 176                         self:route_to_occupant(occupant, stanza)
 177                 end
 178         end
 179 end
 180
 181 local function can_see_real_jids(whois, occupant)
 182         if whois == "anyone" then
 183                 return true;
 184         elseif whois == "moderators" then
 185                 return valid_roles[occupant.role or "none"] >= valid_roles.moderator;
 186         end
 187 end
 188
 189 -- Broadcasts an occupant's presence to the whole room
 190 -- Takes the x element that goes into the stanzas
 191 function room_mt:publicise_occupant_status(occupant, base_x, nick, actor, reason)
 192         -- Build real jid and (optionally) occupant jid template presences
 193         local base_presence;
 194         if occupant.role ~= nil then
 195                 -- Try to use main jid's presence
 196                 local pr = occupant:get_presence();
 197                 if pr ~= nil then
 198                         base_presence = st.clone(pr);
 199                 end
 200         end
 201         base_presence = base_presence or st.presence {from = occupant.nick; type = "unavailable";};
 202
 203         -- Fire event (before full_p and anon_p are created)
 204         module:fire_event("muc-broadcast-presence", {
 205                 room = self; stanza = base_presence; x = base_x;
 206                 occupant = occupant; nick = nick; actor = actor;
 207                 reason = reason;
 208         });
 209
 210         local function get_presence(is_anonymous)
 211                 local x = st.clone(base_x);
 212                 self:build_item_list(occupant, x, is_anonymous, nick, actor, reason);
 213                 return st.clone(base_presence):add_child(x), x;
 214         end
 215
 216         local full_p, full_x = get_presence(false);
 217
 218         -- Create anon_p lazily
 219         local anon_p, anon_x;
 220         local function get_anon_p()
 221                 if anon_p == nil then
 222                         anon_p, anon_x = get_presence(true);
 223                 end
 224                 return anon_p, anon_x;
 225         end
 226
 227         local whois = self:get_whois();
 228
 229         -- General populance
 230         for nick, n_occupant in self:each_occupant() do
 231                 if nick ~= occupant.nick then
 232                         local pr;
 233                         if can_see_real_jids(whois, n_occupant) or occupant.bare_jid == n_occupant.bare_jid then
 234                                 pr = full_p;
 235                         else
 236                                 pr = get_anon_p();
 237                         end
 238                         self:route_to_occupant(n_occupant, pr);
 239                 end
 240         end
 241
 242         -- Presences for occupant itself
 243         full_x:tag("status", {code = "110";}):up();
 244         if occupant.role == nil then
 245                 -- They get an unavailable
 246                 self:route_to_occupant(occupant, full_p);
 247         else
 248                 -- use their own presences as templates
 249                 for full_jid, pr in occupant:each_session() do
 250                         pr = st.clone(pr);
 251                         pr.attr.to = full_jid;
 252                         -- You can always see your own full jids
 253                         pr:add_child(full_x);
 254                         self:route_stanza(pr);
 255                 end
 256         end
 257 end
 258
 259 function room_mt:send_occupant_list(to, filter)
 260         local to_bare = jid_bare(to);
 261         local is_anonymous = false;
 262         local whois = self:get_whois();
 263         if whois ~= "anyone" then
 264                 local affiliation = self:get_affiliation(to);
 265                 if affiliation ~= "admin" and affiliation ~= "owner" then
 266                         local occupant = self:get_occupant_by_real_jid(to);
 267                         if not (occupant and can_see_real_jids(whois, occupant)) then
 268                                 is_anonymous = true;
 269                         end
 270                 end
 271         end
 272         for occupant_jid, occupant in self:each_occupant() do
 273                 if filter == nil or filter(occupant_jid, occupant) then
 274                         local x = st.stanza("x", {xmlns='http://jabber.org/protocol/muc#user'});
 275                         self:build_item_list(occupant, x, is_anonymous and to_bare ~= occupant.bare_jid); -- can always see your own jids
 276                         local pres = st.clone(occupant:get_presence());
 277                         pres.attr.to = to;
 278                         pres:add_child(x);
 279                         self:route_stanza(pres);
 280                 end
 281         end
 282 end
 283
 284 function room_mt:get_disco_info(stanza)
 285         local reply = st.reply(stanza):query("http://jabber.org/protocol/disco#info");
 286         local form = dataform.new {
 287                 { name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/muc#roominfo" };
 288         };
 289         module:fire_event("muc-disco#info", {room = self; reply = reply; form = form;});
 290         reply:add_child(form:form(nil, "result"));
 291         return reply;
 292 end
 293 module:hook("muc-disco#info", function(event)
 294         event.reply:tag("feature", {var = "http://jabber.org/protocol/muc"}):up();
 295 end);
 296 module:hook("muc-disco#info", function(event)
 297         local count = iterators.count(event.room:each_occupant());
 298         table.insert(event.form, { name = "muc#roominfo_occupants", label = "Number of occupants", value = tostring(count) });
 299 end);
 300
 301 function room_mt:get_disco_items(stanza)
 302         local reply = st.reply(stanza):query("http://jabber.org/protocol/disco#items");
 303         for room_jid in self:each_occupant() do
 304                 reply:tag("item", {jid = room_jid, name = room_jid:match("/(.*)")}):up();
 305         end
 306         return reply;
 307 end
 308
 309 function room_mt:handle_kickable(origin, stanza)
 310         local real_jid = stanza.attr.from;
 311         local occupant = self:get_occupant_by_real_jid(real_jid);
 312         if occupant == nil then return nil; end
 313         local type, condition, text = stanza:get_error();
 314         local error_message = "Kicked: "..(condition and condition:gsub("%-", " ") or "presence error");
 315         if text then
 316                 error_message = error_message..": "..text;
 317         end
 318         occupant:set_session(real_jid, st.presence({type="unavailable"})
 319                 :tag('status'):text(error_message));
 320         self:save_occupant(occupant);
 321         local x = st.stanza("x", {xmlns = "http://jabber.org/protocol/muc#user";})
 322                 :tag("status", {code = "307"})
 323         self:publicise_occupant_status(occupant, x);
 324         return true;
 325 end
 326
 327 -- Give the room creator owner affiliation
 328 module:hook("muc-room-pre-create", function(event)
 329         event.room:set_affiliation(true, jid_bare(event.stanza.attr.from), "owner");
 330 end, -1);
 331
 332 -- check if user is banned
 333 module:hook("muc-occupant-pre-join", function(event)
 334         local room, stanza = event.room, event.stanza;
 335         local affiliation = room:get_affiliation(stanza.attr.from);
 336         if affiliation == "outcast" then
 337                 local reply = st.error_reply(stanza, "auth", "forbidden"):up();
 338                 reply.tags[1].attr.code = "403";
 339                 event.origin.send(reply:tag("x", {xmlns = "http://jabber.org/protocol/muc"}));
 340                 return true;
 341         end
 342 end, -10);
 343
 344 function room_mt:handle_presence_to_occupant(origin, stanza)
 345         local type = stanza.attr.type;
 346         if type == "error" then -- error, kick em out!
 347                 return self:handle_kickable(origin, stanza)
 348         elseif type == nil or type == "unavailable" then
 349                 local real_jid = stanza.attr.from;
 350                 local bare_jid = jid_bare(real_jid);
 351                 local orig_occupant, dest_occupant;
 352                 local is_new_room = next(self._affiliations) == nil;
 353                 if is_new_room then
 354                         if type == "unavailable" then return true; end -- Unavailable from someone not in the room
 355                         if module:fire_event("muc-room-pre-create", {
 356                                         room = self;
 357                                         origin = origin;
 358                                         stanza = stanza;
 359                                 }) then return true; end
 360                 else
 361                         orig_occupant = self:get_occupant_by_real_jid(real_jid);
 362                         if type == "unavailable" and orig_occupant == nil then return true; end -- Unavailable from someone not in the room
 363                 end
 364                 local is_first_dest_session;
 365                 if type == "unavailable" then
 366                         -- dest_occupant = nil
 367                 elseif orig_occupant and orig_occupant.nick == stanza.attr.to then -- Just a presence update
 368                         log("debug", "presence update for %s from session %s", orig_occupant.nick, real_jid);
 369                         dest_occupant = orig_occupant;
 370                 else
 371                         local dest_jid = stanza.attr.to;
 372                         dest_occupant = self:get_occupant_by_nick(dest_jid);
 373                         if dest_occupant == nil then
 374                                 log("debug", "no occupant found for %s; creating new occupant object for %s", dest_jid, real_jid);
 375                                 is_first_dest_session = true;
 376                                 dest_occupant = self:new_occupant(bare_jid, dest_jid);
 377                         else
 378                                 is_first_dest_session = false;
 379                         end
 380                 end
 381                 local is_last_orig_session;
 382                 if orig_occupant ~= nil then
 383                         -- Is there are least 2 sessions?
 384                         local iter, ob, last = orig_occupant:each_session();
 385                         is_last_orig_session = iter(ob, iter(ob, last)) == nil;
 386                 end
 387
 388                 local event, event_name = {
 389                         room = self;
 390                         origin = origin;
 391                         stanza = stanza;
 392                         is_first_session = is_first_dest_session;
 393                         is_last_session = is_last_orig_session;
 394                 };
 395                 if orig_occupant == nil then
 396                         event_name = "muc-occupant-pre-join";
 397                         event.is_new_room = is_new_room;
 398                 elseif dest_occupant == nil then
 399                         event_name = "muc-occupant-pre-leave";
 400                 else
 401                         event_name = "muc-occupant-pre-change";
 402                 end
 403                 if module:fire_event(event_name, event) then return true; end
 404
 405                 -- Check for nick conflicts
 406                 if dest_occupant ~= nil and not is_first_dest_session and bare_jid ~= jid_bare(dest_occupant.bare_jid) then -- new nick or has different bare real jid
 407                         log("debug", "%s couldn't join due to nick conflict: %s", real_jid, dest_occupant.nick);
 408                         local reply = st.error_reply(stanza, "cancel", "conflict"):up();
 409                         reply.tags[1].attr.code = "409";
 410                         origin.send(reply:tag("x", {xmlns = "http://jabber.org/protocol/muc"}));
 411                         return true;
 412                 end
 413
 414                 -- Send presence stanza about original occupant
 415                 if orig_occupant ~= nil and orig_occupant ~= dest_occupant then
 416                         local orig_x = st.stanza("x", {xmlns = "http://jabber.org/protocol/muc#user";});
 417                         local dest_nick;
 418                         if dest_occupant == nil then -- Session is leaving
 419                                 log("debug", "session %s is leaving occupant %s", real_jid, orig_occupant.nick);
 420                                 if is_last_orig_session then
 421                                         orig_occupant.role = nil;
 422                                 end
 423                                 orig_occupant:set_session(real_jid, stanza);
 424                         else
 425                                 log("debug", "session %s is changing from occupant %s to %s", real_jid, orig_occupant.nick, dest_occupant.nick);
 426                                 local generated_unavail = st.presence {from = orig_occupant.nick, to = real_jid, type = "unavailable"};
 427                                 orig_occupant:set_session(real_jid, generated_unavail);
 428                                 dest_nick = select(3, jid_split(dest_occupant.nick));
 429                                 if not is_first_dest_session then -- User is swapping into another pre-existing session
 430                                         log("debug", "session %s is swapping into multisession %s, showing it leave.", real_jid, dest_occupant.nick);
 431                                         -- Show the other session leaving
 432                                         local x = st.stanza("x", {xmlns = "http://jabber.org/protocol/muc#user";})
 433                                                 :tag("status"):text("you are joining pre-existing session " .. dest_nick):up();
 434                                         add_item(x, self:get_affiliation(bare_jid), "none");
 435                                         local pr = st.presence{from = dest_occupant.nick, to = real_jid, type = "unavailable"}
 436                                                 :add_child(x);
 437                                         self:route_stanza(pr);
 438                                 end
 439                                 if is_first_dest_session and is_last_orig_session then -- Normal nick change
 440                                         log("debug", "no sessions in %s left; publically marking as nick change", orig_occupant.nick);
 441                                         orig_x:tag("status", {code = "303";}):up();
 442                                 else -- The session itself always needs to see a nick change
 443                                         -- don't want to get our old nick's available presence,
 444                                         -- so remove our session from there, and manually generate an unavailable
 445                                         orig_occupant:remove_session(real_jid);
 446                                         log("debug", "generating nick change for %s", real_jid);
 447                                         local x = st.stanza("x", {xmlns = "http://jabber.org/protocol/muc#user";});
 448                                         -- self:build_item_list(orig_occupant, x, false, dest_nick); -- COMPAT: clients get confused if they see other items besides their own
 449                                         add_item(x, self:get_affiliation(bare_jid), orig_occupant.role, real_jid, dest_nick);
 450                                         x:tag("status", {code = "303";}):up();
 451                                         x:tag("status", {code = "110";}):up();
 452                                         self:route_stanza(generated_unavail:add_child(x));
 453                                         dest_nick = nil; -- set dest_nick to nil; so general populance doesn't see it for whole orig_occupant
 454                                 end
 455                         end
 456                         self:save_occupant(orig_occupant);
 457                         self:publicise_occupant_status(orig_occupant, orig_x, dest_nick);
 458
 459                         if is_last_orig_session then
 460                                 module:fire_event("muc-occupant-left", {room = self; nick = orig_occupant.nick;});
 461                         end
 462                 end
 463
 464                 if dest_occupant ~= nil then
 465                         dest_occupant:set_session(real_jid, stanza);
 466                         local dest_x = st.stanza("x", {xmlns = "http://jabber.org/protocol/muc#user";});
 467                         if is_new_room then
 468                                 dest_x:tag("status", {code = "201"}):up();
 469                         end
 470                         if orig_occupant == nil and self:get_whois() == "anyone" then
 471                                 dest_x:tag("status", {code = "100"}):up();
 472                         end
 473                         self:save_occupant(dest_occupant);
 474
 475                         if orig_occupant == nil then
 476                                 -- Send occupant list to newly joined user
 477                                 self:send_occupant_list(real_jid, function(nick, occupant)
 478                                         -- Don't include self
 479                                         return occupant:get_presence(real_jid) == nil;
 480                                 end)
 481                         end
 482                         self:publicise_occupant_status(dest_occupant, dest_x);
 483
 484                         if orig_occupant ~= nil and orig_occupant ~= dest_occupant and not is_last_orig_session then -- If user is swapping and wasn't last original session
 485                                 log("debug", "session %s split nicks; showing %s rejoining", real_jid, orig_occupant.nick);
 486                                 -- Show the original nick joining again
 487                                 local pr = st.clone(orig_occupant:get_presence());
 488                                 pr.attr.to = real_jid;
 489                                 local x = st.stanza("x", {xmlns = "http://jabber.org/protocol/muc#user";});
 490                                 self:build_item_list(orig_occupant, x, false);
 491                                 -- TODO: new status code to inform client this was the multi-session it left?
 492                                 pr:add_child(x);
 493                                 self:route_stanza(pr);
 494                         end
 495
 496                         if orig_occupant == nil then
 497                                 if is_first_dest_session then
 498                                         module:fire_event("muc-occupant-joined", {room = self; nick = dest_occupant.nick; stanza = stanza;});
 499                                 end
 500                                 module:fire_event("muc-occupant-session-new", {room = self; nick = dest_occupant.nick; stanza = stanza; jid = real_jid;});
 501                         end
 502                 end
 503         elseif type ~= 'result' then -- bad type
 504                 if type ~= 'visible' and type ~= 'invisible' then -- COMPAT ejabberd can broadcast or forward XEP-0018 presences
 505                         origin.send(st.error_reply(stanza, "modify", "bad-request")); -- FIXME correct error?
 506                 end
 507         end
 508         return true;
 509 end
 510
 511 function room_mt:handle_iq_to_occupant(origin, stanza)
 512         local from, to = stanza.attr.from, stanza.attr.to;
 513         local type = stanza.attr.type;
 514         local id = stanza.attr.id;
 515         local occupant = self:get_occupant_by_nick(to);
 516         if (type == "error" or type == "result") then
 517                 do -- deconstruct_stanza_id
 518                         if not occupant then return nil; end
 519                         local from_jid, id, to_jid_hash = (base64.decode(stanza.attr.id) or ""):match("^(.+)%z(.*)%z(.+)$");
 520                         if not(from == from_jid or from == jid_bare(from_jid)) then return nil; end
 521                         local from_occupant_jid = self:get_occupant_jid(from_jid);
 522                         if from_occupant_jid == nil then return nil; end
 523                         local session_jid
 524                         for to_jid in occupant:each_session() do
 525                                 if md5(to_jid) == to_jid_hash then
 526                                         session_jid = to_jid;
 527                                         break;
 528                                 end
 529                         end
 530                         if session_jid == nil then return nil; end
 531                         stanza.attr.from, stanza.attr.to, stanza.attr.id = from_jid, session_jid, id;
 532                 end
 533                 log("debug", "%s sent private iq stanza to %s (%s)", from, to, stanza.attr.to);
 534                 self:route_stanza(stanza);
 535                 stanza.attr.from, stanza.attr.to, stanza.attr.id = from, to, id;
 536                 return true;
 537         else -- Type is "get" or "set"
 538                 local current_nick = self:get_occupant_jid(from);
 539                 if not current_nick then
 540                         origin.send(st.error_reply(stanza, "cancel", "not-acceptable"));
 541                         return true;
 542                 end
 543                 if not occupant then -- recipient not in room
 544                         origin.send(st.error_reply(stanza, "cancel", "item-not-found", "Recipient not in room"));
 545                         return true;
 546                 end
 547                 do -- construct_stanza_id
 548                         stanza.attr.id = base64.encode(occupant.jid.."\0"..stanza.attr.id.."\0"..md5(from));
 549                 end
 550                 stanza.attr.from, stanza.attr.to = current_nick, occupant.jid;
 551                 log("debug", "%s sent private iq stanza to %s (%s)", from, to, occupant.jid);
 552                 if stanza.tags[1].attr.xmlns == 'vcard-temp' then
 553                         stanza.attr.to = jid_bare(stanza.attr.to);
 554                 end
 555                 self:route_stanza(stanza);
 556                 stanza.attr.from, stanza.attr.to, stanza.attr.id = from, to, id;
 557                 return true;
 558         end
 559 end
 560
 561 function room_mt:handle_message_to_occupant(origin, stanza)
 562         local from, to = stanza.attr.from, stanza.attr.to;
 563         local current_nick = self:get_occupant_jid(from);
 564         local type = stanza.attr.type;
 565         if not current_nick then -- not in room
 566                 if type ~= "error" then
 567                         origin.send(st.error_reply(stanza, "cancel", "not-acceptable"));
 568                 end
 569                 return true;
 570         end
 571         if type == "groupchat" then -- groupchat messages not allowed in PM
 572                 origin.send(st.error_reply(stanza, "modify", "bad-request"));
 573                 return true;
 574         elseif type == "error" and is_kickable_error(stanza) then
 575                 log("debug", "%s kicked from %s for sending an error message", current_nick, self.jid);
 576                 return self:handle_kickable(origin, stanza); -- send unavailable
 577         end
 578
 579         local o_data = self:get_occupant_by_nick(to);
 580         if not o_data then
 581                 origin.send(st.error_reply(stanza, "cancel", "item-not-found", "Recipient not in room"));
 582                 return true;
 583         end
 584         log("debug", "%s sent private message stanza to %s (%s)", from, to, o_data.jid);
 585         stanza:tag("x", { xmlns = "http://jabber.org/protocol/muc#user" }):up();
 586         stanza.attr.from = current_nick;
 587         self:route_to_occupant(o_data, stanza)
 588         -- TODO: Remove x tag?
 589         stanza.attr.from = from;
 590         return true;
 591 end
 592
 593 function room_mt:send_form(origin, stanza)
 594         origin.send(st.reply(stanza):query("http://jabber.org/protocol/muc#owner")
 595                 :add_child(self:get_form_layout(stanza.attr.from):form())
 596         );
 597 end
 598
 599 function room_mt:get_form_layout(actor)
 600         local form = dataform.new({
 601                 title = "Configuration for "..self.jid,
 602                 instructions = "Complete and submit this form to configure the room.",
 603                 {
 604                         name = 'FORM_TYPE',
 605                         type = 'hidden',
 606                         value = 'http://jabber.org/protocol/muc#roomconfig'
 607                 }
 608         });
 609         return module:fire_event("muc-config-form", { room = self, actor = actor, form = form }) or form;
 610 end
 611
 612 function room_mt:process_form(origin, stanza)
 613         local form = stanza.tags[1]:get_child("x", "jabber:x:data");
 614         if form.attr.type == "cancel" then
 615                 origin.send(st.reply(stanza));
 616         elseif form.attr.type == "submit" then
 617                 local fields = self:get_form_layout(stanza.attr.from):data(form);
 618                 if fields.FORM_TYPE ~= "http://jabber.org/protocol/muc#roomconfig" then
 619                         origin.send(st.error_reply(stanza, "cancel", "bad-request", "Form is not of type room configuration"));
 620                         return true;
 621                 end
 622
 623                 local event = {room = self; origin = origin; stanza = stanza; fields = fields; status_codes = {};};
 624                 function event.update_option(name, field, allowed)
 625                         local new = fields[field];
 626                         if new == nil then return; end
 627                         if allowed and not allowed[new] then return; end
 628                         if new == self["get_"..name](self) then return; end
 629                         event.status_codes["104"] = true;
 630                         self["set_"..name](self, new);
 631                         return true;
 632                 end
 633                 module:fire_event("muc-config-submitted", event);
 634
 635                 if self.save then self:save(true); end
 636                 origin.send(st.reply(stanza));
 637
 638                 if next(event.status_codes) then
 639                         local msg = st.message({type='groupchat', from=self.jid})
 640                                 :tag('x', {xmlns='http://jabber.org/protocol/muc#user'})
 641                         for code in pairs(event.status_codes) do
 642                                 msg:tag("status", {code = code;}):up();
 643                         end
 644                         msg:up();
 645                         self:broadcast_message(msg);
 646                 end
 647         else
 648                 origin.send(st.error_reply(stanza, "cancel", "bad-request", "Not a submitted form"));
 649         end
 650         return true;
 651 end
 652
 653 -- Removes everyone from the room
 654 function room_mt:clear(x)
 655         x = x or st.stanza("x", {xmlns='http://jabber.org/protocol/muc#user'});
 656         local occupants_updated = {};
 657         for nick, occupant in self:each_occupant() do
 658                 occupant.role = nil;
 659                 self:save_occupant(occupant);
 660                 occupants_updated[occupant] = true;
 661         end
 662         for occupant in pairs(occupants_updated) do
 663                 self:publicise_occupant_status(occupant, x);
 664                 module:fire_event("muc-occupant-left", { room = self; nick = occupant.nick; });
 665         end
 666 end
 667
 668 function room_mt:destroy(newjid, reason, password)
 669         local x = st.stanza("x", {xmlns = "http://jabber.org/protocol/muc#user"})
 670                 :tag("item", { affiliation='none', role='none' }):up()
 671                 :tag("destroy", {jid=newjid});
 672         if reason then x:tag("reason"):text(reason):up(); end
 673         if password then x:tag("password"):text(password):up(); end
 674         x:up();
 675         self:clear(x);
 676         module:fire_event("muc-room-destroyed", { room = self });
 677 end
 678
 679 function room_mt:handle_disco_info_get_query(origin, stanza)
 680         origin.send(self:get_disco_info(stanza));
 681         return true;
 682 end
 683
 684 function room_mt:handle_disco_items_get_query(origin, stanza)
 685         origin.send(self:get_disco_items(stanza));
 686         return true;
 687 end
 688
 689 function room_mt:handle_admin_query_set_command(origin, stanza)
 690         local item = stanza.tags[1].tags[1];
 691         if item.attr.jid then -- Validate provided JID
 692                 item.attr.jid = jid_prep(item.attr.jid);
 693                 if not item.attr.jid then
 694                         origin.send(st.error_reply(stanza, "modify", "jid-malformed"));
 695                         return true;
 696                 end
 697         end
 698         if not item.attr.jid and item.attr.nick then -- COMPAT Workaround for Miranda sending 'nick' instead of 'jid' when changing affiliation
 699                 local occupant = self:get_occupant_by_nick(self.jid.."/"..item.attr.nick);
 700                 if occupant then item.attr.jid = occupant.jid; end
 701         elseif not item.attr.nick and item.attr.jid then
 702                 local nick = self:get_occupant_jid(item.attr.jid);
 703                 if nick then item.attr.nick = select(3, jid_split(nick)); end
 704         end
 705         local actor = stanza.attr.from;
 706         local reason = item:get_child_text("reason");
 707         local success, errtype, err
 708         if item.attr.affiliation and item.attr.jid and not item.attr.role then
 709                 success, errtype, err = self:set_affiliation(actor, item.attr.jid, item.attr.affiliation, reason);
 710         elseif item.attr.role and item.attr.nick and not item.attr.affiliation then
 711                 success, errtype, err = self:set_role(actor, self.jid.."/"..item.attr.nick, item.attr.role, reason);
 712         else
 713                 success, errtype, err = nil, "cancel", "bad-request";
 714         end
 715         if not success then origin.send(st.error_reply(stanza, errtype, err)); end
 716         origin.send(st.reply(stanza));
 717         return true;
 718 end
 719
 720 function room_mt:handle_admin_query_get_command(origin, stanza)
 721         local actor = stanza.attr.from;
 722         local affiliation = self:get_affiliation(actor);
 723         local item = stanza.tags[1].tags[1];
 724         local _aff = item.attr.affiliation;
 725         local _rol = item.attr.role;
 726         if _aff and not _rol then
 727                 if affiliation == "owner" or (affiliation == "admin" and _aff ~= "owner" and _aff ~= "admin") then
 728                         local reply = st.reply(stanza):query("http://jabber.org/protocol/muc#admin");
 729                         for jid, affiliation in pairs(self._affiliations) do
 730                                 if affiliation == _aff then
 731                                         reply:tag("item", {affiliation = _aff, jid = jid}):up();
 732                                 end
 733                         end
 734                         origin.send(reply);
 735                         return true;
 736                 else
 737                         origin.send(st.error_reply(stanza, "auth", "forbidden"));
 738                         return true;
 739                 end
 740         elseif _rol and not _aff then
 741                 local role = self:get_role(self:get_occupant_jid(actor)) or self:get_default_role(affiliation);
 742                 if valid_roles[role or "none"] >= valid_roles.moderator then
 743                         if _rol == "none" then _rol = nil; end
 744                         local reply = st.reply(stanza):query("http://jabber.org/protocol/muc#admin");
 745                         -- TODO: whois check here? (though fully anonymous rooms are not supported)
 746                         for occupant_jid, occupant in self:each_occupant() do
 747                                 if occupant.role == _rol then
 748                                         local nick = select(3,jid_split(occupant_jid));
 749                                         self:build_item_list(occupant, reply, false, nick);
 750                                 end
 751                         end
 752                         origin.send(reply:up());
 753                         return true;
 754                 else
 755                         origin.send(st.error_reply(stanza, "auth", "forbidden"));
 756                         return true;
 757                 end
 758         else
 759                 origin.send(st.error_reply(stanza, "cancel", "bad-request"));
 760                 return true;
 761         end
 762 end
 763
 764 function room_mt:handle_owner_query_get_to_room(origin, stanza)
 765         if self:get_affiliation(stanza.attr.from) ~= "owner" then
 766                 origin.send(st.error_reply(stanza, "auth", "forbidden", "Only owners can configure rooms"));
 767                 return true;
 768         end
 769
 770         self:send_form(origin, stanza);
 771         return true;
 772 end
 773 function room_mt:handle_owner_query_set_to_room(origin, stanza)
 774         if self:get_affiliation(stanza.attr.from) ~= "owner" then
 775                 origin.send(st.error_reply(stanza, "auth", "forbidden", "Only owners can configure rooms"));
 776                 return true;
 777         end
 778
 779         local child = stanza.tags[1].tags[1];
 780         if not child then
 781                 origin.send(st.error_reply(stanza, "modify", "bad-request"));
 782                 return true;
 783         elseif child.name == "destroy" then
 784                 local newjid = child.attr.jid;
 785                 local reason = child:get_child_text("reason");
 786                 local password = child:get_child_text("password");
 787                 self:destroy(newjid, reason, password);
 788                 origin.send(st.reply(stanza));
 789                 return true;
 790         elseif child.name == "x" and child.attr.xmlns == "jabber:x:data" then
 791                 return self:process_form(origin, stanza);
 792         else
 793                 origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
 794                 return true;
 795         end
 796 end
 797
 798 function room_mt:handle_groupchat_to_room(origin, stanza)
 799         -- Prosody has made the decision that messages with <subject/> are exclusively subject changes
 800         -- e.g. body will be ignored; even if the subject change was not allowed
 801         if stanza:get_child("subject") then
 802                 return module:fire_event("muc-subject-change", {room = self, origin = origin, stanza = stanza});
 803         end
 804         local from = stanza.attr.from;
 805         local occupant = self:get_occupant_by_real_jid(from);
 806         if not occupant then -- not in room
 807                 origin.send(st.error_reply(stanza, "cancel", "not-acceptable"));
 808                 return true;
 809         elseif occupant.role == "visitor" then
 810                 origin.send(st.error_reply(stanza, "auth", "forbidden"));
 811                 return true;
 812         end
 813         stanza.attr.from = occupant.nick;
 814         self:broadcast_message(stanza);
 815         stanza.attr.from = from;
 816         return true;
 817 end
 818
 819 -- hack - some buggy clients send presence updates to the room rather than their nick
 820 function room_mt:handle_presence_to_room(origin, stanza)
 821         local current_nick = self:get_occupant_jid(stanza.attr.from);
 822         local handled
 823         if current_nick then
 824                 local to = stanza.attr.to;
 825                 stanza.attr.to = current_nick;
 826                 handled = self:handle_presence_to_occupant(origin, stanza);
 827                 stanza.attr.to = to;
 828         end
 829         return handled;
 830 end
 831
 832 -- Need visitor role or higher to invite
 833 module:hook("muc-pre-invite", function(event)
 834         local room, stanza = event.room, event.stanza;
 835         local _from, _to = stanza.attr.from, stanza.attr.to;
 836         local inviter = room:get_occupant_by_real_jid(_from);
 837         local role = inviter and inviter.role or room:get_default_role(room:get_affiliation(_from));
 838         if valid_roles[role or "none"] <= valid_roles.visitor then
 839                 event.origin.send(st.error_reply(stanza, "auth", "forbidden"));
 840                 return true;
 841         end
 842 end);
 843
 844 function room_mt:handle_mediated_invite(origin, stanza)
 845         local payload = stanza:get_child("x", "http://jabber.org/protocol/muc#user"):get_child("invite");
 846         local invitee = jid_prep(payload.attr.to);
 847         if not invitee then
 848                 origin.send(st.error_reply(stanza, "cancel", "jid-malformed"));
 849                 return true;
 850         elseif module:fire_event("muc-pre-invite", {room = self, origin = origin, stanza = stanza}) then
 851                 return true;
 852         end
 853         local invite = muc_util.filter_muc_x(st.clone(stanza));
 854         invite.attr.from = self.jid;
 855         invite.attr.to = invitee;
 856         invite:tag('x', {xmlns='http://jabber.org/protocol/muc#user'})
 857                         :tag('invite', {from = stanza.attr.from;})
 858                                 :tag('reason'):text(payload:get_child_text("reason")):up()
 859                         :up()
 860                 :up();
 861         if not module:fire_event("muc-invite", {room = self, stanza = invite, origin = origin, incoming = stanza}) then
 862                 self:route_stanza(invite);
 863         end
 864         return true;
 865 end
 866
 867 -- COMPAT: Some older clients expect this
 868 module:hook("muc-invite", function(event)
 869         local room, stanza = event.room, event.stanza;
 870         local invite = stanza:get_child("x", "http://jabber.org/protocol/muc#user"):get_child("invite");
 871         local reason = invite:get_child_text("reason");
 872         stanza:tag('x', {xmlns = "jabber:x:conference"; jid = room.jid;})
 873                 :text(reason or "")
 874         :up();
 875 end);
 876
 877 -- Add a plain message for clients which don't support invites
 878 module:hook("muc-invite", function(event)
 879         local room, stanza = event.room, event.stanza;
 880         if not stanza:get_child("body") then
 881                 local invite = stanza:get_child("x", "http://jabber.org/protocol/muc#user"):get_child("invite");
 882                 local reason = invite:get_child_text("reason") or "";
 883                 stanza:tag("body")
 884                         :text(invite.attr.from.." invited you to the room "..room.jid..(reason == "" and (" ("..reason..")") or ""))
 885                 :up();
 886         end
 887 end);
 888
 889 function room_mt:handle_mediated_decline(origin, stanza)
 890         local payload = stanza:get_child("x", "http://jabber.org/protocol/muc#user"):get_child("decline");
 891         local declinee = jid_prep(payload.attr.to);
 892         if not declinee then
 893                 origin.send(st.error_reply(stanza, "cancel", "jid-malformed"));
 894                 return true;
 895         elseif module:fire_event("muc-pre-decline", {room = self, origin = origin, stanza = stanza}) then
 896                 return true;
 897         end
 898         local decline = muc_util.filter_muc_x(st.clone(stanza));
 899         decline.attr.from = self.jid;
 900         decline.attr.to = declinee;
 901         decline:tag("x", {xmlns = "http://jabber.org/protocol/muc#user"})
 902                         :tag("decline", {from = stanza.attr.from})
 903                                 :tag("reason"):text(payload:get_child_text("reason")):up()
 904                         :up()
 905                 :up();
 906         if not module:fire_event("muc-decline", {room = self, stanza = decline, origin = origin, incoming = stanza}) then
 907                 local declinee = decline.attr.to; -- re-fetch, in case event modified it
 908                 local occupant
 909                 if jid_bare(declinee) == self.jid then -- declinee jid is already an in-room jid
 910                         occupant = self:get_occupant_by_nick(declinee);
 911                 end
 912                 if occupant then
 913                         self:route_to_occupant(occupant, decline);
 914                 else
 915                         self:route_stanza(decline);
 916                 end
 917         end
 918         return true;
 919 end
 920
 921 -- Add a plain message for clients which don't support declines
 922 module:hook("muc-decline", function(event)
 923         local room, stanza = event.room, event.stanza;
 924         if not stanza:get_child("body") then
 925                 local decline = stanza:get_child("x", "http://jabber.org/protocol/muc#user"):get_child("decline");
 926                 local reason = decline:get_child_text("reason") or "";
 927                 stanza:tag("body")
 928                         :text(decline.attr.from.." declined your invite to the room "..room.jid..(reason == "" and (" ("..reason..")") or ""))
 929                 :up();
 930         end
 931 end);
 932
 933 function room_mt:handle_message_to_room(origin, stanza)
 934         local type = stanza.attr.type;
 935         if type == "groupchat" then
 936                 return self:handle_groupchat_to_room(origin, stanza)
 937         elseif type == "error" and is_kickable_error(stanza) then
 938                 return self:handle_kickable(origin, stanza)
 939         elseif type == nil then
 940                 local x = stanza:get_child("x", "http://jabber.org/protocol/muc#user");
 941                 if x then
 942                         local payload = x.tags[1];
 943                         if payload == nil then
 944                                 -- fallthrough
 945                         elseif payload.name == "invite" and payload.attr.to then
 946                                 return self:handle_mediated_invite(origin, stanza)
 947                         elseif payload.name == "decline" and payload.attr.to then
 948                                 return self:handle_mediated_decline(origin, stanza)
 949                         end
 950                         origin.send(st.error_reply(stanza, "cancel", "bad-request"));
 951                         return true;
 952                 end
 953         end
 954 end
 955
 956 function room_mt:route_stanza(stanza)
 957         module:send(stanza);
 958 end
 959
 960 function room_mt:get_affiliation(jid)
 961         local node, host, resource = jid_split(jid);
 962         local bare = node and node.."@"..host or host;
 963         local result = self._affiliations[bare]; -- Affiliations are granted, revoked, and maintained based on the user's bare JID.
 964         if not result and self._affiliations[host] == "outcast" then result = "outcast"; end -- host banned
 965         return result;
 966 end
 967
 968 function room_mt:set_affiliation(actor, jid, affiliation, reason)
 969         if not actor then return nil, "modify", "not-acceptable"; end;
 970
 971         jid = jid_bare(jid);
 972
 973         if valid_affiliations[affiliation or "none"] == nil then
 974                 return nil, "modify", "not-acceptable";
 975         end
 976         affiliation = affiliation ~= "none" and affiliation or nil; -- coerces `affiliation == false` to `nil`
 977
 978         local target_affiliation = self._affiliations[jid]; -- Raw; don't want to check against host
 979         local is_downgrade = valid_affiliations[target_affiliation or "none"] > valid_affiliations[affiliation or "none"];
 980
 981         if actor ~= true then
 982                 local actor_bare = jid_bare(actor);
 983                 local actor_affiliation = self._affiliations[actor_bare];
 984                 if actor_affiliation == "owner" then
 985                         if actor_bare == jid then -- self change
 986                                 -- need at least one owner
 987                                 local is_last = true;
 988                                 for j, aff in pairs(self._affiliations) do if j ~= jid and aff == "owner" then is_last = false; break; end end
 989                                 if is_last then
 990                                         return nil, "cancel", "conflict";
 991                                 end
 992                         end
 993                         -- owners can do anything else
 994                 elseif affiliation == "owner" or affiliation == "admin"
 995                         or actor_affiliation ~= "admin"
 996                         or target_affiliation == "owner" or target_affiliation == "admin" then
 997                         -- Can't demote owners or other admins
 998                         return nil, "cancel", "not-allowed";
 999                 end
1000         end
1001
1002         -- Set in 'database'
1003         self._affiliations[jid] = affiliation;
1004
1005         -- Update roles
1006         local role = self:get_default_role(affiliation);
1007         local role_rank = valid_roles[role or "none"];
1008         local occupants_updated = {}; -- Filled with old roles
1009         for nick, occupant in self:each_occupant() do
1010                 if occupant.bare_jid == jid then
1011                         -- need to publcize in all cases; as affiliation in <item/> has changed.
1012                         occupants_updated[occupant] = occupant.role;
1013                         if occupant.role ~= role and (
1014                                 is_downgrade or
1015                                 valid_roles[occupant.role or "none"] < role_rank -- upgrade
1016                         ) then
1017                                 occupant.role = role;
1018                                 self:save_occupant(occupant);
1019                         end
1020                 end
1021         end
1022
1023         -- Tell the room of the new occupant affiliations+roles
1024         local x = st.stanza("x", {xmlns = "http://jabber.org/protocol/muc#user"});
1025         if not role then -- getting kicked
1026                 if affiliation == "outcast" then
1027                         x:tag("status", {code="301"}):up(); -- banned
1028                 else
1029                         x:tag("status", {code="321"}):up(); -- affiliation change
1030                 end
1031         end
1032         local is_semi_anonymous = self:get_whois() == "moderators";
1033         for occupant, old_role in pairs(occupants_updated) do
1034                 self:publicise_occupant_status(occupant, x, nil, actor, reason);
1035                 if is_semi_anonymous and
1036                         (old_role == "moderator" and occupant.role ~= "moderator") or
1037                         (old_role ~= "moderator" and occupant.role == "moderator") then -- Has gained or lost moderator status
1038                         -- Send everyone else's presences (as jid visibility has changed)
1039                         for real_jid in occupant:each_session() do
1040                                 self:send_occupant_list(real_jid, function(occupant_jid, occupant)
1041                                         return occupant.bare_jid ~= jid;
1042                                 end);
1043                         end
1044                 end
1045         end
1046
1047         if self.save then self:save(); end
1048         return true;
1049 end
1050
1051 function room_mt:get_role(nick)
1052         local occupant = self:get_occupant_by_nick(nick);
1053         return occupant and occupant.role or nil;
1054 end
1055
1056 function room_mt:set_role(actor, occupant_jid, role, reason)
1057         if not actor then return nil, "modify", "not-acceptable"; end
1058
1059         local occupant = self:get_occupant_by_nick(occupant_jid);
1060         if not occupant then return nil, "modify", "not-acceptable"; end
1061
1062         if valid_roles[role or "none"] == nil then
1063                 return nil, "modify", "not-acceptable";
1064         end
1065         role = role ~= "none" and role or nil; -- coerces `role == false` to `nil`
1066
1067         if actor ~= true then
1068                 -- Can't do anything to other owners or admins
1069                 local occupant_affiliation = self:get_affiliation(occupant.bare_jid);
1070                 if occupant_affiliation == "owner" and occupant_affiliation == "admin" then
1071                         return nil, "cancel", "not-allowed";
1072                 end
1073
1074                 -- If you are trying to give or take moderator role you need to be an owner or admin
1075                 if occupant.role == "moderator" or role == "moderator" then
1076                         local actor_affiliation = self:get_affiliation(actor);
1077                         if actor_affiliation ~= "owner" and actor_affiliation ~= "admin" then
1078                                 return nil, "cancel", "not-allowed";
1079                         end
1080                 end
1081
1082                 -- Need to be in the room and a moderator
1083                 local actor_occupant = self:get_occupant_by_real_jid(actor);
1084                 if not actor_occupant or actor_occupant.role ~= "moderator" then
1085                         return nil, "cancel", "not-allowed";
1086                 end
1087         end
1088
1089         local x = st.stanza("x", {xmlns = "http://jabber.org/protocol/muc#user"});
1090         if not role then
1091                 x:tag("status", {code = "307"}):up();
1092         end
1093         occupant.role = role;
1094         self:save_occupant(occupant);
1095         self:publicise_occupant_status(occupant, x, nil, actor, reason);
1096         return true;
1097 end
1098
1099 local name = module:require "muc/name";
1100 room_mt.get_name = name.get;
1101 room_mt.set_name = name.set;
1102
1103 local description = module:require "muc/description";
1104 room_mt.get_description = description.get;
1105 room_mt.set_description = description.set;
1106
1107 local hidden = module:require "muc/hidden";
1108 room_mt.get_hidden = hidden.get;
1109 room_mt.set_hidden = hidden.set;
1110 function room_mt:get_public()
1111         return not self:get_hidden();
1112 end
1113 function room_mt:set_public(public)
1114         return self:set_hidden(not public);
1115 end
1116
1117 local password = module:require "muc/password";
1118 room_mt.get_password = password.get;
1119 room_mt.set_password = password.set;
1120
1121 local whois = module:require "muc/whois";
1122 room_mt.get_whois = whois.get;
1123 room_mt.set_whois = whois.set;
1124
1125 local members_only = module:require "muc/members_only";
1126 room_mt.get_members_only = members_only.get;
1127 room_mt.set_members_only = members_only.set;
1128
1129 local moderated = module:require "muc/moderated";
1130 room_mt.get_moderated = moderated.get;
1131 room_mt.set_moderated = moderated.set;
1132
1133 local persistent = module:require "muc/persistent";
1134 room_mt.get_persistent = persistent.get;
1135 room_mt.set_persistent = persistent.set;
1136
1137 local subject = module:require "muc/subject";
1138 room_mt.get_changesubject = subject.get_changesubject;
1139 room_mt.set_changesubject = subject.set_changesubject;
1140 room_mt.get_subject = subject.get;
1141 room_mt.set_subject = subject.set;
1142 room_mt.send_subject = subject.send;
1143
1144 local history = module:require "muc/history";
1145 room_mt.send_history = history.send;
1146 room_mt.get_historylength = history.get_length;
1147 room_mt.set_historylength = history.set_length;
1148
1149 local _M = {}; -- module "muc"
1150
1151 function _M.new_room(jid, config)
1152         return setmetatable({
1153                 jid = jid;
1154                 _jid_nick = {};
1155                 _occupants = {};
1156                 _data = {
1157                 };
1158                 _affiliations = {};
1159         }, room_mt);
1160 end
1161
1162 _M.room_mt = room_mt;
1163
1164 return _M;