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prosody/plugins/muc/muc.lib.lua
Matthew Wild 2bc0606453 Update copyright headers for 2010
2010-03-22 17:06:15 +00:00

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-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
local datamanager = require "util.datamanager";
local datetime = require "util.datetime";
local jid_split = require "util.jid".split;
local jid_bare = require "util.jid".bare;
local jid_prep = require "util.jid".prep;
local st = require "util.stanza";
local log = require "util.logger".init("mod_muc");
local multitable_new = require "util.multitable".new;
local t_insert, t_remove = table.insert, table.remove;
local setmetatable = setmetatable;
local base64 = require "util.encodings".base64;
local md5 = require "util.hashes".md5;
local muc_domain = nil; --module:get_host();
local history_length = 20;
------------
local function filter_xmlns_from_array(array, filters)
local count = 0;
for i=#array,1,-1 do
local attr = array[i].attr;
if filters[attr and attr.xmlns] then
t_remove(array, i);
count = count + 1;
end
end
return count;
end
local function filter_xmlns_from_stanza(stanza, filters)
if filters then
if filter_xmlns_from_array(stanza.tags, filters) ~= 0 then
return stanza, filter_xmlns_from_array(stanza, filters);
end
end
return stanza, 0;
end
local presence_filters = {["http://jabber.org/protocol/muc"]=true;["http://jabber.org/protocol/muc#user"]=true};
local function get_filtered_presence(stanza)
return filter_xmlns_from_stanza(st.clone(stanza):reset(), presence_filters);
end
local kickable_error_conditions = {
["gone"] = true;
["internal-server-error"] = true;
["item-not-found"] = true;
["jid-malformed"] = true;
["recipient-unavailable"] = true;
["redirect"] = true;
["remote-server-not-found"] = true;
["remote-server-timeout"] = true;
["service-unavailable"] = true;
["malformed error"] = true;
};
local function get_error_condition(stanza)
for _, tag in ipairs(stanza.tags) do
if tag.name == "error" and (not(tag.attr.xmlns) or tag.attr.xmlns == "jabber:client") then
for _, cond in ipairs(tag.tags) do
if cond.attr.xmlns == "urn:ietf:params:xml:ns:xmpp-stanzas" then
return cond.name;
end
end
return "malformed error";
end
end
return "malformed error";
end
local function is_kickable_error(stanza)
local cond = get_error_condition(stanza);
return kickable_error_conditions[cond] and cond;
end
local function getUsingPath(stanza, path, getText)
local tag = stanza;
for _, name in ipairs(path) do
if type(tag) ~= 'table' then return; end
tag = tag:child_with_name(name);
end
if tag and getText then tag = table.concat(tag); end
return tag;
end
local function getTag(stanza, path) return getUsingPath(stanza, path); end
local function getText(stanza, path) return getUsingPath(stanza, path, true); end
-----------
--[[function get_room_disco_info(room, stanza)
return st.iq({type='result', id=stanza.attr.id, from=stanza.attr.to, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#info")
:tag("identity", {category='conference', type='text', name=room._data["name"]):up()
:tag("feature", {var="http://jabber.org/protocol/muc"}); -- TODO cache disco reply
end
function get_room_disco_items(room, stanza)
return st.iq({type='result', id=stanza.attr.id, from=stanza.attr.to, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#items");
end -- TODO allow non-private rooms]]
--
local room_mt = {};
room_mt.__index = room_mt;
function room_mt:get_default_role(affiliation)
if affiliation == "owner" or affiliation == "admin" then
return "moderator";
elseif affiliation == "member" or not affiliation then
return "participant";
end
end
function room_mt:broadcast_presence(stanza, sid, code, nick)
stanza = get_filtered_presence(stanza);
local occupant = self._occupants[stanza.attr.from];
stanza:tag("x", {xmlns='http://jabber.org/protocol/muc#user'})
:tag("item", {affiliation=occupant.affiliation or "none", role=occupant.role or "none", nick=nick}):up();
if code then
stanza:tag("status", {code=code}):up();
end
self:broadcast_except_nick(stanza, stanza.attr.from);
local me = self._occupants[stanza.attr.from];
if me then
stanza:tag("status", {code='110'});
stanza.attr.to = sid;
self:_route_stanza(stanza);
end
end
function room_mt:broadcast_message(stanza, historic)
local to = stanza.attr.to;
for occupant, o_data in pairs(self._occupants) do
for jid in pairs(o_data.sessions) do
stanza.attr.to = jid;
self:_route_stanza(stanza);
end
end
stanza.attr.to = to;
if historic then -- add to history
local history = self._data['history'];
if not history then history = {}; self._data['history'] = history; end
stanza = st.clone(stanza);
stanza:tag("delay", {xmlns = "urn:xmpp:delay", from = muc_domain, stamp = datetime.datetime()}):up(); -- XEP-0203
stanza:tag("x", {xmlns = "jabber:x:delay", from = muc_domain, stamp = datetime.legacy()}):up(); -- XEP-0091 (deprecated)
t_insert(history, st.preserialize(stanza));
while #history > history_length do t_remove(history, 1) end
end
end
function room_mt:broadcast_except_nick(stanza, nick)
for rnick, occupant in pairs(self._occupants) do
if rnick ~= nick then
for jid in pairs(occupant.sessions) do
stanza.attr.to = jid;
self:_route_stanza(stanza);
end
end
end
end
function room_mt:send_occupant_list(to)
local current_nick = self._jid_nick[to];
for occupant, o_data in pairs(self._occupants) do
if occupant ~= current_nick then
local pres = get_filtered_presence(o_data.sessions[o_data.jid]);
pres.attr.to, pres.attr.from = to, occupant;
pres:tag("x", {xmlns='http://jabber.org/protocol/muc#user'})
:tag("item", {affiliation=o_data.affiliation or "none", role=o_data.role or "none"}):up();
self:_route_stanza(pres);
end
end
end
function room_mt:send_history(to)
local history = self._data['history']; -- send discussion history
if history then
for _, msg in ipairs(history) do
msg = st.deserialize(msg);
msg.attr.to=to;
self:_route_stanza(msg);
end
end
if self._data['subject'] then
self:_route_stanza(st.message({type='groupchat', from=self.jid, to=to}):tag("subject"):text(self._data['subject']));
end
end
local function room_get_disco_info(self, stanza)
return st.reply(stanza):query("http://jabber.org/protocol/disco#info")
:tag("identity", {category="conference", type="text"}):up()
:tag("feature", {var="http://jabber.org/protocol/muc"});
end
local function room_get_disco_items(self, stanza)
local reply = st.reply(stanza):query("http://jabber.org/protocol/disco#items");
for room_jid in pairs(self._occupants) do
reply:tag("item", {jid = room_jid, name = room_jid:match("/(.*)")}):up();
end
return reply;
end
function room_mt:set_subject(current_nick, subject)
-- TODO check nick's authority
if subject == "" then subject = nil; end
self._data['subject'] = subject;
if self.save then self:save(); end
local msg = st.message({type='groupchat', from=current_nick})
:tag('subject'):text(subject):up();
self:broadcast_message(msg, false);
return true;
end
function room_mt:handle_to_occupant(origin, stanza) -- PM, vCards, etc
local from, to = stanza.attr.from, stanza.attr.to;
local room = jid_bare(to);
local current_nick = self._jid_nick[from];
local type = stanza.attr.type;
log("debug", "room: %s, current_nick: %s, stanza: %s", room or "nil", current_nick or "nil", stanza:top_tag());
if (select(2, jid_split(from)) == muc_domain) then error("Presence from the MUC itself!!!"); end
if stanza.name == "presence" then
local pr = get_filtered_presence(stanza);
pr.attr.from = current_nick;
if type == "error" then -- error, kick em out!
if current_nick then
log("debug", "kicking %s from %s", current_nick, room);
self:handle_to_occupant(origin, st.presence({type='unavailable', from=from, to=to})
:tag('status'):text('Kicked: '..get_error_condition(stanza))); -- send unavailable
end
elseif type == "unavailable" then -- unavailable
if current_nick then
log("debug", "%s leaving %s", current_nick, room);
local occupant = self._occupants[current_nick];
local new_jid = next(occupant.sessions);
if new_jid == from then new_jid = next(occupant.sessions, new_jid); end
if new_jid then
local jid = occupant.jid;
occupant.jid = new_jid;
occupant.sessions[from] = nil;
pr.attr.to = from;
pr:tag("x", {xmlns='http://jabber.org/protocol/muc#user'})
:tag("item", {affiliation=occupant.affiliation or "none", role='none'}):up()
:tag("status", {code='110'});
self:_route_stanza(pr);
if jid ~= new_jid then
pr = st.clone(occupant.sessions[new_jid])
:tag("x", {xmlns='http://jabber.org/protocol/muc#user'})
:tag("item", {affiliation=occupant.affiliation or "none", role=occupant.role or "none"});
pr.attr.from = current_nick;
self:broadcast_except_nick(pr, current_nick);
end
else
occupant.role = 'none';
self:broadcast_presence(pr, from);
self._occupants[current_nick] = nil;
end
self._jid_nick[from] = nil;
end
elseif not type then -- available
if current_nick then
--if #pr == #stanza or current_nick ~= to then -- commented because google keeps resending directed presence
if current_nick == to then -- simple presence
log("debug", "%s broadcasted presence", current_nick);
self._occupants[current_nick].sessions[from] = pr;
self:broadcast_presence(pr, from);
else -- change nick
local occupant = self._occupants[current_nick];
local is_multisession = next(occupant.sessions, next(occupant.sessions));
if self._occupants[to] or is_multisession then
log("debug", "%s couldn't change nick", current_nick);
local reply = st.error_reply(stanza, "cancel", "conflict"):up();
reply.tags[1].attr.code = "409";
origin.send(reply:tag("x", {xmlns = "http://jabber.org/protocol/muc"}));
else
local data = self._occupants[current_nick];
local to_nick = select(3, jid_split(to));
if to_nick then
log("debug", "%s (%s) changing nick to %s", current_nick, data.jid, to);
local p = st.presence({type='unavailable', from=current_nick});
self:broadcast_presence(p, from, '303', to_nick);
self._occupants[current_nick] = nil;
self._occupants[to] = data;
self._jid_nick[from] = to;
pr.attr.from = to;
self._occupants[to].sessions[from] = pr;
self:broadcast_presence(pr, from);
else
--TODO malformed-jid
end
end
end
--else -- possible rejoin
-- log("debug", "%s had connection replaced", current_nick);
-- self:handle_to_occupant(origin, st.presence({type='unavailable', from=from, to=to})
-- :tag('status'):text('Replaced by new connection'):up()); -- send unavailable
-- self:handle_to_occupant(origin, stanza); -- resend available
--end
else -- enter room
local new_nick = to;
local is_merge;
if self._occupants[to] then
if jid_bare(from) ~= jid_bare(self._occupants[to].jid) then
new_nick = nil;
end
is_merge = true;
end
if not new_nick then
log("debug", "%s couldn't join due to nick conflict: %s", from, to);
local reply = st.error_reply(stanza, "cancel", "conflict"):up();
reply.tags[1].attr.code = "409";
origin.send(reply:tag("x", {xmlns = "http://jabber.org/protocol/muc"}));
else
log("debug", "%s joining as %s", from, to);
if not next(self._affiliations) then -- new room, no owners
self._affiliations[jid_bare(from)] = "owner";
end
local affiliation = self:get_affiliation(from);
local role = self:get_default_role(affiliation)
if role then -- new occupant
if not is_merge then
self._occupants[to] = {affiliation=affiliation, role=role, jid=from, sessions={[from]=get_filtered_presence(stanza)}};
else
self._occupants[to].sessions[from] = get_filtered_presence(stanza);
end
self._jid_nick[from] = to;
self:send_occupant_list(from);
pr.attr.from = to;
if not is_merge then
self:broadcast_presence(pr, from);
else
pr.attr.to = from;
self:_route_stanza(pr:tag("x", {xmlns='http://jabber.org/protocol/muc#user'})
:tag("item", {affiliation=affiliation or "none", role=role or "none"}):up()
:tag("status", {code='110'}));
end
self:send_history(from);
else -- banned
local reply = st.error_reply(stanza, "auth", "forbidden"):up();
reply.tags[1].attr.code = "403";
origin.send(reply:tag("x", {xmlns = "http://jabber.org/protocol/muc"}));
end
end
end
elseif type ~= 'result' then -- bad type
if type ~= 'visible' and type ~= 'invisible' then -- COMPAT ejabberd can broadcast or forward XEP-0018 presences
origin.send(st.error_reply(stanza, "modify", "bad-request")); -- FIXME correct error?
end
end
elseif not current_nick then -- not in room
if type == "error" or type == "result" then
local id = stanza.name == "iq" and stanza.attr.id and base64.decode(stanza.attr.id);
local _nick, _id, _hash = (id or ""):match("^(.+)%z(.*)%z(.+)$");
local occupant = self._occupants[stanza.attr.to];
if occupant and _nick and self._jid_nick[_nick] and _id and _hash then
local id, _to = stanza.attr.id;
for jid in pairs(occupant.sessions) do
if md5(jid) == _hash then
_to = jid;
break;
end
end
if _to then
stanza.attr.to, stanza.attr.from, stanza.attr.id = _to, self._jid_nick[_nick], _id;
self:_route_stanza(stanza);
stanza.attr.to, stanza.attr.from, stanza.attr.id = to, from, id;
end
end
else
origin.send(st.error_reply(stanza, "cancel", "not-acceptable"));
end
elseif stanza.name == "message" and type == "groupchat" then -- groupchat messages not allowed in PM
origin.send(st.error_reply(stanza, "modify", "bad-request"));
elseif current_nick and stanza.name == "message" and type == "error" and is_kickable_error(stanza) then
log("debug", "%s kicked from %s for sending an error message", current_nick, self.jid);
self:handle_to_occupant(origin, st.presence({type='unavailable', from=stanza.attr.from, to=stanza.attr.to})
:tag('status'):text('Kicked: '..get_error_condition(stanza))); -- send unavailable
else -- private stanza
local o_data = self._occupants[to];
if o_data then
log("debug", "%s sent private stanza to %s (%s)", from, to, o_data.jid);
local jid = o_data.jid;
local bare = jid_bare(jid);
stanza.attr.to, stanza.attr.from = jid, current_nick;
local id = stanza.attr.id;
if stanza.name=='iq' and type=='get' and stanza.tags[1].attr.xmlns == 'vcard-temp' and bare ~= jid then
stanza.attr.to = bare;
stanza.attr.id = base64.encode(jid.."\0"..id.."\0"..md5(from));
end
self:_route_stanza(stanza);
stanza.attr.to, stanza.attr.from, stanza.attr.id = to, from, id;
elseif type ~= "error" and type ~= "result" then -- recipient not in room
origin.send(st.error_reply(stanza, "cancel", "item-not-found", "Recipient not in room"));
end
end
end
function room_mt:handle_form(origin, stanza)
if self:get_affiliation(stanza.attr.from) ~= "owner" then origin.send(st.error_reply(stanza, "auth", "forbidden")); return; end
if stanza.attr.type == "get" then
local title = "Configuration for "..self.jid;
origin.send(st.reply(stanza):query("http://jabber.org/protocol/muc#owner")
:tag("x", {xmlns='jabber:x:data', type='form'})
:tag("title"):text(title):up()
:tag("instructions"):text(title):up()
:tag("field", {type='hidden', var='FORM_TYPE'}):tag("value"):text("http://jabber.org/protocol/muc#roomconfig"):up():up()
:tag("field", {type='boolean', label='Make Room Persistent?', var='muc#roomconfig_persistentroom'})
:tag("value"):text(self._data.persistent and "1" or "0"):up()
:up()
:tag("field", {type='boolean', label='Make Room Publicly Searchable?', var='muc#roomconfig_publicroom'})
:tag("value"):text(self._data.hidden and "0" or "1"):up()
:up()
);
elseif stanza.attr.type == "set" then
local query = stanza.tags[1];
local form;
for _, tag in ipairs(query.tags) do if tag.name == "x" and tag.attr.xmlns == "jabber:x:data" then form = tag; break; end end
if not form then origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); return; end
if form.attr.type == "cancel" then origin.send(st.reply(stanza)); return; end
if form.attr.type ~= "submit" then origin.send(st.error_reply(stanza, "cancel", "bad-request")); return; end
local fields = {};
for _, field in pairs(form.tags) do
if field.name == "field" and field.attr.var and field.tags[1].name == "value" and #field.tags[1].tags == 0 then
fields[field.attr.var] = field.tags[1][1] or "";
end
end
if fields.FORM_TYPE ~= "http://jabber.org/protocol/muc#roomconfig" then origin.send(st.error_reply(stanza, "cancel", "bad-request")); return; end
local persistent = fields['muc#roomconfig_persistentroom'];
if persistent == "0" or persistent == "false" then persistent = nil; elseif persistent == "1" or persistent == "true" then persistent = true;
else origin.send(st.error_reply(stanza, "cancel", "bad-request")); return; end
self._data.persistent = persistent;
module:log("debug", "persistent=%s", tostring(persistent));
local public = fields['muc#roomconfig_publicroom'];
if public == "0" or public == "false" then public = nil; elseif public == "1" or public == "true" then public = true;
else origin.send(st.error_reply(stanza, "cancel", "bad-request")); return; end
self._data.hidden = not public and true or nil;
if self.save then self:save(true); end
origin.send(st.reply(stanza));
end
end
function room_mt:handle_to_room(origin, stanza) -- presence changes and groupchat messages, along with disco/etc
local type = stanza.attr.type;
local xmlns = stanza.tags[1] and stanza.tags[1].attr.xmlns;
if stanza.name == "iq" then
if xmlns == "http://jabber.org/protocol/disco#info" and type == "get" then
origin.send(room_get_disco_info(self, stanza));
elseif xmlns == "http://jabber.org/protocol/disco#items" and type == "get" then
origin.send(room_get_disco_items(self, stanza));
elseif xmlns == "http://jabber.org/protocol/muc#admin" then
local actor = stanza.attr.from;
local affiliation = self:get_affiliation(actor);
local current_nick = self._jid_nick[actor];
local role = current_nick and self._occupants[current_nick].role or self:get_default_role(affiliation);
local item = stanza.tags[1].tags[1];
if item and item.name == "item" then
if type == "set" then
local callback = function() origin.send(st.reply(stanza)); end
if item.attr.jid then -- Validate provided JID
item.attr.jid = jid_prep(item.attr.jid);
if not item.attr.jid then
origin.send(st.error_reply(stanza, "modify", "jid-malformed"));
return;
end
end
if not item.attr.jid and item.attr.nick then -- COMPAT Workaround for Miranda sending 'nick' instead of 'jid' when changing affiliation
local occupant = self._occupants[self.jid.."/"..item.attr.nick];
if occupant then item.attr.jid = occupant.jid; end
elseif not item.attr.nick and item.attr.jid then
local nick = self._jid_nick[item.attr.jid];
if nick then item.attr.nick = select(3, jid_split(nick)); end
end
local reason = item.tags[1] and item.tags[1].name == "reason" and #item.tags[1] == 1 and item.tags[1][1];
if item.attr.affiliation and item.attr.jid and not item.attr.role then
local success, errtype, err = self:set_affiliation(actor, item.attr.jid, item.attr.affiliation, callback, reason);
if not success then origin.send(st.error_reply(stanza, errtype, err)); end
elseif item.attr.role and item.attr.nick and not item.attr.affiliation then
local success, errtype, err = self:set_role(actor, self.jid.."/"..item.attr.nick, item.attr.role, callback, reason);
if not success then origin.send(st.error_reply(stanza, errtype, err)); end
else
origin.send(st.error_reply(stanza, "cancel", "bad-request"));
end
elseif type == "get" then
local _aff = item.attr.affiliation;
local _rol = item.attr.role;
if _aff and not _rol then
if affiliation == "owner" or (affiliation == "admin" and _aff ~= "owner" and _aff ~= "admin") then
local reply = st.reply(stanza):query("http://jabber.org/protocol/muc#admin");
for jid, affiliation in pairs(self._affiliations) do
if affiliation == _aff then
reply:tag("item", {affiliation = _aff, jid = jid}):up();
end
end
origin.send(reply);
else
origin.send(st.error_reply(stanza, "auth", "forbidden"));
end
elseif _rol and not _aff then
if role == "moderator" then
-- TODO allow admins and owners not in room? Provide read-only access to everyone who can see the participants anyway?
if _rol == "none" then _rol = nil; end
local reply = st.reply(stanza):query("http://jabber.org/protocol/muc#admin");
for occupant_jid, occupant in pairs(self._occupants) do
if occupant.role == _rol then
reply:tag("item", {
nick = select(3, jid_split(occupant_jid)),
role = _rol or "none",
affiliation = occupant.affiliation or "none",
jid = occupant.jid
}):up();
end
end
origin.send(reply);
else
origin.send(st.error_reply(stanza, "auth", "forbidden"));
end
else
origin.send(st.error_reply(stanza, "cancel", "bad-request"));
end
end
elseif type == "set" or type == "get" then
origin.send(st.error_reply(stanza, "cancel", "bad-request"));
end
elseif xmlns == "http://jabber.org/protocol/muc#owner" and (type == "get" or type == "set") and stanza.tags[1].name == "query" then
self:handle_form(origin, stanza);
elseif type == "set" or type == "get" then
origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
end
elseif stanza.name == "message" and type == "groupchat" then
local from, to = stanza.attr.from, stanza.attr.to;
local room = jid_bare(to);
local current_nick = self._jid_nick[from];
local occupant = self._occupants[current_nick];
if not occupant then -- not in room
origin.send(st.error_reply(stanza, "cancel", "not-acceptable"));
elseif occupant.role == "visitor" then
origin.send(st.error_reply(stanza, "cancel", "forbidden"));
else
local from = stanza.attr.from;
stanza.attr.from = current_nick;
local subject = getText(stanza, {"subject"});
if subject then
if occupant.role == "moderator" then
self:set_subject(current_nick, subject); -- TODO use broadcast_message_stanza
else
stanza.attr.from = from;
origin.send(st.error_reply(stanza, "cancel", "forbidden"));
end
else
self:broadcast_message(stanza, true);
end
stanza.attr.from = from;
end
elseif stanza.name == "message" and type == "error" and is_kickable_error(stanza) then
local current_nick = self._jid_nick[stanza.attr.from];
log("debug", "%s kicked from %s for sending an error message", current_nick, self.jid);
self:handle_to_occupant(origin, st.presence({type='unavailable', from=stanza.attr.from, to=stanza.attr.to})
:tag('status'):text('Kicked: '..get_error_condition(stanza))); -- send unavailable
elseif stanza.name == "presence" then -- hack - some buggy clients send presence updates to the room rather than their nick
local to = stanza.attr.to;
local current_nick = self._jid_nick[stanza.attr.from];
if current_nick then
stanza.attr.to = current_nick;
self:handle_to_occupant(origin, stanza);
stanza.attr.to = to;
elseif type ~= "error" and type ~= "result" then
origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
end
elseif stanza.name == "message" and not stanza.attr.type and #stanza.tags == 1 and self._jid_nick[stanza.attr.from]
and stanza.tags[1].name == "x" and stanza.tags[1].attr.xmlns == "http://jabber.org/protocol/muc#user" then
local x = stanza.tags[1];
local payload = (#x.tags == 1 and x.tags[1]);
if payload and payload.name == "invite" and payload.attr.to then
local _from, _to = stanza.attr.from, stanza.attr.to;
local _invitee = jid_prep(payload.attr.to);
if _invitee then
local _reason = payload.tags[1] and payload.tags[1].name == 'reason' and #payload.tags[1].tags == 0 and payload.tags[1][1];
local invite = st.message({from = _to, to = _invitee, id = stanza.attr.id})
:tag('x', {xmlns='http://jabber.org/protocol/muc#user'})
:tag('invite', {from=_from})
:tag('reason'):text(_reason or ""):up()
:up()
:up()
:tag('x', {xmlns="jabber:x:conference", jid=_to}) -- COMPAT: Some older clients expect this
:text(_reason or "")
:up()
:tag('body') -- Add a plain message for clients which don't support invites
:text(_from..' invited you to the room '.._to..(_reason and (' ('.._reason..')') or ""))
:up();
self:_route_stanza(invite);
else
origin.send(st.error_reply(stanza, "cancel", "jid-malformed"));
end
else
origin.send(st.error_reply(stanza, "cancel", "bad-request"));
end
else
if type == "error" or type == "result" then return; end
origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
end
end
function room_mt:handle_stanza(origin, stanza)
local to_node, to_host, to_resource = jid_split(stanza.attr.to);
if to_resource then
self:handle_to_occupant(origin, stanza);
else
self:handle_to_room(origin, stanza);
end
end
function room_mt:route_stanza(stanza) end -- Replace with a routing function, e.g., function(room, stanza) core_route_stanza(origin, stanza); end
function room_mt:get_affiliation(jid)
local node, host, resource = jid_split(jid);
local bare = node and node.."@"..host or host;
local result = self._affiliations[bare]; -- Affiliations are granted, revoked, and maintained based on the user's bare JID.
if not result and self._affiliations[host] == "outcast" then result = "outcast"; end -- host banned
return result;
end
function room_mt:set_affiliation(actor, jid, affiliation, callback, reason)
jid = jid_bare(jid);
if affiliation == "none" then affiliation = nil; end
if affiliation and affiliation ~= "outcast" and affiliation ~= "owner" and affiliation ~= "admin" and affiliation ~= "member" then
return nil, "modify", "not-acceptable";
end
if self:get_affiliation(actor) ~= "owner" then return nil, "cancel", "not-allowed"; end
if jid_bare(actor) == jid then return nil, "cancel", "not-allowed"; end
self._affiliations[jid] = affiliation;
local role = self:get_default_role(affiliation);
local p = st.presence()
:tag("x", {xmlns = "http://jabber.org/protocol/muc#user"})
:tag("item", {affiliation=affiliation or "none", role=role or "none"})
:tag("reason"):text(reason or ""):up()
:up();
local x = p.tags[1];
local item = x.tags[1];
if not role then -- getting kicked
p.attr.type = "unavailable";
if affiliation == "outcast" then
x:tag("status", {code="301"}):up(); -- banned
else
x:tag("status", {code="321"}):up(); -- affiliation change
end
end
local modified_nicks = {};
for nick, occupant in pairs(self._occupants) do
if jid_bare(occupant.jid) == jid then
if not role then -- getting kicked
self._occupants[nick] = nil;
else
t_insert(modified_nicks, nick);
occupant.affiliation, occupant.role = affiliation, role;
end
p.attr.from = nick;
for jid in pairs(occupant.sessions) do -- remove for all sessions of the nick
if not role then self._jid_nick[jid] = nil; end
p.attr.to = jid;
self:_route_stanza(p);
end
end
end
if self.save then self:save(); end
if callback then callback(); end
for _, nick in ipairs(modified_nicks) do
p.attr.from = nick;
self:broadcast_except_nick(p, nick);
end
return true;
end
function room_mt:get_role(nick)
local session = self._occupants[nick];
return session and session.role or nil;
end
function room_mt:set_role(actor, occupant_jid, role, callback, reason)
if role == "none" then role = nil; end
if role and role ~= "moderator" and role ~= "participant" and role ~= "visitor" then return nil, "modify", "not-acceptable"; end
if self:get_affiliation(actor) ~= "owner" then return nil, "cancel", "not-allowed"; end
local occupant = self._occupants[occupant_jid];
if not occupant then return nil, "modify", "not-acceptable"; end
if occupant.affiliation == "owner" or occupant.affiliation == "admin" then return nil, "cancel", "not-allowed"; end
local p = st.presence({from = occupant_jid})
:tag("x", {xmlns = "http://jabber.org/protocol/muc#user"})
:tag("item", {affiliation=occupant.affiliation or "none", nick=select(3, jid_split(occupant_jid)), role=role or "none"})
:tag("reason"):text(reason or ""):up()
:up();
if not role then -- kick
p.attr.type = "unavailable";
self._occupants[occupant_jid] = nil;
for jid in pairs(occupant.sessions) do -- remove for all sessions of the nick
self._jid_nick[jid] = nil;
end
p:tag("status", {code = "307"}):up();
else
occupant.role = role;
end
for jid in pairs(occupant.sessions) do -- send to all sessions of the nick
p.attr.to = jid;
self:_route_stanza(p);
end
if callback then callback(); end
self:broadcast_except_nick(p, occupant_jid);
return true;
end
function room_mt:_route_stanza(stanza)
local muc_child;
local to_occupant = self._occupants[self._jid_nick[stanza.attr.to]];
local from_occupant = self._occupants[stanza.attr.from];
if stanza.name == "presence" then
if to_occupant and from_occupant then
if to_occupant.role == "moderator" or jid_bare(to_occupant.jid) == jid_bare(from_occupant.jid) then
for i=#stanza.tags,1,-1 do
local tag = stanza.tags[i];
if tag.name == "x" and tag.attr.xmlns == "http://jabber.org/protocol/muc#user" then
muc_child = tag;
break;
end
end
end
end
end
if muc_child then
for _, item in pairs(muc_child.tags) do
if item.name == "item" then
if from_occupant == to_occupant then
item.attr.jid = stanza.attr.to;
else
item.attr.jid = from_occupant.jid;
end
end
end
end
self:route_stanza(stanza);
if muc_child then
for _, item in pairs(muc_child.tags) do
if item.name == "item" then
item.attr.jid = nil;
end
end
end
end
local _M = {}; -- module "muc"
function _M.new_room(jid)
return setmetatable({
jid = jid;
_jid_nick = {};
_occupants = {};
_data = {};
_affiliations = {};
}, room_mt);
end
return _M;
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