MUC: Correctly iterate over suspended rooms while excluding live rooms
[prosody.git] / plugins / muc / mod_muc.lua
index 693515042456856a5c7b1b994ecf5a19c48f02ec..be34c652e3b62a668eed2b3cefdf4c18f1332f13 100644 (file)
 -- COPYING file in the source package for more information.
 --
 
-local array = require "util.array";
-
 if module:get_host_type() ~= "component" then
-       error("MUC should be loaded as a component, please see http://prosody.im/doc/components", 0);
+       error("MUC should be loaded as a component, please see https://prosody.im/doc/components", 0);
 end
 
-local muc_host = module:get_host();
-local muc_name = module:get_option("name");
-if type(muc_name) ~= "string" then muc_name = "Prosody Chatrooms"; end
-local restrict_room_creation = module:get_option("restrict_room_creation");
-if restrict_room_creation then
-       if restrict_room_creation == true then
-               restrict_room_creation = "admin";
-       elseif restrict_room_creation ~= "admin" and restrict_room_creation ~= "local" then
-               restrict_room_creation = nil;
-       end
+local muclib = module:require "muc";
+room_mt = muclib.room_mt; -- Yes, global.
+
+local affiliation_notify = module:require "muc/affiliation_notify"; -- luacheck: ignore 211
+
+local name = module:require "muc/name";
+room_mt.get_name = name.get;
+room_mt.set_name = name.set;
+
+local description = module:require "muc/description";
+room_mt.get_description = description.get;
+room_mt.set_description = description.set;
+
+local hidden = module:require "muc/hidden";
+room_mt.get_hidden = hidden.get;
+room_mt.set_hidden = hidden.set;
+function room_mt:get_public()
+       return not self:get_hidden();
+end
+function room_mt:set_public(public)
+       return self:set_hidden(not public);
 end
-local lock_rooms = module:get_option_boolean("muc_room_locking", false);
-local lock_room_timeout = module:get_option_number("muc_room_lock_timeout", 300);
 
-local muclib = module:require "muc";
-local muc_new_room = muclib.new_room;
+local password = module:require "muc/password";
+room_mt.get_password = password.get;
+room_mt.set_password = password.set;
+
+local members_only = module:require "muc/members_only";
+room_mt.get_members_only = members_only.get;
+room_mt.set_members_only = members_only.set;
+
+local moderated = module:require "muc/moderated";
+room_mt.get_moderated = moderated.get;
+room_mt.set_moderated = moderated.set;
+
+local persistent = module:require "muc/persistent";
+room_mt.get_persistent = persistent.get;
+room_mt.set_persistent = persistent.set;
+
+local subject = module:require "muc/subject";
+room_mt.get_changesubject = subject.get_changesubject;
+room_mt.set_changesubject = subject.set_changesubject;
+room_mt.get_subject = subject.get;
+room_mt.set_subject = subject.set;
+room_mt.send_subject = subject.send;
+
+local history = module:require "muc/history";
+room_mt.send_history = history.send;
+room_mt.get_historylength = history.get_length;
+room_mt.set_historylength = history.set_length;
+
 local jid_split = require "util.jid".split;
 local jid_bare = require "util.jid".bare;
 local st = require "util.stanza";
-local uuid_gen = require "util.uuid".generate;
+local cache = require "util.cache";
 local um_is_admin = require "core.usermanager".is_admin;
-local hosts = prosody.hosts;
-
-rooms = {};
-local rooms = rooms;
-local persistent_rooms_storage = module:open_store("persistent");
-local persistent_rooms = persistent_rooms_storage:get() or {};
-local room_configs = module:open_store("config");
-
--- Configurable options
-muclib.set_max_history_length(module:get_option_number("max_history_messages"));
 
 module:depends("disco");
-module:add_identity("conference", "text", muc_name);
+module:add_identity("conference", "text", module:get_option_string("name", "Prosody Chatrooms"));
 module:add_feature("http://jabber.org/protocol/muc");
+module:depends "muc_unique"
+module:require "muc/lock";
 
 local function is_admin(jid)
        return um_is_admin(jid, module.host);
 end
 
-room_mt = muclib.room_mt; -- Yes, global.
-local _set_affiliation = room_mt.set_affiliation;
-local _get_affiliation = room_mt.get_affiliation;
-function muclib.room_mt:get_affiliation(jid)
-       if is_admin(jid) then return "owner"; end
-       return _get_affiliation(self, jid);
-end
-function muclib.room_mt:set_affiliation(actor, jid, affiliation, callback, reason)
-       if affiliation ~= "owner" and is_admin(jid) then return nil, "modify", "not-acceptable"; end
-       return _set_affiliation(self, actor, jid, affiliation, callback, reason);
+do -- Monkey patch to make server admins room owners
+       local _get_affiliation = room_mt.get_affiliation;
+       function room_mt:get_affiliation(jid)
+               if is_admin(jid) then return "owner"; end
+               return _get_affiliation(self, jid);
+       end
+
+       local _set_affiliation = room_mt.set_affiliation;
+       function room_mt:set_affiliation(actor, jid, affiliation, reason)
+               if affiliation ~= "owner" and is_admin(jid) then return nil, "modify", "not-acceptable"; end
+               return _set_affiliation(self, actor, jid, affiliation, reason);
+       end
 end
 
-local function room_route_stanza(room, stanza) module:send(stanza); end
+local persistent_rooms_storage = module:open_store("persistent");
+local persistent_rooms = module:open_store("persistent", "map");
+local room_configs = module:open_store("config");
+
+local room_items_cache = {};
+
 local function room_save(room, forced)
        local node = jid_split(room.jid);
-       persistent_rooms[room.jid] = room._data.persistent;
-       if room._data.persistent then
-               local history = room._data.history;
-               room._data.history = nil;
-               local data = {
-                       jid = room.jid;
-                       _data = room._data;
-                       _affiliations = room._affiliations;
-               };
-               room_configs:set(node, data);
-               room._data.history = history;
-       elseif forced then
-               room_configs:set(node, nil);
-               if not next(room._occupants) then -- Room empty
-                       rooms[room.jid] = nil;
-               end
+       local is_persistent = persistent.get(room);
+       room_items_cache[room.jid] = room:get_public() and room:get_name() or nil;
+       if is_persistent or forced then
+               persistent_rooms:set(nil, room.jid, true);
+               local data = room:freeze(forced);
+               return room_configs:set(node, data);
+       else
+               persistent_rooms:set(nil, room.jid, nil);
+               return room_configs:set(node, nil);
        end
-       if forced then persistent_rooms_storage:set(nil, persistent_rooms); end
 end
 
-function create_room(jid)
-       local room = muc_new_room(jid);
-       room.route_stanza = room_route_stanza;
-       room.save = room_save;
-       rooms[jid] = room;
-       if lock_rooms then
-               room.locked = true;
-               if lock_room_timeout and lock_room_timeout > 0 then
-                       module:add_timer(lock_room_timeout, function ()
-                               if room.locked then
-                                       room:destroy(); -- Not unlocked in time
-                               end
-                       end);
-               end
+local rooms = cache.new(module:get_option_number("muc_room_cache_size", 100), function (_, room)
+       module:log("debug", "%s evicted", room);
+       room_save(room, true); -- Force to disk
+end);
+
+-- Automatically destroy empty non-persistent rooms
+module:hook("muc-occupant-left",function(event)
+       local room = event.room
+       if not room:has_occupant() and not persistent.get(room) then -- empty, non-persistent room
+               module:fire_event("muc-room-destroyed", { room = room });
        end
-       module:fire_event("muc-room-created", { room = room });
-       return room;
+end);
+
+function track_room(room)
+       rooms:set(room.jid, room);
+       -- When room is created, over-ride 'save' method
+       room.save = room_save;
 end
 
-local persistent_errors = false;
-for jid in pairs(persistent_rooms) do
+local function restore_room(jid)
        local node = jid_split(jid);
        local data = room_configs:get(node);
        if data then
-               local room = create_room(jid);
-               room._data = data._data;
-               room._affiliations = data._affiliations;
-       else -- missing room data
-               persistent_rooms[jid] = nil;
-               module:log("error", "Missing data for room '%s', removing from persistent room list", jid);
-               persistent_errors = true;
+               local room = muclib.restore_room(data);
+               track_room(room);
+               return room;
        end
 end
-if persistent_errors then persistent_rooms_storage:set(nil, persistent_rooms); end
 
-local host_room = muc_new_room(muc_host);
-host_room.route_stanza = room_route_stanza;
-host_room.save = room_save;
+function forget_room(room)
+       module:log("debug", "Forgetting %s", room);
+       rooms.save = nil;
+       rooms:set(room.jid, nil);
+end
 
-module:hook("host-disco-items", function(event)
-       local reply = event.reply;
-       module:log("debug", "host-disco-items called");
-       for jid, room in pairs(rooms) do
-               if not room:get_hidden() then
-                       reply:tag("item", {jid=jid, name=room:get_name()}):up();
-               end
+function delete_room(room)
+       module:log("debug", "Deleting %s", room);
+       room_configs:set(jid_split(room.jid), nil);
+       persistent_rooms:set(nil, room.jid, nil);
+       room_items_cache[room.jid] = nil;
+end
+
+function module.unload()
+       for room in rooms:values() do
+               room:save(true);
+               forget_room(room);
        end
-end);
+end
 
-local function handle_to_domain(event)
-       local origin, stanza = event.origin, event.stanza;
-       local type = stanza.attr.type;
-       if type == "error" or type == "result" then return; end
-       if stanza.name == "iq" and type == "get" then
-               local xmlns = stanza.tags[1].attr.xmlns;
-               local node = stanza.tags[1].attr.node;
-               if xmlns == "http://jabber.org/protocol/muc#unique" then
-                       origin.send(st.reply(stanza):tag("unique", {xmlns = xmlns}):text(uuid_gen())); -- FIXME Random UUIDs can theoretically have collisions
-               else
-                       origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- TODO disco/etc
-               end
-       else
-               host_room:handle_stanza(origin, stanza);
-               --origin.send(st.error_reply(stanza, "cancel", "service-unavailable", "The muc server doesn't deal with messages and presence directed at it"));
+function get_room_from_jid(room_jid)
+       local room = rooms:get(room_jid);
+       if room then
+               rooms:set(room_jid, room); -- bump to top;
+               return room;
        end
-       return true;
+       return restore_room(room_jid);
 end
 
-function stanza_handler(event)
-       local origin, stanza = event.origin, event.stanza;
-       local bare = jid_bare(stanza.attr.to);
-       local room = rooms[bare];
-       if not room then
-               if stanza.name ~= "presence" then
-                       origin.send(st.error_reply(stanza, "cancel", "item-not-found"));
-                       return true;
+function each_room(local_only)
+       if local_only then
+               return rooms:values();
+       end
+       return coroutine.wrap(function ()
+               local seen = {}; -- Don't iterate over persistent rooms twice
+               for room in rooms:values() do
+                       coroutine.yield(room);
+                       seen[room.jid] = true;
                end
-               if not(restrict_room_creation) or
-                 is_admin(stanza.attr.from) or
-                 (restrict_room_creation == "local" and select(2, jid_split(stanza.attr.from)) == module.host:gsub("^[^%.]+%.", "")) then
-                       room = create_room(bare);
+               for room_jid in pairs(persistent_rooms_storage:get(nil) or {}) do
+                       if not seen[room_jid] then
+                               local room = restore_room(room_jid);
+                               if room == nil then
+                                       module:log("error", "Missing data for room '%s', omitting from iteration", room_jid);
+                               else
+                                       coroutine.yield(room);
+                               end
+                       end
                end
-       end
-       if room then
-               room:handle_stanza(origin, stanza);
-               if not next(room._occupants) and not persistent_rooms[room.jid] then -- empty, non-persistent room
-                       module:fire_event("muc-room-destroyed", { room = room });
-                       rooms[bare] = nil; -- discard room
+       end);
+end
+
+module:hook("host-disco-items", function(event)
+       local reply = event.reply;
+       module:log("debug", "host-disco-items called");
+       if next(room_items_cache) ~= nil then
+               for jid, room_name in pairs(room_items_cache) do
+                       reply:tag("item", { jid = jid, name = room_name }):up();
                end
        else
-               origin.send(st.error_reply(stanza, "cancel", "not-allowed"));
+               for room in each_room() do
+                       if not room:get_hidden() then
+                               local jid, room_name = room.jid, room:get_name();
+                               room_items_cache[jid] = name;
+                               reply:tag("item", { jid = jid, name = room_name }):up();
+                       end
+               end
        end
-       return true;
-end
-module:hook("iq/bare", stanza_handler, -1);
-module:hook("message/bare", stanza_handler, -1);
-module:hook("presence/bare", stanza_handler, -1);
-module:hook("iq/full", stanza_handler, -1);
-module:hook("message/full", stanza_handler, -1);
-module:hook("presence/full", stanza_handler, -1);
-module:hook("iq/host", handle_to_domain, -1);
-module:hook("message/host", handle_to_domain, -1);
-module:hook("presence/host", handle_to_domain, -1);
-
-hosts[module.host].send = function(stanza) -- FIXME do a generic fix
-       if stanza.attr.type == "result" or stanza.attr.type == "error" then
-               module:send(stanza);
-       else error("component.send only supports result and error stanzas at the moment"); end
-end
+end);
 
-hosts[module:get_host()].muc = { rooms = rooms };
+module:hook("muc-room-pre-create", function(event)
+       track_room(event.room);
+end, -1000);
 
-local saved = false;
-module.save = function()
-       saved = true;
-       return {rooms = rooms};
-end
-module.restore = function(data)
-       for jid, oldroom in pairs(data.rooms or {}) do
-               local room = create_room(jid);
-               room._jid_nick = oldroom._jid_nick;
-               room._occupants = oldroom._occupants;
-               room._data = oldroom._data;
-               room._affiliations = oldroom._affiliations;
+module:hook("muc-room-destroyed",function(event)
+       local room = event.room;
+       forget_room(room);
+       delete_room(room);
+end);
+
+do
+       local restrict_room_creation = module:get_option("restrict_room_creation");
+       if restrict_room_creation == true then
+               restrict_room_creation = "admin";
+       end
+       if restrict_room_creation then
+               local host_suffix = module.host:gsub("^[^%.]+%.", "");
+               module:hook("muc-room-pre-create", function(event)
+                       local origin, stanza = event.origin, event.stanza;
+                       local user_jid = stanza.attr.from;
+                       if not is_admin(user_jid) and not (
+                               restrict_room_creation == "local" and
+                               select(2, jid_split(user_jid)) == host_suffix
+                       ) then
+                               origin.send(st.error_reply(stanza, "cancel", "not-allowed"));
+                               return true;
+                       end
+               end);
        end
-       hosts[module:get_host()].muc = { rooms = rooms };
 end
 
-function shutdown_room(room, stanza)
-       for nick, occupant in pairs(room._occupants) do
-               stanza.attr.from = nick;
-               for jid in pairs(occupant.sessions) do
-                       stanza.attr.to = jid;
-                       room:_route_stanza(stanza);
-                       room._jid_nick[jid] = nil;
+for event_name, method in pairs {
+       -- Normal room interactions
+       ["iq-get/bare/http://jabber.org/protocol/disco#info:query"] = "handle_disco_info_get_query" ;
+       ["iq-get/bare/http://jabber.org/protocol/disco#items:query"] = "handle_disco_items_get_query" ;
+       ["iq-set/bare/http://jabber.org/protocol/muc#admin:query"] = "handle_admin_query_set_command" ;
+       ["iq-get/bare/http://jabber.org/protocol/muc#admin:query"] = "handle_admin_query_get_command" ;
+       ["iq-set/bare/http://jabber.org/protocol/muc#owner:query"] = "handle_owner_query_set_to_room" ;
+       ["iq-get/bare/http://jabber.org/protocol/muc#owner:query"] = "handle_owner_query_get_to_room" ;
+       ["message/bare"] = "handle_message_to_room" ;
+       ["presence/bare"] = "handle_presence_to_room" ;
+       -- Host room
+       ["iq-get/host/http://jabber.org/protocol/disco#info:query"] = "handle_disco_info_get_query" ;
+       ["iq-get/host/http://jabber.org/protocol/disco#items:query"] = "handle_disco_items_get_query" ;
+       ["iq-set/host/http://jabber.org/protocol/muc#admin:query"] = "handle_admin_query_set_command" ;
+       ["iq-get/host/http://jabber.org/protocol/muc#admin:query"] = "handle_admin_query_get_command" ;
+       ["iq-set/host/http://jabber.org/protocol/muc#owner:query"] = "handle_owner_query_set_to_room" ;
+       ["iq-get/host/http://jabber.org/protocol/muc#owner:query"] = "handle_owner_query_get_to_room" ;
+       ["message/host"] = "handle_message_to_room" ;
+       ["presence/host"] = "handle_presence_to_room" ;
+       -- Direct to occupant (normal rooms and host room)
+       ["presence/full"] = "handle_presence_to_occupant" ;
+       ["iq/full"] = "handle_iq_to_occupant" ;
+       ["message/full"] = "handle_message_to_occupant" ;
+} do
+       module:hook(event_name, function (event)
+               local origin, stanza = event.origin, event.stanza;
+               local room_jid = jid_bare(stanza.attr.to);
+               local room = get_room_from_jid(room_jid);
+               if room == nil then
+                       -- Watch presence to create rooms
+                       if stanza.attr.type == nil and stanza.name == "presence" then
+                               room = muclib.new_room(room_jid);
+                       elseif stanza.attr.type ~= "error" then
+                               origin.send(st.error_reply(stanza, "cancel", "not-allowed"));
+                               return true;
+                       else
+                               return;
+                       end
                end
-               room._occupants[nick] = nil;
-       end
+               return room[method](room, origin, stanza);
+       end, -2)
 end
+
 function shutdown_component()
-       if not saved then
-               local stanza = st.presence({type = "unavailable"})
-                       :tag("x", {xmlns = "http://jabber.org/protocol/muc#user"})
-                               :tag("item", { affiliation='none', role='none' }):up()
-                               :tag("status", { code = "332"}):up();
-               for roomjid, room in pairs(rooms) do
-                       shutdown_room(room, stanza);
-               end
-               shutdown_room(host_room, stanza);
+       for room in each_room(true) do
+               room:save(true);
        end
 end
-module.unload = shutdown_component;
 module:hook_global("server-stopping", shutdown_component);
 
--- Ad-hoc commands
-module:depends("adhoc")
-local t_concat = table.concat;
-local keys = require "util.iterators".keys;
-local adhoc_new = module:require "adhoc".new;
-local adhoc_initial = require "util.adhoc".new_initial_data_form;
-local dataforms_new = require "util.dataforms".new;
-
-local destroy_rooms_layout = dataforms_new {
-       title = "Destroy rooms";
-       instructions = "Select the rooms to destroy";
-
-       { name = "FORM_TYPE", type = "hidden", value = "http://prosody.im/protocol/muc#destroy" };
-       { name = "rooms", type = "list-multi", required = true, label = "Rooms to destroy:"};
-};
-
-local destroy_rooms_handler = adhoc_initial(destroy_rooms_layout, function()
-       return { rooms = array.collect(keys(rooms)):sort() };
-end, function(fields, errors)
-       if errors then
-               local errmsg = {};
-               for name, err in pairs(errors) do
-                       errmsg[#errmsg + 1] = name .. ": " .. err;
+do -- Ad-hoc commands
+       module:depends "adhoc";
+       local t_concat = table.concat;
+       local adhoc_new = module:require "adhoc".new;
+       local adhoc_initial = require "util.adhoc".new_initial_data_form;
+       local array = require "util.array";
+       local dataforms_new = require "util.dataforms".new;
+
+       local destroy_rooms_layout = dataforms_new {
+               title = "Destroy rooms";
+               instructions = "Select the rooms to destroy";
+
+               { name = "FORM_TYPE", type = "hidden", value = "http://prosody.im/protocol/muc#destroy" };
+               { name = "rooms", type = "list-multi", required = true, label = "Rooms to destroy:"};
+       };
+
+       local destroy_rooms_handler = adhoc_initial(destroy_rooms_layout, function()
+               return { rooms = array.collect(each_room()):pluck("jid"):sort(); };
+       end, function(fields, errors)
+               if errors then
+                       local errmsg = {};
+                       for field, err in pairs(errors) do
+                               errmsg[#errmsg + 1] = field .. ": " .. err;
+                       end
+                       return { status = "completed", error = { message = t_concat(errmsg, "\n") } };
                end
-               return { status = "completed", error = { message = t_concat(errmsg, "\n") } };
-       end
-       for _, room in ipairs(fields.rooms) do
-               rooms[room]:destroy();
-               rooms[room] = nil;
-       end
-       return { status = "completed", info = "The following rooms were destroyed:\n"..t_concat(fields.rooms, "\n") };
-end);
-local destroy_rooms_desc = adhoc_new("Destroy Rooms", "http://prosody.im/protocol/muc#destroy", destroy_rooms_handler, "admin");
+               for _, room in ipairs(fields.rooms) do
+                       get_room_from_jid(room):destroy();
+               end
+               return { status = "completed", info = "The following rooms were destroyed:\n"..t_concat(fields.rooms, "\n") };
+       end);
+       local destroy_rooms_desc = adhoc_new("Destroy Rooms", "http://prosody.im/protocol/muc#destroy", destroy_rooms_handler, "admin");
 
-module:provides("adhoc", destroy_rooms_desc);
+       module:provides("adhoc", destroy_rooms_desc);
+end