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403aba5e49d5
plugins/muc/mod_muc.lua

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plugins/muc/mod_muc.lua @ 4260:403aba5e49d5

mod_muc: Remove room from memory when it is made non-persistent and is empty
author Matthew Wild <mwild1@gmail.com>
date Wed, 04 May 2011 23:12:53 +0100
parent 3799:6a6a39b90cc0
child 4370:be14f96290a4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 --
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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9
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10 if module:get_host_type() ~= "component" then
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11 error("MUC should be loaded as a component, please see http://prosody.im/doc/components", 0);
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12 end
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13
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14 local muc_host = module:get_host();
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15 local muc_name = module:get_option("name");
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16 if type(muc_name) ~= "string" then muc_name = "Prosody Chatrooms"; end
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17 local restrict_room_creation = module:get_option("restrict_room_creation");
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18 if restrict_room_creation then
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19 if restrict_room_creation == true then
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20 restrict_room_creation = "admin";
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21 elseif restrict_room_creation ~= "admin" and restrict_room_creation ~= "local" then
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22 restrict_room_creation = nil;
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23 end
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24 end
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25 local muc_new_room = module:require "muc".new_room;
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26 local jid_split = require "util.jid".split;
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27 local jid_bare = require "util.jid".bare;
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28 local st = require "util.stanza";
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29 local uuid_gen = require "util.uuid".generate;
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30 local datamanager = require "util.datamanager";
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31 local um_is_admin = require "core.usermanager".is_admin;
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32
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33 rooms = {};
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34 local rooms = rooms;
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35 local persistent_rooms = datamanager.load(nil, muc_host, "persistent") or {};
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36 local component = hosts[module.host];
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37
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38 -- Configurable options
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39 local max_history_messages = module:get_option_number("max_history_messages");
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40
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41 local function is_admin(jid)
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42 return um_is_admin(jid, module.host);
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43 end
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44
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45 local function room_route_stanza(room, stanza) core_post_stanza(component, stanza); end
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46 local function room_save(room, forced)
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47 local node = jid_split(room.jid);
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48 persistent_rooms[room.jid] = room._data.persistent;
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49 if room._data.persistent then
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50 local history = room._data.history;
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51 room._data.history = nil;
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52 local data = {
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53 jid = room.jid;
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54 _data = room._data;
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55 _affiliations = room._affiliations;
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56 };
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57 datamanager.store(node, muc_host, "config", data);
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58 room._data.history = history;
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59 elseif forced then
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60 datamanager.store(node, muc_host, "config", nil);
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61 if not next(room._occupants) then -- Room empty
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62 rooms[room.jid] = nil;
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63 end
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64 end
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65 if forced then datamanager.store(nil, muc_host, "persistent", persistent_rooms); end
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66 end
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67
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68 for jid in pairs(persistent_rooms) do
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69 local node = jid_split(jid);
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70 local data = datamanager.load(node, muc_host, "config") or {};
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71 local room = muc_new_room(jid, {
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72 history_length = max_history_messages;
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73 });
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74 room._data = data._data;
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75 room._data.history_length = max_history_messages; --TODO: Need to allow per-room with a global limit
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76 room._affiliations = data._affiliations;
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77 room.route_stanza = room_route_stanza;
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78 room.save = room_save;
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79 rooms[jid] = room;
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80 end
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81
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82 local host_room = muc_new_room(muc_host, {
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83 history_length = max_history_messages;
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84 });
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85 host_room.route_stanza = room_route_stanza;
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86 host_room.save = room_save;
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87
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88 local function get_disco_info(stanza)
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89 return st.iq({type='result', id=stanza.attr.id, from=muc_host, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#info")
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90 :tag("identity", {category='conference', type='text', name=muc_name}):up()
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91 :tag("feature", {var="http://jabber.org/protocol/muc"}); -- TODO cache disco reply
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92 end
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93 local function get_disco_items(stanza)
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94 local reply = st.iq({type='result', id=stanza.attr.id, from=muc_host, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#items");
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95 for jid, room in pairs(rooms) do
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96 if not room:is_hidden() then
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97 reply:tag("item", {jid=jid, name=room:get_name()}):up();
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98 end
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99 end
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100 return reply; -- TODO cache disco reply
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101 end
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102
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103 local function handle_to_domain(origin, stanza)
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104 local type = stanza.attr.type;
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105 if type == "error" or type == "result" then return; end
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106 if stanza.name == "iq" and type == "get" then
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107 local xmlns = stanza.tags[1].attr.xmlns;
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108 if xmlns == "http://jabber.org/protocol/disco#info" then
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109 origin.send(get_disco_info(stanza));
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110 elseif xmlns == "http://jabber.org/protocol/disco#items" then
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111 origin.send(get_disco_items(stanza));
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112 elseif xmlns == "http://jabber.org/protocol/muc#unique" then
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113 origin.send(st.reply(stanza):tag("unique", {xmlns = xmlns}):text(uuid_gen())); -- FIXME Random UUIDs can theoretically have collisions
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114 else
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115 origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- TODO disco/etc
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116 end
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117 else
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118 host_room:handle_stanza(origin, stanza);
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119 --origin.send(st.error_reply(stanza, "cancel", "service-unavailable", "The muc server doesn't deal with messages and presence directed at it"));
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120 end
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121 end
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122
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123 function stanza_handler(event)
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124 local origin, stanza = event.origin, event.stanza;
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125 local to_node, to_host, to_resource = jid_split(stanza.attr.to);
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126 if to_node then
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127 local bare = to_node.."@"..to_host;
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128 if to_host == muc_host or bare == muc_host then
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129 local room = rooms[bare];
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130 if not room then
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131 if not(restrict_room_creation) or
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132 (restrict_room_creation == "admin" and is_admin(stanza.attr.from)) or
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133 (restrict_room_creation == "local" and select(2, jid_split(stanza.attr.from)) == module.host:gsub("^[^%.]+%.", "")) then
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134 room = muc_new_room(bare, {
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135 history_length = max_history_messages;
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136 });
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137 room.route_stanza = room_route_stanza;
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138 room.save = room_save;
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139 rooms[bare] = room;
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140 end
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141 end
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142 if room then
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143 room:handle_stanza(origin, stanza);
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144 if not next(room._occupants) and not persistent_rooms[room.jid] then -- empty, non-persistent room
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145 rooms[bare] = nil; -- discard room
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146 end
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147 else
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148 origin.send(st.error_reply(stanza, "cancel", "not-allowed"));
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149 end
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150 else --[[not for us?]] end
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151 return true;
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152 end
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153 -- to the main muc domain
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154 handle_to_domain(origin, stanza);
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155 return true;
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156 end
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157 module:hook("iq/bare", stanza_handler, -1);
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158 module:hook("message/bare", stanza_handler, -1);
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159 module:hook("presence/bare", stanza_handler, -1);
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160 module:hook("iq/full", stanza_handler, -1);
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161 module:hook("message/full", stanza_handler, -1);
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162 module:hook("presence/full", stanza_handler, -1);
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163 module:hook("iq/host", stanza_handler, -1);
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164 module:hook("message/host", stanza_handler, -1);
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165 module:hook("presence/host", stanza_handler, -1);
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166
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167 hosts[module.host].send = function(stanza) -- FIXME do a generic fix
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168 if stanza.attr.type == "result" or stanza.attr.type == "error" then
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169 core_post_stanza(component, stanza);
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170 else error("component.send only supports result and error stanzas at the moment"); end
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171 end
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172
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173 prosody.hosts[module:get_host()].muc = { rooms = rooms };
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174
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175 module.save = function()
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176 return {rooms = rooms};
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177 end
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178 module.restore = function(data)
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179 for jid, oldroom in pairs(data.rooms or {}) do
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180 local room = muc_new_room(jid);
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181 room._jid_nick = oldroom._jid_nick;
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182 room._occupants = oldroom._occupants;
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183 room._data = oldroom._data;
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184 room._affiliations = oldroom._affiliations;
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185 room.route_stanza = room_route_stanza;
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186 room.save = room_save;
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187 rooms[jid] = room;
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188 end
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189 prosody.hosts[module:get_host()].muc = { rooms = rooms };
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190 end