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util/muc.lua

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util/muc.lua @ 1165:ec69bcc7ceb5

stanza_router: Cleaner namespace handling
author Waqas Hussain <waqas20@gmail.com>
date Sat, 16 May 2009 00:33:49 +0500
parent 1145:06051191913d
child 1170:4845372a2c03
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1145
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1 -- Prosody IM v0.4
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2 -- Copyright (C) 2008-2009 Matthew Wild
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3 -- Copyright (C) 2008-2009 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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8
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9 local datamanager = require "util.datamanager";
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10 local datetime = require "util.datetime";
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11
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12 local jid_split = require "util.jid".split;
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13 local jid_bare = require "util.jid".bare;
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14 local st = require "util.stanza";
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15 local log = require "util.logger".init("mod_muc");
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16 local multitable_new = require "util.multitable".new;
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17 local t_insert, t_remove = table.insert, table.remove;
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18
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19 local muc_domain = nil; --module:get_host();
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20 local history_length = 20;
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21
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22 ------------
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23 local function filter_xmlns_from_array(array, filters)
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24 local count = 0;
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25 for i=#array,1,-1 do
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26 local attr = array[i].attr;
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27 if filters[attr and attr.xmlns] then
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28 t_remove(array, i);
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29 count = count + 1;
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30 end
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31 end
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32 return count;
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33 end
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34 local function filter_xmlns_from_stanza(stanza, filters)
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35 if filters then
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36 if filter_xmlns_from_array(stanza.tags, filters) ~= 0 then
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37 return stanza, filter_xmlns_from_array(stanza, filters);
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38 end
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39 end
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40 return stanza, 0;
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41 end
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42 local presence_filters = {["http://jabber.org/protocol/muc"]=true;["http://jabber.org/protocol/muc#user"]=true};
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43 local function get_filtered_presence(stanza)
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44 return filter_xmlns_from_stanza(st.clone(stanza), presence_filters);
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45 end
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46 local kickable_error_conditions = {
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47 ["gone"] = true;
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48 ["internal-server-error"] = true;
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49 ["item-not-found"] = true;
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50 ["jid-malformed"] = true;
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51 ["recipient-unavailable"] = true;
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52 ["redirect"] = true;
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53 ["remote-server-not-found"] = true;
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54 ["remote-server-timeout"] = true;
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55 ["service-unavailable"] = true;
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56 };
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57 local function get_kickable_error(stanza)
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58 for _, tag in ipairs(stanza.tags) do
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59 if tag.name == "error" and tag.attr.xmlns == "jabber:client" then
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60 for _, cond in ipairs(tag.tags) do
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61 if cond.attr.xmlns == "urn:ietf:params:xml:ns:xmpp-stanzas" then
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62 return kickable_error_conditions[cond.name] and cond.name;
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63 end
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64 end
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65 return true; -- malformed error message
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66 end
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67 end
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68 return true; -- malformed error message
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69 end
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70 local function getUsingPath(stanza, path, getText)
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71 local tag = stanza;
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72 for _, name in ipairs(path) do
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73 if type(tag) ~= 'table' then return; end
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74 tag = tag:child_with_name(name);
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75 end
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76 if tag and getText then tag = table.concat(tag); end
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77 return tag;
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78 end
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79 local function getTag(stanza, path) return getUsingPath(stanza, path); end
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80 local function getText(stanza, path) return getUsingPath(stanza, path, true); end
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81 -----------
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82
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83 --[[function get_room_disco_info(room, stanza)
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84 return st.iq({type='result', id=stanza.attr.id, from=stanza.attr.to, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#info")
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85 :tag("identity", {category='conference', type='text', name=room._data["name"]):up()
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86 :tag("feature", {var="http://jabber.org/protocol/muc"}); -- TODO cache disco reply
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87 end
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88 function get_room_disco_items(room, stanza)
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89 return st.iq({type='result', id=stanza.attr.id, from=stanza.attr.to, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#items");
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90 end -- TODO allow non-private rooms]]
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91
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92 --
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93
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94 local function room_broadcast_presence(room, stanza, code, nick)
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95 stanza = get_filtered_presence(stanza);
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96 local data = room._participants[stanza.attr.from];
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97 stanza:tag("x", {xmlns='http://jabber.org/protocol/muc#user'})
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98 :tag("item", {affiliation=data.affiliation, role=data.role, nick=nick}):up();
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99 if code then
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100 stanza:tag("status", {code=code}):up();
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101 end
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102 local me;
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103 for occupant, o_data in pairs(room._participants) do
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104 if occupant ~= stanza.attr.from then
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105 for jid in pairs(o_data.sessions) do
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106 stanza.attr.to = jid;
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107 room:route_stanza(stanza);
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108 end
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109 else
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110 me = o_data;
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111 end
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112 end
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113 if me then
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114 stanza:tag("status", {code='110'});
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115 for jid in pairs(me.sessions) do
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116 stanza.attr.to = jid;
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117 room:route_stanza(stanza);
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118 end
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119 end
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120 end
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121 function room_broadcast_message(room, stanza, historic)
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122 for occupant, o_data in pairs(room._participants) do
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123 for jid in pairs(o_data.sessions) do
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124 stanza.attr.to = jid;
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125 room:route_stanza(stanza);
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126 end
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127 end
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128 if historic then -- add to history
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129 local history = room._data['history'];
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130 if not history then history = {}; room._data['history'] = history; end
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131 -- stanza = st.clone(stanza);
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132 stanza:tag("delay", {xmlns = "urn:xmpp:delay", from = muc_domain, stamp = datetime.datetime()}):up(); -- XEP-0203
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133 stanza:tag("x", {xmlns = "jabber:x:delay", from = muc_domain, stamp = datetime.legacy()}):up(); -- XEP-0091 (deprecated)
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134 t_insert(history, st.clone(st.preserialize(stanza)));
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135 while #history > history_length do t_remove(history, 1) end
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136 end
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137 end
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138
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139
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140 local function room_send_occupant_list(room, to)
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141 local current_nick = room._jid_nick[to];
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142 for occupant, o_data in pairs(room._participants) do
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143 if occupant ~= current_nick then
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144 local pres = get_filtered_presence(o_data.sessions[o_data.jid]);
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145 pres.attr.to, pres.attr.from = to, occupant;
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146 pres:tag("x", {xmlns='http://jabber.org/protocol/muc#user'})
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147 :tag("item", {affiliation=o_data.affiliation, role=o_data.role}):up();
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148 room:route_stanza(pres);
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149 end
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150 end
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151 end
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152 function send_history(room, to)
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153 local history = room._data['history']; -- send discussion history
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154 if history then
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155 for _, msg in ipairs(history) do
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156 msg = st.deserialize(msg);
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157 msg.attr.to=to;
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158 room:route_stanza(msg);
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159 end
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160 end
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161 if room._data['subject'] then
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162 room:route_stanza(st.message({type='groupchat', from=room, to=to}):tag("subject"):text(room._data['subject']));
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163 end
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164 end
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165
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166 local function room_get_disco_info(self, stanza) end
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167 local function room_get_disco_items(self, stanza) end
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168 local function room_set_subject(room, current_nick, room, subject)
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169 -- TODO check nick's authority
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170 if subject == "" then subject = nil; end
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171 room._data['subject'] = subject;
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172 local msg = st.message({type='groupchat', from=current_nick})
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173 :tag('subject'):text(subject):up();
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174 room_broadcast_message(room, msg, false);
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175 return true;
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176 end
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177
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178 local function room_handle_to_occupant(self, origin, stanza) -- PM, vCards, etc
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179 local from, to = stanza.attr.from, stanza.attr.to;
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180 local room = jid_bare(to);
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181 local current_nick = self._jid_nick[from];
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182 local type = stanza.attr.type;
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183 log("debug", "room: %s, current_nick: %s, stanza: %s", room or "nil", current_nick or "nil", stanza:top_tag());
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184 if (select(2, jid_split(from)) == muc_domain) then error("Presence from the MUC itself!!!"); end
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185 if stanza.name == "presence" then
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186 local pr = get_filtered_presence(stanza);
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187 pr.attr.from = current_nick;
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188 if type == "error" then -- error, kick em out!
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189 if current_nick then
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190 log("debug", "kicking %s from %s", current_nick, room);
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191 room_handle_to_occupant(self, origin, st.presence({type='unavailable', from=from, to=to}):tag('status'):text('This participant is kicked from the room because he sent an error presence')); -- send unavailable
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192 end
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193 elseif type == "unavailable" then -- unavailable
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194 if current_nick then
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195 log("debug", "%s leaving %s", current_nick, room);
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196 local data = self._participants[current_nick];
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197 data.role = 'none';
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198 room_broadcast_presence(room, pr);
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199 self._participants[current_nick] = nil;
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200 self._jid_nick[from] = nil;
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201 end
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202 elseif not type then -- available
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203 if current_nick then
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204 --if #pr == #stanza or current_nick ~= to then -- commented because google keeps resending directed presence
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205 if current_nick == to then -- simple presence
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206 log("debug", "%s broadcasted presence", current_nick);
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207 self._participants[current_nick].sessions[from] = pr;
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208 room_broadcast_presence(self, pr);
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209 else -- change nick
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210 if self._participants[to] then
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211 log("debug", "%s couldn't change nick", current_nick);
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212 origin.send(st.error_reply(stanza, "cancel", "conflict"));
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213 else
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214 local data = self._participants[current_nick];
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215 local to_nick = select(3, jid_split(to));
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216 if to_nick then
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217 log("debug", "%s (%s) changing nick to %s", current_nick, data.jid, to);
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218 local p = st.presence({type='unavailable', from=current_nick});
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219 room_broadcast_presence(self, p, '303', to_nick);
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220 self._participants[current_nick] = nil;
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221 self._participants[to] = data;
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222 self._jid_nick[from] = to;
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223 pr.attr.from = to;
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224 self._participants[to].sessions[from] = pr;
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225 room_broadcast_presence(self, pr);
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226 else
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227 --TODO malformed-jid
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228 end
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229 end
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230 end
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231 --else -- possible rejoin
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232 -- log("debug", "%s had connection replaced", current_nick);
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233 -- handle_to_occupant(origin, st.presence({type='unavailable', from=from, to=to}):tag('status'):text('Replaced by new connection'):up()); -- send unavailable
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234 -- handle_to_occupant(origin, stanza); -- resend available
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235 --end
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236 else -- enter room
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237 local new_nick = to;
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238 if self._participants[to] then
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239 new_nick = nil;
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240 end
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241 if not new_nick then
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242 log("debug", "%s couldn't join due to nick conflict: %s", from, to);
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243 origin.send(st.error_reply(stanza, "cancel", "conflict"));
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244 else
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245 log("debug", "%s joining as %s", from, to);
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246 local data;
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247 -- if not rooms:get(room) and not rooms_info:get(room) then -- new room
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248 -- rooms_info:set(room, 'name', (jid_split(room)));
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249 -- data = {affiliation='owner', role='moderator', jid=from, sessions={[from]=get_filtered_presence(stanza)}};
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250 -- end
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251 if not data then -- new occupant
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252 data = {affiliation='none', role='participant', jid=from, sessions={[from]=get_filtered_presence(stanza)}};
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253 end
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254 self._participants[to] = data;
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255 self._jid_nick[from] = to;
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256 room_send_occupant_list(self, from);
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257 pr.attr.from = to;
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258 room_broadcast_presence(self, pr);
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259 room_send_history(self, from);
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260 end
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261 end
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262 elseif type ~= 'result' then -- bad type
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263 origin.send(st.error_reply(stanza, "modify", "bad-request")); -- FIXME correct error?
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264 end
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265 elseif not current_nick and type ~= "error" then -- not in room
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266 origin.send(st.error_reply(stanza, "cancel", "not-acceptable"));
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267 elseif stanza.name == "message" and type == "groupchat" then -- groupchat messages not allowed in PM
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268 origin.send(st.error_reply(stanza, "modify", "bad-request"));
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269 elseif stanza.name == "message" and type == "error" and get_kickable_error(stanza) then
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270 log("debug", "%s kicked from %s for sending an error message", current_nick, room);
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271 room_handle_to_occupant(self, origin, st.presence({type='unavailable', from=from, to=to}):tag('status'):text('This participant is kicked from the room because he sent an error message to another occupant')); -- send unavailable
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272 else -- private stanza
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273 local o_data = self._participants[to];
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274 if o_data then
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275 log("debug", "%s sent private stanza to %s (%s)", from, to, o_data.jid);
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276 local jid = o_data.jid;
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277 if stanza.name=='iq' and type=='get' and stanza.tags[1].attr.xmlns == 'vcard-temp' then jid = jid_bare(jid); end
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278 stanza.attr.to, stanza.attr.from = jid, current_nick;
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279 self:route_stanza(stanza);
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280 elseif type ~= "error" and type ~= "result" then -- recipient not in room
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281 origin.send(st.error_reply(stanza, "cancel", "item-not-found", "Recipient not in room"));
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282 end
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283 end
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284 end
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285
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286 local function room_handle_to_room(self, origin, stanza) -- presence changes and groupchat messages, along with disco/etc
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287 local type = stanza.attr.type;
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288 if stanza.name == "iq" and type == "get" then -- disco requests
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289 local xmlns = stanza.tags[1].attr.xmlns;
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290 if xmlns == "http://jabber.org/protocol/disco#info" then
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291 origin.send(room_get_disco_info(self, stanza));
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292 elseif xmlns == "http://jabber.org/protocol/disco#items" then
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293 origin.send(room_get_disco_items(self, stanza));
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294 else
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295 origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
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296 end
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297 elseif stanza.name == "message" and type == "groupchat" then
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298 local from, to = stanza.attr.from, stanza.attr.to;
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299 local room = jid_bare(to);
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300 local current_nick = self._jid_nick[from];
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301 if not current_nick then -- not in room
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302 origin.send(st.error_reply(stanza, "cancel", "not-acceptable"));
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303 else
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304 local from = stanza.attr.from;
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305 stanza.attr.from = current_nick;
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306 local subject = getText(stanza, {"subject"});
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307 if subject then
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308 self:set_subject(current_nick, subject); -- TODO use broadcast_message_stanza
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309 else
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310 room_broadcast_message(self, stanza, true);
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311 end
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312 end
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313 elseif stanza.name == "presence" then -- hack - some buggy clients send presence updates to the room rather than their nick
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314 local to = stanza.attr.to;
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315 local current_nick = self._jid_nick[stanza.attr.from];
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316 if current_nick then
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317 stanza.attr.to = current_nick;
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318 room_handle_to_occupant(origin, stanza);
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319 stanza.attr.to = to;
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320 elseif type ~= "error" and type ~= "result" then
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321 origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
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322 end
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323 elseif stanza.name == "message" and not stanza.attr.type and #stanza.tags == 1 and self._jid_nick[stanza.attr.from]
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324 and stanza.tags[1].name == "x" and stanza.tags[1].attr.xmlns == "http://jabber.org/protocol/muc#user" and #stanza.tags[1].tags == 1
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325 and stanza.tags[1].tags[1].name == "invite" and stanza.tags[1].tags[1].attr.to then
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326 local _from, _to = stanza.attr.from, stanza.attr.to;
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327 local _invitee = stanza.tags[1].tags[1].attr.to;
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328 stanza.attr.from, stanza.attr.to = _to, _invitee;
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329 stanza.tags[1].tags[1].attr.from, stanza.tags[1].tags[1].attr.to = _from, nil;
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330 self:route_stanza(stanza);
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331 stanza.tags[1].tags[1].attr.from, stanza.tags[1].tags[1].attr.to = nil, _invitee;
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332 stanza.attr.from, stanza.attr.to = _from, _to;
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333 else
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334 if type == "error" or type == "result" then return; end
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335 origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
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336 end
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337 end
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338
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339 local function room_handle_stanza(self, origin, stanza)
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340 local to_node, to_host, to_resource = jid_split(stanza.attr.to);
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341 if to_resource and not to_node then
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342 if type == "error" or type == "result" then return; end
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343 origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- host/resource
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344 elseif to_resource then
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345 room_handle_to_occupant(self, origin, stanza);
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346 elseif to_node then
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347 room_handle_to_room(self, origin, stanza)
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348 else -- to the main muc domain
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349 end
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350 end
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351
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352 module "muc"
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353
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354 function new_room(jid)
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355 return {
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356 jid = jid;
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357 handle_stanza = room_handle_stanza;
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358 set_subject = room_set_subject;
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359 route_stanza = function(room, stanza) end -- Replace with a routing function, e.g., function(room, stanza) core_route_stanza(origin, stanza); end
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360 _jid_nick = {};
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361 _participants = {};
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362 _data = {};
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363 }
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diff changeset
364 end
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365
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366 return _M;
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367
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diff changeset
368 --[[function get_disco_info(stanza)
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369 return st.iq({type='result', id=stanza.attr.id, from=muc_domain, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#info")
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370 :tag("identity", {category='conference', type='text', name=muc_name}):up()
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371 :tag("feature", {var="http://jabber.org/protocol/muc"}); -- TODO cache disco reply
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372 end
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373 function get_disco_items(stanza)
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diff changeset
374 local reply = st.iq({type='result', id=stanza.attr.id, from=muc_domain, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#items");
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375 for room in pairs(rooms_info:get()) do
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376 reply:tag("item", {jid=room, name=rooms_info:get(room, "name")}):up();
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377 end
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378 return reply; -- TODO cache disco reply
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379 end]]
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380
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diff changeset
381 --[[function handle_to_domain(origin, stanza)
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382 local type = stanza.attr.type;
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383 if type == "error" or type == "result" then return; end
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384 if stanza.name == "iq" and type == "get" then
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385 local xmlns = stanza.tags[1].attr.xmlns;
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386 if xmlns == "http://jabber.org/protocol/disco#info" then
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387 origin.send(get_disco_info(stanza));
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388 elseif xmlns == "http://jabber.org/protocol/disco#items" then
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389 origin.send(get_disco_items(stanza));
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390 else
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diff changeset
391 origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- TODO disco/etc
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392 end
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393 else
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394 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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395 end
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diff changeset
396 end
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diff changeset
397
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diff changeset
398 register_component(muc_domain, function(origin, stanza)
06051191913d util.muc: A MUC library - initial commit
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diff changeset
399 local to_node, to_host, to_resource = jid_split(stanza.attr.to);
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diff changeset
400 if to_resource and not to_node then
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parents:
diff changeset
401 if type == "error" or type == "result" then return; end
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402 origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- host/resource
06051191913d util.muc: A MUC library - initial commit
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parents:
diff changeset
403 elseif to_resource then
06051191913d util.muc: A MUC library - initial commit
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diff changeset
404 handle_to_occupant(origin, stanza);
06051191913d util.muc: A MUC library - initial commit
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405 elseif to_node then
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406 handle_to_room(origin, stanza)
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407 else -- to the main muc domain
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408 if type == "error" or type == "result" then return; end
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409 handle_to_domain(origin, stanza);
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410 end
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411 end);]]
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412
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413 --[[module.unload = function()
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414 deregister_component(muc_domain);
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415 end
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416 module.save = function()
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417 return {rooms = rooms.data; jid_nick = jid_nick.data; rooms_info = rooms_info.data; persist_list = persist_list};
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418 end
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419 module.restore = function(data)
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420 rooms.data, jid_nick.data, rooms_info.data, persist_list =
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421 data.rooms or {}, data.jid_nick or {}, data.rooms_info or {}, data.persist_list or {};
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422 end]]