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1 | -- Prosody IM v0.3 |
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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 | |
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10 | local register_component = require "core.componentmanager".register_component; |
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11 | local deregister_component = require "core.componentmanager".deregister_component; |
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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; |
782 | 17 | local t_insert, t_remove = table.insert, table.remove; |
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18 | |
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19 | if module:get_host_type() ~= "component" then |
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20 | error("MUC should be loaded as a component, please see http://prosody.im/doc/components", 0); |
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21 | end |
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22 | |
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23 | local muc_domain = module:get_host(); |
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24 | local muc_name = "MUCMUCMUC!!!"; |
782 | 25 | local history_length = 20; |
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26 | |
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27 | -- room_name -> room |
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28 | -- occupant_room_nick -> data |
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29 | -- affiliation = ... |
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30 | -- role |
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31 | -- jid = occupant's real jid |
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32 | local rooms = multitable_new(); |
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33 | |
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34 | local jid_nick = multitable_new(); -- real jid -> room's jid -> room nick |
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35 | |
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36 | -- room_name -> info |
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37 | -- name - the room's friendly name |
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38 | -- subject - the room's subject |
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39 | -- non-anonymous = true|nil |
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40 | -- persistent = true|nil |
782 | 41 | -- history = {preserialized stanzas} |
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42 | local rooms_info = multitable_new(); |
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43 | |
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44 | local persist_list = datamanager.load(nil, muc_domain, 'room_list') or {}; |
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45 | for room in pairs(persist_list) do |
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46 | rooms_info:set(room, datamanager.store(room, muc_domain, 'rooms') or nil); |
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47 | end |
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48 | |
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49 | local component; |
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50 | |
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51 | function filter_xmlns_from_array(array, filters) |
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52 | local count = 0; |
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53 | for i=#array,1,-1 do |
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54 | local attr = array[i].attr; |
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55 | if filters[attr and attr.xmlns] then |
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56 | t_remove(array, i); |
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57 | count = count + 1; |
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58 | end |
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59 | end |
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60 | return count; |
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61 | end |
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62 | function filter_xmlns_from_stanza(stanza, filters) |
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63 | if filters then |
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64 | if filter_xmlns_from_array(stanza.tags, filters) ~= 0 then |
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65 | return stanza, filter_xmlns_from_array(stanza, filters); |
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66 | end |
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67 | end |
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68 | return stanza, 0; |
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69 | end |
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70 | local presence_filters = {["http://jabber.org/protocol/muc"]=true;["http://jabber.org/protocol/muc#user"]=true}; |
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71 | function get_filtered_presence(stanza) |
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72 | return filter_xmlns_from_stanza(st.clone(stanza), presence_filters); |
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73 | end |
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74 | local kickable_error_conditions = { |
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75 | ["gone"] = true; |
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76 | ["internal-server-error"] = true; |
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77 | ["item-not-found"] = true; |
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78 | ["jid-malformed"] = true; |
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79 | ["recipient-unavailable"] = true; |
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80 | ["redirect"] = true; |
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81 | ["remote-server-not-found"] = true; |
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82 | ["remote-server-timeout"] = true; |
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83 | ["service-unavailable"] = true; |
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84 | }; |
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85 | function get_kickable_error(stanza) |
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86 | for _, tag in ipairs(stanza.tags) do |
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87 | if tag.name == "error" and tag.attr.xmlns == "jabber:client" then |
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88 | for _, cond in ipairs(tag.tags) do |
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89 | if cond.attr.xmlns == "urn:ietf:params:xml:ns:xmpp-stanzas" then |
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90 | return kickable_error_conditions[cond.name] and cond.name; |
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91 | end |
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92 | end |
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93 | return true; -- malformed error message |
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94 | end |
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95 | end |
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96 | return true; -- malformed error message |
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97 | end |
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98 | function getUsingPath(stanza, path, getText) |
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99 | local tag = stanza; |
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100 | for _, name in ipairs(path) do |
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101 | if type(tag) ~= 'table' then return; end |
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102 | tag = tag:child_with_name(name); |
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103 | end |
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104 | if tag and getText then tag = table.concat(tag); end |
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105 | return tag; |
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106 | end |
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107 | function getTag(stanza, path) return getUsingPath(stanza, path); end |
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108 | function getText(stanza, path) return getUsingPath(stanza, path, true); end |
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109 | |
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110 | function get_disco_info(stanza) |
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111 | 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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112 | :tag("identity", {category='conference', type='text', name=muc_name}):up() |
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113 | :tag("feature", {var="http://jabber.org/protocol/muc"}); -- TODO cache disco reply |
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114 | end |
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115 | function get_disco_items(stanza) |
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116 | 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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117 | for room in pairs(rooms_info:get()) do |
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118 | reply:tag("item", {jid=room, name=rooms_info:get(room, "name")}):up(); |
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119 | end |
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120 | return reply; -- TODO cache disco reply |
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121 | end |
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122 | function get_room_disco_info(stanza) |
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123 | 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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124 | :tag("identity", {category='conference', type='text', name=rooms_info:get(stanza.attr.to, "name")}):up() |
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125 | :tag("feature", {var="http://jabber.org/protocol/muc"}); -- TODO cache disco reply |
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126 | end |
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127 | function get_room_disco_items(stanza) |
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128 | 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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129 | end -- TODO allow non-private rooms |
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130 | |
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131 | function save_room(room) |
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132 | local persistent = rooms_info:get(room, 'persistent'); |
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133 | if persistent then |
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134 | datamanager.store(room, muc_domain, 'rooms', rooms_info:get(room)); |
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135 | end |
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136 | if persistent ~= persist_list[room] then |
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137 | if not persistent then |
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138 | datamanager.store(room, muc_domain, 'rooms', nil); |
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139 | end |
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140 | persist_list[room] = persistent; |
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141 | datamanager.store(nil, muc_domain, 'room_list', persist_list); |
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142 | end |
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143 | end |
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144 | |
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145 | function set_subject(current_nick, room, subject) |
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146 | -- TODO check nick's authority |
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147 | if subject == "" then subject = nil; end |
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148 | rooms_info:set(room, 'subject', subject); |
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149 | save_room(); |
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151 | :tag('subject'):text(subject):up(); |
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152 | broadcast_message_stanza(room, msg, false); |
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153 | return true; |
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154 | end |
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155 | |
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156 | function broadcast_message_stanza(room, stanza, historic) |
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157 | local r = rooms:get(room); |
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158 | if r then |
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159 | for occupant, o_data in pairs(r) do |
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160 | for jid in pairs(o_data.sessions) do |
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161 | stanza.attr.to = jid; |
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162 | core_route_stanza(component, stanza); |
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163 | end |
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164 | end |
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165 | if historic then -- add to history |
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166 | local history = rooms_info:get(room, 'history'); |
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167 | if not history then history = {}; rooms_info:set(room, 'history', history); end |
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168 | -- stanza = st.clone(stanza); |
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169 | stanza:tag("delay", {xmlns = "urn:xmpp:delay", from = muc_domain, stamp = datetime.datetime()}):up(); -- XEP-0203 |
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170 | stanza:tag("x", {xmlns = "jabber:x:delay", from = muc_domain, stamp = datetime.legacy()}):up(); -- XEP-0091 (deprecated) |
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171 | t_insert(history, st.clone(st.preserialize(stanza))); |
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172 | while #history > history_length do t_remove(history, 1) end |
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173 | end |
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174 | end |
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175 | end |
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176 | function broadcast_presence_stanza(room, stanza, code, nick) |
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177 | stanza = get_filtered_presence(stanza); |
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178 | local data = rooms:get(room, stanza.attr.from); |
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179 | stanza:tag("x", {xmlns='http://jabber.org/protocol/muc#user'}) |
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180 | :tag("item", {affiliation=data.affiliation, role=data.role, nick=nick}):up(); |
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181 | if code then |
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182 | stanza:tag("status", {code=code}):up(); |
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183 | end |
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184 | local me; |
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185 | local r = rooms:get(room); |
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186 | if r then |
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187 | for occupant, o_data in pairs(r) do |
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188 | if occupant ~= stanza.attr.from then |
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189 | for jid in pairs(o_data.sessions) do |
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190 | stanza.attr.to = jid; |
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191 | core_route_stanza(component, stanza); |
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192 | end |
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193 | else |
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194 | me = o_data; |
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195 | end |
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196 | end |
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197 | end |
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198 | if me then |
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199 | stanza:tag("status", {code='110'}); |
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200 | for jid in pairs(me.sessions) do |
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201 | stanza.attr.to = jid; |
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202 | core_route_stanza(component, stanza); |
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203 | end |
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204 | end |
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205 | end |
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206 | |
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207 | function handle_to_occupant(origin, stanza) -- PM, vCards, etc |
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208 | local from, to = stanza.attr.from, stanza.attr.to; |
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209 | local room = jid_bare(to); |
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210 | local current_nick = jid_nick:get(from, room); |
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211 | local type = stanza.attr.type; |
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212 | log("debug", "room: %s, current_nick: %s, stanza: %s", room or "nil", current_nick or "nil", stanza:top_tag()); |
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213 | if (select(2, jid_split(from)) == muc_domain) then error("Presence from the MUC itself!!!"); end |
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214 | if stanza.name == "presence" then |
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215 | local pr = get_filtered_presence(stanza); |
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216 | pr.attr.from = current_nick; |
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217 | if type == "error" then -- error, kick em out! |
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218 | if current_nick then |
820 | 219 | log("debug", "kicking %s from %s", current_nick, room); |
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220 | handle_to_occupant(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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221 | end |
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222 | elseif type == "unavailable" then -- unavailable |
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223 | if current_nick then |
820 | 224 | log("debug", "%s leaving %s", current_nick, room); |
818 | 225 | local data = rooms:get(room, current_nick); |
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226 | data.role = 'none'; |
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227 | broadcast_presence_stanza(room, pr); |
818 | 228 | rooms:remove(room, current_nick); |
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229 | jid_nick:remove(from, room); |
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230 | end |
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231 | elseif not type then -- available |
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232 | if current_nick then |
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233 | if #pr == #stanza or current_nick ~= to then |
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234 | if current_nick == to then -- simple presence |
820 | 235 | log("debug", "%s broadcasted presence", current_nick); |
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236 | rooms:get(room, current_nick).sessions[from] = pr; |
818 | 237 | broadcast_presence_stanza(room, pr); |
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238 | else -- change nick |
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239 | if rooms:get(room, to) then |
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240 | log("debug", "%s couldn't change nick", current_nick); |
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241 | origin.send(st.error_reply(stanza, "cancel", "conflict")); |
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242 | else |
824
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243 | local data = rooms:get(room, current_nick); |
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244 | local to_nick = select(3, jid_split(to)); |
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245 | if to_nick then |
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246 | log("debug", "%s (%s) changing nick to %s", current_nick, data.jid, to); |
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247 | local p = st.presence({type='unavailable', from=current_nick}); |
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248 | broadcast_presence_stanza(room, p, '303', to_nick); |
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249 | rooms:remove(room, current_nick); |
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250 | rooms:set(room, to, data); |
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251 | jid_nick:set(from, room, to); |
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252 | pr.attr.from = to; |
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253 | rooms:get(room, to).sessions[from] = pr; |
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254 | broadcast_presence_stanza(room, pr); |
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255 | else |
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256 | --TODO malformed-jid |
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257 | end |
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258 | end |
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259 | end |
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260 | else -- possible rejoin |
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261 | log("debug", "%s had connection replaced", current_nick); |
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262 | handle_to_occupant(origin, st.presence({type='unavailable', from=from, to=to}):tag('status'):text('Replaced by new connection')); -- send unavailable |
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263 | handle_to_occupant(origin, stanza); -- resend available |
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264 | end |
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265 | else -- enter room |
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266 | local new_nick = to; |
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267 | if rooms:get(room, to) then |
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268 | new_nick = nil; |
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269 | end |
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270 | if not new_nick then |
820 | 271 | log("debug", "%s couldn't join due to nick conflict: %s", from, to); |
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272 | origin.send(st.error_reply(stanza, "cancel", "conflict")); |
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273 | else |
820 | 274 | log("debug", "%s joining as %s", from, to); |
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275 | local data; |
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276 | if not rooms:get(room) and not rooms_info:get(room) then -- new room |
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277 | data = {affiliation='owner', role='moderator', jid=from, sessions={[from]=get_filtered_presence(stanza)}}; |
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278 | end |
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279 | if not data then -- new occupant |
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280 | data = {affiliation='none', role='participant', jid=from, sessions={[from]=get_filtered_presence(stanza)}}; |
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281 | end |
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282 | rooms:set(room, to, data); |
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283 | jid_nick:set(from, room, to); |
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284 | local r = rooms:get(room); |
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285 | if r then |
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286 | for occupant, o_data in pairs(r) do |
817
e3e3919b6c7e
MUC: Fixed: Presence for user joining the roomi was sent twice to the user
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diff
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287 | if occupant ~= to then |
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288 | local pres = get_filtered_presence(o_data.sessions[o_data.jid]); |
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289 | pres.attr.to, pres.attr.from = from, occupant; |
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290 | pres:tag("x", {xmlns='http://jabber.org/protocol/muc#user'}) |
756
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291 | :tag("item", {affiliation=o_data.affiliation, role=o_data.role}):up(); |
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292 | core_route_stanza(component, pres); |
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293 | end |
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294 | end |
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295 | end |
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296 | pr.attr.from = to; |
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297 | broadcast_presence_stanza(room, pr); |
782 | 298 | local history = rooms_info:get(room, 'history'); -- send discussion history |
299 | if history then | |
300 | for _, msg in ipairs(history) do | |
301 | msg = st.deserialize(msg); | |
302 | msg.attr.to=from; | |
303 | core_route_stanza(component, msg); | |
304 | end | |
305 | end | |
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306 | if rooms_info:get(room, 'subject') then |
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307 | core_route_stanza(component, st.message({type='groupchat', from=room, to=from}):tag("subject"):text(rooms_info:get(room, 'subject'))); |
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308 | end |
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309 | end |
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310 | end |
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311 | elseif type ~= 'result' then -- bad type |
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312 | origin.send(st.error_reply(stanza, "modify", "bad-request")); -- FIXME correct error? |
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313 | end |
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314 | elseif not current_nick and type ~= "error" then -- not in room |
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315 | origin.send(st.error_reply(stanza, "cancel", "not-acceptable")); |
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316 | elseif stanza.name == "message" and type == "groupchat" then -- groupchat messages not allowed in PM |
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317 | origin.send(st.error_reply(stanza, "modify", "bad-request")); |
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318 | elseif stanza.name == "message" and type == "error" and get_kickable_error(stanza) then |
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319 | log("debug", "%s kicked from %s for sending an error message", current_nick, room); |
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320 | handle_to_occupant(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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321 | else -- private stanza |
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322 | local o_data = rooms:get(room, to); |
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323 | if o_data then |
820 | 324 | log("debug", "%s sent private stanza to %s (%s)", from, to, o_data.jid); |
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325 | local jid = o_data.jid; |
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326 | 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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327 | stanza.attr.to, stanza.attr.from = jid, current_nick; |
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328 | core_route_stanza(component, stanza); |
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329 | elseif type ~= "error" and type ~= "result" then -- recipient not in room |
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330 | origin.send(st.error_reply(stanza, "cancel", "item-not-found", "Recipient not in room")); |
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331 | end |
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332 | end |
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333 | end |
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334 | |
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335 | function handle_to_room(origin, stanza) -- presence changes and groupchat messages, along with disco/etc |
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336 | local type = stanza.attr.type; |
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337 | if stanza.name == "iq" and type == "get" then -- disco requests |
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338 | local xmlns = stanza.tags[1].attr.xmlns; |
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339 | if xmlns == "http://jabber.org/protocol/disco#info" then |
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340 | origin.send(get_room_disco_info(stanza)); |
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341 | elseif xmlns == "http://jabber.org/protocol/disco#items" then |
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342 | origin.send(get_room_disco_items(stanza)); |
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343 | else |
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344 | origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); |
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345 | end |
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346 | elseif stanza.name == "message" and type == "groupchat" then |
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347 | local from, to = stanza.attr.from, stanza.attr.to; |
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348 | local room = jid_bare(to); |
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349 | local current_nick = jid_nick:get(from, room); |
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350 | if not current_nick then -- not in room |
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351 | origin.send(st.error_reply(stanza, "cancel", "not-acceptable")); |
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352 | else |
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353 | local from = stanza.attr.from; |
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354 | stanza.attr.from = current_nick; |
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355 | local subject = getText(stanza, {"subject"}); |
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356 | if subject then |
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357 | set_subject(current_nick, room, subject); -- TODO use broadcast_message_stanza |
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358 | else |
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359 | broadcast_message_stanza(room, stanza, true); |
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360 | end |
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361 | end |
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362 | elseif stanza.name == "presence" then -- hack - some buggy clients send presence updates to the room rather than their nick |
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363 | local to = stanza.attr.to; |
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364 | local current_nick = jid_nick:get(stanza.attr.from, to); |
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365 | if current_nick then |
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366 | stanza.attr.to = current_nick; |
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367 | handle_to_occupant(origin, stanza); |
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368 | stanza.attr.to = to; |
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369 | elseif type ~= "error" and type ~= "result" then |
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370 | origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); |
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371 | end |
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372 | else |
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373 | if type == "error" or type == "result" then return; end |
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374 | origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); |
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375 | end |
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376 | end |
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377 | |
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378 | function handle_to_domain(origin, stanza) |
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379 | local type = stanza.attr.type; |
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380 | if type == "error" or type == "result" then return; end |
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381 | if stanza.name == "iq" and type == "get" then |
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382 | local xmlns = stanza.tags[1].attr.xmlns; |
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383 | if xmlns == "http://jabber.org/protocol/disco#info" then |
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384 | origin.send(get_disco_info(stanza)); |
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385 | elseif xmlns == "http://jabber.org/protocol/disco#items" then |
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386 | origin.send(get_disco_items(stanza)); |
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387 | else |
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388 | origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- TODO disco/etc |
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389 | end |
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390 | else |
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391 | 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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392 | end |
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393 | end |
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394 | |
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395 | register_component(muc_domain, function(origin, stanza) |
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396 | local to_node, to_host, to_resource = jid_split(stanza.attr.to); |
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397 | if to_resource and not to_node then |
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398 | if type == "error" or type == "result" then return; end |
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399 | origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- host/resource |
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400 | elseif to_resource then |
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401 | handle_to_occupant(origin, stanza); |
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402 | elseif to_node then |
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403 | handle_to_room(origin, stanza) |
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404 | else -- to the main muc domain |
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405 | if type == "error" or type == "result" then return; end |
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406 | handle_to_domain(origin, stanza); |
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407 | end |
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408 | end); |
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409 | |
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410 | module.unload = function() |
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411 | deregister_component(muc_domain); |
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412 | end |
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413 | module.save = function() |
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414 | return {rooms = rooms.data; jid_nick = jid_nick.data; rooms_info = rooms_info.data; persist_list = persist_list}; |
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415 | end |
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416 | module.restore = function(data) |
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417 | rooms.data, jid_nick.data, rooms_info.data, persist_list = |
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418 | data.rooms or {}, data.jid_nick or {}, data.rooms_info or {}, data.persist_list or {}; |
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419 | end |