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1 | -- Prosody IM |
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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 | local 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 | local function room_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, 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(self, 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" and type ~= "result" 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 | -- TODO 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(self, 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 then |
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342 | room_handle_to_occupant(self, origin, stanza); |
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343 | else |
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344 | room_handle_to_room(self, origin, stanza); |
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345 | end |
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346 | end |
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347 | |
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348 | module "muc" |
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349 | |
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350 | function new_room(jid) |
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351 | return { |
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352 | jid = jid; |
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353 | handle_stanza = room_handle_stanza; |
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354 | set_subject = room_set_subject; |
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355 | 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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356 | _jid_nick = {}; |
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357 | _participants = {}; |
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358 | _data = {}; |
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359 | } |
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360 | end |
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361 | |
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362 | return _M; |
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363 | |
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364 | --[[function get_disco_info(stanza) |
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365 | 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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366 | :tag("identity", {category='conference', type='text', name=muc_name}):up() |
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367 | :tag("feature", {var="http://jabber.org/protocol/muc"}); -- TODO cache disco reply |
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368 | end |
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369 | function get_disco_items(stanza) |
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370 | 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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371 | for room in pairs(rooms_info:get()) do |
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372 | reply:tag("item", {jid=room, name=rooms_info:get(room, "name")}):up(); |
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373 | end |
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374 | return reply; -- TODO cache disco reply |
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375 | end]] |
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376 | |
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377 | --[[function handle_to_domain(origin, stanza) |
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378 | local type = stanza.attr.type; |
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379 | if type == "error" or type == "result" then return; end |
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380 | if stanza.name == "iq" and type == "get" then |
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381 | local xmlns = stanza.tags[1].attr.xmlns; |
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382 | if xmlns == "http://jabber.org/protocol/disco#info" then |
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383 | origin.send(get_disco_info(stanza)); |
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384 | elseif xmlns == "http://jabber.org/protocol/disco#items" then |
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385 | origin.send(get_disco_items(stanza)); |
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386 | else |
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387 | origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- TODO disco/etc |
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388 | end |
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389 | else |
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390 | 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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391 | end |
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392 | end |
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393 | |
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394 | register_component(muc_domain, function(origin, stanza) |
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395 | local to_node, to_host, to_resource = jid_split(stanza.attr.to); |
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396 | if to_resource and not to_node then |
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397 | if type == "error" or type == "result" then return; end |
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398 | origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- host/resource |
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399 | elseif to_resource then |
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400 | handle_to_occupant(origin, stanza); |
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401 | elseif to_node then |
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402 | handle_to_room(origin, stanza) |
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403 | else -- to the main muc domain |
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404 | if type == "error" or type == "result" then return; end |
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405 | handle_to_domain(origin, stanza); |
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406 | end |
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407 | end);]] |
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408 | |
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409 | --[[module.unload = function() |
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410 | deregister_component(muc_domain); |
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411 | end |
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412 | module.save = function() |
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413 | return {rooms = rooms.data; jid_nick = jid_nick.data; rooms_info = rooms_info.data; persist_list = persist_list}; |
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414 | end |
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415 | module.restore = function(data) |
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416 | rooms.data, jid_nick.data, rooms_info.data, persist_list = |
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417 | data.rooms or {}, data.jid_nick or {}, data.rooms_info or {}, data.persist_list or {}; |
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418 | end]] |