Wed, 31 Dec 2008 10:16:42 +0500
Initial mod_muc: XEP-0045: Multi-User Chat
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Initial mod_muc: XEP-0045: Multi-User Chat
Waqas Hussain <waqas20@gmail.com>
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1 | |
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Waqas Hussain <waqas20@gmail.com>
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2 | |
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3 | local register_component = require "core.componentmanager".register_component; |
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4 | local jid_split = require "util.jid".split; |
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5 | local jid_bare = require "util.jid".bare; |
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6 | local st = require "util.stanza"; |
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7 | local log = require "util.logger".init("mod_muc"); |
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8 | local multitable_new = require "util.multitable".new; |
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9 | |
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10 | local muc_domain = "conference."..module:get_host(); |
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11 | local muc_name = "MUCMUCMUC!!!"; |
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12 | |
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13 | local rooms = multitable_new(); |
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14 | local jid_nick = multitable_new(); |
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15 | local rooms_info = multitable_new(); |
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16 | |
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17 | local component; |
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18 | |
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19 | function getUsingPath(stanza, path, getText) |
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20 | local tag = stanza; |
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21 | for _, name in ipairs(path) do |
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22 | if type(tag) ~= 'table' then return; end |
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23 | tag = tag:child_with_name(name); |
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24 | end |
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25 | if tag and getText then tag = table.concat(tag); end |
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26 | return tag; |
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27 | end |
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28 | function getTag(stanza, path) return getUsingPath(stanza, path); end |
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29 | function getText(stanza, path) return getUsingPath(stanza, path, true); end |
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30 | |
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31 | function get_disco_info(stanza) |
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32 | 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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33 | :tag("identity", {category='conference', type='text', name=muc_name}):up() |
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34 | :tag("feature", {var="http://jabber.org/protocol/muc"}); -- TODO cache disco reply |
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35 | end |
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36 | function get_disco_items(stanza) |
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37 | 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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38 | for room in pairs(rooms_info:get()) do |
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39 | reply:tag("item", {jid=room, name=rooms_info:get(room, "name")}):up(); |
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40 | end |
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41 | return reply; -- TODO cache disco reply |
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42 | end |
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43 | function get_room_disco_info(stanza) |
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44 | 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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45 | :tag("identity", {category='conference', type='text', name=rooms_info:get(stanza.attr.to, "name")}):up() |
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46 | :tag("feature", {var="http://jabber.org/protocol/muc"}); -- TODO cache disco reply |
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47 | end |
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48 | function get_room_disco_items(stanza) |
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49 | 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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50 | end -- TODO allow non-private rooms |
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51 | |
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52 | function broadcast_presence(type, from, room, code) |
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53 | local data = rooms:get(room, from); |
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54 | local stanza = st.presence({type=type, from=from}) |
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55 | :tag("x", {xmlns='http://jabber.org/protocol/muc#user'}) |
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56 | :tag("item", {affiliation=data.affiliation, role=data.role}):up(); |
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57 | if code then |
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58 | stanza:tag("status", {code=code}):up(); |
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59 | end |
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60 | local me; |
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61 | local r = rooms:get(room); |
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62 | if r then |
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63 | for occupant, o_data in pairs(r) do |
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64 | if occupant ~= from then |
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65 | stanza.attr.to = o_data.jid; |
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66 | core_route_stanza(component, stanza); |
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67 | else |
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68 | me = o_data.jid; |
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69 | end |
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70 | end |
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71 | end |
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72 | if me then |
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73 | stanza:tag("status", {code='110'}); |
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74 | stanza.attr.to = me; |
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75 | core_route_stanza(component, stanza); |
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76 | end |
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77 | end |
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78 | function broadcast_message(from, room, subject, body) |
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79 | local stanza = st.message({type='groupchat', from=from}); |
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80 | if subject then stanza:tag('subject'):text(subject):up(); end |
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81 | if body then stanza:tag('body'):text(body):up(); end |
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82 | local r = rooms:get(room); |
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83 | if r then |
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84 | for occupant, o_data in pairs(r) do |
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85 | stanza.attr.to = o_data.jid; |
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86 | core_route_stanza(component, stanza); |
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87 | end |
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88 | end |
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89 | end |
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90 | |
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91 | function handle_to_occupant(origin, stanza) -- PM, vCards, etc |
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92 | local from, to = stanza.attr.from, stanza.attr.to; |
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93 | local room = jid_bare(to); |
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94 | local current_nick = jid_nick:get(from, room); |
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95 | local type = stanza.attr.type; |
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96 | if stanza.name == "presence" then |
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97 | if type == "error" then -- error, kick em out! |
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98 | local data = rooms:get(room, to); |
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99 | data.role = 'none'; |
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100 | broadcast_presence('unavailable', to, room); -- TODO also add <status>This participant is kicked from the room because he sent an error presence: badformed error stanza</status> |
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101 | rooms:remove(room, to); |
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102 | jid_nick:remove(from, room); |
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103 | elseif type == "unavailable" then -- unavailable |
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104 | if current_nick == to then |
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105 | local data = rooms:get(room, to); |
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106 | data.role = 'none'; |
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107 | broadcast_presence('unavailable', to, room); |
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108 | rooms:remove(room, to); |
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109 | jid_nick:remove(from, room); |
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110 | end -- TODO else do nothing? |
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111 | elseif not type then -- available |
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112 | if current_nick then |
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113 | if current_nick == to then -- simple presence |
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114 | -- TODO broadcast |
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115 | else -- change nick |
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116 | if rooms:get(room, to) then |
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117 | origin.send(st.error_reply(stanza, "cancel", "conflict")); |
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118 | else |
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119 | local data = rooms:get(room, current_nick); |
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120 | broadcast_presence('unavailable', current_nick, room, '303'); |
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121 | rooms:remove(room, current_nick); |
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122 | rooms:set(room, to, data); |
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123 | jid_nick:set(from, room, to); |
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124 | broadcast_presence(nil, to, room); |
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125 | end |
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126 | end |
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127 | else -- enter room |
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128 | if rooms:get(room, to) then |
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129 | origin.send(st.error_reply(stanza, "cancel", "conflict")); |
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130 | else |
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131 | local data = {affiliation='none', role='participant', jid=from}; |
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132 | rooms:set(room, to, data); |
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133 | jid_nick:set(from, room, to); |
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134 | local r = rooms:get(room); |
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135 | if r then |
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136 | for occupant, o_data in pairs(r) do |
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137 | if occupant ~= from then |
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138 | local pres = st.presence({to=from, from=occupant}) |
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139 | :tag("x", {xmlns='http://jabber.org/protocol/muc#user'}) |
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140 | :tag("item", {affiliation=o_data.affiliation, role=o_data.role}):up(); |
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141 | core_route_stanza(component, pres); |
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142 | end |
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143 | end |
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144 | end |
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145 | broadcast_presence(nil, to, room); |
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146 | end |
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147 | end |
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148 | elseif type ~= 'result' then -- bad type |
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149 | origin.send(st.error_reply(stanza, "modify", "bad-request")); -- FIXME correct error? |
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150 | end |
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151 | elseif stanza.name == "message" and type == "groupchat" then |
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152 | -- groupchat messages not allowed in PM |
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153 | origin.send(st.error_reply(stanza, "modify", "bad-request")); |
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154 | else |
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155 | origin.send(st.error_reply(stanza, "cancel", "not-implemented", "Private stanzas not implemented")); -- TODO route private stanza |
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156 | end |
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157 | end |
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158 | |
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159 | function handle_to_room(origin, stanza) -- presence changes and groupchat messages, along with disco/etc |
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160 | local type = stanza.attr.type; |
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161 | if stanza.name == "iq" and type == "get" then -- disco requests |
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162 | local xmlns = stanza.tags[1].attr.xmlns; |
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163 | if xmlns == "http://jabber.org/protocol/disco#info" then |
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164 | origin.send(get_room_disco_info(stanza)); |
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165 | elseif xmlns == "http://jabber.org/protocol/disco#items" then |
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166 | origin.send(get_room_disco_items(stanza)); |
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167 | else |
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168 | origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); |
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169 | end |
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170 | elseif stanza.name == "message" and type == "groupchat" then |
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171 | local from, to = stanza.attr.from, stanza.attr.to; |
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172 | local room = jid_bare(to); |
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173 | local current_nick = jid_nick:get(from, room); |
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174 | if not current_nick then -- not in room |
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175 | origin.send(st.error_reply(stanza, "cancel", "not-acceptable")); |
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176 | else |
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177 | broadcast_message(current_nick, room, getText(stanza, {"subject"}), getText(stanza, {"body"})); |
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178 | end |
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179 | else |
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180 | if type == "error" or type == "result" then return; end |
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181 | origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); |
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182 | end |
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183 | end |
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184 | |
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185 | function handle_to_domain(origin, stanza) |
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186 | local type = stanza.attr.type; |
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187 | if type == "error" or type == "result" then return; end |
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188 | if stanza.name == "iq" and type == "get" then |
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189 | local xmlns = stanza.tags[1].attr.xmlns; |
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190 | if xmlns == "http://jabber.org/protocol/disco#info" then |
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191 | origin.send(get_disco_info(stanza)); |
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192 | elseif xmlns == "http://jabber.org/protocol/disco#items" then |
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193 | origin.send(get_disco_items(stanza)); |
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194 | else |
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195 | origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- TODO disco/etc |
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196 | end |
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197 | else |
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198 | 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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199 | end |
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200 | end |
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201 | |
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202 | component = register_component(muc_domain, function(origin, stanza) |
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203 | local to_node, to_host, to_resource = jid_split(stanza.attr.to); |
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204 | if stanza.name == "presence" and stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then |
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205 | if type == "error" or type == "result" then return; end |
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206 | origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- FIXME what's appropriate? |
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207 | elseif to_resource and not to_node then |
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208 | if type == "error" or type == "result" then return; end |
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209 | origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- host/resource |
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210 | elseif to_resource then |
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211 | handle_to_occupant(origin, stanza); |
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212 | elseif to_node then |
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213 | handle_to_room(origin, stanza) |
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214 | else -- to the main muc domain |
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215 | if type == "error" or type == "result" then return; end |
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216 | handle_to_domain(origin, stanza); |
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217 | end |
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218 | end); |