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f9a83aca4421
plugins/muc/register.lib.lua

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plugins/muc/register.lib.lua @ 9240:f9a83aca4421

MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
author Matthew Wild <mwild1@gmail.com>
date Mon, 03 Sep 2018 12:26:25 +0100
child 9262:37b7cf3470f1
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
9240
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1 local jid_bare = require "util.jid".bare;
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2 local jid_resource = require "util.jid".resource;
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3 local resourceprep = require "util.encodings".stringprep.resourceprep;
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4 local st = require "util.stanza";
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5 local dataforms = require "util.dataforms";
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6
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7 local allow_unaffiliated = module:get_option_boolean("allow_unaffiliated_register", false);
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8
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9 local enforce_nick = module:get_option_boolean("enforce_registered_nickname", false);
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10
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11 -- reserved_nicks[nick] = jid
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12 local function get_reserved_nicks(room)
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13 if room._reserved_nicks then
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14 return room._reserved_nicks;
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15 end
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16 module:log("debug", "Refreshing reserved nicks...");
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17 local reserved_nicks = {};
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18 for jid in room:each_affiliation() do
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19 local data = room._affiliation_data[jid];
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20 local nick = data and data.reserved_nickname;
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21 module:log("debug", "Refreshed for %s: %s", jid, nick);
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22 if nick then
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23 reserved_nicks[nick] = jid;
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24 end
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25 end
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26 room._reserved_nicks = reserved_nicks;
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27 return reserved_nicks;
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28 end
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29
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30 -- Returns the registered nick, if any, for a JID
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31 -- Note: this is just the *nick* part, i.e. the resource of the in-room JID
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32 local function get_registered_nick(room, jid)
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33 local registered_data = room._affiliation_data[jid];
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34 if not registered_data then
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35 return;
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36 end
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37 return registered_data.reserved_nickname;
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38 end
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39
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40 -- Returns the JID, if any, that registered a nick (not in-room JID)
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41 local function get_registered_jid(room, nick)
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42 local reserved_nicks = get_reserved_nicks(room);
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43 return reserved_nicks[nick];
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44 end
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45
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46 module:hook("muc-set-affiliation", function (event)
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47 -- Clear reserved nick cache
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48 event.room._reserved_nicks = nil;
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49 end);
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50
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51 module:add_feature("jabber:iq:register");
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52
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53 module:hook("muc-disco#info", function (event)
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54 event.reply:tag("feature", { var = "jabber:iq:register" }):up();
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55 end);
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56
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57 local registration_form = dataforms.new {
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58 { name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/muc#register" },
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59 { name = "muc#register_roomnick", type = "text-single", label = "Nickname"},
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60 };
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61
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62 local function enforce_nick_policy(event)
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63 local origin, stanza = event.origin, event.stanza;
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64 local room = assert(event.room); -- FIXME
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65 if not room then return; end
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66
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67 -- Check if the chosen nickname is reserved
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68 local requested_nick = jid_resource(stanza.attr.to);
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69 local reserved_by = get_registered_jid(room, requested_nick);
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70 if reserved_by and reserved_by ~= jid_bare(stanza.attr.from) then
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71 module:log("debug", "%s attempted to use nick %s reserved by %s", stanza.attr.from, requested_nick, reserved_by);
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72 local reply = st.error_reply(stanza, "cancel", "conflict"):up();
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73 origin.send(reply:tag("x", {xmlns = "http://jabber.org/protocol/muc"}));
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74 return true;
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75 end
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76
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77 -- Check if the occupant has a reservation they must use
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78 if enforce_nick then
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79 local nick = get_registered_nick(room, jid_bare(stanza.attr.from));
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80 if nick then
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81 if event.occupant then
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82 event.occupant.nick = jid_bare(event.occupant.nick) .. "/" .. nick;
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83 elseif event.dest_occupant.nick ~= jid_bare(event.dest_occupant.nick) .. "/" .. nick then
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84 module:log("debug", "Attempt by %s to join as %s, but their reserved nick is %s", stanza.attr.from, requested_nick, nick);
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85 local reply = st.error_reply(stanza, "cancel", "not-acceptable"):up();
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86 origin.send(reply:tag("x", {xmlns = "http://jabber.org/protocol/muc"}));
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87 return true;
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88 end
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89 end
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90 end
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91 end
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92
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93 module:hook("muc-occupant-pre-join", enforce_nick_policy);
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94 module:hook("muc-occupant-pre-change", enforce_nick_policy);
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95
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96 -- Discovering Reserved Room Nickname
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97 -- http://xmpp.org/extensions/xep-0045.html#reservednick
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98 module:hook("muc-disco#info/x-roomuser-item", function (event)
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99 local nick = get_registered_nick(event.room, jid_bare(event.stanza.attr.from));
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100 if nick then
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101 event.reply:tag("identity", { category = "conference", type = "text", name = nick })
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102 end
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103 end);
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104
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105 local function handle_register_iq(room, origin, stanza)
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106 local user_jid = jid_bare(stanza.attr.from)
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107 local affiliation = room:get_affiliation(user_jid);
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108 if affiliation == "outcast" then
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109 origin.send(st.error_reply(stanza, "auth", "forbidden"));
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110 return true;
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111 elseif not (affiliation or allow_unaffiliated) then
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112 origin.send(st.error_reply(stanza, "auth", "registration-required"));
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113 return true;
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114 end
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115 local reply = st.reply(stanza);
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116 local registered_nick = get_registered_nick(room, user_jid);
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117 if stanza.attr.type == "get" then
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118 reply:query("jabber:iq:register");
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
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119 if registered_nick then
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
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parents:
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120 reply:tag("registered"):up();
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
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parents:
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121 reply:tag("username"):text(registered_nick);
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parents:
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122 origin.send(reply);
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
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parents:
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123 return true;
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
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124 end
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
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125 reply:add_child(registration_form:form());
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
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parents:
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126 else -- type == set -- handle registration form
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parents:
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127 local query = stanza.tags[1];
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parents:
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128 if query:get_child("remove") then
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parents:
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129 -- Remove "member" affiliation, but preserve if any other
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parents:
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130 local new_affiliation = affiliation ~= "member" and affiliation;
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parents:
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131 local ok, err_type, err_condition = room:set_affiliation(true, user_jid, new_affiliation, nil, false);
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132 if not ok then
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133 origin.send(st.error_reply(stanza, err_type, err_condition));
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134 return true;
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parents:
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135 end
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136 origin.send(reply);
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137 return true;
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parents:
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138 end
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
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139 local form_tag = query:get_child("x", "jabber:x:data");
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parents:
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140 local reg_data = form_tag and registration_form:data(form_tag);
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parents:
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141 if not reg_data then
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142 origin.send(st.error_reply(stanza, "modify", "bad-request", "Error in form"));
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parents:
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143 return true;
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parents:
diff changeset
144 end
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145 -- Is the nickname valid?
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
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parents:
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146 local desired_nick = resourceprep(reg_data["muc#register_roomnick"]);
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parents:
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147 if not desired_nick then
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148 origin.send(st.error_reply(stanza, "modify", "bad-request", "Invalid Nickname"));
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parents:
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149 return true;
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parents:
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150 end
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parents:
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151 -- Is the nickname currently in use by another user?
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parents:
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152 local current_occupant = room:get_occupant_by_nick(room.jid.."/"..desired_nick);
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parents:
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153 if current_occupant and current_occupant.bare_jid ~= user_jid then
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parents:
diff changeset
154 origin.send(st.error_reply(stanza, "cancel", "conflict"));
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parents:
diff changeset
155 return true;
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
156 end
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
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parents:
diff changeset
157 -- Is the nickname currently reserved by another user?
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
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parents:
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158 local reserved_by = get_registered_jid(room, desired_nick);
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
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parents:
diff changeset
159 if reserved_by and reserved_by ~= user_jid then
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
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parents:
diff changeset
160 origin.send(st.error_reply(stanza, "cancel", "conflict"));
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
161 return true;
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
162 end
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
163
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
164 -- Kick any sessions that are not using this nick before we register it
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
165 if enforce_nick then
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
166 local required_room_nick = room.jid.."/"..desired_nick;
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
167 for room_nick, occupant in room:each_occupant() do
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
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parents:
diff changeset
168 if occupant.bare_jid == user_jid and room_nick ~= required_room_nick then
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
169 room:set_role(true, room_nick, nil); -- Kick (TODO: would be nice to use 333 code)
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
170 end
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
171 end
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
172 end
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
173
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
174 -- Checks passed, save the registration
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
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parents:
diff changeset
175 if registered_nick ~= desired_nick then
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
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parents:
diff changeset
176 local registration_data = { reserved_nickname = desired_nick };
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
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parents:
diff changeset
177 local ok, err_type, err_condition = room:set_affiliation(true, user_jid, "member", nil, registration_data);
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
178 if not ok then
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
179 origin.send(st.error_reply(stanza, err_type, err_condition));
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
180 return true;
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
181 end
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
182 module:log("debug", "Saved nick registration for %s: %s", user_jid, desired_nick);
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
183 origin.send(reply);
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
184 return true;
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
185 end
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
186 end
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
187 origin.send(reply);
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
188 return true;
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
189 end
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
190
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
191 return {
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
192 get_registered_nick = get_registered_nick;
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
193 get_registered_jid = get_registered_jid;
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
194 handle_register_iq = handle_register_iq;
f9a83aca4421 MUC: Add support for registering with a MUC, including reserving a nickname as per XEP-0045
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
195 }