Mercurial > prosody-modules

annotate mod_muc_rai/mod_muc_rai.lua @ 4047:36b6e3e3f9e2

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mod_conversejs: Disable automatic BOSH/WS endpoint discovery Converse.js 7.0 will enable this by default, but when using this module the BOSH and WebSocket endpoints are provided in the generated HTML, so automatic discovery is not needed and unlikely to work without an additional module.
author Kim Alvefur <zash@zash.se>
date Thu, 18 Jun 2020 15:24:34 +0200
parents 67047ed63b15
children 2ede3450abca
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 local cache = require "util.cache";
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2 local jid = require "util.jid";
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3 local st = require "util.stanza";
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4
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5 local max_subscribers = module:get_option_number("muc_rai_max_subscribers", 1024);
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6
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7 local muc_affiliation_store = module:open_store("config", "map");
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8 local muc_archive = module:open_store("muc_log", "archive");
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9
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10 local xmlns_rai = "xmpp:prosody.im/protocol/rai";
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11
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12 local muc_markers = module:depends("muc_markers");
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13
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14 -- subscriber_jid -> { [room_jid] = interested }
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15 local subscribed_users = cache.new(max_subscribers, false);
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16 -- room_jid -> { [user_jid] = interested }
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17 local interested_users = {};
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18 -- room_jid -> last_id
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19 local room_activity_cache = cache.new(1024);
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20
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21 -- Send a single notification for a room, updating data structures as needed
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22 local function send_single_notification(user_jid, room_jid)
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23 local notification = st.message({ to = user_jid, from = module.host })
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24 :tag("rai", { xmlns = xmlns_rai })
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25 :text_tag("activity", room_jid)
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26 :up();
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27 local interested_room_users = interested_users[room_jid];
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28 if interested_room_users then
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29 interested_room_users[user_jid] = nil;
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30 end
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31 local interested_rooms = subscribed_users:get(user_jid);
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32 if interested_rooms then
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33 interested_rooms[room_jid] = nil;
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34 end
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35 module:log("debug", "Sending notification from %s to %s", room_jid, user_jid);
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36 return module:send(notification);
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37 end
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38
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39 local function subscribe_room(user_jid, room_jid)
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40 local interested_rooms = subscribed_users:get(user_jid);
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41 if not interested_rooms then
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42 return nil, "not-subscribed";
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43 end
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44 module:log("debug", "Subscribed %s to %s", user_jid, room_jid);
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45 interested_rooms[room_jid] = true;
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46
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47 local interested_room_users = interested_users[room_jid];
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48 if not interested_room_users then
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49 interested_room_users = {};
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50 interested_users[room_jid] = interested_room_users;
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51 end
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52 interested_room_users[user_jid] = true;
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53 return true;
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54 end
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55
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56 local function unsubscribe_room(user_jid, room_jid)
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57 local interested_rooms = subscribed_users:get(user_jid);
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58 if not interested_rooms then
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59 return nil, "not-subscribed";
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60 end
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61 interested_rooms[room_jid] = nil;
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62
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63 local interested_room_users = interested_users[room_jid];
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64 if not interested_room_users then
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65 return true;
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66 end
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67 interested_room_users[user_jid] = nil;
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68 return true;
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69 end
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70
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71 local function notify_interested_users(room_jid)
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72 module:log("warn", "NOTIFYING FOR %s", room_jid)
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73 local interested_room_users = interested_users[room_jid];
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74 if not interested_room_users then
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75 module:log("debug", "Nobody interested in %s", room_jid);
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76 return;
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77 end
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78 for user_jid in pairs(interested_room_users) do
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79 send_single_notification(user_jid, room_jid);
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80 end
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81 return true;
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82 end
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83
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84 local function unsubscribe_user_from_all_rooms(user_jid)
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85 local interested_rooms = subscribed_users:get(user_jid);
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86 if not interested_rooms then
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87 return nil, "not-subscribed";
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88 end
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89 for room_jid in pairs(interested_rooms) do
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90 unsubscribe_room(user_jid, room_jid);
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91 end
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92 return true;
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93 end
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94
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95 local function get_last_room_message_id(room_jid)
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96 local last_room_message_id = room_activity_cache:get(room_jid);
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97 if last_room_message_id then
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98 return last_room_message_id;
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99 end
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100
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101 -- Load all the data!
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102 local query = {
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103 limit = 1;
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104 reverse = true;
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105 with = "message<groupchat";
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106 }
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107 local data, err = muc_archive:find(jid.node(room_jid), query);
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108
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109 if not data then
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110 module:log("error", "Could not fetch history: %s", err);
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111 return nil;
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112 end
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113
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114 local id = data();
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115 room_activity_cache:set(room_jid, id);
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116 return id;
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117 end
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118
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119 local function update_room_activity(room_jid, last_id)
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120 room_activity_cache:set(room_jid, last_id);
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121 end
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122
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123 local function get_last_user_read_id(user_jid, room_jid)
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124 return muc_markers.get_user_read_marker(user_jid, room_jid);
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125 end
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126
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127 local function has_new_activity(room_jid, user_jid)
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128 local last_room_message_id = get_last_room_message_id(room_jid);
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129 local last_user_read_id = get_last_user_read_id(user_jid, room_jid);
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130 return last_room_message_id ~= last_user_read_id;
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131 end
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132
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133 -- Returns a set of rooms that a user is interested in
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134 local function get_interested_rooms(user_jid)
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135 -- Use affiliation as an indication of interest, return
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136 -- all rooms a user is affiliated
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137 return muc_affiliation_store:get_all(jid.bare(user_jid));
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138 end
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139
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140 local function is_subscribed(user_jid)
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141 return not not subscribed_users:get(user_jid);
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142 end
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143
3974
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144 -- Subscribes to all rooms that the user has an interest in
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145 -- Returns a set of room JIDs that have already had activity (thus no subscription)
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146 local function subscribe_all_rooms(user_jid)
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147 if is_subscribed(user_jid) then
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148 return nil;
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149 end
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150
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151 -- Send activity notifications for all relevant rooms
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152 local interested_rooms, err = get_interested_rooms(user_jid);
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153
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154 if not interested_rooms then
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155 if err then
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156 return nil, "internal-server-error";
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157 end
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158 interested_rooms = {};
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159 end
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160
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161 if not subscribed_users:set(user_jid, interested_rooms) then
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162 module:log("warn", "Subscriber limit (%d) reached, rejecting subscription from %s", max_subscribers, user_jid);
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163 return nil, "resource-constraint";
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164 end
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165
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166 local rooms_with_activity;
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167 for room_name in pairs(interested_rooms) do
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168 local room_jid = room_name.."@"..module.host;
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169 if has_new_activity(room_jid, user_jid) then
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170 -- There has already been activity, include this room
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171 -- in the response
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172 if not rooms_with_activity then
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173 rooms_with_activity = {};
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174 end
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175 rooms_with_activity[room_jid] = true;
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176 else
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177 -- Subscribe to any future activity
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178 subscribe_room(user_jid, room_jid);
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179 end
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180 end
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181 return rooms_with_activity;
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182 end
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183
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184 module:hook("presence/host", function (event)
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185 local origin, stanza = event.origin, event.stanza;
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186 local user_jid = stanza.attr.from;
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187
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188 if stanza.attr.type == "unavailable" then -- User going offline
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189 unsubscribe_user_from_all_rooms(user_jid);
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190 return true;
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191 end
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192
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193 local rooms_with_activity, err = subscribe_all_rooms(user_jid);
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194
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195 if not rooms_with_activity then
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196 if not err then
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197 module:log("debug", "No activity to notify");
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198 return true;
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199 else
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200 return origin.send(st.error_reply(stanza, "wait", "resource-constraint"));
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201 end
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202 end
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203
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204 local reply = st.message({ to = stanza.attr.from, from = module.host })
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205 :tag("rai", { xmlns = xmlns_rai });
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206 for room_jid in pairs(rooms_with_activity) do
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207 reply:text_tag("activity", room_jid);
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208 end
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209 return origin.send(reply);
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210 end);
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211
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212 module:hook("muc-broadcast-message", function (event)
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213 local room, stanza = event.room, event.stanza;
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214 local archive_id = stanza:get_child_text("stanza-id", "urn:xmpp:sid:0");
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215 if archive_id then
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216 -- Remember the id of the last message so we can compare it
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217 -- to the per-user marker (managed by mod_muc_markers)
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218 update_room_activity(room.jid, archive_id);
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219 -- Notify any users that need to be notified
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220 notify_interested_users(room.jid);
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parents:
diff changeset
221 end
f14c862598a9 mod_muc_rai: New module to implement Room Activity Indicators
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parents:
diff changeset
222 end, -1);
f14c862598a9 mod_muc_rai: New module to implement Room Activity Indicators
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parents:
diff changeset
223